Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1-le tr\u1ec5 th\u1eddi gian: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u0103m ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n <style>\n\/* fonts: BLOG scope only \u2014 copied verbatim from the brand Standard Blog CSS Header. *\/\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n \/* ---- color tokens: OMCH v4 palette (plan palette \u2014 single source of hex) ---- *\/\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n \/* ---- layout ---- *\/\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; word-break: break-word; }\n.bd-post p, .bd-post li { overflow-wrap: break-word; }\n.bd-post .bd-post-article { max-width: var(--prose-width); margin: 0 auto; }\n.bd-post [class*=\"bp-\"] { box-sizing: border-box; }\n\n\/* ---- prose spacing: fixed standard ---- *\/\n.bd-post p { margin: 0 0 1em; }\n.bd-post h1 { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 0 0 16px; }\n.bd-post h2 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 34px; line-height: 1.2; color: var(--heading-ink); margin: 48px 0 16px; }\n.bd-post h3 { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 24px; line-height: 1.25; color: var(--heading-ink); margin: 32px 0 12px; }\n.bd-post h4 { font-weight: 600; line-height: 1.2; margin: 24px 0 8px; }\n.bd-post ul, .bd-post ol { margin: 0 0 1em; padding-left: 1.5em; }\n.bd-post li { margin-bottom: 0.5em; }\n.bd-post li::marker { color: var(--accent-text); }\n.bd-post strong { font-weight: 700; }\n.bd-post em { font-style: italic; }\n.bd-post hr { border: 0; height: 1px; background: var(--divider); margin: 40px 0; }\n\n\/* ---- links: anchor permit-list (visual props only on content forms) ---- *\/\n.bd-post p a, .bd-post li a, .bd-post blockquote a, .bd-post td a {\n color: var(--accent-text);\n font-weight: 500;\n text-decoration: underline;\n text-decoration-color: var(--accent-text);\n text-underline-offset: 2px;\n text-decoration-thickness: 1px;\n}\n\n\/* ---- shared icon ---- *\/\n.bd-post .ico { display: inline-flex; flex: none; width: 18px; height: 18px; }\n.bd-post .ico-lg { width: 24px; height: 24px; }\n\n\/* ---- rich elements: tables ---- *\/\n.bd-post .rich-table-wrap { margin: var(--gap-normal) 0; }\n.bd-post .rich-table-title { margin: 0 0 8px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); }\n.bd-post .table-wrapper { overflow-x: auto; border: 1px solid var(--card-border); border-radius: 8px; margin: 0 0 1em; }\n.bd-post .rich-table { width: 100%; border-collapse: collapse; background: var(--body-bg); }\n.bd-post .rich-table th { background: var(--panel-fill); color: var(--text-primary); font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px; text-align: left; padding: 12px 16px; border-bottom: 2px solid var(--accent-text); white-space: nowrap; }\n.bd-post .rich-table td { color: var(--text-primary); font-size: 15px; padding: 12px 16px; border-bottom: 1px solid var(--divider); vertical-align: top; }\n.bd-post .rich-table tr:last-child td { border-bottom: 0; }\n.bd-post .rich-table tbody tr:hover td:first-child { color: var(--accent-text); }\n\n\/* ---- rich elements: callout (warning \u2014 block-annotating icon form) ---- *\/\n.bd-post .rich-callout {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-left: 4px solid var(--accent-text);\n border-radius: 0 10px 10px 0;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n display: flex; align-items: flex-start; gap: 12px;\n}\n.bd-post .rich-callout-ico { flex: none; color: var(--accent-text); margin-top: 1px; }\n.bd-post .rich-callout-body p:last-child { margin-bottom: 0; }\n\n\/* ---- rich elements: checklist card (no title \u2014 item state icons only) ---- *\/\n.bd-post .rich-card {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-normal) 0;\n}\n.bd-post .rich-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }\n.bd-post .rich-list li { display: flex; align-items: flex-start; gap: 12px; margin: 0; min-width: 0; }\n.bd-post .rich-list .rich-ico { flex: 0 0 22px; width: 22px; height: 22px; color: var(--accent-text); margin-top: 3px; }\n.bd-post .rich-list li > span { flex: 1 1 auto; min-width: 0; }\n\n\/* ---- designed BPs ---- *\/\n.bd-post .bp-1-hook {\n background: var(--inverse-bg);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-attach) 0 var(--gap-normal);\n display: flex; align-items: flex-start; gap: 16px;\n}\n.bd-post .bp-1-icon {\n width: 44px; height: 44px; border-radius: 22px; flex: none;\n border: 1px solid var(--accent);\n display: inline-flex; align-items: center; justify-content: center;\n color: var(--accent);\n}\n.bd-post .bp-1-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }\n.bd-post .bp-1-title { font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-1-lines { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; }\n\n.bd-post .bp-cta-mid {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-mid-ttl {\n display: block;\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 20px; color: var(--heading-ink);\n margin: 0;\n}\n.bd-post .bp-cta-mid-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 20px; height: 20px; }\n.bd-post .bp-cta-mid-copy { margin: 0; }\n.bd-post .bp-cta-mid-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--navy); color: var(--btn-white);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n.bd-post .bp-2-ask {\n background: var(--card-fill);\n border: 1px solid var(--card-border);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-attach) 0 var(--gap-normal);\n}\n.bd-post .bp-2-title { margin: 0 0 14px; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 18px; color: var(--heading-ink); }\n.bd-post .bp-2-title .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-text); width: 18px; height: 18px; }\n.bd-post .bp-2-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin: 0; }\n.bd-post .bp-2-cell { display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px; }\n.bd-post .bp-2-cell:nth-child(even) { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-2-cell:nth-child(n+3) { border-top: 1px solid var(--divider); padding-top: 16px; }\n.bd-post .bp-2-chip {\n display: inline-flex; align-items: center; justify-content: center;\n width: 28px; height: 28px; flex: none;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 15px;\n border-radius: 6px;\n}\n.bd-post .bp-2-cell-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }\n.bd-post .bp-2-label { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-2-line { font-size: 14px; color: var(--text-secondary); margin: 0; }\n\n.bd-post .bp-cta-end {\n background: var(--navy);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-end-ttl { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 22px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-cta-end-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-hot); width: 22px; height: 22px; }\n.bd-post .bp-cta-end-sub { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; max-width: 34em; }\n.bd-post .bp-cta-end-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--accent-hot); color: var(--btn-ink);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n\/* ---- References (canonical .bd-refs) ---- *\/\n.bd-post .bd-refs { margin: 0 0 1em; padding-left: 1.6em; }\n.bd-post .bd-refs li { font-size: 14px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 10px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li::marker { color: var(--accent-text); }\n.bd-post .bd-refs li a { color: var(--accent-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li a:hover { color: var(--heading-ink); }\n\n\/* ---- sanctioned motion ---- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post .rich-card, .bd-post .rich-callout, .bd-post .rich-table-wrap, .bd-post .bp-2-ask { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover, .bd-post .rich-callout:hover, .bd-post .rich-table-wrap:hover, .bd-post .bp-2-ask:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-mid-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-mid-btn:hover { background: var(--accent-text); color: var(--btn-white); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.18); }\n .bd-post .bp-cta-end-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n .bd-post .bd-post-article a { transition: color .2s ease-out, text-decoration-color .2s ease-out; }\n}\n\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 22px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-hook { flex-direction: column; }\n .bd-post .bp-2-grid { grid-template-columns: 1fr; }\n .bd-post .bp-2-cell:nth-child(even) { border-left: 0; padding-left: 16px; }\n .bd-post .bp-2-cell + .bp-2-cell { border-top: 1px solid var(--divider); padding-top: 16px; padding-left: 16px; }\n .bd-post .rich-table th { white-space: normal; }\n}\n <\/style>\n <article class=\"bd-post-article\">\n\n<p>H\u00e3y h\u1ecfi n\u0103m ngu\u1ed3n th\u00f4ng tin kh\u00e1c nhau v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c n\u0103m c\u00e2u tr\u1ea3 l\u1eddi kh\u00e1c nhau. Kh\u00f4ng ph\u1ea3i v\u00ec h\u1ecd kh\u00f4ng \u0111\u1ed3ng \u00fd v\u1edbi nhau, m\u00e0 v\u00ec h\u1ea7u h\u1ebft c\u00e1c l\u1eddi gi\u1ea3i th\u00edch \u0111\u1ec1u nh\u1ea7m l\u1eabn gi\u1eefa hai v\u1ea5n \u0111\u1ec1 ri\u00eang bi\u1ec7t: <em>c\u01a1 ch\u1ebf v\u1eadt l\u00fd t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 nh\u01b0 th\u1ebf n\u00e0o<\/em>, v\u00e0 <em>R\u01a1le ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong khi ch\u1edd \u0111\u1ee3i<\/em>. Th\u1ee9 nh\u1ea5t l\u00e0 l\u1ecbch s\u1eed ph\u1ea7n c\u1ee9ng. Th\u1ee9 hai quy\u1ebft \u0111\u1ecbnh li\u1ec7u m\u00e1y c\u1ee7a b\u1ea1n c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch v\u00e0o \u0111\u00fang th\u1eddi \u0111i\u1ec3m hay kh\u00f4ng. B\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u1ea3 hai kh\u00eda c\u1ea1nh, sau \u0111\u00f3 t\u1eadp trung ch\u1ee7 y\u1ebfu v\u00e0o v\u1ea5n \u0111\u1ec1 ho\u1ea1t \u0111\u1ed9ng, b\u1edfi v\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1 d\u1eabn \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, nh\u1eefng sai l\u1ea7m khi thay th\u1ebf v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p tr\u1ea3 h\u00e0ng t\u1ed1n k\u00e9m.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Time-Delay-Relay.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n<h2>R\u01a1le tr\u1ec5 th\u1eddi gian l\u00e0 g\u00ec \u2014 v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a \u201cth\u1eddi gian tr\u1ec5\u201d l\u00e0 g\u00ec?<\/h2>\n\n<p>R\u01a1le tr\u1ec5 th\u1eddi gian l\u00e0 m\u1ed9t lo\u1ea1i r\u01a1le \u0111i\u1ec1u khi\u1ec3n c\u00f3 b\u1ed9 h\u1eb9n gi\u1edd \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t gi\u1eefa cu\u1ed9n d\u00e2y v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3. M\u1ed9t r\u01a1le ti\u00eau chu\u1ea9n s\u1ebd chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m ngay l\u1eadp t\u1ee9c khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n ho\u1eb7c ng\u1eaft \u0111i\u1ec7n. R\u01a1le tr\u1ec5 th\u1eddi gian th\u00ec kh\u00f4ng. C\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3 s\u1ebd duy tr\u00ec tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i cho \u0111\u1ebfn khi \u0111\u00e1p \u1ee9ng m\u1ed9t \u0111i\u1ec1u ki\u1ec7n th\u1eddi gian: th\u1eddi gian c\u00e0i \u0111\u1eb7t tr\u00f4i qua, t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t xu\u1ea5t hi\u1ec7n, ho\u1eb7c l\u1ec7nh \u0111\u1eb7t l\u1ea1i k\u1ebft th\u00fac chu k\u1ef3. H\u00e3y ph\u00e2n t\u00edch n\u00f3 \u0111\u1ebfn m\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t. A <strong>d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o \u0111i\u1ec1u khi\u1ec3n<\/strong> (cu\u1ed9n d\u00e2y ho\u1eb7c c\u00e1c c\u1ef1c ngu\u1ed3n) cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng v\u00e0 t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian. A <strong>giai \u0111o\u1ea1n x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m<\/strong> \u0111\u1ebfm ng\u01b0\u1ee3c th\u1eddi gian tr\u1ec5 c\u1ee7a b\u1ed9. M\u1ed9t <strong>r\u01a1le \u0111\u1ea7u ra<\/strong> th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng chuy\u1ec3n m\u1ea1ch, th\u01b0\u1eddng c\u00f3 c\u00e1c ti\u1ebfp \u0111i\u1ec3m NO, NC ho\u1eb7c c\u1ea3 hai.<\/p>\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 h\u00e0nh vi quan tr\u1ecdng nh\u1ea5t tr\u01b0\u1edbc ti\u00ean l\u00e0 <em>h\u01b0\u1edbng d\u1eabn<\/em> v\u1ec1 s\u1ef1 ch\u1eadm tr\u1ec5. <strong>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/strong> (c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ed9 tr\u1ec5 khi k\u00edch ho\u1ea1t ho\u1eb7c \u0111\u1ed9 tr\u1ec5 khi v\u1eadn h\u00e0nh): khi c\u1ea5p ngu\u1ed3n, b\u1ed9 h\u1eb9n gi\u1edd b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m ch\u1ec9 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i sau khi h\u1ebft th\u1eddi gian c\u00e0i \u0111\u1eb7t. Khi ng\u1eaft \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n, chu k\u1ef3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i. <strong>Th\u1eddi gian tr\u1ec5 m\u1edf<\/strong> (tr\u00ec ho\u00e3n khi ng\u1eaft ho\u1eb7c tr\u00ec ho\u00e3n khi th\u1ea3): \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n trong khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t c\u00f2n t\u1ed3n t\u1ea1i. Khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t bi\u1ebfn m\u1ea5t, b\u1ed9 h\u1eb9n gi\u1edd m\u1edbi b\u1eaft \u0111\u1ea7u ch\u1ea1y; \u0111\u1ea7u ra s\u1ebd ng\u1eaft khi h\u1ebft th\u1eddi gian.<\/p>\n\n<p>T\u1ea1i sao l\u1ea1i ph\u1ea3i l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb n\u00e0y? Vi\u1ec7c kh\u1edfi \u0111\u1ed9ng c\u00e1c \u0111\u1ed9ng c\u01a1 theo th\u1ee9 t\u1ef1 gi\u00fap tr\u00e1nh t\u00ecnh tr\u1ea1ng t\u1ea5t c\u1ea3 c\u00f9ng ti\u00eau th\u1ee5 d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng c\u00f9ng m\u1ed9t l\u00fac. Vi\u1ec7c duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u1ea1t l\u00e0m m\u00e1t ho\u1eb7c b\u0103ng t\u1ea3i sau khi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng c\u1ee7a ch\u00fang ng\u1eebng ho\u1ea1t \u0111\u1ed9ng s\u1ebd t\u1ea1o th\u1eddi gian \u0111\u1ec3 nhi\u1ec7t t\u1ea3n \u0111i. Vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc x\u1ea3 kh\u00ed ho\u1eb7c b\u00f4i tr\u01a1n s\u01a1 b\u1ed9 theo th\u1ee9 t\u1ef1 s\u1ebd b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb tr\u01b0\u1edbc khi n\u00f3 b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng. M\u1ed7i t\u00e1c v\u1ee5 trong s\u1ed1 \u0111\u00f3 \u0111\u1ec1u thu\u1ed9c lo\u1ea1i \u201cchuy\u1ec3n \u0111\u1ed5i m\u1ed9t th\u1ee9 g\u00ec \u0111\u00f3, nh\u01b0ng ch\u01b0a ph\u1ea3i l\u00fac n\u00e0y\u201d, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do t\u1ed3n t\u1ea1i c\u1ee7a b\u1ed9 ph\u1eadn n\u00e0y.<\/p>\n\n<p>M\u1ed9t l\u01b0u \u00fd v\u1ec1 ph\u1ea1m vi: b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c r\u01a1le tr\u1ec5 th\u1eddi gian trong c\u00e1c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n. Kh\u00ed n\u00e9n <em>b\u1ed9 h\u1eb9n gi\u1edd kh\u00f4ng kh\u00ed<\/em> C\u00e1c thi\u1ebft b\u1ecb l\u00e0m tr\u1ec5 t\u00edn hi\u1ec7u kh\u00f4ng d\u00e2y thu\u1ed9c m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m ri\u00eang bi\u1ec7t, v\u00e0 c\u00e1c m\u00f4-\u0111un l\u00e0m tr\u1ec5 12 V d\u00e0nh cho \u00f4 t\u00f4 tu\u00e2n theo c\u00f9ng m\u1ed9t nguy\u00ean l\u00fd v\u1eadt l\u00fd nh\u01b0ng trong m\u1ed9t b\u1ed1i c\u1ea3nh kh\u00e1c. C\u00e1c nguy\u00ean t\u1eafc d\u01b0\u1edbi \u0111\u00e2y \u00e1p d\u1ee5ng chung cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y; tuy nhi\u00ean, chi ti\u1ebft v\u1ec1 c\u00e1ch \u0111\u1ea5u d\u00e2y th\u00ec kh\u00f4ng.<\/p>\n\n<h2>C\u00e1ch th\u1ee9c th\u1ef1c hi\u1ec7n s\u1ef1 ch\u1eadm tr\u1ec5: B\u1ed1n c\u01a1 ch\u1ebf \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian<\/h2>\n\n<p>C\u01a1 ch\u1ebf \u201cch\u1edd, r\u1ed3i chuy\u1ec3n \u0111\u1ed5i\u201d n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai theo b\u1ed1n c\u00e1ch kh\u00e1c nhau trong su\u1ed1t nhi\u1ec1u th\u1eadp k\u1ef7 qua, v\u00e0 c\u00e1c m\u00e1y m\u00f3c c\u0169 v\u1eabn c\u00f2n gi\u1eef nguy\u00ean c\u1ea3 b\u1ed1n c\u00e1ch \u0111\u00f3. Vi\u1ec7c nh\u1eadn di\u1ec7n c\u01a1 ch\u1ebf n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch b\u1ed9 h\u1eb9n gi\u1edd s\u1ebd ho\u1ea1t \u0111\u1ed9ng khi x\u1ea3y ra s\u1ef1 c\u1ed1.<\/p>\n\n<p><strong>B\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n<\/strong> Khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, m\u1ed9t \u1ed1ng th\u1ed5i \u0111\u1ed9c l\u1eadp s\u1ebd b\u1ecb n\u00e9n l\u1ea1i; kh\u00f4ng kh\u00ed tho\u00e1t ra qua l\u1ed7 van kim v\u1edbi t\u1ed1c \u0111\u1ed9 \u0111\u00e3 c\u00e0i \u0111\u1eb7t, v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m s\u1ebd ng\u1eaft khi \u00e1p su\u1ea5t b\u00ean trong v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng quy \u0111\u1ecbnh. Thi\u1ebft b\u1ecb n\u00e0y kh\u00f4ng c\u1ea7n ngu\u1ed3n cung c\u1ea5p kh\u00ed b\u00ean ngo\u00e0i; \u1ed1ng th\u1ed5i \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n. <strong>B\u1ed9 h\u1eb9n gi\u1edd cho \u0111\u1ed9ng c\u01a1 \u0111\u1ed3ng b\u1ed9<\/strong> \u0111i\u1ec1u khi\u1ec3n m\u1ed9t \u0111\u1ed9ng c\u01a1 c\u00f3 h\u1ed9p s\u1ed1 \u0111\u1ec3 di chuy\u1ec3n m\u1ed9t cam \u0111\u1ebfn v\u1ecb tr\u00ed \u0111\u00e3 \u0111\u1ecbnh. Th\u1eddi gian tr\u1ec5 ch\u00ednh x\u00e1c l\u00e0 th\u1eddi gian di chuy\u1ec3n c\u1ee7a cam, do \u0111\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n. <strong>B\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa (RC)<\/strong> S\u1ea1c t\u1ee5 \u0111i\u1ec7n qua m\u1ed9t \u0111i\u1ec7n tr\u1edf v\u00e0 k\u00edch ho\u1ea1t r\u01a1le \u0111\u1ea7u ra khi \u0111i\u1ec7n \u00e1p tr\u00ean t\u1ee5 \u0111i\u1ec7n v\u01b0\u1ee3t qua ng\u01b0\u1ee1ng c\u1ee7a b\u1ed9 so s\u00e1nh. S\u1ea3n ph\u1ea9m R \u00d7 C ch\u00ednh l\u00e0 \u0111\u1ed9 tr\u1ec5. <strong>B\u1ed9 h\u1eb9n gi\u1edd d\u1ef1a tr\u00ean vi x\u1eed l\u00fd<\/strong> \u0111\u1ebfm s\u1ed1 chu k\u1ef3 dao \u0111\u1ed9ng c\u1ee7a b\u1ed9 dao \u0111\u1ed9ng tinh th\u1ec3 v\u00e0 l\u00e0 ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i. Ch\u00fang c\u0169ng l\u00e0 n\u1ec1n t\u1ea3ng cho c\u00e1c m\u1eabu \u0111a ch\u1ee9c n\u0103ng, trong \u0111\u00f3 c\u00e1c c\u00f4ng t\u1eafc DIP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi kh\u00e1c nhau.<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">B\u1ed1n c\u00e1ch \u0111\u1ec3 t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 \u2014 c\u01a1 ch\u1ebf, \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>C\u01a1 ch\u1ebf<\/th><th>S\u1ef1 ch\u1eadm tr\u1ec5 x\u1ea3y ra nh\u01b0 th\u1ebf n\u00e0o<\/th><th>\u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i \u0111i\u1ec3n h\u00ecnh<\/th><th>Sau khi m\u1ea5t \u0111i\u1ec7n<\/th><th>N\u01a1i b\u1ea1n g\u1eb7p n\u00f3<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Kh\u00ed n\u00e9n<\/td><td>Kh\u00f4ng kh\u00ed t\u1eeb \u1ed1ng th\u1ed5i tho\u00e1t ra qua van kim<\/td><td>\u00b110% so v\u1edbi th\u1eddi gian c\u00e0i \u0111\u1eb7t; c\u00e0i \u0111\u1eb7t 20 gi\u00e2y c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t ng\u1eaft trong kho\u1ea3ng 18\u201322 gi\u00e2y (Rockwell 100-FPTA180)<\/td><td>C\u00f3 th\u1ec3 duy tr\u00ec tr\u1ea1ng th\u00e1i cu\u1ed1i c\u00f9ng trong m\u1ed9t th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng t\u00edch tr\u1eef trong \u1ed1ng bellow<\/td><td>C\u00e1c t\u1ea5m panel c\u0169, \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t<\/td><\/tr>\n <tr><td>\u0110\u1ed9ng c\u01a1 \u0111\u1ed3ng b\u1ed9<\/td><td>\u0110\u1ed9ng c\u01a1 c\u00f3 h\u1ed9p s\u1ed1 \u0111i\u1ec1u khi\u1ec3n tr\u1ee5c cam di chuy\u1ec3n \u0111\u1ebfn m\u1ed9t g\u00f3c \u0111\u00e3 \u0111\u1ecbnh<\/td><td>Ho\u1ea1t \u0111\u1ed9ng theo t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y; kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng tr\u00f4i t\u1ea7n s\u1ed1 khi ch\u1ea1y t\u1ef1 do<\/td><td>D\u1eebng ngay l\u1eadp t\u1ee9c; cam t\u1ef1 \u0111\u1ed9ng d\u1eebng ho\u1eb7c thi\u1ebft l\u1eadp l\u1ea1i theo thi\u1ebft k\u1ebf<\/td><td>N\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd \u0111\u1ed9ng c\u01a1, h\u1ec7 th\u1ed1ng HVAC c\u0169<\/td><\/tr>\n <tr><td>\u0110i\u1ec1u khi\u1ec3n t\u1eeb xa \u0111i\u1ec7n t\u1eed<\/td><td>T\u1ee5 \u0111i\u1ec7n t\u00edch \u0111i\u1ec7n qua m\u1ed9t \u0111i\u1ec7n tr\u1edf<\/td><td>C\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i; \u0111\u1ed9 b\u00e1m d\u00ednh gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng<\/td><td>T\u1eaft ngu\u1ed3n v\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c<\/td><td>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n th\u1ebf h\u1ec7 gi\u1eefa, b\u1ed9 h\u1eb9n gi\u1edd ti\u1ebft ki\u1ec7m<\/td><\/tr>\n <tr><td>B\u1ed9 vi x\u1eed l\u00fd s\u1ed1<\/td><td>B\u1ed9 dao \u0111\u1ed9ng tinh th\u1ec3 \u0111\u1ebfm s\u1ed1 chu k\u1ef3<\/td><td>\u00b10,11 TP3T ho\u1eb7c t\u1ed1t h\u01a1n l\u00e0 th\u00f4ng s\u1ed1 ti\u00eau chu\u1ea9n trong t\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 cung c\u1ea5p<\/td><td>S\u1ebd ng\u1eaft k\u1ebft n\u1ed1i v\u00e0 thi\u1ebft l\u1eadp l\u1ea1i ngay l\u1eadp t\u1ee9c tr\u1eeb khi \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ea1ch l\u01b0u tr\u1eef<\/td><td>C\u00e1c t\u1ea5m pin m\u1edbi, c\u00e1c m\u1eabu \u0111a ch\u1ee9c n\u0103ng<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>C\u00f3 hai con s\u1ed1 \u0111\u00e1ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd \u1edf \u0111\u00e2y, v\u00e0 c\u1ea3 hai \u0111\u1ec1u d\u1ef1a tr\u00ean s\u1ed1 li\u1ec7u th\u1ef1c t\u1ebf ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 chi\u00eau th\u1ee9c ti\u1ebfp th\u1ecb. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00ed n\u00e9n l\u00e0 <strong>\u00b110% so v\u1edbi th\u1eddi gian \u0111\u00e3 \u0111\u1eb7t<\/strong>. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn c\u1ee7a Rockwell d\u00e0nh cho b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n 100-FPTA180 n\u00eau r\u00f5: c\u00e0i \u0111\u1eb7t 20 gi\u00e2y c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 trong kho\u1ea3ng t\u1eeb 18 \u0111\u1ebfn 22 gi\u00e2y (<a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation<\/a>). T\u00e0i li\u1ec7u v\u1ec1 b\u1ed9 h\u1eb9n gi\u1edd kh\u00f4ng kh\u00ed c\u1ee7a SMC c\u0169ng n\u00eau m\u1ee9c \u0111\u1ed9 l\u1eb7p l\u1ea1i \u00b110% (<a href=\"https:\/\/www.smcpneumatics.com\/airtimer.html\">SMC Pneumatics<\/a>). C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd d\u1ef1a tr\u00ean vi x\u1eed l\u00fd \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i <strong>\u00b10,11 TP3T ho\u1eb7c t\u1ed1t h\u01a1n<\/strong> theo t\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 cung c\u1ea5p (<a href=\"https:\/\/www.geya.net\/how-a-time-delay-relay-works\/\">GEYA<\/a>), \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n t\u1edbi hai b\u1eadc \u0111\u1ed9 l\u1edbn. N\u1ebfu m\u1ed9t quy tr\u00ecnh kh\u00f4ng th\u1ec3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng trong kho\u1ea3ng 18\u201322 gi\u00e2y trong t\u1ed5ng th\u1eddi gian c\u00e0i \u0111\u1eb7t l\u00e0 20 gi\u00e2y, th\u00ec d\u00f9 c\u00f3 \u0111i\u1ec1u ch\u1ec9nh van kim th\u1ebf n\u00e0o \u0111i ch\u0103ng n\u1eefa c\u0169ng kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c. \u0110\u00f3 l\u00e0 s\u1ef1 thay \u0111\u1ed5i c\u01a1 ch\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh th\u00f4ng th\u01b0\u1eddng.<\/p>\n\n<p>Ranh gi\u1edbi n\u00e0y c\u0169ng c\u00f3 m\u1eb7t tr\u00e1i: h\u1ec7 th\u1ed1ng kh\u00ed n\u00e9n kh\u00f4ng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c \u0111\u00e3 l\u1ed7i th\u1eddi. C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u1eabn ch\u1ee9ng t\u1ecf \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb c\u1ee7a m\u00ecnh. Ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi nh\u1eefng n\u01a1i kh\u00f4ng c\u00f3 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n t\u1ea1i th\u1eddi \u0111i\u1ec3m h\u1eb9n gi\u1edd, nh\u1eefng m\u00f4i tr\u01b0\u1eddng kh\u00f4ng th\u00edch h\u1ee3p cho thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, v\u00e0 c\u00e1c m\u1ea1ch \u0111i\u1ec7n m\u00e0 vi\u1ec7c gi\u1eef tr\u1ea1ng th\u00e1i c\u01a1 h\u1ecdc trong th\u1eddi gian ng\u1eafn sau khi m\u1ea5t \u0111i\u1ec7n l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. Ch\u00fang ch\u1ec9 l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a th\u1eddi \u0111\u1ea1i, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ea3n ph\u1ea9m l\u1ed7i.<\/p>\n\n<h2>B\u1ea3n \u0111\u1ed3 h\u00e0nh vi: N\u0103m ch\u1ee9c n\u0103ng th\u1eddi gian, G\u00f3c ti\u1ebfp x\u00fac v\u00e0 \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi ngu\u1ed3n \u0111i\u1ec7n b\u1ecb ng\u1eaft<\/h2>\n\n<p>C\u01a1 ch\u1ebf gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c t\u1ea1o ra \u0111\u1ed9 tr\u1ec5; c\u00f2n h\u00e0nh vi th\u00ec cho b\u1ea1n bi\u1ebft <em>khi c\u00e1c ti\u1ebfp \u0111i\u1ec3m chuy\u1ec3n \u0111\u1ed9ng<\/em>, ph\u1ea7n m\u00e0 b\u1ea1n s\u1ebd kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1n h\u00e0ng. H\u00e3y ph\u00e2n t\u00edch b\u1ea5t k\u1ef3 h\u00e0m th\u1eddi gian n\u00e0o b\u1eb1ng c\u00e1ch \u0111\u1eb7t ba c\u00e2u h\u1ecfi sau: <strong>\u0110i\u1ec1u g\u00ec k\u00edch ho\u1ea1t qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian, \u0111\u1ea7u ra s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o khi qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian k\u1ebft th\u00fac, v\u00e0 \u0111i\u1ec1u g\u00ec s\u1ebd thi\u1ebft l\u1eadp l\u1ea1i n\u00f3?<\/strong><\/p>\n\n<h3>N\u0103m ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi c\u01a1 b\u1ea3n<\/h3>\n\n<p><strong>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/strong> l\u00e0 lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. Khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n \u2192 qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2192 \u0111\u1ea7u ra \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t khi h\u1ebft th\u1eddi gian; ng\u1eaft \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n s\u1ebd \u0111\u1eb7t l\u1ea1i thi\u1ebft b\u1ecb. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 theo th\u1ee9 t\u1ef1 xen k\u1ebd, chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 sao-tam gi\u00e1c, x\u1ea3 kh\u00ed \u0111\u1ea7u \u0111\u1ed1t tr\u01b0\u1edbc khi \u0111\u00e1nh l\u1eeda.<\/p>\n\n<p><strong>Th\u1eddi gian tr\u1ec5 m\u1edf<\/strong> l\u00e0 tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai. Khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n \u2192 r\u01a1le \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. Khi \u00e1p d\u1ee5ng t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2192 \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n ngay l\u1eadp t\u1ee9c. Khi ng\u1eaft t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2192 qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2192 \u0111\u1ea7u ra ng\u1eebng c\u1ea5p \u0111i\u1ec7n khi h\u1ebft th\u1eddi gian. Vi\u1ec7c \u00e1p d\u1ee5ng l\u1ea1i t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t trong qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian s\u1ebd \u0111\u1eb7t l\u1ea1i gi\u00e1 tr\u1ecb \u0111\u1ebfm v\u00e0 duy tr\u00ec \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: qu\u1ea1t ph\u1ea3i ti\u1ebfp t\u1ee5c ch\u1ea1y sau khi \u0111\u1ed9ng c\u01a1 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, c\u1eeda \u0111\u01b0\u1ee3c gi\u1eef m\u1edf b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd.<\/p>\n\n<p><strong>Kho\u1ea3ng th\u1eddi gian b\u1eadt<\/strong> k\u00edch ho\u1ea1t \u0111\u1ea7u ra ngay l\u1eadp t\u1ee9c khi c\u00f3 ngu\u1ed3n \u0111i\u1ec7n, h\u1eb9n gi\u1edd v\u00e0 ng\u1eaft \u0111\u1ea7u ra khi h\u1ebft th\u1eddi gian: m\u1ed9t ch\u1ee9c n\u0103ng \u201cgi\u1eef cho \u0111\u1ea7u ra ho\u1ea1t \u0111\u1ed9ng trong \u0111\u00fang X gi\u00e2y\u201d. <strong>One-shot (m\u1ed9t ph\u00e1t)<\/strong> \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n v\u00e0 ph\u00e1t ra m\u1ed9t xung c\u00f3 th\u1eddi gian \u0111\u1ecbnh s\u1eb5n cho m\u1ed7i l\u1ea7n k\u00edch ho\u1ea1t; c\u00e1c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u0111\u1ebfn trong kho\u1ea3ng th\u1eddi gian c\u1ee7a xung n\u00e0y s\u1ebd b\u1ecb b\u1ecf qua. <strong>Ch\u1ebf \u0111\u1ed9 nh\u1ea5p nh\u00e1y \/ chu k\u1ef3 l\u1eb7p l\u1ea1i<\/strong> l\u1eb7p l\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ea7u ra v\u00e0o (c\u00e1c) th\u1eddi \u0111i\u1ec3m \u0111\u00e3 \u0111\u1eb7t mi\u1ec5n l\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p: \u0111\u00e8n c\u1ea3nh b\u00e1o nh\u1ea5p nh\u00e1y, b\u1ed9 c\u1ea5p ngu\u1ed3n gi\u00e1n \u0111o\u1ea1n.<\/p>\n\n<p>Thu\u1eadt ng\u1eef ch\u00ednh l\u00e0 \u0111i\u1ec3m khi\u1ebfn ng\u01b0\u1eddi mua d\u1ec5 nh\u1ea7m l\u1eabn. \u201cDelay on make\u201d, \u201cdelay on operate\u201d v\u00e0 \u201cdelay on energize\u201d \u0111\u1ec1u l\u00e0 c\u00f9ng m\u1ed9t h\u00e0nh vi tr\u1ec5 khi \u0111\u00f3ng (on-delay) nh\u01b0ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 cung c\u1ea5p g\u1ecdi b\u1eb1ng nh\u1eefng thu\u1eadt ng\u1eef kh\u00e1c nhau. H\u00e0nh vi tr\u1ec5 khi m\u1edf (off-delay) t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c thu\u1eadt ng\u1eef \u201cdelay on break\u201d, \u201cdelay on release\u201d v\u00e0 \u201cdelay on de-energization\u201d. C\u00f2n \u201c8 ch\u00e2n so v\u1edbi 11 ch\u00e2n\u201d l\u00e0 v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn ch\u00e2n c\u1eafm, ch\u1ee9 kh\u00f4ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ee9c n\u0103ng. \u0110\u1eebng bao gi\u1edd \u0111\u1ec3 h\u00ecnh d\u1ea1ng v\u1ecf b\u1ecdc \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng m\u00e0 b\u1ea1n \u0111\u1eb7t h\u00e0ng. C\u00e1c \u0111\u1ecbnh ngh\u0129a v\u1ec1 ch\u1ee9c n\u0103ng \u0111\u01b0\u1ee3c n\u00eau \u1edf tr\u00ean nh\u01b0 sau: <a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\">B\u1ea3ng tham chi\u1ebfu c\u00e1c h\u00e0m th\u1eddi gian c\u1ee7a Macromatic<\/a>.<\/p>\n\n<h3>G\u00f3c ti\u1ebfp \u0111i\u1ec3m: NO\/NC \u00d7 \u0111\u00f3ng theo th\u1eddi gian\/m\u1edf theo th\u1eddi gian<\/h3>\n\n<p>Ph\u1ea3i ch\u1ec9 \u0111\u1ecbnh hai l\u1ea7n lo\u1ea1i ti\u1ebfp \u0111i\u1ec3m tr\u1ec5 th\u1eddi gian: ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf ho\u1eb7c ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng \u0111\u00f3ng, <em>v\u00e0<\/em> li\u1ec7u \u0111\u1ed9 tr\u1ec5 c\u00f3 t\u00e1c \u0111\u1ed9ng theo h\u01b0\u1edbng \u0111\u00f3ng hay m\u1edf. Giao nhau c\u1ee7a hai tr\u1ee5c n\u00e0y s\u1ebd cho ra b\u1ed1n ki\u1ec3u ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ti\u1ebfp \u0111i\u1ec3m, \u0111\u00f3 l\u00e0 <a href=\"https:\/\/www.allaboutcircuits.com\/textbook\/digital\/chpt-5\/time-delay-relays\/\">T\u1ea5t c\u1ea3 v\u1ec1 m\u1ea1ch \u0111i\u1ec7n<\/a> \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y d\u01b0\u1edbi d\u1ea1ng NOTC, NOTO, NCTO v\u00e0 NCTC:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">Quadrant li\u00ean h\u1ec7: tr\u1ea1ng th\u00e1i \u00d7 h\u01b0\u1edbng tr\u1ec5<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>M\u00e3<\/th><th>Tr\u1ea1ng th\u00e1i ngh\u1ec9<\/th><th>V\u1ec1 vi\u1ec7c c\u1ea5p ngu\u1ed3n<\/th><th>Khi ng\u1eaft ngu\u1ed3n<\/th><th>C\u00f4ng vi\u1ec7c ph\u1ed5 bi\u1ebfn<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>NOTC (KH\u00d4NG, \u0111\u00f3ng theo th\u1eddi gian)<\/td><td>M\u1edf<\/td><td>\u0110\u00f3ng sau khi h\u1ebft th\u1eddi gian ch\u1edd<\/td><td>M\u1edf ngay l\u1eadp t\u1ee9c<\/td><td>\u201cC\u1ed7 m\u00e1y ch\u1ee7 l\u1ef1c\u201d v\u1edbi ch\u1ebf \u0111\u1ed9 tr\u1ec5 \u0111\u00f3ng; m\u1ed9t ti\u1ebfp \u0111i\u1ec3m NO \u0111\u00f3ng sau th\u1eddi gian t<\/td><\/tr>\n <tr><td>NOTO (KH\u00d4NG, m\u1edf theo th\u1eddi gian)<\/td><td>M\u1edf<\/td><td>\u0110\u00f3ng c\u1eeda ngay l\u1eadp t\u1ee9c<\/td><td>M\u1edf c\u1eeda sau khi h\u1ebft th\u1eddi gian ho\u00e3n<\/td><td>\u0110\u1ea7u ra c\u00f3 \u0111\u1ed9 tr\u1ec5 ng\u1eaft; m\u1ed9t ti\u1ebfp \u0111i\u1ec3m NO ng\u1eaft sau t<\/td><\/tr>\n <tr><td>NCTO (NC, m\u1edf theo th\u1eddi gian)<\/td><td>\u0110\u00e3 \u0111\u00f3ng<\/td><td>M\u1edf c\u1eeda sau khi h\u1ebft th\u1eddi gian ho\u00e3n<\/td><td>\u0110\u00f3ng c\u1eeda ngay l\u1eadp t\u1ee9c<\/td><td>\u201cNg\u1eaft m\u1ea1ch n\u00e0y sau t\u201d khi c\u1ea5p \u0111i\u1ec7n<\/td><\/tr>\n <tr><td>NCTC (NC, \u0111\u00f3ng theo th\u1eddi gian)<\/td><td>\u0110\u00e3 \u0111\u00f3ng<\/td><td>M\u1edf ngay l\u1eadp t\u1ee9c<\/td><td>T\u1eaft sau th\u1eddi gian tr\u1ec5 khi ng\u1eaft ngu\u1ed3n<\/td><td>NC c\u00f3 \u0111\u1ed9 tr\u1ec5 ng\u1eaft; tr\u1edf l\u1ea1i tr\u1ea1ng th\u00e1i \u0111\u00f3ng sau t khi \u0111\u01b0\u1ee3c th\u1ea3 ra<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>Vi\u1ec7c \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u0169ng gi\u1ed1ng nh\u01b0 k\u1ef9 n\u0103ng \u0111\u1ecdc h\u00ecnh \u1ea3nh: m\u1ed9t \u0111\u01b0\u1eddng d\u00e0nh cho t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, m\u1ed9t \u0111\u01b0\u1eddng d\u00e0nh cho ti\u1ebfp \u0111i\u1ec3m \u0111\u1ea7u ra, th\u1eddi gian tr\u00f4i t\u1eeb tr\u00e1i sang ph\u1ea3i. To\u00e0n b\u1ed9 s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1eb7t ra hai c\u00e2u h\u1ecfi: <em>Khi n\u00e0o t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t, v\u00e0 bao l\u00e2u sau khi t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t th\u00ec t\u00edn hi\u1ec7u \u0111\u1ea7u ra m\u1edbi thay \u0111\u1ed5i?<\/em> Tr\u1ea3 l\u1eddi nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c r\u01a1le trong b\u1ea5t k\u1ef3 m\u1ea1ch \u0111i\u1ec7n n\u00e0o m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ghi nh\u1edb b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec. Khi ch\u1ecdn r\u01a1le thay th\u1ebf, tr\u01b0\u1edbc ti\u00ean h\u00e3y \u0111\u1ed1i chi\u1ebfu k\u00fd hi\u1ec7u tr\u00ean b\u1ea3ng t\u00ean c\u0169 v\u1edbi g\u00f3c ph\u1ea7n t\u01b0 n\u00e0y, sau \u0111\u00f3 m\u1edbi \u0111\u1ed1i chi\u1ebfu v\u1edbi ch\u1ee9c n\u0103ng. Hai r\u01a1le c\u00f3 c\u00f9ng m\u00e3 ch\u1ee9c n\u0103ng nh\u01b0ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m g\u00f3c ph\u1ea7n t\u01b0 kh\u00e1c nhau th\u00ec kh\u00f4ng th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau.<\/p>\n\n<h3>Th\u1ef1c t\u1ebf th\u00ec \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n?<\/h3>\n\n<p>\u0110\u00e2y l\u00e0 c\u00e2u m\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u01b0\u1edbng d\u1eabn \u0111\u1ec1u b\u1ecf qua, v\u00e0 c\u0169ng ch\u00ednh l\u00e0 c\u00e2u g\u00e2y ra nhi\u1ec1u nh\u1ea7m l\u1eabn nh\u1ea5t khi th\u1ef1c h\u00e0nh:<\/p>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-icon\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 2v10\"\/><path d=\"M18.4 6.6a9 9 0 1 1-12.77.04\"\/><\/svg>\n <\/div>\n <div class=\"bp-1-body\">\n <p class=\"bp-1-title\">C\u00e1ch x\u1eed l\u00fd m\u1eb7c \u0111\u1ecbnh khi m\u1ea5t \u0111i\u1ec7n l\u00e0: kh\u1edfi \u0111\u1ed9ng l\u1ea1i<\/p>\n <p class=\"bp-1-lines\">Ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng khi m\u1ea1ch \u0111i\u1ec7n v\u1eabn c\u00f2n ngu\u1ed3n. M\u1ed9t ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t ngu\u1ed3n l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u0111\u1eb7c bi\u1ec7t \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 t\u00ednh n\u0103ng ti\u00eau chu\u1ea9n c\u1ee7a ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft.<\/p>\n <\/div>\n<\/div>\n\n<p>C\u1ee5 th\u1ec3, m\u1ea1ch tr\u1ec5 b\u1eadt (off-delay) \u0111\u01b0\u1ee3c chia th\u00e0nh hai s\u1ea3n ph\u1ea9m tr\u00f4ng gi\u1ed1ng h\u1ec7t nhau tr\u00ean k\u1ec7 h\u00e0ng. <strong>Ch\u1ebf \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t<\/strong> c\u1ea7n c\u00f3 \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n duy tr\u00ec li\u00ean t\u1ee5c: khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t b\u1ecb ng\u1eaft, b\u1ed9 \u0111\u1ebfm th\u1eddi gian v\u1eabn ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng, v\u00e0 n\u1ebfu ngu\u1ed3n \u0111i\u1ec7n b\u1ecb ng\u1eaft gi\u1eefa ch\u1eebng, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra s\u1ebd gi\u1ea3m ngay l\u1eadp t\u1ee9c. L\u00fac \u0111\u00f3 s\u1ebd kh\u00f4ng c\u00f2n g\u00ec \u0111\u1ec3 \u0111\u1ebfm n\u1eefa. <strong>\u201cTh\u1eddi gian tr\u1ec5 sau \u201dth\u1ef1c\u201d<\/strong> gi\u1eef cho \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n sau khi ng\u1eaft ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n, v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef, th\u01b0\u1eddng l\u00e0 t\u1eeb \u0111\u01b0\u1eddng \u0111i\u1ec7n t\u1ee5 \u0111i\u1ec7n. T\u00e0i li\u1ec7u tham kh\u1ea3o c\u1ee7a Macromatic m\u00f4 t\u1ea3 tr\u00ecnh t\u1ef1 nh\u01b0 sau: \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n khi c\u00f3 ngu\u1ed3n; th\u1eddi gian \u0111\u1ebfm b\u1eaft \u0111\u1ea7u khi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o b\u1ecb ng\u1eaft; v\u00e0 vi\u1ec7c c\u1ea5p l\u1ea1i ngu\u1ed3n trong kho\u1ea3ng th\u1eddi gian tr\u1ec5 s\u1ebd l\u00e0m thi\u1ebft b\u1ecb tr\u1edf v\u1ec1 tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u. T\u00e0i li\u1ec7u n\u00e0y c\u0169ng l\u01b0u \u00fd r\u1eb1ng m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u01b0\u1edbc kho\u1ea3ng n\u1eeda gi\u00e2y \u0111\u1ec3 \u0111\u01b0\u1eddng \u0111i\u1ec7n d\u1ef1 tr\u1eef c\u00f3 th\u1ec3 s\u1ea1c \u0111\u1ea7y (<a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\">Macromatic<\/a>). C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 \u0111\u1ed9ng c\u01a1 thu\u1ed9c nh\u00f3m th\u1ee9 ba, c\u00f3 kh\u1ea3 n\u0103ng duy tr\u00ec tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m cu\u1ed1i c\u00f9ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u00edch tr\u1eef sau khi m\u1ea5t \u0111i\u1ec7n. \u201cC\u00e1c thi\u1ebft b\u1ecb n\u00e0y s\u1ebd c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn sau khi m\u1ea5t \u0111i\u1ec7n,\u201d nh\u01b0 m\u1ed9t k\u1ef9 s\u01b0 \u0111\u00e3 nh\u1eadn \u0111\u1ecbnh trong m\u1ed9t cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 vi\u1ec7c n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng (<a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">r\/k\u1ef9 thu\u1eadt<\/a>). M\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00f4ng c\u00f3 b\u1ed9 nh\u1edb kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, v\u00e0 vi\u1ec7c k\u1ef3 v\u1ecdng n\u00f3 l\u00e0m \u0111\u01b0\u1ee3c ch\u00ednh l\u00e0 \u0111i\u1ec1u b\u1ea5t ng\u1edd kinh \u0111i\u1ec3n.<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">H\u00e0nh vi khi b\u1ecb gi\u00e1n \u0111o\u1ea1n \u2014 c\u00e1ch m\u1ed7i h\u00e0m ph\u1ea3n \u1ee9ng khi ngu\u1ed3n \u0111i\u1ec7n ho\u1eb7c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t g\u1eb7p s\u1ef1 c\u1ed1<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Ch\u1ee9c n\u0103ng<\/th><th>Ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n b\u1ecb ng\u1eaft gi\u1eefa chu k\u1ef3<\/th><th>B\u1ed9 k\u00edch ho\u1ea1t \u0111\u00e3 b\u1ecb g\u1ee1 b\u1ecf gi\u1eefa chu k\u1ef3<\/th><th>K\u00edch ho\u1ea1t l\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u1ecbnh th\u1eddi<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/td><td>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u ra gi\u1ea3m; s\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i v\u1ec1 0<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 m\u1edf (lo\u1ea1i k\u00edch ho\u1ea1t)<\/td><td>S\u1ea3n l\u01b0\u1ee3ng gi\u1ea3m ngay l\u1eadp t\u1ee9c<\/td><td>Th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2014 \u0111\u00e2y l\u00e0 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t m\u00e0 n\u00f3 \u0111ang ch\u1edd \u0111\u1ee3i<\/td><td>S\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i; \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 t\u1eaft th\u1ef1c (lo\u1ea1i t\u00edch tr\u1eef)<\/td><td>\u0110\u1ed3ng h\u1ed3 ti\u1ebfp t\u1ee5c ch\u1ea1y d\u1ef1a tr\u00ean n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef; c\u00f4ng su\u1ea5t gi\u1ea3m khi h\u1ebft th\u1eddi gian<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>\u0110\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n; s\u1ed1 \u0111\u1ebfm s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i khi ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c<\/td><\/tr>\n <tr><td>Kho\u1ea3ng th\u1eddi gian b\u1eadt<\/td><td>\u0110\u1ea7u ra gi\u1ea3m; s\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><\/tr>\n <tr><td>Ch\u1ec9 m\u1ed9t l\u1ea7n<\/td><td>Xung b\u1ecb c\u1eaft ng\u1eafn; r\u01a1le t\u1ef1 k\u00edch ho\u1ea1t l\u1ea1i<\/td><td>Xung ti\u1ebfp t\u1ee5c (kh\u00f4ng s\u1eed d\u1ee5ng b\u1ed9 k\u00edch ho\u1ea1t trong su\u1ed1t th\u1eddi gian di\u1ec5n ra xung)<\/td><td>B\u1ecb b\u1ecf qua trong su\u1ed1t chu k\u1ef3 xung; t\u1ef1 k\u00edch ho\u1ea1t l\u1ea1i sau \u0111\u00f3<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>\u201cResets\u201d \u1edf tr\u00ean c\u00f3 ngh\u0129a l\u00e0 s\u1ed1 \u0111\u1ebfm s\u1ebd b\u1ecb x\u00f3a b\u1ecf v\u00e0 b\u1eaft \u0111\u1ea7u l\u1ea1i t\u1eeb 0 khi c\u00e1c \u0111i\u1ec1u ki\u1ec7n tr\u1edf l\u1ea1i b\u00ecnh th\u01b0\u1eddng. M\u1ed9t s\u1ed1 bi\u1ebfn th\u1ec3 \u0111\u1eb7c bi\u1ec7t, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t s\u1ed1 h\u00e0m ph\u1ea7n tr\u0103m v\u00e0 h\u00e0m chu k\u1ef3 l\u1eb7p c\u00f3 ch\u1ebf \u0111\u1ed9 ghi nh\u1edb, ho\u1ea1t \u0111\u1ed9ng kh\u00e1c \u0111i, v\u00ec v\u1eady h\u00e3y tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. H\u1eadu qu\u1ea3 th\u1ef1c t\u1ebf l\u00e0 r\u1ea5t r\u00f5 r\u00e0ng. M\u1ed9t m\u1ea1ch \u201cch\u1ea1y qu\u1ea1t li\u00ean t\u1ee5c\u201d \u0111\u01b0\u1ee3c \u201cc\u1ed1 \u0111\u1ecbnh\u201d b\u1eb1ng \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t s\u1ebd l\u00e0m qu\u1ea1t ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ngay l\u1eadp t\u1ee9c khi ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n b\u1ecb ng\u1eaft c\u00f9ng v\u1edbi qu\u1ea1t. \u0110\u00f3 ch\u00ednh l\u00e0 s\u1ef1 nh\u1ea7m l\u1eabn m\u00e0 m\u1ed9t th\u1ee3 \u0111i\u1ec7n \u0111\u00e3 \u0111\u0103ng t\u1ea3i sau khi k\u1ef3 v\u1ecdng r\u1eb1ng \u0111\u1ed9 tr\u1ec5 t\u1eaft s\u1ebd duy tr\u00ec th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n (<a href=\"https:\/\/www.reddit.com\/r\/ElectricalEngineering\/comments\/1v3mojz\/question_about_offdelay_timer_operation_after\/\">r\/K\u1ef9_thu\u1eadt_\u0111i\u1ec7n<\/a>). N\u1ebfu qu\u1ea1t ph\u1ea3i ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t \u0111i\u1ec7n, b\u1ea1n c\u1ea7n m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd t\u1eaft th\u1ef1c s\u1ef1 ho\u1eb7c m\u1ed9t b\u1ed9 gi\u1eef ngu\u1ed3n ri\u00eang bi\u1ec7t. Kh\u00f4ng ph\u1ea3i b\u1ea5t k\u1ef3 b\u1ed9 h\u1eb9n gi\u1edd t\u1eaft n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c.<\/p>\n\n<h2>H\u1ecfng hay ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh? Ki\u1ec3m tra th\u1ef1c \u0111\u1ecba v\u00e0 n\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd c\u01a1 kh\u00ed l\u00ean lo\u1ea1i \u0111i\u1ec7n t\u1eed<\/h2>\n\n<h3>Ki\u1ec3m tra th\u1ef1c t\u1ebf tr\u01b0\u1edbc khi \u0111\u1ed5 l\u1ed7i cho b\u1ed9 h\u1eb9n gi\u1edd<\/h3>\n\n<p>M\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd \u201ckh\u00f4ng c\u00f2n ho\u1ea1t \u0111\u1ed9ng\u201d th\u01b0\u1eddng l\u00e0 do h\u1ebft pin, b\u1ecb h\u1ecfng b\u1ed9 k\u00edch ho\u1ea1t ho\u1eb7c c\u00e0i \u0111\u1eb7t b\u1ecb sai. H\u00e3y ki\u1ec3m tra c\u00e1c nguy\u00ean nh\u00e2n \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <ul class=\"rich-list\">\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra cu\u1ed9n d\u00e2y ho\u1eb7c c\u00e1c c\u1ef1c \u0111i\u1ec1u khi\u1ec3n \u2014 li\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u00f3 th\u1ef1c s\u1ef1 xu\u1ea5t hi\u1ec7n \u0111\u00fang l\u00fac hay kh\u00f4ng? N\u1ebfu kh\u00f4ng c\u00f3 \u0111i\u1ec7n \u00e1p, kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u \u0111\u1ed3ng b\u1ed9, th\u00ec kh\u00f4ng ph\u1ea3i do r\u01a1le g\u00e2y ra s\u1ef1 c\u1ed1.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra m\u1ea1ch k\u00edch ho\u1ea1t tr\u00ean c\u00e1c lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft v\u00e0 lo\u1ea1i m\u1ed9t l\u1ea7n \u2014 li\u1ec7u ti\u1ebfp \u0111i\u1ec3m k\u00edch ho\u1ea1t c\u00f3 th\u1ef1c s\u1ef1 m\u1edf v\u00e0 \u0111\u00f3ng kh\u00f4ng? C\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n b\u1ecb b\u00e1m b\u1ea9n ho\u1eb7c \u0111\u1ea7u ra PLC \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i s\u1ebd khi\u1ebfn m\u1ea1ch k\u00edch ho\u1ea1t kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra l\u1ea1i c\u00e0i \u0111\u1eb7t \u2014 n\u00fam v\u1eb7n b\u1ecb va ch\u1ea1m, c\u00f4ng t\u1eafc DIP b\u1ecb thay \u0111\u1ed5i, ho\u1eb7c c\u00f3 ai \u0111\u00f3 \u0111\u00e3 \u201cch\u1ec9nh s\u1eeda\u201d th\u00f4ng s\u1ed1 th\u1eddi gian ra ngo\u00e0i ph\u1ea1m vi cho ph\u00e9p.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>D\u00f9ng \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd \u0111\u1ec3 \u0111o th\u1eddi gian \u2014 \u0111\u1ed9 tr\u1ec5 b\u1eadt: b\u1eadt ngu\u1ed3n, \u0111o cho \u0111\u1ebfn khi ti\u1ebfp \u0111i\u1ec3m thay \u0111\u1ed5i. \u0110\u1ed9 tr\u1ec5 t\u1eaft: lo\u1ea1i b\u1ecf t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, \u0111o cho \u0111\u1ebfn khi ng\u1eaft. M\u1ed9t b\u1ed9 ph\u1eadn kh\u00ed n\u00e9n c\u00f3 gi\u00e1 tr\u1ecb n\u1eb1m trong kho\u1ea3ng \u00b110% so v\u1edbi c\u00e0i \u0111\u1eb7t \u0111\u01b0\u1ee3c coi l\u00e0 n\u1eb1m trong gi\u1edbi h\u1ea1n dung sai c\u00f4ng b\u1ed1, kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>H\u00e3y ch\u1ee5p \u1ea3nh b\u1ea3ng t\u00ean v\u00e0 ghi l\u1ea1i k\u00fd hi\u1ec7u ch\u1ee9c n\u0103ng tr\u01b0\u1edbc khi th\u00e1o b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn n\u00e0o \u2014 linh ki\u1ec7n thay th\u1ebf s\u1ebd \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi b\u1ea3n ghi \u0111\u00f3, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean tr\u00ed nh\u1edb.<\/span><\/li>\n <\/ul>\n<\/div>\n\n<h3>N\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 c\u01a1 kh\u00ed b\u1eb1ng r\u01a1le \u0111i\u1ec7n t\u1eed<\/h3>\n\n<p>M\u1ed9t s\u1ef1 chuy\u1ec3n \u0111\u1ed5i \u00e2m th\u1ea7m \u0111ang di\u1ec5n ra t\u1ea1i c\u00e1c x\u01b0\u1edfng b\u1ea3o tr\u00ec. C\u00e1c m\u00e1y m\u00f3c c\u0169 v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ho\u1eb7c \u0111\u1ed9ng c\u01a1, trong khi gi\u00e1 ph\u1ee5 t\u00f9ng \u0111\u00e3 tr\u1edf n\u00ean \u0111\u1eaft \u0111\u1ecf. T\u1ea1i m\u1ed9t <a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">Ch\u1ee7 \u0111\u1ec1 tr\u00ean r\/engineering<\/a>, m\u1ed9t gi\u00e1m \u0111\u1ed1c b\u1ea3o tr\u00ec \u0111\u00e3 \u0111\u01b0a ra m\u1ee9c gi\u00e1 h\u01a1n US$700 cho vi\u1ec7c thay th\u1ebf m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ch\u00ednh h\u00e3ng (OEM). B\u1ed9 h\u1eb9n gi\u1edd n\u00e0y \u0111\u01b0\u1ee3c l\u1eafp tr\u00ean m\u1ed9t m\u00e1y h\u00e0n qu\u1ef9 \u0111\u1ea1o, v\u00e0 \u00f4ng \u0111\u00e3 th\u1eafc m\u1eafc t\u1ea1i sao kh\u00f4ng \u0111i\u1ec1u khi\u1ec3n c\u00f9ng m\u1ed9t r\u01a1le b\u1eb1ng m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed th\u00f4ng th\u01b0\u1eddng. \u00dd ki\u1ebfn chung trong ch\u1ee7 \u0111\u1ec1 n\u00e0y l\u00e0: vi\u1ec7c thay th\u1ebf b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed l\u00e0 \u0111i\u1ec1u th\u01b0\u1eddng th\u1ea5y v\u00e0 r\u1ebb h\u01a1n \u0111\u00e1ng k\u1ec3, nh\u01b0ng c\u00f3 hai \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd: vi\u1ec7c thay \u0111\u1ed5i h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n v\u00e0 c\u01a1 ch\u1ebf an to\u00e0n khi h\u1ecfng h\u00f3c.<\/p>\n\n<p>Vi\u1ec7c n\u00e2ng c\u1ea5p l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi h\u00e0nh vi, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c ch\u1ec9 t\u1eadp trung v\u00e0o m\u00e3 s\u1ea3n ph\u1ea9m:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">Ma tr\u1eadn thay th\u1ebf \u2014 nh\u1eefng \u0111i\u1ec1u c\u1ea7n x\u00e1c nh\u1eadn tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n vi\u1ec7c thay th\u1ebf \u0111i\u1ec7n t\u1eed, v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1eebng c\u00e2u tr\u1ea3 l\u1eddi<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Y\u1ebfu t\u1ed1 then ch\u1ed1t c\u1ee7a m\u1ea1ch n\u00e0y l\u00e0 g\u00ec<\/th><th>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n x\u00e1c nh\u1eadn<\/th><th>Tr\u1ea3 l\u1eddi \u0111i\u1ec7n t\u1eed n\u1ebfu \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn<\/th><th>N\u1ebfu b\u1ea1n b\u1ecf qua ph\u1ea7n n\u00e0y<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Th\u1eddi gian tr\u1ec5 sau khi c\u1ea5p \u0111i\u1ec7n<\/td><td>Ch\u1ee9c n\u0103ng n\u00e0y l\u00e0 ch\u1ebf \u0111\u1ed9 tr\u1ec5 b\u1eadt; l\u01b0u \u00fd ti\u1ebfp \u0111i\u1ec3m g\u00f3c ph\u1ea7n t\u01b0 tr\u00ean b\u1ea3ng t\u00ean<\/td><td>M\u00f4 h\u00ecnh tr\u1ec5 b\u1eadt ti\u00eau chu\u1ea9n; t\u01b0\u01a1ng th\u00edch v\u1edbi NOTC ho\u1eb7c NCTO<\/td><td>Vi\u1ec7c ti\u1ebfp x\u00fac sai g\u00f3c ph\u1ea7n t\u01b0 s\u1ebd \u0111\u1ea3o ng\u01b0\u1ee3c logic<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 t\u1eaft khi ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n lu\u00f4n c\u00f3 s\u1eb5n<\/td><td>Lo\u1ea1i c\u00f4ng t\u1eafc k\u00edch ho\u1ea1t v\u00e0 c\u1ea5p \u0111i\u1ec7n \u00e1p<\/td><td>Ch\u1ebf \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t; h\u00e3y k\u1ebft n\u1ed1i d\u00e2y k\u00edch ho\u1ea1t \u0111\u00fang c\u00e1ch (ti\u1ebfp \u0111i\u1ec3m kh\u00f4 so v\u1edbi \u0111i\u1ec7n \u00e1p)<\/td><td>Vi\u1ec7c c\u1ea5p \u0111i\u1ec7n \u00e1p v\u00e0o \u0111\u1ea7u v\u00e0o k\u00edch ho\u1ea1t ki\u1ec3u ti\u1ebfp \u0111i\u1ec3m kh\u00f4 c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng r\u01a1le<\/td><\/tr>\n <tr><td>Thi\u1ebft b\u1ecb v\u1eabn duy tr\u00ec tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n \u0111i\u1ec7n<\/td><td>M\u1ea1ch n\u00e0y c\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ea1ch gi\u1eef kh\u00f4ng?<\/td><td>Th\u1eddi gian tr\u1ec5 t\u1eaft th\u1ef1c (lo\u1ea1i l\u01b0u tr\u1eef) ho\u1eb7c m\u1ea1ch gi\u1eef c\u00f3 ngu\u1ed3n c\u1ea5p ri\u00eang<\/td><td>T\u00ecnh tr\u1ea1ng m\u1eb7c \u0111\u1ecbnh \u0111i\u1ec7n t\u1eed gi\u1ea3m ngay l\u1eadp t\u1ee9c \u2014 m\u1ed9t s\u1ef1 thay \u0111\u1ed5i v\u1ec1 h\u00e0nh vi, v\u00e0 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 an to\u00e0n<\/td><\/tr>\n <tr><td>C\u00e1c ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 t\u1ee9c th\u1eddi<\/td><td>C\u00e1c ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 c\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u kh\u00e1c trong m\u1ea1ch logic kh\u00f4ng?<\/td><td>M\u00f4 h\u00ecnh c\u00f3 ti\u1ebfp \u0111i\u1ec3m t\u1ee9c th\u1eddi v\u00e0 ti\u1ebfp \u0111i\u1ec3m h\u1eb9n gi\u1edd<\/td><td>N\u1ebfu kh\u00f4ng c\u00f3 \u0111\u1ea7u v\u00e0o ph\u1ee5 (aux), c\u00f3 ngh\u0129a l\u00e0 c\u1ea7n l\u1eafp th\u00eam m\u1ed9t r\u01a1le th\u1ee9 hai ho\u1eb7c ph\u1ea3i \u0111\u1ea5u l\u1ea1i d\u00e2y \u0111i\u1ec7n<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ho\u1eb7c \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/td><td>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) hay d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC), v\u00e0 gi\u00e1 tr\u1ecb n\u00e0o<\/td><td>Kh\u1edbp ch\u00ednh x\u00e1c<\/td><td>\u0110i\u1ec7n \u00e1p sai \u2014 kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u \u0111\u1ed3ng b\u1ed9, ho\u1eb7c \u0111\u1ea7u v\u00e0o b\u1ecb ch\u00e1y<\/td><\/tr>\n <tr><td>\u1ed4 c\u1eafm v\u00e0 gi\u00e1 \u0111\u1ee1<\/td><td>8 ch\u00e2n ho\u1eb7c 11 ch\u00e2n (lo\u1ea1i octal), l\u1eafp tr\u00ean thanh DIN, l\u1eafp tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/td><td>Ch\u1ecdn m\u1eabu c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, ho\u1eb7c d\u1ef1 tr\u00f9 kinh ph\u00ed \u0111\u1ec3 thay \u0111\u1ed5i n\u1ec1n t\u1ea3ng<\/td><td>M\u1ed9t chi ph\u00ed c\u1ea3i t\u1ea1o c\u01a1 kh\u00ed b\u1ea5t ng\u1edd v\u00e0o ph\u00fat ch\u00f3t<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t n\u1ed5i b\u1eadt nh\u1ea5t n\u1eb1m \u1edf h\u00e0ng th\u1ee9 ba: ch\u1ee9c n\u0103ng gi\u1eef khi m\u1ea5t \u0111i\u1ec7n. C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 gi\u1eef c\u00e1c ti\u1ebfp \u0111i\u1ec3m trong th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u00edch tr\u1eef; trong khi \u0111\u00f3, r\u01a1le \u0111i\u1ec7n t\u1eed kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng t\u00edch tr\u1eef n\u0103ng l\u01b0\u1ee3ng th\u00ec kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. N\u1ebfu m\u1ea1ch ban \u0111\u1ea7u d\u1ef1a v\u00e0o ch\u1ee9c n\u0103ng gi\u1eef n\u00e0y, vi\u1ec7c thay th\u1ebf tr\u1ef1c ti\u1ebfp b\u1eb1ng r\u01a1le \u0111i\u1ec7n t\u1eed s\u1ebd l\u00e0m thay \u0111\u1ed5i c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y m\u00f3c. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t chi\u1ebfc qu\u1ea1t ph\u1ea3i l\u00e0m m\u00e1t tr\u1ee5c quay sau khi n\u00fat d\u1eebng ng\u1eaft to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng, ho\u1eb7c m\u1ed9t van ph\u1ea3i gi\u1eef nguy\u00ean v\u1ecb tr\u00ed trong tr\u01b0\u1eddng h\u1ee3p s\u1ee5t \u00e1p. Trong c\u00e1c m\u1ea1ch li\u00ean quan \u0111\u1ebfn an to\u00e0n, \u0111\u00f3 l\u00e0 m\u1ed9t thay \u0111\u1ed5i thi\u1ebft k\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i vi\u1ec7c mua ph\u1ee5 t\u00f9ng thay th\u1ebf. M\u1ed9t ng\u01b0\u1eddi b\u00ecnh lu\u1eadn trong c\u00f9ng ch\u1ee7 \u0111\u1ec1 \u0111\u00e3 n\u00f3i th\u1eb3ng \u0111i\u1ec1u n\u00e0y: \u201cMi\u1ec5n l\u00e0 v\u1eabn c\u00f3 \u0111i\u1ec7n, b\u1ea1n c\u00f3 th\u1ec3 sao ch\u00e9p ch\u00ednh x\u00e1c h\u00e0nh vi \u0111\u00f3 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng r\u01a1le tr\u1ec5 \u0111i\u1ec7n.\u201d S\u1ef1 kh\u00e1c bi\u1ec7t ch\u1ec9 xu\u1ea5t hi\u1ec7n sau khi m\u1ea5t \u0111i\u1ec7n (<a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">r\/k\u1ef9 thu\u1eadt<\/a>).<\/p>\n\n<p>M\u1eb7t t\u00edch c\u1ef1c c\u0169ng kh\u00f4ng k\u00e9m ph\u1ea7n r\u00f5 r\u00e0ng. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n t\u1eeb \u00b110% so v\u1edbi c\u00e0i \u0111\u1eb7t (18\u201322 gi\u00e2y tr\u00ean m\u1eb7t s\u1ed1 20 gi\u00e2y) l\u00ean m\u1ee9c \u00b10,1% (<a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation<\/a>; <a href=\"https:\/\/www.geya.net\/how-a-time-delay-relay-works\/\">GEYA<\/a>). H\u01a1n n\u1eefa, kh\u00f4ng c\u00f3 van kim n\u00e0o b\u1ecb l\u1ec7ch, c\u0169ng kh\u00f4ng c\u00f3 \u1ed1ng th\u1ed5i n\u00e0o b\u1ecb l\u00e3o h\u00f3a.<\/p>\n\n<p>Khi b\u1ea1n g\u1eedi y\u00eau c\u1ea7u thay th\u1ebf \u0111\u00f3, nh\u00e0 cung c\u1ea5p c\u1ea7n tr\u1ea3 l\u1eddi chi ti\u1ebft theo t\u1eebng m\u1eabu s\u1ea3n ph\u1ea9m cho ch\u00ednh x\u00e1c s\u00e1u m\u1ee5c sau: ch\u1ee9c n\u0103ng, \u0111\u1eb7c t\u00ednh m\u1ea5t \u0111i\u1ec7n, lo\u1ea1i k\u00edch ho\u1ea1t, ti\u1ebfp \u0111i\u1ec3m ph\u1ee5, \u0111i\u1ec7n \u00e1p, k\u00edch th\u01b0\u1edbc l\u1eafp \u0111\u1eb7t. \u0110\u00f3 ch\u00ednh l\u00e0 c\u00e1ch d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1le c\u1ee7a ch\u00fang t\u00f4i t\u1ea1i OMCH ho\u1ea1t \u0111\u1ed9ng: b\u1ea3y d\u00f2ng r\u01a1le bao g\u1ed3m c\u1ea3 c\u00e1c lo\u1ea1i c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1eddi gian, v\u00e0 m\u1ed7i l\u1ef1a ch\u1ecdn \u0111\u1ec1u \u0111\u01b0\u1ee3c kh\u1edbp theo t\u1eebng m\u1eabu s\u1ea3n ph\u1ea9m, k\u00e8m theo b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi b\u1ea1n x\u00e1c nh\u1eadn \u0111\u01a1n h\u00e0ng. Qu\u00e9t <a href=\"https:\/\/www.omch.com\/vi\/relay\/\">d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1le c\u1ee7a ch\u00fang t\u00f4i<\/a> v\u00e0 h\u00e3y g\u1eedi cho ch\u00fang t\u00f4i th\u00f4ng tin tr\u00ean b\u1ea3ng t\u00ean s\u1ea3n ph\u1ea9m; ch\u00fang t\u00f4i s\u1ebd tr\u1ea3 l\u1eddi d\u1ef1a tr\u00ean b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean ph\u1ecfng \u0111o\u00e1n.<\/p>\n\n<h2>C\u00e1c th\u00f4ng s\u1ed1 c\u1ea7n ch\u1ec9 \u0111\u1ecbnh: Ch\u1ee9c n\u0103ng, \u0110i\u1ec7n \u00e1p, C\u01a1 ch\u1ebf k\u00edch ho\u1ea1t v\u00e0 C\u00e1ch l\u1eafp \u0111\u1eb7t<\/h2>\n\n<p>\u0110\u1eb7t h\u00e0ng t\u1eeb \u0111\u1ea7u thay v\u00ec l\u1ea5y t\u1eeb kho? M\u1ed9t b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt g\u1ed3m s\u00e1u d\u00f2ng s\u1ebd gi\u00fap nh\u1eadn \u0111\u01b0\u1ee3c b\u00e1o gi\u00e1 ch\u00ednh x\u00e1c ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean. M\u1ed7i d\u00f2ng tr\u1ed1ng \u0111\u1ec1u khi\u1ebfn nh\u00e0 cung c\u1ea5p ph\u1ea3i ph\u1ecfng \u0111o\u00e1n:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">B\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt g\u1ed3m s\u00e1u d\u00f2ng cho r\u01a1le tr\u1ec5 th\u1eddi gian<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Tham s\u1ed1<\/th><th>T\u1ea1i sao y\u1ebfu t\u1ed1 n\u00e0y l\u1ea1i quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi<\/th><th>N\u00ean di\u1ec5n \u0111\u1ea1t nh\u01b0 th\u1ebf n\u00e0o?<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi gian<\/td><td>N\u00f3 thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc k\u00edch ho\u1ea1t, \u0111\u1ea7u ra v\u00e0 \u0111\u1eb7t l\u1ea1i<\/td><td>H\u00e3y n\u00eau r\u00f5 ch\u1ee9c n\u0103ng v\u00e0 \u0111i\u1ec3m ti\u1ebfp x\u00fac \u1edf g\u00f3c ph\u1ea7n t\u01b0 m\u00e0 b\u1ea1n c\u1ea7n \u2014 v\u00ed d\u1ee5: \u201ctr\u1ec5 m\u1edf, ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf (NO) \u0111\u00f3ng theo th\u1eddi gian\u201d<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/td><td>M\u1ea1ch AC v\u00e0 m\u1ea1ch DC l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau<\/td><td>H\u00e3y n\u00eau r\u00f5 \u2014 \u201cAC 220 V\u201d ho\u1eb7c \u201cDC 24 V\u201d, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u201cb\u1ea5t k\u1ef3 gi\u00e1 tr\u1ecb n\u00e0o\u201d<\/td><\/tr>\n <tr><td>Lo\u1ea1i c\u01a1 ch\u1ebf k\u00edch ho\u1ea1t<\/td><td>M\u1ea1ch ti\u1ebfp \u0111i\u1ec3m kh\u00f4 v\u00e0 m\u1ea1ch k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n \u00e1p l\u00e0 hai m\u1ea1ch \u0111\u1ea7u v\u00e0o kh\u00e1c nhau<\/td><td>H\u00e3y ch\u1ec9 \u0111\u1ecbnh \u0111\u1ea7u v\u00e0o ti\u1ebfp \u0111i\u1ec3m kh\u00f4, tr\u1eeb khi m\u1eabu \u0111\u00f3 \u0111\u01b0\u1ee3c ghi l\u00e0 \u201ck\u00edch ho\u1ea1t b\u1eb1ng ngu\u1ed3n \u0111i\u1ec7n\u201d<\/td><\/tr>\n <tr><td>Kho\u1ea3ng th\u1eddi gian v\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u00e0i \u0111\u1eb7t<\/td><td>Lo\u1ea1i c\u1ed1 \u0111\u1ecbnh, n\u00fam v\u1eb7n ho\u1eb7c DIP quy\u1ebft \u0111\u1ecbnh c\u00e1ch th\u1ee9c \u0111i\u1ec1u ch\u1ec9nh trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh<\/td><td>H\u00e3y n\u00eau kho\u1ea3ng gi\u00e1 tr\u1ecb c\u1ea7n thi\u1ebft, ch\u1ee9 kh\u00f4ng ch\u1ec9 m\u1ed9t gi\u00e1 tr\u1ecb duy nh\u1ea5t<\/td><\/tr>\n <tr><td>C\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 s\u01a1 \u0111\u1ed3 ch\u00e2n c\u1eafm<\/td><td>\u1ed4 c\u1eafm 8 ch\u00e2n v\u00e0 11 ch\u00e2n, thanh DIN, b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/td><td>Ph\u00f9 h\u1ee3p v\u1edbi n\u1ec1n hi\u1ec7n c\u00f3 ho\u1eb7c l\u1eadp d\u1ef1 to\u00e1n cho vi\u1ec7c thay \u0111\u1ed5i n\u1ec1n<\/td><\/tr>\n <tr><td>\u0110\u1ed9 ch\u00ednh x\u00e1c khi l\u1eb7p l\u1ea1i<\/td><td>N\u00f3 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 m\u00e0 qu\u00e1 tr\u00ecnh ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng<\/td><td>Lo\u1ea1i \u00b10,1% d\u00e0nh cho c\u00e1c quy tr\u00ecnh \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao; lo\u1ea1i \u00b110% ch\u1ec9 \u00e1p d\u1ee5ng n\u1ebfu b\u1ea1n th\u1ef1c s\u1ef1 kh\u00f4ng quan t\u00e2m<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>H\u00e0ng k\u00edch ho\u1ea1t ch\u00ednh l\u00e0 n\u01a1i c\u00e1c r\u01a1le th\u1ef1c s\u1ef1 b\u1ecb h\u1ecfng trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf, v\u00ec v\u1eady n\u00f3 c\u00f3 c\u1ea3nh b\u00e1o ri\u00eang nh\u01b0 sau:<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <span class=\"rich-callout-ico\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg>\n <\/span>\n <div class=\"rich-callout-body\"><p>M\u1ed9t r\u01a1le \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 k\u00edch ho\u1ea1t b\u1eb1ng ti\u1ebfp \u0111i\u1ec3m kh\u00f4 c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng n\u1ebfu c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c c\u1ea5p v\u00e0o c\u00e1c c\u1ef1c k\u00edch ho\u1ea1t c\u1ee7a n\u00f3. Ch\u1ec9 nh\u1eefng m\u1eabu \u0111\u01b0\u1ee3c ghi r\u00f5 l\u00e0 \u201ck\u00edch ho\u1ea1t b\u1eb1ng ngu\u1ed3n\u201d m\u1edbi cho ph\u00e9p c\u00f3 \u0111i\u1ec7n \u00e1p t\u1ea1i c\u00e1c c\u1ef1c n\u00e0y. N\u1ebfu t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ea1n l\u00e0 \u0111i\u1ec7n \u00e1p c\u00f3 d\u00f2ng \u0111i\u1ec7n thay v\u00ec ti\u1ebfp \u0111i\u1ec3m, vui l\u00f2ng n\u00eau r\u00f5 \u0111i\u1ec1u n\u00e0y trong y\u00eau c\u1ea7u.<\/p><\/div>\n<\/div>\n\n<p>Ch\u1ec9 c\u1ea7n m\u1ed9t c\u00e2u l\u00e0 \u0111\u1ee7 \u0111\u1ec3 gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao c\u00e1c m\u1eabu c\u00f4ng t\u1eafc DIP \u0111a ch\u1ee9c n\u0103ng l\u1ea1i x\u1ee9ng \u0111\u00e1ng v\u1edbi m\u1ee9c gi\u00e1 cao h\u01a1n. Ch\u1ec9 m\u1ed9t m\u1eabu duy nh\u1ea5t c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9 tr\u1ec5 b\u1eadt, tr\u1ec5 t\u1eaft, \u0111\u1ecbnh k\u1ef3 v\u00e0 m\u1ed9t l\u1ea7n k\u00edch ho\u1ea1t \u0111\u00e3 thay th\u1ebf \u0111\u01b0\u1ee3c b\u1ed1n m\u00e3 s\u1ea3n ph\u1ea9m trong ng\u0103n k\u00e9o c\u1ee7a b\u1ea1n. C\u00e0i \u0111\u1eb7t m\u00e3, c\u00e0i \u0111\u1eb7t th\u1eddi gian, th\u1ebf l\u00e0 xong.<\/p>\n\n\n<div class=\"bp-cta-mid bd-reveal\">\n <p class=\"bp-cta-mid-ttl\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect width=\"8\" height=\"4\" x=\"8\" y=\"2\" rx=\"1\" ry=\"1\"\/><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"\/><path d=\"m9 14 2 2 4-4\"\/><\/svg><\/span>H\u00e3y bi\u1ebfn s\u00e1u d\u00f2ng c\u1ee7a b\u1ea1n th\u00e0nh m\u00f4 h\u00ecnh ph\u00f9 h\u1ee3p<\/p>\n <p class=\"bp-cta-mid-copy\">H\u00e3y g\u1eedi cho ch\u00fang t\u00f4i b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a qu\u00fd kh\u00e1ch \u2014 ch\u1ee9c n\u0103ng, \u0111i\u1ec7n \u00e1p, t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, ph\u1ea1m vi, \u0111\u1ebf, \u0111\u1ed9 ch\u00ednh x\u00e1c \u2014 v\u00e0 ch\u00fang t\u00f4i s\u1ebd ph\u1ea3n h\u1ed3i v\u1edbi m\u1eabu s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p c\u00f9ng b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3, \u0111\u1ec3 qu\u00fd kh\u00e1ch c\u00f3 th\u1ec3 x\u00e1c nh\u1eadn lo\u1ea1i r\u01a1le tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/p>\n <a class=\"bp-cta-mid-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt b\u1ed9 chuy\u1ec3n m\u1ea1ch c\u1ee7a t\u00f4i<svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>G\u00f3c nh\u00ecn c\u1ee7a nh\u00e0 ph\u00e2n ph\u1ed1i: N\u00ean d\u1ef1 tr\u1eef nh\u1eefng m\u1eb7t h\u00e0ng n\u00e0o v\u00e0 n\u00ean y\u00eau c\u1ea7u nh\u1eefng g\u00ec trong m\u1ed7i b\u00e1o gi\u00e1 thay th\u1ebf<\/h2>\n\n<p>N\u1ebfu b\u1ea1n b\u00e1n c\u00e1c linh ki\u1ec7n n\u00e0y thay v\u00ec b\u1ea3o tr\u00ec ch\u00fang, t\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u n\u00eau tr\u00ean s\u1ebd \u0111\u01b0\u1ee3c t\u00f3m g\u1ecdn th\u00e0nh m\u1ed9t nguy\u00ean t\u1eafc v\u1eadn h\u00e0nh duy nh\u1ea5t: <strong>B\u1ea1n \u0111ang b\u00e1n tr\u1ea3i nghi\u1ec7m, ch\u1ee9 kh\u00f4ng ph\u1ea3i ph\u1ea7n c\u1ee9ng.<\/strong> M\u1ed7i y\u00eau c\u1ea7u thay th\u1ebf \u0111\u1ec1u l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u00e1ch x\u1eed l\u00fd, ch\u1ec9 \u0111\u01b0\u1ee3c \u201cng\u1ee5y trang\u201d d\u01b0\u1edbi h\u00ecnh th\u1ee9c m\u00e3 s\u1ea3n ph\u1ea9m.<\/p>\n\n<p>H\u00e3y bi\u1ebfn b\u1ed1n c\u00e2u h\u1ecfi n\u00e0y th\u00e0nh th\u00f3i quen.<\/p>\n\n\n<div class=\"bp-2-ask bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m11 17-5-5 5-5\"\/><path d=\"m18 17-5-5 5-5\"\/><\/svg><\/span>B\u1ed1n c\u00e2u h\u1ecfi c\u1ea7n \u0111\u1eb7t ra tr\u01b0\u1edbc khi nh\u1eadn b\u1ea5t k\u1ef3 b\u00e1o gi\u00e1 thay th\u1ebf n\u00e0o<\/p>\n <div class=\"bp-2-grid\">\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">1<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">Ch\u1ee9c n\u0103ng n\u00e0o \u2014 \u0111\u1ed9 tr\u1ec5 b\u1eadt hay \u0111\u1ed9 tr\u1ec5 t\u1eaft?<\/p><p class=\"bp-2-line\">M\u1ed7i c\u00e1i ph\u1ea3n \u1ee9ng v\u1edbi m\u1ed9t t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t kh\u00e1c nhau; n\u1ebfu k\u1ebft h\u1ee3p sai, logic s\u1ebd b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">2<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">D\u1eef li\u1ec7u \u0111\u1ea7u ra c\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c duy tr\u00ec sau khi m\u1ea5t \u0111i\u1ec7n kh\u00f4ng?<\/p><p class=\"bp-2-line\">Ch\u1ec9 c\u00f3 lo\u1ea1i c\u00f3 th\u1eddi gian tr\u00ec ho\u00e3n t\u1eaft ho\u00e0n to\u00e0n ho\u1eb7c lo\u1ea1i l\u01b0u tr\u1eef m\u1edbi duy tr\u00ec \u0111\u01b0\u1ee3c th\u1eddi gian khi m\u1ea5t ngu\u1ed3n.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">3<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">\u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n n\u00e0o?<\/p><p class=\"bp-2-line\">AC v\u00e0 DC l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau, v\u00e0 c\u00e1c c\u1ea5p \u0111i\u1ec7n \u00e1p c\u0169ng v\u1eady.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">4<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">Lo\u1ea1i ch\u00e2n c\u1eafm n\u00e0o \u2014 8 ch\u00e2n, 11 ch\u00e2n hay DIN?<\/p><p class=\"bp-2-line\">Trung t\u00e2m s\u1ebd quy\u1ebft \u0111\u1ecbnh \u0111\u00e2y l\u00e0 c\u00f4ng vi\u1ec7c thay th\u1ebf hay c\u00f4ng vi\u1ec7c n\u1ed1i l\u1ea1i d\u00e2y.<\/p><\/div><\/div>\n <\/div>\n<\/div>\n\n<p>C\u00e2u h\u1ecfi th\u1ee9 hai l\u00e0 \u0111i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t b\u1ea1n v\u1edbi m\u1ed9t nh\u00e0 cung c\u1ea5p ch\u1ec9 quan t\u00e2m \u0111\u1ebfn gi\u00e1 c\u1ea3. Hai thi\u1ebft k\u1ebf c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau khi m\u1ea5t ngu\u1ed3n, do \u0111\u00f3, m\u1ed9t gi\u1ea3i ph\u00e1p c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft m\u00e0 kh\u00f4ng k\u00e8m theo gi\u1ea3i ph\u00e1p x\u1eed l\u00fd tr\u01b0\u1eddng h\u1ee3p m\u1ea5t ngu\u1ed3n th\u00ec ch\u01b0a th\u1ec3 coi l\u00e0 m\u1ed9t \u0111\u01a1n h\u00e0ng c\u00f3 th\u1ec3 b\u00e1n \u0111\u01b0\u1ee3c. Gi\u1ea3i ph\u00e1p sai s\u1ebd b\u1ecb tr\u1ea3 l\u1ea1i, ho\u1eb7c t\u1ec7 h\u01a1n, d\u1eabn \u0111\u1ebfn m\u1ed9t thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u0111\u00fang c\u00e1ch v\u00e0 g\u00e2y ra r\u1ee7i ro v\u1ec1 an to\u00e0n.<\/p>\n\n<p>D\u00f2ng \u0111i\u1ec7n n\u00e2ng c\u1ea5p ch\u00ednh l\u00e0 t\u00edn hi\u1ec7u nhu c\u1ea7u \u0111\u00e1ng tin c\u1eady nh\u1ea5t c\u1ee7a b\u1ea1n. M\u1ed7i x\u01b0\u1edfng v\u1eabn \u0111ang s\u1eed d\u1ee5ng b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ho\u1eb7c ch\u1ea1y b\u1eb1ng \u0111\u1ed9ng c\u01a1 tr\u00ean thi\u1ebft b\u1ecb c\u0169 \u0111\u1ec1u l\u00e0 m\u1ed9t c\u01a1 h\u1ed9i ti\u1ec1m n\u0103ng \u0111\u1ec3 nh\u1eadn y\u00eau c\u1ea7u thay th\u1ebf. Ph\u1ee5 t\u00f9ng OEM r\u1ea5t \u0111\u1eaft \u0111\u1ecf, v\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 hi\u1ec7u su\u1ea5t ch\u00ednh l\u00e0 v\u1ea5n \u0111\u1ec1 m\u00e0 b\u1ed1n c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n s\u1ebd gi\u1ea3i quy\u1ebft. Khi b\u1ea1n b\u00e1o gi\u00e1 cho vi\u1ec7c thay th\u1ebf \u0111\u00f3, vi\u1ec7c n\u00e2ng c\u1ea5p \u0111\u1ed9 ch\u00ednh x\u00e1c (t\u1eeb m\u1ee9c c\u00e0i \u0111\u1eb7t \u00b110% l\u00ean m\u1ee9c \u00b10,1%) v\u00e0 vi\u1ec7c lo\u1ea1i b\u1ecf vi\u1ec7c b\u1ea3o tr\u00ec van kim l\u00e0 nh\u1eefng l\u1ee3i \u00edch b\u00e1n th\u00eam ch\u00ednh \u0111\u00e1ng, kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng chi ti\u1ebft th\u1ed5i ph\u1ed3ng. Ch\u00fang xu\u1ea5t ph\u00e1t tr\u1ef1c ti\u1ebfp t\u1eeb nh\u1eefng kh\u00e1c bi\u1ec7t v\u1ec1 c\u01a1 ch\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n\n<p>Vi\u1ec7c s\u1eafp x\u1ebfp h\u00e0ng t\u1ed3n kho c\u0169ng tu\u00e2n theo logic t\u01b0\u01a1ng t\u1ef1. M\u1ed9t b\u1ed9 tr\u1ec5 b\u1eadt \u0111i\u1ec7n t\u1eed, m\u1ed9t b\u1ed9 tr\u1ec5 t\u1eaft \u0111i\u1ec7n t\u1eed v\u00e0 m\u1ed9t m\u1eabu DIP \u0111a ch\u1ee9c n\u0103ng n\u1eb1m gi\u1eefa hai lo\u1ea1i n\u00e0y c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng ph\u1ea7n l\u1edbn c\u00e1c y\u00eau c\u1ea7u tr\u00ean th\u1ecb tr\u01b0\u1eddng s\u1eeda ch\u1eefa. Thi\u1ebft b\u1ecb \u0111a ch\u1ee9c n\u0103ng n\u00e0y gi\u00fap g\u1ed9p b\u1ed1n khe ng\u0103n k\u00e9o th\u00e0nh m\u1ed9t SKU duy nh\u1ea5t. H\u00e3y s\u1eafp x\u1ebfp c\u00e1c ng\u0103n k\u00e9o theo t\u00ednh n\u0103ng ho\u1ea1t \u0111\u1ed9ng (ch\u1ee9c n\u0103ng v\u00e0 c\u00e1ch x\u1eed l\u00fd khi m\u1ea5t \u0111i\u1ec7n) thay v\u00ec d\u1ef1a tr\u00ean th\u01b0\u01a1ng hi\u1ec7u hay c\u00e1c nh\u00e3n hi\u1ec7u nh\u01b0 \u201ckh\u00ed n\u00e9n so v\u1edbi \u0111i\u1ec7n t\u1eed\u201d. Nh\u00e3n hi\u1ec7u ch\u1ec9 l\u00e0 chuy\u1ec7n c\u1ee7a qu\u00e1 kh\u1ee9; t\u00ednh n\u0103ng ho\u1ea1t \u0111\u1ed9ng m\u1edbi ch\u00ednh l\u00e0 s\u1ea3n ph\u1ea9m.<\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m22 2-7 20-4-9-9-4Z\"\/><path d=\"M22 2 11 13\"\/><\/svg><\/span>H\u00e3y d\u1ef1 tr\u1eef s\u1eb5n c\u00e1c r\u01a1le tr\u1ec5 th\u1eddi gian m\u00e0 kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n th\u1ef1c s\u1ef1 y\u00eau c\u1ea7u<\/p>\n <p class=\"bp-cta-end-sub\">B\u1ea3y d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1-le \u2014 bao g\u1ed3m c\u1ea3 lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng tr\u1ec5 th\u1eddi gian \u2014 m\u1ed7i s\u1ea3n ph\u1ea9m thay th\u1ebf \u0111\u1ec1u t\u01b0\u01a1ng th\u00edch v\u1ec1 m\u1eabu m\u00e3 v\u00e0 k\u00e8m theo b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi qu\u00fd kh\u00e1ch \u0111\u1eb7t h\u00e0ng, trong m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m m\u00e0 qu\u00fd kh\u00e1ch c\u00f3 th\u1ec3 t\u1eadp trung mua t\u1eeb m\u1ed9t nh\u00e0 cung c\u1ea5p duy nh\u1ea5t.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">H\u00e3y li\u00ean h\u1ec7 v\u1edbi OMCH \u0111\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 vi\u1ec7c cung c\u1ea5p thi\u1ebft b\u1ecb chuy\u1ec3n ti\u1ebfp<svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n<ol class=\"bd-refs\">\n<li><a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\" target=\"_blank\" rel=\"noopener\">Macromatic \u2014 Hi\u1ec3u v\u1ec1 c\u00e1c ch\u1ee9c n\u0103ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian<\/a>. 2026.<\/li>\n<li><a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\" target=\"_blank\" rel=\"noopener\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation \u2014 \u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a b\u1ed9 h\u1eb9n gi\u1edd 100-FPTA180 khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi r\u01a1le 700-CF<\/a>. 2020.<\/li>\n<li><a href=\"https:\/\/www.smcpneumatics.com\/airtimer.html\" target=\"_blank\" rel=\"noopener\">SMC Pneumatics \u2014 B\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n \/ R\u01a1le tr\u1ec5 th\u1eddi gian<\/a>.<\/li>\n<li><a href=\"https:\/\/www.allaboutcircuits.com\/textbook\/digital\/chpt-5\/time-delay-relays\/\" target=\"_blank\" rel=\"noopener\">All About Circuits \u2014 R\u01a1le tr\u1ec5 th\u1eddi gian, S\u00e1ch gi\u00e1o khoa k\u1ef9 thu\u1eadt s\u1ed1 Ch\u01b0\u01a1ng 5<\/a>.<\/li>\n<li><a href=\"https:\/\/forumautomation.com\/t\/plc-mechanical-timing-relays\/3220\" target=\"_blank\" rel=\"noopener\">ForumAutomation \u2014 R\u01a1le h\u1eb9n gi\u1edd c\u01a1 h\u1ecdc cho PLC<\/a>.<\/li>\n<li><a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\" target=\"_blank\" rel=\"noopener\">r\/engineering \u2014 So s\u00e1nh gi\u1eefa c\u00f4ng t\u1eafc h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 r\u01a1le h\u1eb9n gi\u1edd \u0111i\u1ec1u khi\u1ec3n c\u00f4ng t\u1eafc<\/a>. 2018.<\/li>\n<li><a href=\"https:\/\/www.reddit.com\/r\/ElectricalEngineering\/comments\/1v3mojz\/question_about_offdelay_timer_operation_after\/\" target=\"_blank\" rel=\"noopener\">r\/ElectricalEngineering \u2014 C\u00e2u h\u1ecfi v\u1ec1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le h\u1eb9n gi\u1edd tr\u1ec5 t\u1eaft sau khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n<\/a>. 2026.<\/li>\n<li><a href=\"https:\/\/www.omch.com\/vi\/relay\/\" target=\"_blank\" rel=\"noopener\">OMCH \u2014 R\u01a1le, b\u1ea3y d\u00f2ng s\u1ea3n ph\u1ea9m<\/a>.<\/li>\n<li><a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_blank\" rel=\"noopener\">OMCH \u2014 Nh\u00e0 cung c\u1ea5p linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p<\/a>.<\/li>\n<\/ol>\n\n <\/article>\n<\/div>\n\n<\/body><\/html>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u0103m ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n. H\u00e3y h\u1ecfi n\u0103m ngu\u1ed3n th\u00f4ng tin kh\u00e1c nhau v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c n\u0103m c\u00e2u tr\u1ea3 l\u1eddi kh\u00e1c nhau. Kh\u00f4ng ph\u1ea3i v\u00ec h\u1ecd b\u1ea5t \u0111\u1ed3ng quan \u0111i\u1ec3m, m\u00e0 b\u1edfi v\u00ec h\u1ea7u h\u1ebft c\u00e1c l\u1eddi gi\u1ea3i th\u00edch \u0111\u1ec1u nh\u1ea7m l\u1eabn gi\u1eefa hai c\u00e2u h\u1ecfi ri\u00eang bi\u1ec7t: c\u00e1ch th\u1ee9c t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, v\u00e0 c\u00e1ch th\u1ee9c [\u2026]<\/p>","protected":false},"author":4,"featured_media":12243,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Time Delay Relay Working Principle: Types & Timing","_seopress_titles_desc":"Learn how time delay relays work, including on-delay, off-delay and interval timing, with wiring, testing and replacement guidance.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12240"}],"version-history":[{"count":2,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240\/revisions"}],"predecessor-version":[{"id":12245,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240\/revisions\/12245"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12243"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":12240,"date":"2026-09-10T02:40:50","date_gmt":"2026-09-10T02:40:50","guid":{"rendered":"https:\/\/www.omch.com\/?p=12240"},"modified":"2026-09-10T02:41:49","modified_gmt":"2026-09-10T02:41:49","slug":"time-delay-relay-working-principle","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/time-delay-relay-working-principle\/","title":{"rendered":"Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1-le tr\u1ec5 th\u1eddi gian: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u0103m ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n"},"content":{"rendered":"\n\n \n \n Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1-le tr\u1ec5 th\u1eddi gian: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u0103m ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n<\/title>\n<\/head>\n<body>\n\n<div class=\"bd-post\">\n <style>\n\/* fonts: BLOG scope only \u2014 copied verbatim from the brand Standard Blog CSS Header. *\/\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Manrope:wght@400;600;700&family=Roboto:wght@600;700&display=swap');\n\n.bd-post {\n \/* ---- color tokens: OMCH v4 palette (plan palette \u2014 single source of hex) ---- *\/\n --body-bg: #FFFFFF;\n --text-primary: #333333;\n --text-secondary: #6E6E6E;\n --heading-ink: #000000;\n --accent: #479DE2;\n --accent-text: #2A76B4;\n --accent-hot: #FD9649;\n --navy: #0D3972;\n --inverse-bg: #1E1E1E;\n --inverse-text: #FFFFFF;\n --inverse-text-secondary: #B0B0B0;\n --card-fill: #F4F8FC;\n --card-border: #E0E0E0;\n --divider: #C0C0C0;\n --panel-fill: #FAFAFA;\n --btn-white: #FFFFFF;\n --btn-ink: #1E1E1E;\n \/* ---- layout ---- *\/\n --prose-width: 720px;\n --gap-attach: 16px;\n --gap-normal: 32px;\n --gap-section: 48px;\n --pad-standard: 24px;\n\n font-family: \"Manrope\", sans-serif;\n font-size: 16px;\n font-weight: 400;\n line-height: 1.6;\n color: var(--text-primary);\n background: var(--body-bg);\n padding: 40px;\n max-width: 100%;\n box-sizing: border-box;\n}\n.bd-post a { overflow-wrap: anywhere; 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}\n.bd-post .bp-2-cell { display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px; }\n.bd-post .bp-2-cell:nth-child(even) { border-left: 1px solid var(--divider); padding-left: 20px; }\n.bd-post .bp-2-cell:nth-child(n+3) { border-top: 1px solid var(--divider); padding-top: 16px; }\n.bd-post .bp-2-chip {\n display: inline-flex; align-items: center; justify-content: center;\n width: 28px; height: 28px; flex: none;\n background: var(--accent-text); color: var(--inverse-text);\n font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 15px;\n border-radius: 6px;\n}\n.bd-post .bp-2-cell-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }\n.bd-post .bp-2-label { font-family: \"Roboto\", sans-serif; font-weight: 700; font-size: 16px; color: var(--heading-ink); margin: 0; }\n.bd-post .bp-2-line { font-size: 14px; color: var(--text-secondary); margin: 0; }\n\n.bd-post .bp-cta-end {\n background: var(--navy);\n border-radius: 10px;\n padding: var(--pad-standard);\n margin: var(--gap-section) 0;\n display: flex; flex-direction: column; gap: 10px; align-items: flex-start;\n}\n.bd-post .bp-cta-end-ttl { display: block; font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 22px; line-height: 1.3; color: var(--inverse-text); margin: 0; }\n.bd-post .bp-cta-end-ttl .rich-ico { display: inline-flex; vertical-align: -0.2em; margin-right: 8px; color: var(--accent-hot); width: 22px; height: 22px; }\n.bd-post .bp-cta-end-sub { font-size: 16px; color: var(--inverse-text-secondary); margin: 0; max-width: 34em; }\n.bd-post .bp-cta-end-btn {\n display: inline-flex; align-items: center; gap: 8px;\n background: var(--accent-hot); color: var(--btn-ink);\n font-family: \"Roboto\", sans-serif; font-weight: 600; font-size: 15px;\n text-decoration: none; padding: 10px 20px; border-radius: 6px;\n}\n\n\/* ---- References (canonical .bd-refs) ---- *\/\n.bd-post .bd-refs { margin: 0 0 1em; padding-left: 1.6em; }\n.bd-post .bd-refs li { font-size: 14px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 10px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li::marker { color: var(--accent-text); }\n.bd-post .bd-refs li a { color: var(--accent-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }\n.bd-post .bd-refs li a:hover { color: var(--heading-ink); }\n\n\/* ---- sanctioned motion ---- *\/\n@media (prefers-reduced-motion: no-preference) {\n @supports (animation-timeline: view()) {\n .bd-post .bd-reveal { animation: bd-fade-in linear both; animation-timeline: view(); animation-range: entry 0% entry 35%; }\n @keyframes bd-fade-in { from { opacity: 0; } to { opacity: 1; } }\n }\n .bd-post .rich-card, .bd-post .rich-callout, .bd-post .rich-table-wrap, .bd-post .bp-2-ask { transition: transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .rich-card:hover, .bd-post .rich-callout:hover, .bd-post .rich-table-wrap:hover, .bd-post .bp-2-ask:hover { transform: translateY(-2px); box-shadow: 0 6px 18px rgba(0,0,0,0.08); }\n .bd-post .bp-cta-mid-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-mid-btn:hover { background: var(--accent-text); color: var(--btn-white); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.18); }\n .bd-post .bp-cta-end-btn { transition: background .2s ease-out, color .2s ease-out, transform .2s ease-out, box-shadow .2s ease-out; }\n .bd-post .bp-cta-end-btn:hover { background: var(--btn-white); color: var(--btn-ink); transform: translateY(-2px); box-shadow: 0 4px 14px rgba(0,0,0,0.25); }\n .bd-post .bd-post-article a { transition: color .2s ease-out, text-decoration-color .2s ease-out; }\n}\n\n@media (max-width: 768px) {\n .bd-post { padding: 16px; }\n .bd-post h1 { font-size: 22px; }\n .bd-post h2 { font-size: 26px; margin-top: 32px; }\n .bd-post h3 { font-size: 20px; margin-top: 24px; }\n .bd-post .bp-1-hook { flex-direction: column; }\n .bd-post .bp-2-grid { grid-template-columns: 1fr; }\n .bd-post .bp-2-cell:nth-child(even) { border-left: 0; padding-left: 16px; }\n .bd-post .bp-2-cell + .bp-2-cell { border-top: 1px solid var(--divider); padding-top: 16px; padding-left: 16px; }\n .bd-post .rich-table th { white-space: normal; }\n}\n <\/style>\n <article class=\"bd-post-article\">\n\n<p>H\u00e3y h\u1ecfi n\u0103m ngu\u1ed3n th\u00f4ng tin kh\u00e1c nhau v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c n\u0103m c\u00e2u tr\u1ea3 l\u1eddi kh\u00e1c nhau. Kh\u00f4ng ph\u1ea3i v\u00ec h\u1ecd kh\u00f4ng \u0111\u1ed3ng \u00fd v\u1edbi nhau, m\u00e0 v\u00ec h\u1ea7u h\u1ebft c\u00e1c l\u1eddi gi\u1ea3i th\u00edch \u0111\u1ec1u nh\u1ea7m l\u1eabn gi\u1eefa hai v\u1ea5n \u0111\u1ec1 ri\u00eang bi\u1ec7t: <em>c\u01a1 ch\u1ebf v\u1eadt l\u00fd t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 nh\u01b0 th\u1ebf n\u00e0o<\/em>, v\u00e0 <em>R\u01a1le ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o trong khi ch\u1edd \u0111\u1ee3i<\/em>. Th\u1ee9 nh\u1ea5t l\u00e0 l\u1ecbch s\u1eed ph\u1ea7n c\u1ee9ng. Th\u1ee9 hai quy\u1ebft \u0111\u1ecbnh li\u1ec7u m\u00e1y c\u1ee7a b\u1ea1n c\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch v\u00e0o \u0111\u00fang th\u1eddi \u0111i\u1ec3m hay kh\u00f4ng. B\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u1ea3 hai kh\u00eda c\u1ea1nh, sau \u0111\u00f3 t\u1eadp trung ch\u1ee7 y\u1ebfu v\u00e0o v\u1ea5n \u0111\u1ec1 ho\u1ea1t \u0111\u1ed9ng, b\u1edfi v\u00ec \u0111\u00f3 ch\u00ednh l\u00e0 nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1 d\u1eabn \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 trong qu\u00e1 tr\u00ecnh s\u1eed d\u1ee5ng, nh\u1eefng sai l\u1ea7m khi thay th\u1ebf v\u00e0 c\u00e1c tr\u01b0\u1eddng h\u1ee3p tr\u1ea3 h\u00e0ng t\u1ed1n k\u00e9m.<\/p>\n\n <img decoding=\"async\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2026\/09\/Time-Delay-Relay.webp\" style=\"width: 512px; height: 384px; max-width: 100%; object-fit: cover; border-radius: 12px; margin: 30px auto; display: block; box-shadow: 10px 10px 60px 0px rgba(210, 221, 224, 0.35); transition: all 0.3s ease; cursor: pointer;\" onmouseover=\"this.style.transform='translateY(-5px) scale(1.03)'; this.style.boxShadow='15px 25px 80px 0px rgba(210, 221, 224, 0.45)'\" onmouseout=\"this.style.transform='translateY(0) scale(1)'; this.style.boxShadow='10px 10px 60px 0px rgba(210, 221, 224, 0.35)'\"> \n\n<h2>R\u01a1le tr\u1ec5 th\u1eddi gian l\u00e0 g\u00ec \u2014 v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a \u201cth\u1eddi gian tr\u1ec5\u201d l\u00e0 g\u00ec?<\/h2>\n\n<p>R\u01a1le tr\u1ec5 th\u1eddi gian l\u00e0 m\u1ed9t lo\u1ea1i r\u01a1le \u0111i\u1ec1u khi\u1ec3n c\u00f3 b\u1ed9 h\u1eb9n gi\u1edd \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t gi\u1eefa cu\u1ed9n d\u00e2y v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3. M\u1ed9t r\u01a1le ti\u00eau chu\u1ea9n s\u1ebd chuy\u1ec3n \u0111\u1ed5i tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m ngay l\u1eadp t\u1ee9c khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n ho\u1eb7c ng\u1eaft \u0111i\u1ec7n. R\u01a1le tr\u1ec5 th\u1eddi gian th\u00ec kh\u00f4ng. C\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3 s\u1ebd duy tr\u00ec tr\u1ea1ng th\u00e1i hi\u1ec7n t\u1ea1i cho \u0111\u1ebfn khi \u0111\u00e1p \u1ee9ng m\u1ed9t \u0111i\u1ec1u ki\u1ec7n th\u1eddi gian: th\u1eddi gian c\u00e0i \u0111\u1eb7t tr\u00f4i qua, t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t xu\u1ea5t hi\u1ec7n, ho\u1eb7c l\u1ec7nh \u0111\u1eb7t l\u1ea1i k\u1ebft th\u00fac chu k\u1ef3. H\u00e3y ph\u00e2n t\u00edch n\u00f3 \u0111\u1ebfn m\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t. A <strong>d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o \u0111i\u1ec1u khi\u1ec3n<\/strong> (cu\u1ed9n d\u00e2y ho\u1eb7c c\u00e1c c\u1ef1c ngu\u1ed3n) cung c\u1ea5p n\u0103ng l\u01b0\u1ee3ng v\u00e0 t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian. A <strong>giai \u0111o\u1ea1n x\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m<\/strong> \u0111\u1ebfm ng\u01b0\u1ee3c th\u1eddi gian tr\u1ec5 c\u1ee7a b\u1ed9. M\u1ed9t <strong>r\u01a1le \u0111\u1ea7u ra<\/strong> th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng chuy\u1ec3n m\u1ea1ch, th\u01b0\u1eddng c\u00f3 c\u00e1c ti\u1ebfp \u0111i\u1ec3m NO, NC ho\u1eb7c c\u1ea3 hai.<\/p>\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 h\u00e0nh vi quan tr\u1ecdng nh\u1ea5t tr\u01b0\u1edbc ti\u00ean l\u00e0 <em>h\u01b0\u1edbng d\u1eabn<\/em> v\u1ec1 s\u1ef1 ch\u1eadm tr\u1ec5. <strong>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/strong> (c\u00f2n g\u1ecdi l\u00e0 \u0111\u1ed9 tr\u1ec5 khi k\u00edch ho\u1ea1t ho\u1eb7c \u0111\u1ed9 tr\u1ec5 khi v\u1eadn h\u00e0nh): khi c\u1ea5p ngu\u1ed3n, b\u1ed9 h\u1eb9n gi\u1edd b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m ch\u1ec9 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i sau khi h\u1ebft th\u1eddi gian c\u00e0i \u0111\u1eb7t. Khi ng\u1eaft \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n, chu k\u1ef3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i. <strong>Th\u1eddi gian tr\u1ec5 m\u1edf<\/strong> (tr\u00ec ho\u00e3n khi ng\u1eaft ho\u1eb7c tr\u00ec ho\u00e3n khi th\u1ea3): \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n trong khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t c\u00f2n t\u1ed3n t\u1ea1i. Khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t bi\u1ebfn m\u1ea5t, b\u1ed9 h\u1eb9n gi\u1edd m\u1edbi b\u1eaft \u0111\u1ea7u ch\u1ea1y; \u0111\u1ea7u ra s\u1ebd ng\u1eaft khi h\u1ebft th\u1eddi gian.<\/p>\n\n<p>T\u1ea1i sao l\u1ea1i ph\u1ea3i l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb n\u00e0y? Vi\u1ec7c kh\u1edfi \u0111\u1ed9ng c\u00e1c \u0111\u1ed9ng c\u01a1 theo th\u1ee9 t\u1ef1 gi\u00fap tr\u00e1nh t\u00ecnh tr\u1ea1ng t\u1ea5t c\u1ea3 c\u00f9ng ti\u00eau th\u1ee5 d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng c\u00f9ng m\u1ed9t l\u00fac. Vi\u1ec7c duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng c\u1ee7a qu\u1ea1t l\u00e0m m\u00e1t ho\u1eb7c b\u0103ng t\u1ea3i sau khi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng c\u1ee7a ch\u00fang ng\u1eebng ho\u1ea1t \u0111\u1ed9ng s\u1ebd t\u1ea1o th\u1eddi gian \u0111\u1ec3 nhi\u1ec7t t\u1ea3n \u0111i. Vi\u1ec7c th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc x\u1ea3 kh\u00ed ho\u1eb7c b\u00f4i tr\u01a1n s\u01a1 b\u1ed9 theo th\u1ee9 t\u1ef1 s\u1ebd b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb tr\u01b0\u1edbc khi n\u00f3 b\u1eaft \u0111\u1ea7u ho\u1ea1t \u0111\u1ed9ng. M\u1ed7i t\u00e1c v\u1ee5 trong s\u1ed1 \u0111\u00f3 \u0111\u1ec1u thu\u1ed9c lo\u1ea1i \u201cchuy\u1ec3n \u0111\u1ed5i m\u1ed9t th\u1ee9 g\u00ec \u0111\u00f3, nh\u01b0ng ch\u01b0a ph\u1ea3i l\u00fac n\u00e0y\u201d, v\u00e0 \u0111\u00f3 ch\u00ednh l\u00e0 l\u00fd do t\u1ed3n t\u1ea1i c\u1ee7a b\u1ed9 ph\u1eadn n\u00e0y.<\/p>\n\n<p>M\u1ed9t l\u01b0u \u00fd v\u1ec1 ph\u1ea1m vi: b\u00e0i vi\u1ebft n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c r\u01a1le tr\u1ec5 th\u1eddi gian trong c\u00e1c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n. Kh\u00ed n\u00e9n <em>b\u1ed9 h\u1eb9n gi\u1edd kh\u00f4ng kh\u00ed<\/em> C\u00e1c thi\u1ebft b\u1ecb l\u00e0m tr\u1ec5 t\u00edn hi\u1ec7u kh\u00f4ng d\u00e2y thu\u1ed9c m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m ri\u00eang bi\u1ec7t, v\u00e0 c\u00e1c m\u00f4-\u0111un l\u00e0m tr\u1ec5 12 V d\u00e0nh cho \u00f4 t\u00f4 tu\u00e2n theo c\u00f9ng m\u1ed9t nguy\u00ean l\u00fd v\u1eadt l\u00fd nh\u01b0ng trong m\u1ed9t b\u1ed1i c\u1ea3nh kh\u00e1c. C\u00e1c nguy\u00ean t\u1eafc d\u01b0\u1edbi \u0111\u00e2y \u00e1p d\u1ee5ng chung cho t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y; tuy nhi\u00ean, chi ti\u1ebft v\u1ec1 c\u00e1ch \u0111\u1ea5u d\u00e2y th\u00ec kh\u00f4ng.<\/p>\n\n<h2>C\u00e1ch th\u1ee9c th\u1ef1c hi\u1ec7n s\u1ef1 ch\u1eadm tr\u1ec5: B\u1ed1n c\u01a1 ch\u1ebf \u0111i\u1ec1u khi\u1ec3n th\u1eddi gian<\/h2>\n\n<p>C\u01a1 ch\u1ebf \u201cch\u1edd, r\u1ed3i chuy\u1ec3n \u0111\u1ed5i\u201d n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c tri\u1ec3n khai theo b\u1ed1n c\u00e1ch kh\u00e1c nhau trong su\u1ed1t nhi\u1ec1u th\u1eadp k\u1ef7 qua, v\u00e0 c\u00e1c m\u00e1y m\u00f3c c\u0169 v\u1eabn c\u00f2n gi\u1eef nguy\u00ean c\u1ea3 b\u1ed1n c\u00e1ch \u0111\u00f3. Vi\u1ec7c nh\u1eadn di\u1ec7n c\u01a1 ch\u1ebf n\u00e0y s\u1ebd gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch b\u1ed9 h\u1eb9n gi\u1edd s\u1ebd ho\u1ea1t \u0111\u1ed9ng khi x\u1ea3y ra s\u1ef1 c\u1ed1.<\/p>\n\n<p><strong>B\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n<\/strong> Khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, m\u1ed9t \u1ed1ng th\u1ed5i \u0111\u1ed9c l\u1eadp s\u1ebd b\u1ecb n\u00e9n l\u1ea1i; kh\u00f4ng kh\u00ed tho\u00e1t ra qua l\u1ed7 van kim v\u1edbi t\u1ed1c \u0111\u1ed9 \u0111\u00e3 c\u00e0i \u0111\u1eb7t, v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m s\u1ebd ng\u1eaft khi \u00e1p su\u1ea5t b\u00ean trong v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng quy \u0111\u1ecbnh. Thi\u1ebft b\u1ecb n\u00e0y kh\u00f4ng c\u1ea7n ngu\u1ed3n cung c\u1ea5p kh\u00ed b\u00ean ngo\u00e0i; \u1ed1ng th\u1ed5i \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p s\u1eb5n. <strong>B\u1ed9 h\u1eb9n gi\u1edd cho \u0111\u1ed9ng c\u01a1 \u0111\u1ed3ng b\u1ed9<\/strong> \u0111i\u1ec1u khi\u1ec3n m\u1ed9t \u0111\u1ed9ng c\u01a1 c\u00f3 h\u1ed9p s\u1ed1 \u0111\u1ec3 di chuy\u1ec3n m\u1ed9t cam \u0111\u1ebfn v\u1ecb tr\u00ed \u0111\u00e3 \u0111\u1ecbnh. Th\u1eddi gian tr\u1ec5 ch\u00ednh x\u00e1c l\u00e0 th\u1eddi gian di chuy\u1ec3n c\u1ee7a cam, do \u0111\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 c\u1ee7a l\u01b0\u1edbi \u0111i\u1ec7n. <strong>B\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa (RC)<\/strong> S\u1ea1c t\u1ee5 \u0111i\u1ec7n qua m\u1ed9t \u0111i\u1ec7n tr\u1edf v\u00e0 k\u00edch ho\u1ea1t r\u01a1le \u0111\u1ea7u ra khi \u0111i\u1ec7n \u00e1p tr\u00ean t\u1ee5 \u0111i\u1ec7n v\u01b0\u1ee3t qua ng\u01b0\u1ee1ng c\u1ee7a b\u1ed9 so s\u00e1nh. S\u1ea3n ph\u1ea9m R \u00d7 C ch\u00ednh l\u00e0 \u0111\u1ed9 tr\u1ec5. <strong>B\u1ed9 h\u1eb9n gi\u1edd d\u1ef1a tr\u00ean vi x\u1eed l\u00fd<\/strong> \u0111\u1ebfm s\u1ed1 chu k\u1ef3 dao \u0111\u1ed9ng c\u1ee7a b\u1ed9 dao \u0111\u1ed9ng tinh th\u1ec3 v\u00e0 l\u00e0 ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i. Ch\u00fang c\u0169ng l\u00e0 n\u1ec1n t\u1ea3ng cho c\u00e1c m\u1eabu \u0111a ch\u1ee9c n\u0103ng, trong \u0111\u00f3 c\u00e1c c\u00f4ng t\u1eafc DIP \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi kh\u00e1c nhau.<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">B\u1ed1n c\u00e1ch \u0111\u1ec3 t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 \u2014 c\u01a1 ch\u1ebf, \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>C\u01a1 ch\u1ebf<\/th><th>S\u1ef1 ch\u1eadm tr\u1ec5 x\u1ea3y ra nh\u01b0 th\u1ebf n\u00e0o<\/th><th>\u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i \u0111i\u1ec3n h\u00ecnh<\/th><th>Sau khi m\u1ea5t \u0111i\u1ec7n<\/th><th>N\u01a1i b\u1ea1n g\u1eb7p n\u00f3<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Kh\u00ed n\u00e9n<\/td><td>Kh\u00f4ng kh\u00ed t\u1eeb \u1ed1ng th\u1ed5i tho\u00e1t ra qua van kim<\/td><td>\u00b110% so v\u1edbi th\u1eddi gian c\u00e0i \u0111\u1eb7t; c\u00e0i \u0111\u1eb7t 20 gi\u00e2y c\u00f3 th\u1ec3 k\u00edch ho\u1ea1t ng\u1eaft trong kho\u1ea3ng 18\u201322 gi\u00e2y (Rockwell 100-FPTA180)<\/td><td>C\u00f3 th\u1ec3 duy tr\u00ec tr\u1ea1ng th\u00e1i cu\u1ed1i c\u00f9ng trong m\u1ed9t th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng t\u00edch tr\u1eef trong \u1ed1ng bellow<\/td><td>C\u00e1c t\u1ea5m panel c\u0169, \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt ho\u1eb7c c\u00f3 \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t<\/td><\/tr>\n <tr><td>\u0110\u1ed9ng c\u01a1 \u0111\u1ed3ng b\u1ed9<\/td><td>\u0110\u1ed9ng c\u01a1 c\u00f3 h\u1ed9p s\u1ed1 \u0111i\u1ec1u khi\u1ec3n tr\u1ee5c cam di chuy\u1ec3n \u0111\u1ebfn m\u1ed9t g\u00f3c \u0111\u00e3 \u0111\u1ecbnh<\/td><td>Ho\u1ea1t \u0111\u1ed9ng theo t\u1ea7n s\u1ed1 \u0111\u01b0\u1eddng d\u00e2y; kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng tr\u00f4i t\u1ea7n s\u1ed1 khi ch\u1ea1y t\u1ef1 do<\/td><td>D\u1eebng ngay l\u1eadp t\u1ee9c; cam t\u1ef1 \u0111\u1ed9ng d\u1eebng ho\u1eb7c thi\u1ebft l\u1eadp l\u1ea1i theo thi\u1ebft k\u1ebf<\/td><td>N\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd \u0111\u1ed9ng c\u01a1, h\u1ec7 th\u1ed1ng HVAC c\u0169<\/td><\/tr>\n <tr><td>\u0110i\u1ec1u khi\u1ec3n t\u1eeb xa \u0111i\u1ec7n t\u1eed<\/td><td>T\u1ee5 \u0111i\u1ec7n t\u00edch \u0111i\u1ec7n qua m\u1ed9t \u0111i\u1ec7n tr\u1edf<\/td><td>C\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i; \u0111\u1ed9 b\u00e1m d\u00ednh gi\u1ea3m khi nhi\u1ec7t \u0111\u1ed9 t\u0103ng<\/td><td>T\u1eaft ngu\u1ed3n v\u00e0 kh\u1edfi \u0111\u1ed9ng l\u1ea1i g\u1ea7n nh\u01b0 ngay l\u1eadp t\u1ee9c<\/td><td>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n th\u1ebf h\u1ec7 gi\u1eefa, b\u1ed9 h\u1eb9n gi\u1edd ti\u1ebft ki\u1ec7m<\/td><\/tr>\n <tr><td>B\u1ed9 vi x\u1eed l\u00fd s\u1ed1<\/td><td>B\u1ed9 dao \u0111\u1ed9ng tinh th\u1ec3 \u0111\u1ebfm s\u1ed1 chu k\u1ef3<\/td><td>\u00b10,11 TP3T ho\u1eb7c t\u1ed1t h\u01a1n l\u00e0 th\u00f4ng s\u1ed1 ti\u00eau chu\u1ea9n trong t\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 cung c\u1ea5p<\/td><td>S\u1ebd ng\u1eaft k\u1ebft n\u1ed1i v\u00e0 thi\u1ebft l\u1eadp l\u1ea1i ngay l\u1eadp t\u1ee9c tr\u1eeb khi \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ea1ch l\u01b0u tr\u1eef<\/td><td>C\u00e1c t\u1ea5m pin m\u1edbi, c\u00e1c m\u1eabu \u0111a ch\u1ee9c n\u0103ng<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>C\u00f3 hai con s\u1ed1 \u0111\u00e1ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd \u1edf \u0111\u00e2y, v\u00e0 c\u1ea3 hai \u0111\u1ec1u d\u1ef1a tr\u00ean s\u1ed1 li\u1ec7u th\u1ef1c t\u1ebf ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 chi\u00eau th\u1ee9c ti\u1ebfp th\u1ecb. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng kh\u00ed n\u00e9n l\u00e0 <strong>\u00b110% so v\u1edbi th\u1eddi gian \u0111\u00e3 \u0111\u1eb7t<\/strong>. T\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn c\u1ee7a Rockwell d\u00e0nh cho b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n 100-FPTA180 n\u00eau r\u00f5: c\u00e0i \u0111\u1eb7t 20 gi\u00e2y c\u00f3 th\u1ec3 cho k\u1ebft qu\u1ea3 trong kho\u1ea3ng t\u1eeb 18 \u0111\u1ebfn 22 gi\u00e2y (<a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation<\/a>). T\u00e0i li\u1ec7u v\u1ec1 b\u1ed9 h\u1eb9n gi\u1edd kh\u00f4ng kh\u00ed c\u1ee7a SMC c\u0169ng n\u00eau m\u1ee9c \u0111\u1ed9 l\u1eb7p l\u1ea1i \u00b110% (<a href=\"https:\/\/www.smcpneumatics.com\/airtimer.html\">SMC Pneumatics<\/a>). C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd d\u1ef1a tr\u00ean vi x\u1eed l\u00fd \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i <strong>\u00b10,11 TP3T ho\u1eb7c t\u1ed1t h\u01a1n<\/strong> theo t\u00e0i li\u1ec7u c\u1ee7a nh\u00e0 cung c\u1ea5p (<a href=\"https:\/\/www.geya.net\/how-a-time-delay-relay-works\/\">GEYA<\/a>), \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n t\u1edbi hai b\u1eadc \u0111\u1ed9 l\u1edbn. N\u1ebfu m\u1ed9t quy tr\u00ecnh kh\u00f4ng th\u1ec3 duy tr\u00ec ho\u1ea1t \u0111\u1ed9ng trong kho\u1ea3ng 18\u201322 gi\u00e2y trong t\u1ed5ng th\u1eddi gian c\u00e0i \u0111\u1eb7t l\u00e0 20 gi\u00e2y, th\u00ec d\u00f9 c\u00f3 \u0111i\u1ec1u ch\u1ec9nh van kim th\u1ebf n\u00e0o \u0111i ch\u0103ng n\u1eefa c\u0169ng kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c. \u0110\u00f3 l\u00e0 s\u1ef1 thay \u0111\u1ed5i c\u01a1 ch\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh th\u00f4ng th\u01b0\u1eddng.<\/p>\n\n<p>Ranh gi\u1edbi n\u00e0y c\u0169ng c\u00f3 m\u1eb7t tr\u00e1i: h\u1ec7 th\u1ed1ng kh\u00ed n\u00e9n kh\u00f4ng \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c \u0111\u00e3 l\u1ed7i th\u1eddi. C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u1eabn ch\u1ee9ng t\u1ecf \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb c\u1ee7a m\u00ecnh. Ch\u00fang ph\u00f9 h\u1ee3p v\u1edbi nh\u1eefng n\u01a1i kh\u00f4ng c\u00f3 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n t\u1ea1i th\u1eddi \u0111i\u1ec3m h\u1eb9n gi\u1edd, nh\u1eefng m\u00f4i tr\u01b0\u1eddng kh\u00f4ng th\u00edch h\u1ee3p cho thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed, v\u00e0 c\u00e1c m\u1ea1ch \u0111i\u1ec7n m\u00e0 vi\u1ec7c gi\u1eef tr\u1ea1ng th\u00e1i c\u01a1 h\u1ecdc trong th\u1eddi gian ng\u1eafn sau khi m\u1ea5t \u0111i\u1ec7n l\u00e0 y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh. Ch\u00fang ch\u1ec9 l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a th\u1eddi \u0111\u1ea1i, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ea3n ph\u1ea9m l\u1ed7i.<\/p>\n\n<h2>B\u1ea3n \u0111\u1ed3 h\u00e0nh vi: N\u0103m ch\u1ee9c n\u0103ng th\u1eddi gian, G\u00f3c ti\u1ebfp x\u00fac v\u00e0 \u0110i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi ngu\u1ed3n \u0111i\u1ec7n b\u1ecb ng\u1eaft<\/h2>\n\n<p>C\u01a1 ch\u1ebf gi\u1ea3i th\u00edch c\u00e1ch th\u1ee9c t\u1ea1o ra \u0111\u1ed9 tr\u1ec5; c\u00f2n h\u00e0nh vi th\u00ec cho b\u1ea1n bi\u1ebft <em>khi c\u00e1c ti\u1ebfp \u0111i\u1ec3m chuy\u1ec3n \u0111\u1ed9ng<\/em>, ph\u1ea7n m\u00e0 b\u1ea1n s\u1ebd kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1, x\u00e1c \u0111\u1ecbnh th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 b\u00e1n h\u00e0ng. H\u00e3y ph\u00e2n t\u00edch b\u1ea5t k\u1ef3 h\u00e0m th\u1eddi gian n\u00e0o b\u1eb1ng c\u00e1ch \u0111\u1eb7t ba c\u00e2u h\u1ecfi sau: <strong>\u0110i\u1ec1u g\u00ec k\u00edch ho\u1ea1t qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian, \u0111\u1ea7u ra s\u1ebd ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o khi qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian k\u1ebft th\u00fac, v\u00e0 \u0111i\u1ec1u g\u00ec s\u1ebd thi\u1ebft l\u1eadp l\u1ea1i n\u00f3?<\/strong><\/p>\n\n<h3>N\u0103m ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi c\u01a1 b\u1ea3n<\/h3>\n\n<p><strong>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/strong> l\u00e0 lo\u1ea1i ph\u1ed5 bi\u1ebfn nh\u1ea5t. Khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n \u2192 qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2192 \u0111\u1ea7u ra \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t khi h\u1ebft th\u1eddi gian; ng\u1eaft \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n s\u1ebd \u0111\u1eb7t l\u1ea1i thi\u1ebft b\u1ecb. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 theo th\u1ee9 t\u1ef1 xen k\u1ebd, chuy\u1ec3n \u0111\u1ed5i ch\u1ebf \u0111\u1ed9 sao-tam gi\u00e1c, x\u1ea3 kh\u00ed \u0111\u1ea7u \u0111\u1ed1t tr\u01b0\u1edbc khi \u0111\u00e1nh l\u1eeda.<\/p>\n\n<p><strong>Th\u1eddi gian tr\u1ec5 m\u1edf<\/strong> l\u00e0 tr\u01b0\u1eddng h\u1ee3p th\u1ee9 hai. Khi \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n \u2192 r\u01a1le \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. Khi \u00e1p d\u1ee5ng t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2192 \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n ngay l\u1eadp t\u1ee9c. Khi ng\u1eaft t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2192 qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2192 \u0111\u1ea7u ra ng\u1eebng c\u1ea5p \u0111i\u1ec7n khi h\u1ebft th\u1eddi gian. Vi\u1ec7c \u00e1p d\u1ee5ng l\u1ea1i t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t trong qu\u00e1 tr\u00ecnh \u0111\u1ebfm th\u1eddi gian s\u1ebd \u0111\u1eb7t l\u1ea1i gi\u00e1 tr\u1ecb \u0111\u1ebfm v\u00e0 duy tr\u00ec \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh: qu\u1ea1t ph\u1ea3i ti\u1ebfp t\u1ee5c ch\u1ea1y sau khi \u0111\u1ed9ng c\u01a1 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, c\u1eeda \u0111\u01b0\u1ee3c gi\u1eef m\u1edf b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd.<\/p>\n\n<p><strong>Kho\u1ea3ng th\u1eddi gian b\u1eadt<\/strong> k\u00edch ho\u1ea1t \u0111\u1ea7u ra ngay l\u1eadp t\u1ee9c khi c\u00f3 ngu\u1ed3n \u0111i\u1ec7n, h\u1eb9n gi\u1edd v\u00e0 ng\u1eaft \u0111\u1ea7u ra khi h\u1ebft th\u1eddi gian: m\u1ed9t ch\u1ee9c n\u0103ng \u201cgi\u1eef cho \u0111\u1ea7u ra ho\u1ea1t \u0111\u1ed9ng trong \u0111\u00fang X gi\u00e2y\u201d. <strong>One-shot (m\u1ed9t ph\u00e1t)<\/strong> \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n v\u00e0 ph\u00e1t ra m\u1ed9t xung c\u00f3 th\u1eddi gian \u0111\u1ecbnh s\u1eb5n cho m\u1ed7i l\u1ea7n k\u00edch ho\u1ea1t; c\u00e1c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u0111\u1ebfn trong kho\u1ea3ng th\u1eddi gian c\u1ee7a xung n\u00e0y s\u1ebd b\u1ecb b\u1ecf qua. <strong>Ch\u1ebf \u0111\u1ed9 nh\u1ea5p nh\u00e1y \/ chu k\u1ef3 l\u1eb7p l\u1ea1i<\/strong> l\u1eb7p l\u1ea1i t\u00edn hi\u1ec7u \u0111\u1ea7u ra v\u00e0o (c\u00e1c) th\u1eddi \u0111i\u1ec3m \u0111\u00e3 \u0111\u1eb7t mi\u1ec5n l\u00e0 ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p: \u0111\u00e8n c\u1ea3nh b\u00e1o nh\u1ea5p nh\u00e1y, b\u1ed9 c\u1ea5p ngu\u1ed3n gi\u00e1n \u0111o\u1ea1n.<\/p>\n\n<p>Thu\u1eadt ng\u1eef ch\u00ednh l\u00e0 \u0111i\u1ec3m khi\u1ebfn ng\u01b0\u1eddi mua d\u1ec5 nh\u1ea7m l\u1eabn. \u201cDelay on make\u201d, \u201cdelay on operate\u201d v\u00e0 \u201cdelay on energize\u201d \u0111\u1ec1u l\u00e0 c\u00f9ng m\u1ed9t h\u00e0nh vi tr\u1ec5 khi \u0111\u00f3ng (on-delay) nh\u01b0ng \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 cung c\u1ea5p g\u1ecdi b\u1eb1ng nh\u1eefng thu\u1eadt ng\u1eef kh\u00e1c nhau. H\u00e0nh vi tr\u1ec5 khi m\u1edf (off-delay) t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c thu\u1eadt ng\u1eef \u201cdelay on break\u201d, \u201cdelay on release\u201d v\u00e0 \u201cdelay on de-energization\u201d. C\u00f2n \u201c8 ch\u00e2n so v\u1edbi 11 ch\u00e2n\u201d l\u00e0 v\u1ea5n \u0111\u1ec1 li\u00ean quan \u0111\u1ebfn ch\u00e2n c\u1eafm, ch\u1ee9 kh\u00f4ng ph\u1ea3i v\u1ea5n \u0111\u1ec1 v\u1ec1 ch\u1ee9c n\u0103ng. \u0110\u1eebng bao gi\u1edd \u0111\u1ec3 h\u00ecnh d\u1ea1ng v\u1ecf b\u1ecdc \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ee9c n\u0103ng m\u00e0 b\u1ea1n \u0111\u1eb7t h\u00e0ng. C\u00e1c \u0111\u1ecbnh ngh\u0129a v\u1ec1 ch\u1ee9c n\u0103ng \u0111\u01b0\u1ee3c n\u00eau \u1edf tr\u00ean nh\u01b0 sau: <a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\">B\u1ea3ng tham chi\u1ebfu c\u00e1c h\u00e0m th\u1eddi gian c\u1ee7a Macromatic<\/a>.<\/p>\n\n<h3>G\u00f3c ti\u1ebfp \u0111i\u1ec3m: NO\/NC \u00d7 \u0111\u00f3ng theo th\u1eddi gian\/m\u1edf theo th\u1eddi gian<\/h3>\n\n<p>Ph\u1ea3i ch\u1ec9 \u0111\u1ecbnh hai l\u1ea7n lo\u1ea1i ti\u1ebfp \u0111i\u1ec3m tr\u1ec5 th\u1eddi gian: ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf ho\u1eb7c ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng \u0111\u00f3ng, <em>v\u00e0<\/em> li\u1ec7u \u0111\u1ed9 tr\u1ec5 c\u00f3 t\u00e1c \u0111\u1ed9ng theo h\u01b0\u1edbng \u0111\u00f3ng hay m\u1edf. Giao nhau c\u1ee7a hai tr\u1ee5c n\u00e0y s\u1ebd cho ra b\u1ed1n ki\u1ec3u ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ti\u1ebfp \u0111i\u1ec3m, \u0111\u00f3 l\u00e0 <a href=\"https:\/\/www.allaboutcircuits.com\/textbook\/digital\/chpt-5\/time-delay-relays\/\">T\u1ea5t c\u1ea3 v\u1ec1 m\u1ea1ch \u0111i\u1ec7n<\/a> \u0111\u01b0\u1ee3c tr\u00ecnh b\u00e0y d\u01b0\u1edbi d\u1ea1ng NOTC, NOTO, NCTO v\u00e0 NCTC:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">Quadrant li\u00ean h\u1ec7: tr\u1ea1ng th\u00e1i \u00d7 h\u01b0\u1edbng tr\u1ec5<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>M\u00e3<\/th><th>Tr\u1ea1ng th\u00e1i ngh\u1ec9<\/th><th>V\u1ec1 vi\u1ec7c c\u1ea5p ngu\u1ed3n<\/th><th>Khi ng\u1eaft ngu\u1ed3n<\/th><th>C\u00f4ng vi\u1ec7c ph\u1ed5 bi\u1ebfn<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>NOTC (KH\u00d4NG, \u0111\u00f3ng theo th\u1eddi gian)<\/td><td>M\u1edf<\/td><td>\u0110\u00f3ng sau khi h\u1ebft th\u1eddi gian ch\u1edd<\/td><td>M\u1edf ngay l\u1eadp t\u1ee9c<\/td><td>\u201cC\u1ed7 m\u00e1y ch\u1ee7 l\u1ef1c\u201d v\u1edbi ch\u1ebf \u0111\u1ed9 tr\u1ec5 \u0111\u00f3ng; m\u1ed9t ti\u1ebfp \u0111i\u1ec3m NO \u0111\u00f3ng sau th\u1eddi gian t<\/td><\/tr>\n <tr><td>NOTO (KH\u00d4NG, m\u1edf theo th\u1eddi gian)<\/td><td>M\u1edf<\/td><td>\u0110\u00f3ng c\u1eeda ngay l\u1eadp t\u1ee9c<\/td><td>M\u1edf c\u1eeda sau khi h\u1ebft th\u1eddi gian ho\u00e3n<\/td><td>\u0110\u1ea7u ra c\u00f3 \u0111\u1ed9 tr\u1ec5 ng\u1eaft; m\u1ed9t ti\u1ebfp \u0111i\u1ec3m NO ng\u1eaft sau t<\/td><\/tr>\n <tr><td>NCTO (NC, m\u1edf theo th\u1eddi gian)<\/td><td>\u0110\u00e3 \u0111\u00f3ng<\/td><td>M\u1edf c\u1eeda sau khi h\u1ebft th\u1eddi gian ho\u00e3n<\/td><td>\u0110\u00f3ng c\u1eeda ngay l\u1eadp t\u1ee9c<\/td><td>\u201cNg\u1eaft m\u1ea1ch n\u00e0y sau t\u201d khi c\u1ea5p \u0111i\u1ec7n<\/td><\/tr>\n <tr><td>NCTC (NC, \u0111\u00f3ng theo th\u1eddi gian)<\/td><td>\u0110\u00e3 \u0111\u00f3ng<\/td><td>M\u1edf ngay l\u1eadp t\u1ee9c<\/td><td>T\u1eaft sau th\u1eddi gian tr\u1ec5 khi ng\u1eaft ngu\u1ed3n<\/td><td>NC c\u00f3 \u0111\u1ed9 tr\u1ec5 ng\u1eaft; tr\u1edf l\u1ea1i tr\u1ea1ng th\u00e1i \u0111\u00f3ng sau t khi \u0111\u01b0\u1ee3c th\u1ea3 ra<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>Vi\u1ec7c \u0111\u1ecdc s\u01a1 \u0111\u1ed3 th\u1eddi gian c\u0169ng gi\u1ed1ng nh\u01b0 k\u1ef9 n\u0103ng \u0111\u1ecdc h\u00ecnh \u1ea3nh: m\u1ed9t \u0111\u01b0\u1eddng d\u00e0nh cho t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, m\u1ed9t \u0111\u01b0\u1eddng d\u00e0nh cho ti\u1ebfp \u0111i\u1ec3m \u0111\u1ea7u ra, th\u1eddi gian tr\u00f4i t\u1eeb tr\u00e1i sang ph\u1ea3i. To\u00e0n b\u1ed9 s\u01a1 \u0111\u1ed3 n\u00e0y \u0111\u1eb7t ra hai c\u00e2u h\u1ecfi: <em>Khi n\u00e0o t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t, v\u00e0 bao l\u00e2u sau khi t\u00edn hi\u1ec7u \u0111\u1ea7u v\u00e0o thay \u0111\u1ed5i \u0111\u1ed9t ng\u1ed9t th\u00ec t\u00edn hi\u1ec7u \u0111\u1ea7u ra m\u1edbi thay \u0111\u1ed5i?<\/em> Tr\u1ea3 l\u1eddi nh\u1eefng c\u00e2u h\u1ecfi n\u00e0y, b\u1ea1n s\u1ebd c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c r\u01a1le trong b\u1ea5t k\u1ef3 m\u1ea1ch \u0111i\u1ec7n n\u00e0o m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ghi nh\u1edb b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec. Khi ch\u1ecdn r\u01a1le thay th\u1ebf, tr\u01b0\u1edbc ti\u00ean h\u00e3y \u0111\u1ed1i chi\u1ebfu k\u00fd hi\u1ec7u tr\u00ean b\u1ea3ng t\u00ean c\u0169 v\u1edbi g\u00f3c ph\u1ea7n t\u01b0 n\u00e0y, sau \u0111\u00f3 m\u1edbi \u0111\u1ed1i chi\u1ebfu v\u1edbi ch\u1ee9c n\u0103ng. Hai r\u01a1le c\u00f3 c\u00f9ng m\u00e3 ch\u1ee9c n\u0103ng nh\u01b0ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m g\u00f3c ph\u1ea7n t\u01b0 kh\u00e1c nhau th\u00ec kh\u00f4ng th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau.<\/p>\n\n<h3>Th\u1ef1c t\u1ebf th\u00ec \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n?<\/h3>\n\n<p>\u0110\u00e2y l\u00e0 c\u00e2u m\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u01b0\u1edbng d\u1eabn \u0111\u1ec1u b\u1ecf qua, v\u00e0 c\u0169ng ch\u00ednh l\u00e0 c\u00e2u g\u00e2y ra nhi\u1ec1u nh\u1ea7m l\u1eabn nh\u1ea5t khi th\u1ef1c h\u00e0nh:<\/p>\n\n\n<div class=\"bp-1-hook bd-reveal\">\n <div class=\"bp-1-icon\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M12 2v10\"\/><path d=\"M18.4 6.6a9 9 0 1 1-12.77.04\"\/><\/svg>\n <\/div>\n <div class=\"bp-1-body\">\n <p class=\"bp-1-title\">C\u00e1ch x\u1eed l\u00fd m\u1eb7c \u0111\u1ecbnh khi m\u1ea5t \u0111i\u1ec7n l\u00e0: kh\u1edfi \u0111\u1ed9ng l\u1ea1i<\/p>\n <p class=\"bp-1-lines\">Ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng khi m\u1ea1ch \u0111i\u1ec7n v\u1eabn c\u00f2n ngu\u1ed3n. M\u1ed9t ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t ngu\u1ed3n l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng \u0111\u1eb7c bi\u1ec7t \u2014 ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 t\u00ednh n\u0103ng ti\u00eau chu\u1ea9n c\u1ee7a ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft.<\/p>\n <\/div>\n<\/div>\n\n<p>C\u1ee5 th\u1ec3, m\u1ea1ch tr\u1ec5 b\u1eadt (off-delay) \u0111\u01b0\u1ee3c chia th\u00e0nh hai s\u1ea3n ph\u1ea9m tr\u00f4ng gi\u1ed1ng h\u1ec7t nhau tr\u00ean k\u1ec7 h\u00e0ng. <strong>Ch\u1ebf \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t<\/strong> c\u1ea7n c\u00f3 \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n duy tr\u00ec li\u00ean t\u1ee5c: khi t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t b\u1ecb ng\u1eaft, b\u1ed9 \u0111\u1ebfm th\u1eddi gian v\u1eabn ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng, v\u00e0 n\u1ebfu ngu\u1ed3n \u0111i\u1ec7n b\u1ecb ng\u1eaft gi\u1eefa ch\u1eebng, \u0111i\u1ec7n \u00e1p \u0111\u1ea7u ra s\u1ebd gi\u1ea3m ngay l\u1eadp t\u1ee9c. L\u00fac \u0111\u00f3 s\u1ebd kh\u00f4ng c\u00f2n g\u00ec \u0111\u1ec3 \u0111\u1ebfm n\u1eefa. <strong>\u201cTh\u1eddi gian tr\u1ec5 sau \u201dth\u1ef1c\u201d<\/strong> gi\u1eef cho \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n sau khi ng\u1eaft ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n, v\u00e0 th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef, th\u01b0\u1eddng l\u00e0 t\u1eeb \u0111\u01b0\u1eddng \u0111i\u1ec7n t\u1ee5 \u0111i\u1ec7n. T\u00e0i li\u1ec7u tham kh\u1ea3o c\u1ee7a Macromatic m\u00f4 t\u1ea3 tr\u00ecnh t\u1ef1 nh\u01b0 sau: \u0111\u1ea7u ra \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n khi c\u00f3 ngu\u1ed3n; th\u1eddi gian \u0111\u1ebfm b\u1eaft \u0111\u1ea7u khi \u0111i\u1ec7n \u00e1p \u0111\u1ea7u v\u00e0o b\u1ecb ng\u1eaft; v\u00e0 vi\u1ec7c c\u1ea5p l\u1ea1i ngu\u1ed3n trong kho\u1ea3ng th\u1eddi gian tr\u1ec5 s\u1ebd l\u00e0m thi\u1ebft b\u1ecb tr\u1edf v\u1ec1 tr\u1ea1ng th\u00e1i ban \u0111\u1ea7u. T\u00e0i li\u1ec7u n\u00e0y c\u0169ng l\u01b0u \u00fd r\u1eb1ng m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n tr\u01b0\u1edbc kho\u1ea3ng n\u1eeda gi\u00e2y \u0111\u1ec3 \u0111\u01b0\u1eddng \u0111i\u1ec7n d\u1ef1 tr\u1eef c\u00f3 th\u1ec3 s\u1ea1c \u0111\u1ea7y (<a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\">Macromatic<\/a>). C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 \u0111\u1ed9ng c\u01a1 thu\u1ed9c nh\u00f3m th\u1ee9 ba, c\u00f3 kh\u1ea3 n\u0103ng duy tr\u00ec tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m cu\u1ed1i c\u00f9ng trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u00edch tr\u1eef sau khi m\u1ea5t \u0111i\u1ec7n. \u201cC\u00e1c thi\u1ebft b\u1ecb n\u00e0y s\u1ebd c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n s\u1ef1 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i ti\u1ebfp \u0111i\u1ec3m trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn sau khi m\u1ea5t \u0111i\u1ec7n,\u201d nh\u01b0 m\u1ed9t k\u1ef9 s\u01b0 \u0111\u00e3 nh\u1eadn \u0111\u1ecbnh trong m\u1ed9t cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 vi\u1ec7c n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng (<a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">r\/k\u1ef9 thu\u1eadt<\/a>). M\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed kh\u00f4ng c\u00f3 b\u1ed9 nh\u1edb kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, v\u00e0 vi\u1ec7c k\u1ef3 v\u1ecdng n\u00f3 l\u00e0m \u0111\u01b0\u1ee3c ch\u00ednh l\u00e0 \u0111i\u1ec1u b\u1ea5t ng\u1edd kinh \u0111i\u1ec3n.<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">H\u00e0nh vi khi b\u1ecb gi\u00e1n \u0111o\u1ea1n \u2014 c\u00e1ch m\u1ed7i h\u00e0m ph\u1ea3n \u1ee9ng khi ngu\u1ed3n \u0111i\u1ec7n ho\u1eb7c t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t g\u1eb7p s\u1ef1 c\u1ed1<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Ch\u1ee9c n\u0103ng<\/th><th>Ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n b\u1ecb ng\u1eaft gi\u1eefa chu k\u1ef3<\/th><th>B\u1ed9 k\u00edch ho\u1ea1t \u0111\u00e3 b\u1ecb g\u1ee1 b\u1ecf gi\u1eefa chu k\u1ef3<\/th><th>K\u00edch ho\u1ea1t l\u1ea1i trong qu\u00e1 tr\u00ecnh \u0111\u1ecbnh th\u1eddi<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Th\u1eddi gian tr\u1ec5 b\u1eadt<\/td><td>S\u1ed1 l\u01b0\u1ee3ng \u0111\u1ea7u ra gi\u1ea3m; s\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i v\u1ec1 0<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 m\u1edf (lo\u1ea1i k\u00edch ho\u1ea1t)<\/td><td>S\u1ea3n l\u01b0\u1ee3ng gi\u1ea3m ngay l\u1eadp t\u1ee9c<\/td><td>Th\u1eddi gian b\u1eaft \u0111\u1ea7u \u2014 \u0111\u00e2y l\u00e0 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t m\u00e0 n\u00f3 \u0111ang ch\u1edd \u0111\u1ee3i<\/td><td>S\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i; \u0111\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 t\u1eaft th\u1ef1c (lo\u1ea1i t\u00edch tr\u1eef)<\/td><td>\u0110\u1ed3ng h\u1ed3 ti\u1ebfp t\u1ee5c ch\u1ea1y d\u1ef1a tr\u00ean n\u0103ng l\u01b0\u1ee3ng d\u1ef1 tr\u1eef; c\u00f4ng su\u1ea5t gi\u1ea3m khi h\u1ebft th\u1eddi gian<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>\u0110\u1ea7u ra v\u1eabn \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n; s\u1ed1 \u0111\u1ebfm s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i khi ngu\u1ed3n \u0111i\u1ec7n \u0111\u01b0\u1ee3c kh\u00f4i ph\u1ee5c<\/td><\/tr>\n <tr><td>Kho\u1ea3ng th\u1eddi gian b\u1eadt<\/td><td>\u0110\u1ea7u ra gi\u1ea3m; s\u1ed1 \u0111\u1ebfm \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><td>Kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t \u2014 Kh\u00f4ng \u00e1p d\u1ee5ng<\/td><\/tr>\n <tr><td>Ch\u1ec9 m\u1ed9t l\u1ea7n<\/td><td>Xung b\u1ecb c\u1eaft ng\u1eafn; r\u01a1le t\u1ef1 k\u00edch ho\u1ea1t l\u1ea1i<\/td><td>Xung ti\u1ebfp t\u1ee5c (kh\u00f4ng s\u1eed d\u1ee5ng b\u1ed9 k\u00edch ho\u1ea1t trong su\u1ed1t th\u1eddi gian di\u1ec5n ra xung)<\/td><td>B\u1ecb b\u1ecf qua trong su\u1ed1t chu k\u1ef3 xung; t\u1ef1 k\u00edch ho\u1ea1t l\u1ea1i sau \u0111\u00f3<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>\u201cResets\u201d \u1edf tr\u00ean c\u00f3 ngh\u0129a l\u00e0 s\u1ed1 \u0111\u1ebfm s\u1ebd b\u1ecb x\u00f3a b\u1ecf v\u00e0 b\u1eaft \u0111\u1ea7u l\u1ea1i t\u1eeb 0 khi c\u00e1c \u0111i\u1ec1u ki\u1ec7n tr\u1edf l\u1ea1i b\u00ecnh th\u01b0\u1eddng. M\u1ed9t s\u1ed1 bi\u1ebfn th\u1ec3 \u0111\u1eb7c bi\u1ec7t, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ed9t s\u1ed1 h\u00e0m ph\u1ea7n tr\u0103m v\u00e0 h\u00e0m chu k\u1ef3 l\u1eb7p c\u00f3 ch\u1ebf \u0111\u1ed9 ghi nh\u1edb, ho\u1ea1t \u0111\u1ed9ng kh\u00e1c \u0111i, v\u00ec v\u1eady h\u00e3y tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u c\u1ee5 th\u1ec3. H\u1eadu qu\u1ea3 th\u1ef1c t\u1ebf l\u00e0 r\u1ea5t r\u00f5 r\u00e0ng. M\u1ed9t m\u1ea1ch \u201cch\u1ea1y qu\u1ea1t li\u00ean t\u1ee5c\u201d \u0111\u01b0\u1ee3c \u201cc\u1ed1 \u0111\u1ecbnh\u201d b\u1eb1ng \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t s\u1ebd l\u00e0m qu\u1ea1t ng\u1eebng ho\u1ea1t \u0111\u1ed9ng ngay l\u1eadp t\u1ee9c khi ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n b\u1ecb ng\u1eaft c\u00f9ng v\u1edbi qu\u1ea1t. \u0110\u00f3 ch\u00ednh l\u00e0 s\u1ef1 nh\u1ea7m l\u1eabn m\u00e0 m\u1ed9t th\u1ee3 \u0111i\u1ec7n \u0111\u00e3 \u0111\u0103ng t\u1ea3i sau khi k\u1ef3 v\u1ecdng r\u1eb1ng \u0111\u1ed9 tr\u1ec5 t\u1eaft s\u1ebd duy tr\u00ec th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng ngay c\u1ea3 khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n (<a href=\"https:\/\/www.reddit.com\/r\/ElectricalEngineering\/comments\/1v3mojz\/question_about_offdelay_timer_operation_after\/\">r\/K\u1ef9_thu\u1eadt_\u0111i\u1ec7n<\/a>). N\u1ebfu qu\u1ea1t ph\u1ea3i ti\u1ebfp t\u1ee5c ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t \u0111i\u1ec7n, b\u1ea1n c\u1ea7n m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd t\u1eaft th\u1ef1c s\u1ef1 ho\u1eb7c m\u1ed9t b\u1ed9 gi\u1eef ngu\u1ed3n ri\u00eang bi\u1ec7t. Kh\u00f4ng ph\u1ea3i b\u1ea5t k\u1ef3 b\u1ed9 h\u1eb9n gi\u1edd t\u1eaft n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c.<\/p>\n\n<h2>H\u1ecfng hay ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh? Ki\u1ec3m tra th\u1ef1c \u0111\u1ecba v\u00e0 n\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd c\u01a1 kh\u00ed l\u00ean lo\u1ea1i \u0111i\u1ec7n t\u1eed<\/h2>\n\n<h3>Ki\u1ec3m tra th\u1ef1c t\u1ebf tr\u01b0\u1edbc khi \u0111\u1ed5 l\u1ed7i cho b\u1ed9 h\u1eb9n gi\u1edd<\/h3>\n\n<p>M\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd \u201ckh\u00f4ng c\u00f2n ho\u1ea1t \u0111\u1ed9ng\u201d th\u01b0\u1eddng l\u00e0 do h\u1ebft pin, b\u1ecb h\u1ecfng b\u1ed9 k\u00edch ho\u1ea1t ho\u1eb7c c\u00e0i \u0111\u1eb7t b\u1ecb sai. H\u00e3y ki\u1ec3m tra c\u00e1c nguy\u00ean nh\u00e2n \u0111\u01a1n gi\u1ea3n tr\u01b0\u1edbc:<\/p>\n\n<div class=\"rich-card bd-reveal\">\n <ul class=\"rich-list\">\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra cu\u1ed9n d\u00e2y ho\u1eb7c c\u00e1c c\u1ef1c \u0111i\u1ec1u khi\u1ec3n \u2014 li\u1ec7u \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u00f3 th\u1ef1c s\u1ef1 xu\u1ea5t hi\u1ec7n \u0111\u00fang l\u00fac hay kh\u00f4ng? N\u1ebfu kh\u00f4ng c\u00f3 \u0111i\u1ec7n \u00e1p, kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u \u0111\u1ed3ng b\u1ed9, th\u00ec kh\u00f4ng ph\u1ea3i do r\u01a1le g\u00e2y ra s\u1ef1 c\u1ed1.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra m\u1ea1ch k\u00edch ho\u1ea1t tr\u00ean c\u00e1c lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft v\u00e0 lo\u1ea1i m\u1ed9t l\u1ea7n \u2014 li\u1ec7u ti\u1ebfp \u0111i\u1ec3m k\u00edch ho\u1ea1t c\u00f3 th\u1ef1c s\u1ef1 m\u1edf v\u00e0 \u0111\u00f3ng kh\u00f4ng? C\u00f4ng t\u1eafc gi\u1edbi h\u1ea1n b\u1ecb b\u00e1m b\u1ea9n ho\u1eb7c \u0111\u1ea7u ra PLC \u1edf tr\u1ea1ng th\u00e1i n\u1ed5i s\u1ebd khi\u1ebfn m\u1ea1ch k\u00edch ho\u1ea1t kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>Ki\u1ec3m tra l\u1ea1i c\u00e0i \u0111\u1eb7t \u2014 n\u00fam v\u1eb7n b\u1ecb va ch\u1ea1m, c\u00f4ng t\u1eafc DIP b\u1ecb thay \u0111\u1ed5i, ho\u1eb7c c\u00f3 ai \u0111\u00f3 \u0111\u00e3 \u201cch\u1ec9nh s\u1eeda\u201d th\u00f4ng s\u1ed1 th\u1eddi gian ra ngo\u00e0i ph\u1ea1m vi cho ph\u00e9p.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>D\u00f9ng \u0111\u1ed3ng h\u1ed3 b\u1ea5m gi\u1edd \u0111\u1ec3 \u0111o th\u1eddi gian \u2014 \u0111\u1ed9 tr\u1ec5 b\u1eadt: b\u1eadt ngu\u1ed3n, \u0111o cho \u0111\u1ebfn khi ti\u1ebfp \u0111i\u1ec3m thay \u0111\u1ed5i. \u0110\u1ed9 tr\u1ec5 t\u1eaft: lo\u1ea1i b\u1ecf t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, \u0111o cho \u0111\u1ebfn khi ng\u1eaft. M\u1ed9t b\u1ed9 ph\u1eadn kh\u00ed n\u00e9n c\u00f3 gi\u00e1 tr\u1ecb n\u1eb1m trong kho\u1ea3ng \u00b110% so v\u1edbi c\u00e0i \u0111\u1eb7t \u0111\u01b0\u1ee3c coi l\u00e0 n\u1eb1m trong gi\u1edbi h\u1ea1n dung sai c\u00f4ng b\u1ed1, kh\u00f4ng ph\u1ea3i l\u00e0 l\u1ed7i.<\/span><\/li>\n <li><svg class=\"rich-ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><circle cx=\"12\" cy=\"12\" r=\"10\"\/><path d=\"m9 12 2 2 4-4\"\/><\/svg><span>H\u00e3y ch\u1ee5p \u1ea3nh b\u1ea3ng t\u00ean v\u00e0 ghi l\u1ea1i k\u00fd hi\u1ec7u ch\u1ee9c n\u0103ng tr\u01b0\u1edbc khi th\u00e1o b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn n\u00e0o \u2014 linh ki\u1ec7n thay th\u1ebf s\u1ebd \u0111\u01b0\u1ee3c gh\u00e9p n\u1ed1i v\u1edbi b\u1ea3n ghi \u0111\u00f3, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean tr\u00ed nh\u1edb.<\/span><\/li>\n <\/ul>\n<\/div>\n\n<h3>N\u00e2ng c\u1ea5p b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 c\u01a1 kh\u00ed b\u1eb1ng r\u01a1le \u0111i\u1ec7n t\u1eed<\/h3>\n\n<p>M\u1ed9t s\u1ef1 chuy\u1ec3n \u0111\u1ed5i \u00e2m th\u1ea7m \u0111ang di\u1ec5n ra t\u1ea1i c\u00e1c x\u01b0\u1edfng b\u1ea3o tr\u00ec. C\u00e1c m\u00e1y m\u00f3c c\u0169 v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ho\u1eb7c \u0111\u1ed9ng c\u01a1, trong khi gi\u00e1 ph\u1ee5 t\u00f9ng \u0111\u00e3 tr\u1edf n\u00ean \u0111\u1eaft \u0111\u1ecf. T\u1ea1i m\u1ed9t <a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">Ch\u1ee7 \u0111\u1ec1 tr\u00ean r\/engineering<\/a>, m\u1ed9t gi\u00e1m \u0111\u1ed1c b\u1ea3o tr\u00ec \u0111\u00e3 \u0111\u01b0a ra m\u1ee9c gi\u00e1 h\u01a1n US$700 cho vi\u1ec7c thay th\u1ebf m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ch\u00ednh h\u00e3ng (OEM). B\u1ed9 h\u1eb9n gi\u1edd n\u00e0y \u0111\u01b0\u1ee3c l\u1eafp tr\u00ean m\u1ed9t m\u00e1y h\u00e0n qu\u1ef9 \u0111\u1ea1o, v\u00e0 \u00f4ng \u0111\u00e3 th\u1eafc m\u1eafc t\u1ea1i sao kh\u00f4ng \u0111i\u1ec1u khi\u1ec3n c\u00f9ng m\u1ed9t r\u01a1le b\u1eb1ng m\u1ed9t b\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed th\u00f4ng th\u01b0\u1eddng. \u00dd ki\u1ebfn chung trong ch\u1ee7 \u0111\u1ec1 n\u00e0y l\u00e0: vi\u1ec7c thay th\u1ebf b\u1eb1ng b\u1ed9 h\u1eb9n gi\u1edd \u0111i\u1ec7n t\u1eed l\u00e0 \u0111i\u1ec1u th\u01b0\u1eddng th\u1ea5y v\u00e0 r\u1ebb h\u01a1n \u0111\u00e1ng k\u1ec3, nh\u01b0ng c\u00f3 hai \u0111i\u1ec3m c\u1ea7n l\u01b0u \u00fd: vi\u1ec7c thay \u0111\u1ed5i h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n v\u00e0 c\u01a1 ch\u1ebf an to\u00e0n khi h\u1ecfng h\u00f3c.<\/p>\n\n<p>Vi\u1ec7c n\u00e2ng c\u1ea5p l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi h\u00e0nh vi, ch\u1ee9 kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c ch\u1ec9 t\u1eadp trung v\u00e0o m\u00e3 s\u1ea3n ph\u1ea9m:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">Ma tr\u1eadn thay th\u1ebf \u2014 nh\u1eefng \u0111i\u1ec1u c\u1ea7n x\u00e1c nh\u1eadn tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n vi\u1ec7c thay th\u1ebf \u0111i\u1ec7n t\u1eed, v\u00e0 t\u00e1c \u0111\u1ed9ng c\u1ee7a t\u1eebng c\u00e2u tr\u1ea3 l\u1eddi<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Y\u1ebfu t\u1ed1 then ch\u1ed1t c\u1ee7a m\u1ea1ch n\u00e0y l\u00e0 g\u00ec<\/th><th>Nh\u1eefng \u0111i\u1ec1u c\u1ea7n x\u00e1c nh\u1eadn<\/th><th>Tr\u1ea3 l\u1eddi \u0111i\u1ec7n t\u1eed n\u1ebfu \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn<\/th><th>N\u1ebfu b\u1ea1n b\u1ecf qua ph\u1ea7n n\u00e0y<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Th\u1eddi gian tr\u1ec5 sau khi c\u1ea5p \u0111i\u1ec7n<\/td><td>Ch\u1ee9c n\u0103ng n\u00e0y l\u00e0 ch\u1ebf \u0111\u1ed9 tr\u1ec5 b\u1eadt; l\u01b0u \u00fd ti\u1ebfp \u0111i\u1ec3m g\u00f3c ph\u1ea7n t\u01b0 tr\u00ean b\u1ea3ng t\u00ean<\/td><td>M\u00f4 h\u00ecnh tr\u1ec5 b\u1eadt ti\u00eau chu\u1ea9n; t\u01b0\u01a1ng th\u00edch v\u1edbi NOTC ho\u1eb7c NCTO<\/td><td>Vi\u1ec7c ti\u1ebfp x\u00fac sai g\u00f3c ph\u1ea7n t\u01b0 s\u1ebd \u0111\u1ea3o ng\u01b0\u1ee3c logic<\/td><\/tr>\n <tr><td>Th\u1eddi gian tr\u1ec5 t\u1eaft khi ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n lu\u00f4n c\u00f3 s\u1eb5n<\/td><td>Lo\u1ea1i c\u00f4ng t\u1eafc k\u00edch ho\u1ea1t v\u00e0 c\u1ea5p \u0111i\u1ec7n \u00e1p<\/td><td>Ch\u1ebf \u0111\u1ed9 tr\u1ec5 t\u1eaft ki\u1ec3u k\u00edch ho\u1ea1t; h\u00e3y k\u1ebft n\u1ed1i d\u00e2y k\u00edch ho\u1ea1t \u0111\u00fang c\u00e1ch (ti\u1ebfp \u0111i\u1ec3m kh\u00f4 so v\u1edbi \u0111i\u1ec7n \u00e1p)<\/td><td>Vi\u1ec7c c\u1ea5p \u0111i\u1ec7n \u00e1p v\u00e0o \u0111\u1ea7u v\u00e0o k\u00edch ho\u1ea1t ki\u1ec3u ti\u1ebfp \u0111i\u1ec3m kh\u00f4 c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng r\u01a1le<\/td><\/tr>\n <tr><td>Thi\u1ebft b\u1ecb v\u1eabn duy tr\u00ec tr\u1ea1ng th\u00e1i ho\u1ea1t \u0111\u1ed9ng sau khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n \u0111i\u1ec7n<\/td><td>M\u1ea1ch n\u00e0y c\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o m\u1ea1ch gi\u1eef kh\u00f4ng?<\/td><td>Th\u1eddi gian tr\u1ec5 t\u1eaft th\u1ef1c (lo\u1ea1i l\u01b0u tr\u1eef) ho\u1eb7c m\u1ea1ch gi\u1eef c\u00f3 ngu\u1ed3n c\u1ea5p ri\u00eang<\/td><td>T\u00ecnh tr\u1ea1ng m\u1eb7c \u0111\u1ecbnh \u0111i\u1ec7n t\u1eed gi\u1ea3m ngay l\u1eadp t\u1ee9c \u2014 m\u1ed9t s\u1ef1 thay \u0111\u1ed5i v\u1ec1 h\u00e0nh vi, v\u00e0 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 an to\u00e0n<\/td><\/tr>\n <tr><td>C\u00e1c ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 t\u1ee9c th\u1eddi<\/td><td>C\u00e1c ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 c\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u kh\u00e1c trong m\u1ea1ch logic kh\u00f4ng?<\/td><td>M\u00f4 h\u00ecnh c\u00f3 ti\u1ebfp \u0111i\u1ec3m t\u1ee9c th\u1eddi v\u00e0 ti\u1ebfp \u0111i\u1ec3m h\u1eb9n gi\u1edd<\/td><td>N\u1ebfu kh\u00f4ng c\u00f3 \u0111\u1ea7u v\u00e0o ph\u1ee5 (aux), c\u00f3 ngh\u0129a l\u00e0 c\u1ea7n l\u1eafp th\u00eam m\u1ed9t r\u01a1le th\u1ee9 hai ho\u1eb7c ph\u1ea3i \u0111\u1ea5u l\u1ea1i d\u00e2y \u0111i\u1ec7n<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p cu\u1ed9n d\u00e2y ho\u1eb7c \u0111i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/td><td>D\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u (AC) hay d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC), v\u00e0 gi\u00e1 tr\u1ecb n\u00e0o<\/td><td>Kh\u1edbp ch\u00ednh x\u00e1c<\/td><td>\u0110i\u1ec7n \u00e1p sai \u2014 kh\u00f4ng c\u00f3 t\u00edn hi\u1ec7u \u0111\u1ed3ng b\u1ed9, ho\u1eb7c \u0111\u1ea7u v\u00e0o b\u1ecb ch\u00e1y<\/td><\/tr>\n <tr><td>\u1ed4 c\u1eafm v\u00e0 gi\u00e1 \u0111\u1ee1<\/td><td>8 ch\u00e2n ho\u1eb7c 11 ch\u00e2n (lo\u1ea1i octal), l\u1eafp tr\u00ean thanh DIN, l\u1eafp tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/td><td>Ch\u1ecdn m\u1eabu c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u01b0\u01a1ng, ho\u1eb7c d\u1ef1 tr\u00f9 kinh ph\u00ed \u0111\u1ec3 thay \u0111\u1ed5i n\u1ec1n t\u1ea3ng<\/td><td>M\u1ed9t chi ph\u00ed c\u1ea3i t\u1ea1o c\u01a1 kh\u00ed b\u1ea5t ng\u1edd v\u00e0o ph\u00fat ch\u00f3t<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t n\u1ed5i b\u1eadt nh\u1ea5t n\u1eb1m \u1edf h\u00e0ng th\u1ee9 ba: ch\u1ee9c n\u0103ng gi\u1eef khi m\u1ea5t \u0111i\u1ec7n. C\u00e1c b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 gi\u1eef c\u00e1c ti\u1ebfp \u0111i\u1ec3m trong th\u1eddi gian ng\u1eafn nh\u1edd n\u0103ng l\u01b0\u1ee3ng c\u01a1 h\u1ecdc t\u00edch tr\u1eef; trong khi \u0111\u00f3, r\u01a1le \u0111i\u1ec7n t\u1eed kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng t\u00edch tr\u1eef n\u0103ng l\u01b0\u1ee3ng th\u00ec kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. N\u1ebfu m\u1ea1ch ban \u0111\u1ea7u d\u1ef1a v\u00e0o ch\u1ee9c n\u0103ng gi\u1eef n\u00e0y, vi\u1ec7c thay th\u1ebf tr\u1ef1c ti\u1ebfp b\u1eb1ng r\u01a1le \u0111i\u1ec7n t\u1eed s\u1ebd l\u00e0m thay \u0111\u1ed5i c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u00e1y m\u00f3c. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng m\u1ed9t chi\u1ebfc qu\u1ea1t ph\u1ea3i l\u00e0m m\u00e1t tr\u1ee5c quay sau khi n\u00fat d\u1eebng ng\u1eaft to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng, ho\u1eb7c m\u1ed9t van ph\u1ea3i gi\u1eef nguy\u00ean v\u1ecb tr\u00ed trong tr\u01b0\u1eddng h\u1ee3p s\u1ee5t \u00e1p. Trong c\u00e1c m\u1ea1ch li\u00ean quan \u0111\u1ebfn an to\u00e0n, \u0111\u00f3 l\u00e0 m\u1ed9t thay \u0111\u1ed5i thi\u1ebft k\u1ebf, ch\u1ee9 kh\u00f4ng ph\u1ea3i vi\u1ec7c mua ph\u1ee5 t\u00f9ng thay th\u1ebf. M\u1ed9t ng\u01b0\u1eddi b\u00ecnh lu\u1eadn trong c\u00f9ng ch\u1ee7 \u0111\u1ec1 \u0111\u00e3 n\u00f3i th\u1eb3ng \u0111i\u1ec1u n\u00e0y: \u201cMi\u1ec5n l\u00e0 v\u1eabn c\u00f3 \u0111i\u1ec7n, b\u1ea1n c\u00f3 th\u1ec3 sao ch\u00e9p ch\u00ednh x\u00e1c h\u00e0nh vi \u0111\u00f3 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng r\u01a1le tr\u1ec5 \u0111i\u1ec7n.\u201d S\u1ef1 kh\u00e1c bi\u1ec7t ch\u1ec9 xu\u1ea5t hi\u1ec7n sau khi m\u1ea5t \u0111i\u1ec7n (<a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\">r\/k\u1ef9 thu\u1eadt<\/a>).<\/p>\n\n<p>M\u1eb7t t\u00edch c\u1ef1c c\u0169ng kh\u00f4ng k\u00e9m ph\u1ea7n r\u00f5 r\u00e0ng. \u0110\u1ed9 ch\u00ednh x\u00e1c l\u1eb7p l\u1ea1i \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n t\u1eeb \u00b110% so v\u1edbi c\u00e0i \u0111\u1eb7t (18\u201322 gi\u00e2y tr\u00ean m\u1eb7t s\u1ed1 20 gi\u00e2y) l\u00ean m\u1ee9c \u00b10,1% (<a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation<\/a>; <a href=\"https:\/\/www.geya.net\/how-a-time-delay-relay-works\/\">GEYA<\/a>). H\u01a1n n\u1eefa, kh\u00f4ng c\u00f3 van kim n\u00e0o b\u1ecb l\u1ec7ch, c\u0169ng kh\u00f4ng c\u00f3 \u1ed1ng th\u1ed5i n\u00e0o b\u1ecb l\u00e3o h\u00f3a.<\/p>\n\n<p>Khi b\u1ea1n g\u1eedi y\u00eau c\u1ea7u thay th\u1ebf \u0111\u00f3, nh\u00e0 cung c\u1ea5p c\u1ea7n tr\u1ea3 l\u1eddi chi ti\u1ebft theo t\u1eebng m\u1eabu s\u1ea3n ph\u1ea9m cho ch\u00ednh x\u00e1c s\u00e1u m\u1ee5c sau: ch\u1ee9c n\u0103ng, \u0111\u1eb7c t\u00ednh m\u1ea5t \u0111i\u1ec7n, lo\u1ea1i k\u00edch ho\u1ea1t, ti\u1ebfp \u0111i\u1ec3m ph\u1ee5, \u0111i\u1ec7n \u00e1p, k\u00edch th\u01b0\u1edbc l\u1eafp \u0111\u1eb7t. \u0110\u00f3 ch\u00ednh l\u00e0 c\u00e1ch d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1le c\u1ee7a ch\u00fang t\u00f4i t\u1ea1i OMCH ho\u1ea1t \u0111\u1ed9ng: b\u1ea3y d\u00f2ng r\u01a1le bao g\u1ed3m c\u1ea3 c\u00e1c lo\u1ea1i c\u00f3 \u0111\u1ed9 tr\u1ec5 th\u1eddi gian, v\u00e0 m\u1ed7i l\u1ef1a ch\u1ecdn \u0111\u1ec1u \u0111\u01b0\u1ee3c kh\u1edbp theo t\u1eebng m\u1eabu s\u1ea3n ph\u1ea9m, k\u00e8m theo b\u1ea3ng d\u1eef li\u1ec7u k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi b\u1ea1n x\u00e1c nh\u1eadn \u0111\u01a1n h\u00e0ng. Qu\u00e9t <a href=\"https:\/\/www.omch.com\/vi\/relay\/\">d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1le c\u1ee7a ch\u00fang t\u00f4i<\/a> v\u00e0 h\u00e3y g\u1eedi cho ch\u00fang t\u00f4i th\u00f4ng tin tr\u00ean b\u1ea3ng t\u00ean s\u1ea3n ph\u1ea9m; ch\u00fang t\u00f4i s\u1ebd tr\u1ea3 l\u1eddi d\u1ef1a tr\u00ean b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt, ch\u1ee9 kh\u00f4ng ph\u1ea3i d\u1ef1a tr\u00ean ph\u1ecfng \u0111o\u00e1n.<\/p>\n\n<h2>C\u00e1c th\u00f4ng s\u1ed1 c\u1ea7n ch\u1ec9 \u0111\u1ecbnh: Ch\u1ee9c n\u0103ng, \u0110i\u1ec7n \u00e1p, C\u01a1 ch\u1ebf k\u00edch ho\u1ea1t v\u00e0 C\u00e1ch l\u1eafp \u0111\u1eb7t<\/h2>\n\n<p>\u0110\u1eb7t h\u00e0ng t\u1eeb \u0111\u1ea7u thay v\u00ec l\u1ea5y t\u1eeb kho? M\u1ed9t b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt g\u1ed3m s\u00e1u d\u00f2ng s\u1ebd gi\u00fap nh\u1eadn \u0111\u01b0\u1ee3c b\u00e1o gi\u00e1 ch\u00ednh x\u00e1c ngay t\u1eeb l\u1ea7n \u0111\u1ea7u ti\u00ean. M\u1ed7i d\u00f2ng tr\u1ed1ng \u0111\u1ec1u khi\u1ebfn nh\u00e0 cung c\u1ea5p ph\u1ea3i ph\u1ecfng \u0111o\u00e1n:<\/p>\n\n<div class=\"rich-table-wrap bd-reveal\">\n <p class=\"rich-table-title\">B\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt g\u1ed3m s\u00e1u d\u00f2ng cho r\u01a1le tr\u1ec5 th\u1eddi gian<\/p>\n <div class=\"table-wrapper\"><table class=\"rich-table\">\n <thead><tr><th>Tham s\u1ed1<\/th><th>T\u1ea1i sao y\u1ebfu t\u1ed1 n\u00e0y l\u1ea1i quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi<\/th><th>N\u00ean di\u1ec5n \u0111\u1ea1t nh\u01b0 th\u1ebf n\u00e0o?<\/th><\/tr><\/thead>\n <tbody>\n <tr><td>Ch\u1ee9c n\u0103ng \u0111\u1ecbnh th\u1eddi gian<\/td><td>N\u00f3 thi\u1ebft l\u1eadp c\u00e1c quy t\u1eafc k\u00edch ho\u1ea1t, \u0111\u1ea7u ra v\u00e0 \u0111\u1eb7t l\u1ea1i<\/td><td>H\u00e3y n\u00eau r\u00f5 ch\u1ee9c n\u0103ng v\u00e0 \u0111i\u1ec3m ti\u1ebfp x\u00fac \u1edf g\u00f3c ph\u1ea7n t\u01b0 m\u00e0 b\u1ea1n c\u1ea7n \u2014 v\u00ed d\u1ee5: \u201ctr\u1ec5 m\u1edf, ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf (NO) \u0111\u00f3ng theo th\u1eddi gian\u201d<\/td><\/tr>\n <tr><td>\u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/td><td>M\u1ea1ch AC v\u00e0 m\u1ea1ch DC l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau<\/td><td>H\u00e3y n\u00eau r\u00f5 \u2014 \u201cAC 220 V\u201d ho\u1eb7c \u201cDC 24 V\u201d, ch\u1ee9 kh\u00f4ng ph\u1ea3i \u201cb\u1ea5t k\u1ef3 gi\u00e1 tr\u1ecb n\u00e0o\u201d<\/td><\/tr>\n <tr><td>Lo\u1ea1i c\u01a1 ch\u1ebf k\u00edch ho\u1ea1t<\/td><td>M\u1ea1ch ti\u1ebfp \u0111i\u1ec3m kh\u00f4 v\u00e0 m\u1ea1ch k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n \u00e1p l\u00e0 hai m\u1ea1ch \u0111\u1ea7u v\u00e0o kh\u00e1c nhau<\/td><td>H\u00e3y ch\u1ec9 \u0111\u1ecbnh \u0111\u1ea7u v\u00e0o ti\u1ebfp \u0111i\u1ec3m kh\u00f4, tr\u1eeb khi m\u1eabu \u0111\u00f3 \u0111\u01b0\u1ee3c ghi l\u00e0 \u201ck\u00edch ho\u1ea1t b\u1eb1ng ngu\u1ed3n \u0111i\u1ec7n\u201d<\/td><\/tr>\n <tr><td>Kho\u1ea3ng th\u1eddi gian v\u00e0 ph\u01b0\u01a1ng ph\u00e1p c\u00e0i \u0111\u1eb7t<\/td><td>Lo\u1ea1i c\u1ed1 \u0111\u1ecbnh, n\u00fam v\u1eb7n ho\u1eb7c DIP quy\u1ebft \u0111\u1ecbnh c\u00e1ch th\u1ee9c \u0111i\u1ec1u ch\u1ec9nh trong qu\u00e1 tr\u00ecnh v\u1eadn h\u00e0nh<\/td><td>H\u00e3y n\u00eau kho\u1ea3ng gi\u00e1 tr\u1ecb c\u1ea7n thi\u1ebft, ch\u1ee9 kh\u00f4ng ch\u1ec9 m\u1ed9t gi\u00e1 tr\u1ecb duy nh\u1ea5t<\/td><\/tr>\n <tr><td>C\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 s\u01a1 \u0111\u1ed3 ch\u00e2n c\u1eafm<\/td><td>\u1ed4 c\u1eafm 8 ch\u00e2n v\u00e0 11 ch\u00e2n, thanh DIN, b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/td><td>Ph\u00f9 h\u1ee3p v\u1edbi n\u1ec1n hi\u1ec7n c\u00f3 ho\u1eb7c l\u1eadp d\u1ef1 to\u00e1n cho vi\u1ec7c thay \u0111\u1ed5i n\u1ec1n<\/td><\/tr>\n <tr><td>\u0110\u1ed9 ch\u00ednh x\u00e1c khi l\u1eb7p l\u1ea1i<\/td><td>N\u00f3 x\u00e1c \u0111\u1ecbnh m\u1ee9c \u0111\u1ed9 m\u00e0 qu\u00e1 tr\u00ecnh ph\u1ea3i ch\u1ecbu \u0111\u1ef1ng<\/td><td>Lo\u1ea1i \u00b10,1% d\u00e0nh cho c\u00e1c quy tr\u00ecnh \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao; lo\u1ea1i \u00b110% ch\u1ec9 \u00e1p d\u1ee5ng n\u1ebfu b\u1ea1n th\u1ef1c s\u1ef1 kh\u00f4ng quan t\u00e2m<\/td><\/tr>\n <\/tbody>\n <\/table><\/div>\n<\/div>\n\n<p>H\u00e0ng k\u00edch ho\u1ea1t ch\u00ednh l\u00e0 n\u01a1i c\u00e1c r\u01a1le th\u1ef1c s\u1ef1 b\u1ecb h\u1ecfng trong \u0111i\u1ec1u ki\u1ec7n th\u1ef1c t\u1ebf, v\u00ec v\u1eady n\u00f3 c\u00f3 c\u1ea3nh b\u00e1o ri\u00eang nh\u01b0 sau:<\/p>\n\n<div class=\"rich-callout bd-reveal\">\n <span class=\"rich-callout-ico\" aria-hidden=\"true\">\n <svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3\"\/><path d=\"M12 9v4\"\/><path d=\"M12 17h.01\"\/><\/svg>\n <\/span>\n <div class=\"rich-callout-body\"><p>M\u1ed9t r\u01a1le \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 k\u00edch ho\u1ea1t b\u1eb1ng ti\u1ebfp \u0111i\u1ec3m kh\u00f4 c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng n\u1ebfu c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c c\u1ea5p v\u00e0o c\u00e1c c\u1ef1c k\u00edch ho\u1ea1t c\u1ee7a n\u00f3. Ch\u1ec9 nh\u1eefng m\u1eabu \u0111\u01b0\u1ee3c ghi r\u00f5 l\u00e0 \u201ck\u00edch ho\u1ea1t b\u1eb1ng ngu\u1ed3n\u201d m\u1edbi cho ph\u00e9p c\u00f3 \u0111i\u1ec7n \u00e1p t\u1ea1i c\u00e1c c\u1ef1c n\u00e0y. N\u1ebfu t\u00edn hi\u1ec7u \u0111i\u1ec1u khi\u1ec3n c\u1ee7a b\u1ea1n l\u00e0 \u0111i\u1ec7n \u00e1p c\u00f3 d\u00f2ng \u0111i\u1ec7n thay v\u00ec ti\u1ebfp \u0111i\u1ec3m, vui l\u00f2ng n\u00eau r\u00f5 \u0111i\u1ec1u n\u00e0y trong y\u00eau c\u1ea7u.<\/p><\/div>\n<\/div>\n\n<p>Ch\u1ec9 c\u1ea7n m\u1ed9t c\u00e2u l\u00e0 \u0111\u1ee7 \u0111\u1ec3 gi\u1ea3i th\u00edch l\u00fd do t\u1ea1i sao c\u00e1c m\u1eabu c\u00f4ng t\u1eafc DIP \u0111a ch\u1ee9c n\u0103ng l\u1ea1i x\u1ee9ng \u0111\u00e1ng v\u1edbi m\u1ee9c gi\u00e1 cao h\u01a1n. Ch\u1ec9 m\u1ed9t m\u1eabu duy nh\u1ea5t c\u00f3 th\u1ec3 chuy\u1ec3n \u0111\u1ed5i gi\u1eefa c\u00e1c ch\u1ebf \u0111\u1ed9 tr\u1ec5 b\u1eadt, tr\u1ec5 t\u1eaft, \u0111\u1ecbnh k\u1ef3 v\u00e0 m\u1ed9t l\u1ea7n k\u00edch ho\u1ea1t \u0111\u00e3 thay th\u1ebf \u0111\u01b0\u1ee3c b\u1ed1n m\u00e3 s\u1ea3n ph\u1ea9m trong ng\u0103n k\u00e9o c\u1ee7a b\u1ea1n. C\u00e0i \u0111\u1eb7t m\u00e3, c\u00e0i \u0111\u1eb7t th\u1eddi gian, th\u1ebf l\u00e0 xong.<\/p>\n\n\n<div class=\"bp-cta-mid bd-reveal\">\n <p class=\"bp-cta-mid-ttl\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect width=\"8\" height=\"4\" x=\"8\" y=\"2\" rx=\"1\" ry=\"1\"\/><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"\/><path d=\"m9 14 2 2 4-4\"\/><\/svg><\/span>H\u00e3y bi\u1ebfn s\u00e1u d\u00f2ng c\u1ee7a b\u1ea1n th\u00e0nh m\u00f4 h\u00ecnh ph\u00f9 h\u1ee3p<\/p>\n <p class=\"bp-cta-mid-copy\">H\u00e3y g\u1eedi cho ch\u00fang t\u00f4i b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a qu\u00fd kh\u00e1ch \u2014 ch\u1ee9c n\u0103ng, \u0111i\u1ec7n \u00e1p, t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t, ph\u1ea1m vi, \u0111\u1ebf, \u0111\u1ed9 ch\u00ednh x\u00e1c \u2014 v\u00e0 ch\u00fang t\u00f4i s\u1ebd ph\u1ea3n h\u1ed3i v\u1edbi m\u1eabu s\u1ea3n ph\u1ea9m ph\u00f9 h\u1ee3p c\u00f9ng b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a n\u00f3, \u0111\u1ec3 qu\u00fd kh\u00e1ch c\u00f3 th\u1ec3 x\u00e1c nh\u1eadn lo\u1ea1i r\u01a1le tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng.<\/p>\n <a class=\"bp-cta-mid-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">G\u1eedi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt b\u1ed9 chuy\u1ec3n m\u1ea1ch c\u1ee7a t\u00f4i<svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>G\u00f3c nh\u00ecn c\u1ee7a nh\u00e0 ph\u00e2n ph\u1ed1i: N\u00ean d\u1ef1 tr\u1eef nh\u1eefng m\u1eb7t h\u00e0ng n\u00e0o v\u00e0 n\u00ean y\u00eau c\u1ea7u nh\u1eefng g\u00ec trong m\u1ed7i b\u00e1o gi\u00e1 thay th\u1ebf<\/h2>\n\n<p>N\u1ebfu b\u1ea1n b\u00e1n c\u00e1c linh ki\u1ec7n n\u00e0y thay v\u00ec b\u1ea3o tr\u00ec ch\u00fang, t\u1ea5t c\u1ea3 nh\u1eefng \u0111i\u1ec1u n\u00eau tr\u00ean s\u1ebd \u0111\u01b0\u1ee3c t\u00f3m g\u1ecdn th\u00e0nh m\u1ed9t nguy\u00ean t\u1eafc v\u1eadn h\u00e0nh duy nh\u1ea5t: <strong>B\u1ea1n \u0111ang b\u00e1n tr\u1ea3i nghi\u1ec7m, ch\u1ee9 kh\u00f4ng ph\u1ea3i ph\u1ea7n c\u1ee9ng.<\/strong> M\u1ed7i y\u00eau c\u1ea7u thay th\u1ebf \u0111\u1ec1u l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 v\u1ec1 c\u00e1ch x\u1eed l\u00fd, ch\u1ec9 \u0111\u01b0\u1ee3c \u201cng\u1ee5y trang\u201d d\u01b0\u1edbi h\u00ecnh th\u1ee9c m\u00e3 s\u1ea3n ph\u1ea9m.<\/p>\n\n<p>H\u00e3y bi\u1ebfn b\u1ed1n c\u00e2u h\u1ecfi n\u00e0y th\u00e0nh th\u00f3i quen.<\/p>\n\n\n<div class=\"bp-2-ask bd-reveal\">\n <p class=\"bp-2-title\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m11 17-5-5 5-5\"\/><path d=\"m18 17-5-5 5-5\"\/><\/svg><\/span>B\u1ed1n c\u00e2u h\u1ecfi c\u1ea7n \u0111\u1eb7t ra tr\u01b0\u1edbc khi nh\u1eadn b\u1ea5t k\u1ef3 b\u00e1o gi\u00e1 thay th\u1ebf n\u00e0o<\/p>\n <div class=\"bp-2-grid\">\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">1<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">Ch\u1ee9c n\u0103ng n\u00e0o \u2014 \u0111\u1ed9 tr\u1ec5 b\u1eadt hay \u0111\u1ed9 tr\u1ec5 t\u1eaft?<\/p><p class=\"bp-2-line\">M\u1ed7i c\u00e1i ph\u1ea3n \u1ee9ng v\u1edbi m\u1ed9t t\u00edn hi\u1ec7u k\u00edch ho\u1ea1t kh\u00e1c nhau; n\u1ebfu k\u1ebft h\u1ee3p sai, logic s\u1ebd b\u1ecb \u0111\u1ea3o ng\u01b0\u1ee3c.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">2<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">D\u1eef li\u1ec7u \u0111\u1ea7u ra c\u00f3 c\u1ea7n \u0111\u01b0\u1ee3c duy tr\u00ec sau khi m\u1ea5t \u0111i\u1ec7n kh\u00f4ng?<\/p><p class=\"bp-2-line\">Ch\u1ec9 c\u00f3 lo\u1ea1i c\u00f3 th\u1eddi gian tr\u00ec ho\u00e3n t\u1eaft ho\u00e0n to\u00e0n ho\u1eb7c lo\u1ea1i l\u01b0u tr\u1eef m\u1edbi duy tr\u00ec \u0111\u01b0\u1ee3c th\u1eddi gian khi m\u1ea5t ngu\u1ed3n.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">3<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">\u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n n\u00e0o?<\/p><p class=\"bp-2-line\">AC v\u00e0 DC l\u00e0 hai s\u1ea3n ph\u1ea9m kh\u00e1c nhau, v\u00e0 c\u00e1c c\u1ea5p \u0111i\u1ec7n \u00e1p c\u0169ng v\u1eady.<\/p><\/div><\/div>\n <div class=\"bp-2-cell\"><span class=\"bp-2-chip\">4<\/span><div class=\"bp-2-cell-body\"><p class=\"bp-2-label\">Lo\u1ea1i ch\u00e2n c\u1eafm n\u00e0o \u2014 8 ch\u00e2n, 11 ch\u00e2n hay DIN?<\/p><p class=\"bp-2-line\">Trung t\u00e2m s\u1ebd quy\u1ebft \u0111\u1ecbnh \u0111\u00e2y l\u00e0 c\u00f4ng vi\u1ec7c thay th\u1ebf hay c\u00f4ng vi\u1ec7c n\u1ed1i l\u1ea1i d\u00e2y.<\/p><\/div><\/div>\n <\/div>\n<\/div>\n\n<p>C\u00e2u h\u1ecfi th\u1ee9 hai l\u00e0 \u0111i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t b\u1ea1n v\u1edbi m\u1ed9t nh\u00e0 cung c\u1ea5p ch\u1ec9 quan t\u00e2m \u0111\u1ebfn gi\u00e1 c\u1ea3. Hai thi\u1ebft k\u1ebf c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau khi m\u1ea5t ngu\u1ed3n, do \u0111\u00f3, m\u1ed9t gi\u1ea3i ph\u00e1p c\u00f3 ch\u1ee9c n\u0103ng tr\u00ec ho\u00e3n t\u1eaft m\u00e0 kh\u00f4ng k\u00e8m theo gi\u1ea3i ph\u00e1p x\u1eed l\u00fd tr\u01b0\u1eddng h\u1ee3p m\u1ea5t ngu\u1ed3n th\u00ec ch\u01b0a th\u1ec3 coi l\u00e0 m\u1ed9t \u0111\u01a1n h\u00e0ng c\u00f3 th\u1ec3 b\u00e1n \u0111\u01b0\u1ee3c. Gi\u1ea3i ph\u00e1p sai s\u1ebd b\u1ecb tr\u1ea3 l\u1ea1i, ho\u1eb7c t\u1ec7 h\u01a1n, d\u1eabn \u0111\u1ebfn m\u1ed9t thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u0111\u00fang c\u00e1ch v\u00e0 g\u00e2y ra r\u1ee7i ro v\u1ec1 an to\u00e0n.<\/p>\n\n<p>D\u00f2ng \u0111i\u1ec7n n\u00e2ng c\u1ea5p ch\u00ednh l\u00e0 t\u00edn hi\u1ec7u nhu c\u1ea7u \u0111\u00e1ng tin c\u1eady nh\u1ea5t c\u1ee7a b\u1ea1n. M\u1ed7i x\u01b0\u1edfng v\u1eabn \u0111ang s\u1eed d\u1ee5ng b\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n ho\u1eb7c ch\u1ea1y b\u1eb1ng \u0111\u1ed9ng c\u01a1 tr\u00ean thi\u1ebft b\u1ecb c\u0169 \u0111\u1ec1u l\u00e0 m\u1ed9t c\u01a1 h\u1ed9i ti\u1ec1m n\u0103ng \u0111\u1ec3 nh\u1eadn y\u00eau c\u1ea7u thay th\u1ebf. Ph\u1ee5 t\u00f9ng OEM r\u1ea5t \u0111\u1eaft \u0111\u1ecf, v\u00e0 s\u1ef1 ch\u00eanh l\u1ec7ch v\u1ec1 hi\u1ec7u su\u1ea5t ch\u00ednh l\u00e0 v\u1ea5n \u0111\u1ec1 m\u00e0 b\u1ed1n c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n s\u1ebd gi\u1ea3i quy\u1ebft. Khi b\u1ea1n b\u00e1o gi\u00e1 cho vi\u1ec7c thay th\u1ebf \u0111\u00f3, vi\u1ec7c n\u00e2ng c\u1ea5p \u0111\u1ed9 ch\u00ednh x\u00e1c (t\u1eeb m\u1ee9c c\u00e0i \u0111\u1eb7t \u00b110% l\u00ean m\u1ee9c \u00b10,1%) v\u00e0 vi\u1ec7c lo\u1ea1i b\u1ecf vi\u1ec7c b\u1ea3o tr\u00ec van kim l\u00e0 nh\u1eefng l\u1ee3i \u00edch b\u00e1n th\u00eam ch\u00ednh \u0111\u00e1ng, kh\u00f4ng ph\u1ea3i l\u00e0 nh\u1eefng chi ti\u1ebft th\u1ed5i ph\u1ed3ng. Ch\u00fang xu\u1ea5t ph\u00e1t tr\u1ef1c ti\u1ebfp t\u1eeb nh\u1eefng kh\u00e1c bi\u1ec7t v\u1ec1 c\u01a1 ch\u1ebf \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp tr\u01b0\u1edbc \u0111\u00f3.<\/p>\n\n<p>Vi\u1ec7c s\u1eafp x\u1ebfp h\u00e0ng t\u1ed3n kho c\u0169ng tu\u00e2n theo logic t\u01b0\u01a1ng t\u1ef1. M\u1ed9t b\u1ed9 tr\u1ec5 b\u1eadt \u0111i\u1ec7n t\u1eed, m\u1ed9t b\u1ed9 tr\u1ec5 t\u1eaft \u0111i\u1ec7n t\u1eed v\u00e0 m\u1ed9t m\u1eabu DIP \u0111a ch\u1ee9c n\u0103ng n\u1eb1m gi\u1eefa hai lo\u1ea1i n\u00e0y c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng ph\u1ea7n l\u1edbn c\u00e1c y\u00eau c\u1ea7u tr\u00ean th\u1ecb tr\u01b0\u1eddng s\u1eeda ch\u1eefa. Thi\u1ebft b\u1ecb \u0111a ch\u1ee9c n\u0103ng n\u00e0y gi\u00fap g\u1ed9p b\u1ed1n khe ng\u0103n k\u00e9o th\u00e0nh m\u1ed9t SKU duy nh\u1ea5t. H\u00e3y s\u1eafp x\u1ebfp c\u00e1c ng\u0103n k\u00e9o theo t\u00ednh n\u0103ng ho\u1ea1t \u0111\u1ed9ng (ch\u1ee9c n\u0103ng v\u00e0 c\u00e1ch x\u1eed l\u00fd khi m\u1ea5t \u0111i\u1ec7n) thay v\u00ec d\u1ef1a tr\u00ean th\u01b0\u01a1ng hi\u1ec7u hay c\u00e1c nh\u00e3n hi\u1ec7u nh\u01b0 \u201ckh\u00ed n\u00e9n so v\u1edbi \u0111i\u1ec7n t\u1eed\u201d. Nh\u00e3n hi\u1ec7u ch\u1ec9 l\u00e0 chuy\u1ec7n c\u1ee7a qu\u00e1 kh\u1ee9; t\u00ednh n\u0103ng ho\u1ea1t \u0111\u1ed9ng m\u1edbi ch\u00ednh l\u00e0 s\u1ea3n ph\u1ea9m.<\/p>\n\n\n<div class=\"bp-cta-end bd-reveal\">\n <p class=\"bp-cta-end-ttl\"><span class=\"rich-ico\"><svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"m22 2-7 20-4-9-9-4Z\"\/><path d=\"M22 2 11 13\"\/><\/svg><\/span>H\u00e3y d\u1ef1 tr\u1eef s\u1eb5n c\u00e1c r\u01a1le tr\u1ec5 th\u1eddi gian m\u00e0 kh\u00e1ch h\u00e0ng c\u1ee7a b\u1ea1n th\u1ef1c s\u1ef1 y\u00eau c\u1ea7u<\/p>\n <p class=\"bp-cta-end-sub\">B\u1ea3y d\u00f2ng s\u1ea3n ph\u1ea9m r\u01a1-le \u2014 bao g\u1ed3m c\u1ea3 lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng tr\u1ec5 th\u1eddi gian \u2014 m\u1ed7i s\u1ea3n ph\u1ea9m thay th\u1ebf \u0111\u1ec1u t\u01b0\u01a1ng th\u00edch v\u1ec1 m\u1eabu m\u00e3 v\u00e0 k\u00e8m theo b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c g\u1eedi tr\u01b0\u1edbc khi qu\u00fd kh\u00e1ch \u0111\u1eb7t h\u00e0ng, trong m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m m\u00e0 qu\u00fd kh\u00e1ch c\u00f3 th\u1ec3 t\u1eadp trung mua t\u1eeb m\u1ed9t nh\u00e0 cung c\u1ea5p duy nh\u1ea5t.<\/p>\n <a class=\"bp-cta-end-btn\" href=\"https:\/\/www.omch.com\/vi\/contact\/\" target=\"_self\">H\u00e3y li\u00ean h\u1ec7 v\u1edbi OMCH \u0111\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 vi\u1ec7c cung c\u1ea5p thi\u1ebft b\u1ecb chuy\u1ec3n ti\u1ebfp<svg class=\"ico\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M5 12h14\"\/><path d=\"m12 5 7 7-7 7\"\/><\/svg><\/a>\n<\/div>\n\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n\n<ol class=\"bd-refs\">\n<li><a href=\"https:\/\/macromatic.com\/support\/knowledge-base-articles\/understanding-time-delay-relay-functions\/\" target=\"_blank\" rel=\"noopener\">Macromatic \u2014 Hi\u1ec3u v\u1ec1 c\u00e1c ch\u1ee9c n\u0103ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian<\/a>. 2026.<\/li>\n<li><a href=\"https:\/\/support.rockwellautomation.com\/app\/answers\/answer_view\/a_id\/24525\/~\/accuracy-of-timer-100-fpta180-when-being-used-with-700-cf-relays\/\" target=\"_blank\" rel=\"noopener\">C\u01a1 s\u1edf ki\u1ebfn th\u1ee9c c\u1ee7a Rockwell Automation \u2014 \u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a b\u1ed9 h\u1eb9n gi\u1edd 100-FPTA180 khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi r\u01a1le 700-CF<\/a>. 2020.<\/li>\n<li><a href=\"https:\/\/www.smcpneumatics.com\/airtimer.html\" target=\"_blank\" rel=\"noopener\">SMC Pneumatics \u2014 B\u1ed9 h\u1eb9n gi\u1edd kh\u00ed n\u00e9n \/ R\u01a1le tr\u1ec5 th\u1eddi gian<\/a>.<\/li>\n<li><a href=\"https:\/\/www.allaboutcircuits.com\/textbook\/digital\/chpt-5\/time-delay-relays\/\" target=\"_blank\" rel=\"noopener\">All About Circuits \u2014 R\u01a1le tr\u1ec5 th\u1eddi gian, S\u00e1ch gi\u00e1o khoa k\u1ef9 thu\u1eadt s\u1ed1 Ch\u01b0\u01a1ng 5<\/a>.<\/li>\n<li><a href=\"https:\/\/forumautomation.com\/t\/plc-mechanical-timing-relays\/3220\" target=\"_blank\" rel=\"noopener\">ForumAutomation \u2014 R\u01a1le h\u1eb9n gi\u1edd c\u01a1 h\u1ecdc cho PLC<\/a>.<\/li>\n<li><a href=\"https:\/\/www.reddit.com\/r\/engineering\/comments\/9tkbzg\/pneumatic_timer_contactors_vs_timer_relays\/\" target=\"_blank\" rel=\"noopener\">r\/engineering \u2014 So s\u00e1nh gi\u1eefa c\u00f4ng t\u1eafc h\u1eb9n gi\u1edd kh\u00ed n\u00e9n v\u00e0 r\u01a1le h\u1eb9n gi\u1edd \u0111i\u1ec1u khi\u1ec3n c\u00f4ng t\u1eafc<\/a>. 2018.<\/li>\n<li><a href=\"https:\/\/www.reddit.com\/r\/ElectricalEngineering\/comments\/1v3mojz\/question_about_offdelay_timer_operation_after\/\" target=\"_blank\" rel=\"noopener\">r\/ElectricalEngineering \u2014 C\u00e2u h\u1ecfi v\u1ec1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le h\u1eb9n gi\u1edd tr\u1ec5 t\u1eaft sau khi m\u1ea5t ho\u00e0n to\u00e0n ngu\u1ed3n c\u1ea5p \u0111i\u1ec7n<\/a>. 2026.<\/li>\n<li><a href=\"https:\/\/www.omch.com\/vi\/relay\/\" target=\"_blank\" rel=\"noopener\">OMCH \u2014 R\u01a1le, b\u1ea3y d\u00f2ng s\u1ea3n ph\u1ea9m<\/a>.<\/li>\n<li><a href=\"https:\/\/www.omch.com\/vi\/\" target=\"_blank\" rel=\"noopener\">OMCH \u2014 Nh\u00e0 cung c\u1ea5p linh ki\u1ec7n t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00f4ng nghi\u1ec7p<\/a>.<\/li>\n<\/ol>\n\n <\/article>\n<\/div>\n\n<\/body><\/html>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian: C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u0103m ch\u1ee9c n\u0103ng h\u1eb9n gi\u1edd v\u00e0 \u0111i\u1ec1u g\u00ec x\u1ea3y ra khi m\u1ea5t \u0111i\u1ec7n. H\u00e3y h\u1ecfi n\u0103m ngu\u1ed3n th\u00f4ng tin kh\u00e1c nhau v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a r\u01a1le tr\u1ec5 th\u1eddi gian, b\u1ea1n s\u1ebd nh\u1eadn \u0111\u01b0\u1ee3c n\u0103m c\u00e2u tr\u1ea3 l\u1eddi kh\u00e1c nhau. Kh\u00f4ng ph\u1ea3i v\u00ec h\u1ecd b\u1ea5t \u0111\u1ed3ng quan \u0111i\u1ec3m, m\u00e0 b\u1edfi v\u00ec h\u1ea7u h\u1ebft c\u00e1c l\u1eddi gi\u1ea3i th\u00edch \u0111\u1ec1u nh\u1ea7m l\u1eabn gi\u1eefa hai c\u00e2u h\u1ecfi ri\u00eang bi\u1ec7t: c\u00e1ch th\u1ee9c t\u1ea1o ra \u0111\u1ed9 tr\u1ec5 v\u1ec1 m\u1eb7t v\u1eadt l\u00fd, v\u00e0 c\u00e1ch th\u1ee9c [\u2026]<\/p>","protected":false},"author":4,"featured_media":12243,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"Time Delay Relay Working Principle: Types & Timing","_seopress_titles_desc":"Learn how time delay relays work, including on-delay, off-delay and interval timing, with wiring, testing and replacement guidance.","_seopress_robots_index":"","footnotes":""},"categories":[79],"tags":[],"class_list":["post-12240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mmlblog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/comments?post=12240"}],"version-history":[{"count":2,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240\/revisions"}],"predecessor-version":[{"id":12245,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/12240\/revisions\/12245"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/12243"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=12240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=12240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=12240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}