{"id":5925,"date":"2025-06-25T02:44:13","date_gmt":"2025-06-25T02:44:13","guid":{"rendered":"https:\/\/www.omch.com\/?p=5925"},"modified":"2025-06-25T03:28:11","modified_gmt":"2025-06-25T03:28:11","slug":"how-to-test-a-relay","status":"publish","type":"post","link":"https:\/\/www.omch.com\/vi\/how-to-test-a-relay\/","title":{"rendered":"C\u00e1ch ki\u1ec3m tra r\u01a1le nh\u01b0 m\u1ed9t chuy\u00ean gia: H\u01b0\u1edbng d\u1eabn to\u00e0n di\u1ec7n"},"content":{"rendered":"<figure class=\"wp-block-image size-full\"><img alt=\"\" fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay6.webp\" class=\"wp-image-5949\" srcset=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay6.webp 1024w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay6-300x225.webp 300w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay6-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>M\u1ed9t trong nh\u1eefng b\u1ed9 ph\u1eadn quan tr\u1ecdng nh\u1ea5t, nh\u01b0ng \u0111\u1ed3ng th\u1eddi l\u1ea1i t\u01b0\u01a1ng \u0111\u1ed1i \u00edt \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u1ee9c t\u1ea1p c\u1ee7a c\u1ea3 \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i l\u1eabn c\u00e1c m\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p c\u1ee1 l\u1edbn, ch\u00ednh l\u00e0 r\u01a1-le m\u1edbi. Lo\u1ea1i r\u01a1-le n\u00e0y c\u0169ng xu\u1ea5t hi\u1ec7n trong r\u1ea5t nhi\u1ec1u h\u1ec7 th\u1ed1ng kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 trong h\u1ec7 th\u1ed1ng nhi\u00ean li\u1ec7u d\u01b0\u1edbi d\u1ea1ng b\u01a1m tr\u00ean \u00f4 t\u00f4 hay d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n trong nh\u00e0 m\u00e1y. Khi r\u01a1-le b\u1ecb h\u1ecfng, n\u00f3 c\u00f3 th\u1ec3 bi\u1ec3u hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng m\u1ed9t s\u1ef1 c\u1ed1 nghi\u00eam tr\u1ecdng, kh\u00f3 hi\u1ec3u v\u00e0 d\u01b0\u1eddng nh\u01b0 r\u1ea5t nghi\u00eam tr\u1ecdng: xe kh\u00f4ng kh\u1edfi \u0111\u1ed9ng \u0111\u01b0\u1ee3c, \u0111\u00e8n kh\u00f4ng s\u00e1ng ho\u1eb7c m\u00e1y m\u00f3c kh\u00f4ng th\u1ec3 v\u1eadn h\u00e0nh. Th\u01b0\u1eddng th\u00ec nguy\u00ean nh\u00e2n l\u00e0 do m\u1ed9t b\u1ed9 ph\u1eadn nh\u1ecf, r\u1ebb ti\u1ec1n \u0111\u00e3 h\u1ebft tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng nh\u01b0ng l\u1ea1i b\u1ecb b\u1ecf qua. B\u00e0i vi\u1ebft n\u00e0y s\u1ebd gi\u1ea3i \u0111\u00e1p to\u00e0n di\u1ec7n v\u1ec1 c\u00e1ch ch\u1ea9n \u0111o\u00e1n r\u01a1le m\u1edbi. Ch\u00fang t\u00f4i s\u1ebd h\u01b0\u1edbng d\u1eabn quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc, r\u00f5 r\u00e0ng v\u00e0 th\u1ef1c t\u1ebf v\u1ec1 c\u00e1ch ki\u1ec3m tra b\u1ea5t k\u1ef3 lo\u1ea1i r\u01a1le th\u00f4ng d\u1ee5ng n\u00e0o v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a m\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean chuy\u00ean nghi\u1ec7p.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hi\u1ec3u r\u00f5 vai tr\u00f2 v\u00e0 c\u00e1c \u0111i\u1ec3m d\u1ec5 h\u1ecfng c\u1ee7a r\u01a1le<\/h2>\n\n\n\n<p>R\u01a1le v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ed9t c\u00f4ng t\u1eafc c\u01a1 \u0111i\u1ec7n. C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 l\u00e0 v\u00f4 c\u00f9ng th\u00f4ng minh, b\u1edfi v\u00ec n\u00f3 s\u1eed d\u1ee5ng vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n m\u1ed9t d\u00f2ng \u0111i\u1ec7n r\u1ea5t nh\u1ecf \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh m\u1ed9t d\u00f2ng \u0111i\u1ec7n t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn. H\u00e3y h\u00ecnh dung n\u00f3 nh\u01b0 m\u1ed9t n\u00fat b\u1ea5m tr\u00ean \u0111i\u1ec1u khi\u1ec3n t\u1eeb xa. T\u00edn hi\u1ec7u c\u00f4ng su\u1ea5t th\u1ea5p \u0111\u01b0\u1ee3c ph\u00e1t ra t\u1eeb m\u00e1y t\u00ednh ho\u1eb7c m\u1ed9t c\u00f4ng t\u1eafc \u0111\u01a1n tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, k\u00edch ho\u1ea1t m\u1ed9t nam ch\u00e2m \u0111i\u1ec7n nh\u1ecf b\u00ean trong r\u01a1le. Sau \u0111\u00f3, t\u1eeb tr\u01b0\u1eddng n\u00e0y s\u1ebd h\u00fat m\u1ed9t m\u1ea3nh kim lo\u1ea1i, g\u1ecdi l\u00e0 c\u00e1nh r\u01a1le, l\u00e0m \u0111\u00f3ng m\u1ed9t c\u00f4ng t\u1eafc c\u00f4ng su\u1ea5t l\u1edbn v\u00e0 cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n m\u1ea1nh ch\u1ea3y \u0111\u1ebfn m\u1ed9t t\u1ea3i l\u1edbn nh\u01b0 \u0111\u1ed9ng c\u01a1 kh\u1edfi \u0111\u1ed9ng, qu\u1ea1t l\u00e0m m\u00e1t ho\u1eb7c d\u00e3y \u0111\u00e8n. \u0110i\u1ec1u n\u00e0y gi\u00fap c\u00e1ch ly c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n nh\u1ea1y c\u1ea3m kh\u1ecfi m\u1ea1ch \u201ct\u1ea3i\u201d c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cao, t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 ch\u00fang kh\u1ecfi s\u1ef1 t\u0103ng \u00e1p \u0111\u1ed9t ng\u1ed9t v\u00e0 qu\u00e1 nhi\u1ec7t.<\/p>\n\n\n\n<p>M\u1eb7c d\u00f9 c\u00f3 thi\u1ebft k\u1ebf ch\u1eafc ch\u1eafn, r\u01a1le v\u1eabn c\u00f3 th\u1ec3 b\u1ecb m\u00f2n v\u00e0 cu\u1ed1i c\u00f9ng d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c. Hi\u1ec3u r\u00f5 c\u00e1c \u0111i\u1ec3m h\u1ecfng h\u00f3c th\u01b0\u1eddng g\u1eb7p l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n hi\u1ec7u qu\u1ea3.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ch\u00e1y cu\u1ed9n d\u00e2y:<\/strong> D\u00e2y m\u1ea3nh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t cu\u1ed9n d\u00e2y \u0111i\u1ec7n t\u1eeb n\u1eb1m b\u00ean trong. Lo\u1ea1i d\u00e2y n\u00e0y c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ee9t ho\u1eb7c ch\u1eadp m\u1ea1ch do t\u00ecnh tr\u1ea1ng qu\u00e1 \u00e1p ho\u1eb7c do m\u1ed9t s\u1ed1 l\u1ed7i s\u1ea3n xu\u1ea5t \u0111\u01a1n gi\u1ea3n, khi\u1ebfn cu\u1ed9n d\u00e2y kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 t\u1ea1o ra t\u1eeb tr\u01b0\u1eddng c\u1ea7n thi\u1ebft nh\u1eb1m c\u1ea5p \u0111i\u1ec7n cho c\u00f4ng t\u1eafc.<\/li>\n\n\n\n<li><strong>L\u1ed7 r\u1ed7 do ti\u1ebfp x\u00fac ho\u1eb7c do h\u00e0n:<\/strong> Trong m\u1ed7i chu k\u1ef3 b\u1eadt v\u00e0 t\u1eaft, r\u01a1le duy tr\u00ec m\u1ed9t tia l\u1eeda \u0111i\u1ec7n nh\u1ecf gi\u1eefa c\u00e1c ti\u1ebfp \u0111i\u1ec3m. V\u1eadt li\u1ec7u ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 b\u1ecb ch\u00e1y m\u1ea5t trong tia l\u1eeda n\u00e0y sau v\u00e0i ngh\u00ecn chu k\u1ef3 do m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cao, khi\u1ebfn ch\u00fang d\u1ec5 h\u00ecnh th\u00e0nh c\u00e1c v\u1ebft l\u00f5m v\u00e0 b\u1ec1 m\u1eb7t c\u00f3 \u0111i\u1ec7n tr\u1edf cao, l\u00e0m ch\u1eadm d\u00f2ng \u0111i\u1ec7n. Hi\u1ebfm khi h\u01a1n, m\u1ed9t d\u00f2ng \u0111i\u1ec7n \u0111\u1ed9t bi\u1ebfn r\u1ea5t l\u1edbn (v\u00ed d\u1ee5: do \u0111\u1ed9ng c\u01a1 b\u1ecb ch\u1eadp m\u1ea1ch) th\u1eadm ch\u00ed c\u00f3 th\u1ec3 l\u00e0m ch\u1ea3y c\u00e1c ti\u1ebfp \u0111i\u1ec3m, h\u00e0n ch\u00fang l\u1ea1i v\u1edbi nhau v\u0129nh vi\u1ec5n \u1edf tr\u1ea1ng th\u00e1i m\u1edf ho\u1eb7c tr\u1ea1ng th\u00e1i \u0111\u00f3ng t\u00f9y thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed ti\u1ebfp x\u00fac t\u1ee9c th\u1eddi; c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 m\u1edf khi \u0111ang t\u00ecm ki\u1ebfm tr\u1ea1ng th\u00e1i \u0111\u00f3ng ho\u1eb7c ng\u01b0\u1ee3c l\u1ea1i.<\/li>\n\n\n\n<li><strong>Qu\u00e1 tr\u00ecnh oxy h\u00f3a\/\u0103n m\u00f2n do ti\u1ebfp x\u00fac:<\/strong> C\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac c\u00f3 b\u1ec1 m\u1eb7t kim lo\u1ea1i d\u1ec5 b\u1ecb oxy h\u00f3a v\u00e0 \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c kh\u1eafc nghi\u1ec7t. L\u1edbp m\u00e0ng \u0103n m\u00f2n m\u1ecfng n\u00e0y t\u1ea1o th\u00e0nh m\u1ed9t l\u1edbp c\u00e1ch \u0111i\u1ec7n, ng\u0103n ch\u1eb7n d\u00f2ng \u0111i\u1ec7n \u0111i qua ngay c\u1ea3 khi c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac c\u01a1 h\u1ecdc gi\u1eefa c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le v\u1eabn \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/li>\n\n\n\n<li><strong>S\u1ef1 c\u1ed1 c\u01a1 kh\u00ed b\u00ean trong:<\/strong> R\u01a1le c\u00f3 c\u00e1c b\u1ed9 ph\u1eadn chuy\u1ec3n \u0111\u1ed9ng. Tr\u1ee5c xoay c\u1ee7a c\u00e1nh r\u01a1le c\u00f3 th\u1ec3 b\u1ecb m\u00f2n, khi\u1ebfn c\u00f4ng t\u1eafc kh\u00f4ng m\u1edf ho\u1eb7c \u0111\u00f3ng \u0111\u01b0\u1ee3c. L\u00f2 xo h\u1ed3i v\u1ecb c\u00f3 th\u1ec3 b\u1ecb \u0111\u1ee9t, d\u1eabn \u0111\u1ebfn vi\u1ec7c c\u00f4ng t\u1eafc kh\u00f4ng \u0111\u00f3ng ho\u1eb7c m\u1edf \u0111\u01b0\u1ee3c.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e1c d\u1ee5ng c\u1ee5 c\u1ea7n thi\u1ebft v\u00e0 an to\u00e0n l\u00e0 tr\u00ean h\u1ebft<\/h2>\n\n\n\n<p>Vi\u1ec7c ch\u1ea9n \u0111o\u00e1n ch\u00ednh x\u00e1c \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 trang thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p v\u00e0 tinh th\u1ea7n cam k\u1ebft \u0111\u1ea3m b\u1ea3o an to\u00e0n. N\u1ebfu ki\u1ec3m tra c\u00e1c b\u1ed9 ph\u1eadn \u0111i\u1ec7n theo c\u00e1ch kh\u00f4ng \u0111\u00fang, c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng cho xe ho\u1eb7c th\u1eadm ch\u00ed khi\u1ebfn b\u1ea3n th\u00e2n b\u1ecb th\u01b0\u01a1ng. C\u00e1c d\u1ee5ng c\u1ee5 c\u1ea7n thi\u1ebft ph\u1ea3i d\u1ec5 s\u1eed d\u1ee5ng v\u00e0 s\u1eb5n s\u00e0ng \u0111\u1ec3 \u0111\u01b0a v\u00e0o s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>C\u00f4ng c\u1ee5<\/td><td>M\u00f4 t\u1ea3<\/td><\/tr><tr><td>M\u00e1y \u0111o \u0111a n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1<\/td><td>C\u00f4ng c\u1ee5 ch\u1ea9n \u0111o\u00e1n ch\u00ednh. Ph\u1ea3i ti\u1ebfn h\u00e0nh c\u00e1c b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf (Ohms) v\u00e0 t\u00ednh li\u00ean t\u1ee5c \u0111\u1ec3 ki\u1ec3m tra t\u00ecnh tr\u1ea1ng b\u00ean trong cu\u1ed9n d\u00e2y v\u00e0 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le.<\/td><\/tr><tr><td>D\u00e2y n\u1ed1i<\/td><td>\u00cdt nh\u1ea5t m\u1ed9t c\u1eb7p d\u00e2y k\u1eb9p c\u00e1 s\u1ea5u, \u0111\u1ec3 k\u1ebft n\u1ed1i an to\u00e0n ngu\u1ed3n \u0111i\u1ec7n t\u1eeb ngu\u1ed3n b\u00ean ngo\u00e0i v\u1edbi cu\u1ed9n d\u00e2y r\u01a1le nh\u1eb1m k\u00edch ho\u1ea1t r\u01a1le \u0111\u1ec3 ki\u1ec3m tra.<\/td><\/tr><tr><td>Ngu\u1ed3n \u0111i\u1ec7n<\/td><td>Pin 9V l\u00e0 linh ki\u1ec7n l\u00fd t\u01b0\u1edfng \u0111\u1ec3 c\u1ea5p ngu\u1ed3n an to\u00e0n cho ph\u1ea7n l\u1edbn c\u00e1c r\u01a1le \u00f4 t\u00f4 12V tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c. Tuy nhi\u00ean, c\u1ea7n h\u1ebft s\u1ee9c th\u1eadn tr\u1ecdng khi s\u1eed d\u1ee5ng \u1eafc-quy \u00f4 t\u00f4 \u0111\u00e3 s\u1ea1c \u0111\u1ea7y.<\/td><\/tr><tr><td>K\u00ecm th\u00e1o r\u01a1-le<\/td><td>M\u1ed9t d\u1ee5ng c\u1ee5 kh\u00f4ng b\u1eaft bu\u1ed9c nh\u01b0ng r\u1ea5t n\u00ean s\u1eed d\u1ee5ng. D\u1ee5ng c\u1ee5 n\u00e0y gi\u00fap b\u1ea1n c\u00f3 th\u1ec3 c\u1ea7m v\u00e0 th\u00e1o c\u00e1c r\u01a1le ra kh\u1ecfi h\u1ed9p c\u1ea7u ch\u00ec m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng v\u1ecf nh\u1ef1a c\u1ee7a ch\u00fang.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><strong>C\u1ea2NH B\u00c1O: QUY TR\u00ccNH AN TO\u00c0N<\/strong><\/p>\n\n\n\n<p>Kh\u00f4ng \u0111\u01b0\u1ee3c thao t\u00e1c v\u1edbi b\u1ea5t k\u1ef3 b\u1ed9 ph\u1eadn \u0111i\u1ec7n n\u00e0o c\u1ee7a xe \u00f4 t\u00f4 ho\u1eb7c th\u00e1o c\u00e1c r\u01a1-le ra kh\u1ecfi xe m\u00e0 kh\u00f4ng ng\u1eaft k\u1ebft n\u1ed1i c\u1ef1c \u00e2m c\u1ee7a \u1eafc-quy tr\u01b0\u1edbc. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh hi\u1ec7n t\u01b0\u1ee3ng ch\u1eadp \u0111i\u1ec7n, v\u1ed1n c\u00f3 th\u1ec3 x\u1ea3y ra do v\u00f4 \u00fd v\u00e0 khi\u1ebfn c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ea1y c\u1ea3m, nh\u01b0 B\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 (ECU), b\u1ecb h\u1ecfng ho\u1eb7c g\u00e2y ch\u00e1y.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img alt=\"\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay5.webp\" class=\"wp-image-5948\" srcset=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay5.webp 1024w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay5-300x225.webp 300w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay5-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">\u201c\u0110\u1ed5i trong 1 ph\u00fat\u201d: B\u00e0i ki\u1ec3m tra nhanh nh\u1ea5t d\u00e0nh cho b\u1ea1n<\/h2>\n\n\n\n<p>Th\u1eed nghi\u1ec7m ho\u00e1n \u0111\u1ed5i l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ch\u1ea9n \u0111o\u00e1n hi\u1ec7u qu\u1ea3 nh\u1ea5t m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi d\u00f9ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng. \u0110\u00e2y l\u00e0 ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra m\u1ea1ch \u0111i\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u1ed9t thi\u1ebft b\u1ecb \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng l\u00e0m \u0111\u1ed1i ch\u1ee9ng d\u01b0\u01a1ng cho m\u1ea1ch. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y r\u1ea5t hi\u1ec7u qu\u1ea3 v\u00e0 kh\u00f4ng c\u1ea7n d\u00f9ng \u0111\u1ebfn b\u1ea5t k\u1ef3 d\u1ee5ng c\u1ee5 n\u00e0o, ngo\u1ea1i tr\u1eeb tay ho\u1eb7c d\u1ee5ng c\u1ee5 th\u00e1o r\u01a1-le.<\/p>\n\n\n\n<p>Nguy\u00ean l\u00fd r\u1ea5t \u0111\u01a1n gi\u1ea3n: trong h\u1ea7u h\u1ebft c\u00e1c h\u1ed9p c\u1ea7u ch\u00ec c\u1ee7a xe, s\u1ebd c\u00f3 m\u1ed9t s\u1ed1 r\u01a1-le gi\u1ed1ng h\u1ec7t nhau, m\u1ed7i r\u01a1-le \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ed9t m\u1ea1ch \u0111i\u1ec7n kh\u00e1c nhau. V\u00ed d\u1ee5, r\u01a1-le c\u00f2i c\u00f3 th\u1ec3 gi\u1ed1ng h\u1ec7t r\u01a1-le ly h\u1ee3p \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed ho\u1eb7c r\u01a1-le b\u01a1m nhi\u00ean li\u1ec7u.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>X\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed r\u01a1le nghi ng\u1edd:<\/strong> \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a r\u01a1le nghi ng\u1edd, h\u00e3y tham kh\u1ea3o s\u00e1ch h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng xe ho\u1eb7c t\u00ecm s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n \u1edf m\u1eb7t trong n\u1eafp h\u1ed9p c\u1ea7u ch\u00ec.<\/li>\n\n\n\n<li><strong>X\u00e1c \u0111\u1ecbnh m\u1ed9t r\u01a1le gi\u1ed1ng h\u1ec7t:<\/strong> Trong c\u00f9ng m\u1ed9t h\u1ed9p c\u1ea7u ch\u00ec \u0111\u00f3 h\u1eb3n ph\u1ea3i c\u00f3 m\u1ed9t r\u01a1le kh\u00e1c c\u00f3 c\u00f9ng m\u00e3 s\u1ea3n ph\u1ea9m v\u00e0 s\u1ed1 ch\u00e2n. H\u00e3y ch\u1ecdn m\u1ed9t r\u01a1le t\u1eeb m\u1ed9t m\u1ea1ch \u0111i\u1ec7n kh\u00f4ng quan tr\u1ecdng nh\u01b0ng c\u00f3 th\u1ec3 ki\u1ec3m tra d\u1ec5 d\u00e0ng, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u1ea1ch c\u00f2i.<\/li>\n\n\n\n<li><strong>Th\u1ef1c hi\u1ec7n thao t\u00e1c ho\u00e1n \u0111\u1ed5i:<\/strong> H\u00e3y th\u00e1o r\u01a1-le nghi ng\u1edd ra m\u1ed9t c\u00e1ch c\u1ea9n th\u1eadn. Ti\u1ebfp theo, l\u1ea5y r\u01a1-le \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t, th\u00e1o n\u00f3 ra kh\u1ecfi m\u1ea1ch c\u1ee7a c\u00f2i v\u00e0 l\u1eafp v\u00e0o \u1ed5 c\u1eafm c\u1ee7a r\u01a1-le th\u1eed nghi\u1ec7m. L\u1eafp r\u01a1-le nghi ng\u1edd v\u00e0o \u1ed5 c\u1eafm c\u1ee7a c\u00f2i.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra c\u00e1c m\u1ea1ch \u0111i\u1ec7n:<\/strong> H\u00e3y th\u1eed c\u1ea5p \u0111i\u1ec7n l\u1ea1i cho m\u1ea1ch \u0111i\u1ec7n \u0111\u00e3 b\u1ecb h\u1ecfng ban \u0111\u1ea7u. N\u1ebfu l\u00fac n\u00e0y m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, \u0111i\u1ec1u \u0111\u00f3 ch\u1ee9ng t\u1ecf ch\u1eafc ch\u1eafn r\u1eb1ng r\u01a1-le ban \u0111\u1ea7u \u0111\u00e3 b\u1ecb h\u1ecfng. H\u00e3y d\u00f9ng c\u00f2i l\u00e0m b\u01b0\u1edbc x\u00e1c nh\u1eadn cu\u1ed1i c\u00f9ng. N\u1ebfu l\u00fac n\u00e0y c\u00f2i kh\u00f4ng k\u00eau, b\u1ea1n s\u1ebd c\u00e0ng ch\u1eafc ch\u1eafn h\u01a1n.<\/li>\n<\/ol>\n\n\n\n<p>Th\u1eed nghi\u1ec7m n\u00e0y s\u1ebd l\u00e0 m\u1ed9t c\u00e1ch nhanh g\u1ecdn \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c l\u1ed7i n\u1eb1m \u1edf ch\u00ednh r\u01a1le, t\u1eeb \u0111\u00f3 ti\u1ebft ki\u1ec7m r\u1ea5t nhi\u1ec1u th\u1eddi gian ch\u1ea9n \u0111o\u00e1n. N\u1ebfu v\u1ea5n \u0111\u1ec1 ban \u0111\u1ea7u v\u1eabn ch\u01b0a \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft khi s\u1eed d\u1ee5ng r\u01a1le \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t, th\u00ec r\u01a1le \u0111\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 nguy\u00ean nh\u00e2n g\u00e2y ra s\u1ef1 c\u1ed1; nguy\u00ean nh\u00e2n n\u1eb1m \u1edf m\u1ed9t b\u1ed9 ph\u1eadn kh\u00e1c trong h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n, c\u1ea7u ch\u00ec ho\u1eb7c c\u00f4ng t\u1eafc \u0111i\u1ec1u khi\u1ec3n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc: Ki\u1ec3m tra tr\u00ean b\u00e0n th\u00ed nghi\u1ec7m b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng<\/h2>\n\n\n\n<p>Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng th\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra ho\u00e1n \u0111\u1ed5i ho\u1eb7c khi b\u1ea1n mu\u1ed1n c\u00f3 s\u1ef1 \u0111\u1ea3m b\u1ea3o tuy\u1ec7t \u0111\u1ed1i r\u1eb1ng r\u01a1le c\u00f3 v\u1ea5n \u0111\u1ec1, th\u00ec c\u1ea7n ph\u1ea3i ki\u1ec3m tra r\u01a1le b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1 tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c. Quy tr\u00ecnh ki\u1ec3m tra n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n d\u1ef1a tr\u00ean hai m\u1ea1ch n\u1ed9i b\u1ed9 ch\u00ednh, m\u1ed9t l\u00e0 m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n (cu\u1ed9n d\u00e2y) v\u00e0 hai l\u00e0 m\u1ea1ch ngu\u1ed3n (ti\u1ebfp \u0111i\u1ec3m).<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">C\u00e1ch \u0111\u1ecdc c\u00e1c ch\u00e2n c\u1eafm<\/h3>\n\n\n\n<p>Ph\u1ea7n l\u1edbn c\u00e1c lo\u1ea1i \u00f4 t\u00f4 \u0111\u1ec1u s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng \u0111\u00e1nh s\u1ed1 ti\u00eau chu\u1ea9n tr\u00ean c\u00e1c r\u01a1-le \u00f4 t\u00f4, \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u01a1 \u0111\u1ed3 ch\u00e2n c\u1eafm Bosch, th\u01b0\u1eddng \u0111\u01b0\u1ee3c in c\u1ed1 \u0111\u1ecbnh tr\u00ean ch\u00ednh v\u1ecf r\u01a1-le. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00e0 c\u1ea7n ph\u1ea3i hi\u1ec3u r\u00f5.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ch\u00e2n 85 v\u00e0 ch\u00e2n 86:<\/strong> Khi s\u1eed d\u1ee5ng c\u1ef1c \u0111\u1ea5t ngu\u1ed3n, ngu\u1ed3n \u0111i\u1ec7n s\u1ebd \u0111\u01b0\u1ee3c c\u1ea5p v\u00e0o hai ch\u00e2n n\u00e0y v\u00e0 k\u00edch ho\u1ea1t \u0111i\u1ec7n t\u1eeb. H\u1ea7u h\u1ebft c\u00e1c r\u01a1le th\u00f4ng th\u01b0\u1eddng kh\u00f4ng ph\u00e2n bi\u1ec7t c\u1ef1c t\u00ednh, nh\u01b0ng m\u1ed9t s\u1ed1 lo\u1ea1i c\u00f3 t\u00edch h\u1ee3p c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 b\u1eb1ng \u0111i-\u1ed1t b\u00ean trong v\u00e0 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u; \u0111\u1ed1i v\u1edbi nh\u1eefng lo\u1ea1i n\u00e0y, ch\u00e2n 86 l\u00e0 c\u1ef1c d\u01b0\u01a1ng v\u00e0 ch\u00e2n 85 l\u00e0 c\u1ef1c \u00e2m.<\/li>\n\n\n\n<li><strong>Ch\u00e2n 30:<\/strong> \u0110\u00f3 l\u00e0 \u0111i\u1ec3m ti\u1ebfp x\u00fac chung. M\u1ea1ch \u0111i\u1ec7n c\u00f4ng su\u1ea5t c\u01b0\u1eddng \u0111\u1ed9 cao nh\u1eadn t\u00edn hi\u1ec7u n\u00e0y l\u00e0m \u0111\u1ea7u v\u00e0o.<\/li>\n\n\n\n<li><strong>Ch\u00e2n 87:<\/strong> \u0110\u00e2y l\u00e0 ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf (NO). Khi t\u1eaft, ch\u00e2n 30 v\u00e0 ch\u00e2n 87 kh\u00f4ng \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi nhau. Khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, c\u00f4ng t\u1eafc \u0111\u00f3ng l\u1ea1i v\u00e0 ch\u00e2n 30 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi ch\u00e2n 87.<\/li>\n\n\n\n<li><strong>Ch\u00e2n 87a:<\/strong> \u0110\u00e2y l\u00e0 ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng \u0111\u00f3ng (NC), ch\u1ec9 c\u00f3 tr\u00ean c\u00e1c r\u01a1le 5 ch\u00e2n. \u1ede tr\u1ea1ng th\u00e1i ngh\u1ec9, ch\u00e2n 30 n\u1ed1i v\u1edbi ch\u00e2n 87a. K\u1ebft n\u1ed1i n\u00e0y b\u1ecb ng\u1eaft khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img alt=\"\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay3.webp\" class=\"wp-image-5947\" srcset=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay3.webp 1024w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay3-300x225.webp 300w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay3-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u1eed nghi\u1ec7m 1: Ki\u1ec3m tra m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n (cu\u1ed9n d\u00e2y)<\/h3>\n\n\n\n<p>Th\u1eed nghi\u1ec7m n\u00e0y gi\u00fap x\u00e1c \u0111\u1ecbnh xem nam ch\u00e2m \u0111i\u1ec7n b\u00ean trong c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u1ec1 m\u1eb7t \u0111i\u1ec7n hay kh\u00f4ng.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Chuy\u1ec3n \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1 c\u1ee7a b\u1ea1n sang ch\u1ebf \u0111\u1ed9 \u0111o \u0111i\u1ec7n tr\u1edf, th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng k\u00fd hi\u1ec7u (Ohm) ho\u1eb7c Omega (\u03a9). S\u1eed d\u1ee5ng d\u1ea3i \u0111o 200 ho\u1eb7c 2k.<\/li>\n\n\n\n<li>K\u1ebft n\u1ed1i \u0111\u1ea7u d\u00f2 \u0111\u1ea7u ti\u00ean c\u1ee7a \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng v\u1edbi ch\u00e2n 85, c\u00f2n \u0111\u1ea7u d\u00f2 th\u1ee9 hai c\u1ee7a \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng v\u1edbi ch\u00e2n 86.<\/li>\n\n\n\n<li>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c. Gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c tr\u00ean cu\u1ed9n d\u00e2y r\u01a1-le c\u00f2n t\u1ed1t n\u00ean n\u1eb1m trong kho\u1ea3ng t\u1eeb 50 \u0111\u1ebfn 120 Ohm \u0111\u1ed1i v\u1edbi cu\u1ed9n d\u00e2y r\u01a1-le 12V.<\/li>\n\n\n\n<li><strong>Gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3:<\/strong>\n<ol class=\"wp-block-list\">\n<li>Khi quay s\u1ed1 trong ph\u1ea1m vi n\u00e0y, cu\u1ed9n d\u00e2y v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/li>\n\n\n\n<li>Khi \u0111\u1ed3ng h\u1ed3 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf ch\u1ebf \u0111\u1ed9 OL (M\u1ea1ch h\u1edf) ho\u1eb7c hi\u1ec3n th\u1ecb \u0111i\u1ec7n tr\u1edf v\u00f4 h\u1ea1n, d\u00e2y b\u00ean trong cu\u1ed9n d\u00e2y \u0111\u00e3 b\u1ecb \u0111\u1ee9t. R\u01a1le b\u1ecb h\u1ecfng.<\/li>\n\n\n\n<li>Khi m\u00e0n h\u00ecnh \u0111\u1ed3ng h\u1ed3 hi\u1ec3n th\u1ecb gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf r\u1ea5t th\u1ea5p (g\u1ea7n 0 Ohm), \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 cu\u1ed9n d\u00e2y b\u1ecb \u0111o\u1ea3n m\u1ea1ch. R\u01a1le b\u1ecb h\u1ecfng.<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">Th\u1eed nghi\u1ec7m 2: Ki\u1ec3m tra m\u1ea1ch ngu\u1ed3n (c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac)<\/h3>\n\n\n\n<p>Th\u1eed nghi\u1ec7m n\u00e0y ki\u1ec3m tra c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f4ng t\u1eafc c\u00f4ng su\u1ea5t cao \u1edf ch\u1ebf \u0111\u1ed9 m\u1eb7c \u0111\u1ecbnh.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>Chuy\u1ec3n \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng sang ch\u1ebf \u0111\u1ed9 ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c. Ch\u1ebf \u0111\u1ed9 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng bi\u1ec3u t\u01b0\u1ee3ng \u0111i-\u1ed1t ho\u1eb7c s\u00f3ng \u00e2m. Trong ch\u1ebf \u0111\u1ed9 n\u00e0y, \u0111\u1ed3ng h\u1ed3 s\u1ebd ph\u00e1t ra ti\u1ebfng b\u00edp khi ph\u00e1t hi\u1ec7n m\u1ea1ch \u0111i\u1ec7n ho\u00e0n ch\u1ec9nh (\u0111i\u1ec7n tr\u1edf th\u1ea5p nh\u1ea5t).<\/li>\n\n\n\n<li><strong>\u0110\u1ed1i v\u1edbi r\u01a1-le 5 ch\u00e2n:<\/strong> C\u00e1c \u0111\u1ea7u d\u00f2 \u0111\u01b0\u1ee3c ch\u1ea1m v\u00e0o gi\u1eefa ch\u00e2n 30 v\u00e0 ch\u00e2n 87a. M\u00e1y \u0111o s\u1ebd ph\u00e1t ra ti\u1ebfng b\u00edp \u0111\u1ec3 b\u00e1o hi\u1ec7u r\u1eb1ng k\u1ebft n\u1ed1i \u2013 v\u1ed1n th\u01b0\u1eddng \u1edf tr\u1ea1ng th\u00e1i h\u1edf \u2013 \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/li>\n\n\n\n<li><strong>\u0110\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c r\u01a1le:<\/strong> \u0110\u1eb7t c\u00e1c \u0111\u1ea7u d\u00f2 ti\u1ebfp x\u00fac v\u1edbi ch\u00e2n 30 v\u00e0 ch\u00e2n 87. M\u00e1y \u0111o s\u1ebd kh\u00f4ng ph\u00e1t ra ti\u1ebfng k\u00eau n\u00e0o, \u0111i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf r\u1eb1ng m\u1ea1ch th\u01b0\u1eddng m\u1edf th\u1ef1c s\u1ef1 \u0111ang \u1edf tr\u1ea1ng th\u00e1i m\u1edf.<\/li>\n<\/ol>\n\n\n\n<p>N\u1ebfu m\u1ed9t trong c\u00e1c b\u00e0i ki\u1ec3m tra n\u00e0y cho k\u1ebft qu\u1ea3 kh\u00f4ng \u0111\u1ea1t y\u00eau c\u1ea7u, v\u00ed d\u1ee5 nh\u01b0 b\u1ea1n ph\u00e1t hi\u1ec7n c\u00f3 t\u00ednh li\u00ean t\u1ee5c trong kho\u1ea3ng t\u1eeb 30 \u0111\u1ebfn 87 khi thi\u1ebft b\u1ecb \u1edf tr\u1ea1ng th\u00e1i ngh\u1ec9, th\u00ec c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a r\u01a1le \u0111\u00e3 b\u1ecb ch\u1eadp m\u1ea1ch ho\u1eb7c d\u00ednh ch\u1eb7t b\u00ean trong. R\u01a1le \u0111\u00e3 h\u1ecfng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">K\u00edch ho\u1ea1t r\u01a1le \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra tr\u1ef1c ti\u1ebfp<\/h2>\n\n\n\n<p>M\u1ed9t r\u01a1le v\u01b0\u1ee3t qua c\u00e1c b\u00e0i ki\u1ec3m tra t\u0129nh tr\u00ean b\u00e0n th\u1eed ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra khi c\u00f3 ngu\u1ed3n \u0111i\u1ec7n. B\u00e0i ki\u1ec3m tra cu\u1ed1i c\u00f9ng nh\u1eb1m \u0111\u1ea3m b\u1ea3o r\u1eb1ng nam ch\u00e2m \u0111i\u1ec7n c\u00f3 l\u1ef1c \u0111\u1ee7 m\u1ea1nh kh\u00f4ng ch\u1ec9 \u0111\u1ec3 di chuy\u1ec3n c\u00f4ng t\u1eafc v\u1ec1 m\u1eb7t v\u1eadt l\u00fd m\u00e0 c\u00f2n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a c\u00f4ng t\u1eafc c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn d\u00f2ng \u0111i\u1ec7n.<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>H\u00e3y chu\u1ea9n b\u1ecb ngu\u1ed3n \u0111i\u1ec7n c\u1ee7a b\u1ea1n.<\/strong> Ph\u01b0\u01a1ng ph\u00e1p an to\u00e0n nh\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t l\u00e0 s\u1eed d\u1ee5ng pin 9V. N\u1ed1i c\u00e1c d\u00e2y n\u1ed1i t\u1ea1m v\u00e0o c\u00e1c c\u1ef1c c\u1ee7a pin.<\/li>\n\n\n\n<li><strong>C\u1ea5p \u0111i\u1ec7n cho cu\u1ed9n d\u00e2y.<\/strong> N\u1ed1i \u0111\u1ea7u d\u00e2y n\u1ed1i d\u01b0\u01a1ng v\u00e0o ch\u00e2n 86, sau \u0111\u00f3 n\u1ed1i \u0111\u1ea7u d\u00e2y n\u1ed1i \u00e2m v\u00e0o ch\u00e2n 85.<\/li>\n\n\n\n<li><strong>H\u00e3y xem v\u00e0 l\u1eafng nghe ti\u1ebfng \u201cClick\u201d.<\/strong> Ngay khi b\u1ea1n k\u1ebft n\u1ed1i xong, h\u00e3y th\u1eed l\u1eafng nghe xem c\u00f3 ti\u1ebfng \u201cl\u00e1ch t\u00e1ch\u201d n\u00e0o kh\u00f4ng \u2013 \u00e2m thanh n\u00e0y ph\u1ea3i \u0111\u01b0\u1ee3c ph\u00e1t ra nh\u01b0 m\u1ed9t ti\u1ebfng \u201cl\u00e1ch t\u00e1ch\u201d s\u1eafc n\u00e9t. \u0110\u00f3 ch\u00ednh l\u00e0 ti\u1ebfng \u201cl\u00e1ch t\u00e1ch\u201d c\u1ee7a ph\u1ea7n l\u00f5i b\u00ean trong. N\u1ebfu nghe th\u1ea5y ti\u1ebfng \u201cl\u00e1ch t\u00e1ch\u201d r\u00f5 r\u00e0ng, ti\u1ebfng \u201cl\u00e1ch t\u00e1ch\u201d r\u1ea5t y\u1ebfu ho\u1eb7c ti\u1ebfng vo ve, th\u00ec \u0111\u00f3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a s\u1ef1 c\u1ed1 c\u01a1 kh\u00ed \u1edf r\u01a1le.<\/li>\n\n\n\n<li><strong>Th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c k\u1ebft n\u1ed1i khi h\u1ec7 th\u1ed1ng \u0111ang \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n. <\/strong>L\u1eb7p l\u1ea1i th\u00ed nghi\u1ec7m ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c nh\u01b0 l\u1ea7n tr\u01b0\u1edbc, trong khi v\u1eabn c\u1ea5p ngu\u1ed3n cho c\u00e1c ch\u00e2n 85 v\u00e0 86.<\/li>\n\n\n\n<li><strong>D\u00f9ng hai \u0111\u1ea7u d\u00f2 c\u1ee7a \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng ch\u1ea1m v\u00e0o ch\u00e2n 30 v\u00e0 ch\u00e2n 87. <\/strong>L\u00fac n\u00e0y, \u0111\u1ed3ng h\u1ed3 \u0111o s\u1ebd ph\u00e1t ra ti\u1ebfng b\u00edp khi \u1edf ch\u1ebf \u0111\u1ed9 cao \u0111\u1ec3 b\u00e1o hi\u1ec7u r\u1eb1ng m\u1ea1ch th\u01b0\u1eddng m\u1edf hi\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u00f3ng \u0111\u00fang c\u00e1ch.<\/li>\n\n\n\n<li>N\u1ebfu b\u1ea1n \u0111ang s\u1eed d\u1ee5ng r\u01a1le 5 ch\u00e2n, h\u00e3y n\u1ed1i c\u00e1c \u0111\u1ea7u d\u00f2 v\u00e0o ch\u00e2n 30 v\u00e0 87a. L\u00fac n\u00e0y, \u0111\u1ed3ng h\u1ed3 \u0111o s\u1ebd ng\u1eebng k\u00eau, \u0111i\u1ec1u n\u00e0y ch\u1ee9ng t\u1ecf m\u1ea1ch th\u01b0\u1eddng \u0111\u00f3ng \u0111\u00e3 m\u1edf \u0111\u00fang c\u00e1ch.<\/li>\n<\/ol>\n\n\n\n<p>N\u1ebfu r\u01a1le ph\u00e1t ra ti\u1ebfng l\u00e1ch c\u00e1ch v\u00e0 v\u01b0\u1ee3t qua c\u00e1c b\u00e0i ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c d\u01b0\u1edbi \u0111i\u1ec7n n\u00e0y, th\u00ec n\u00f3 \u0111ang ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3 v\u00e0 t\u00ecm ki\u1ebfm m\u1ed9t s\u1ea3n ph\u1ea9m thay th\u1ebf ch\u1ea5t l\u01b0\u1ee3ng<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img alt=\"\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay2.webp\" class=\"wp-image-5946\" srcset=\"https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay2.webp 1024w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay2-300x225.webp 300w, https:\/\/www.omch.com\/wp-content\/uploads\/2025\/06\/how-to-test-a-relay2-768x576.webp 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Lo\u1ea1t x\u00e9t nghi\u1ec7m n\u00e0y cung c\u1ea5p m\u1ed9t b\u1ee9c tranh ch\u1ea9n \u0111o\u00e1n to\u00e0n di\u1ec7n. H\u00e3y s\u1eed d\u1ee5ng b\u1ea3ng n\u00e0y \u0111\u1ec3 \u0111\u01b0a ra k\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>B\u01b0\u1edbc ki\u1ec3m th\u1eed<\/td><td>K\u1ebft qu\u1ea3 d\u1ef1 ki\u1ebfn<\/td><td>K\u1ebft qu\u1ea3 sai<\/td><td>Ch\u1ea9n \u0111o\u00e1n<\/td><\/tr><tr><td>\u0110i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y<\/td><td>50\u2013120 ohm<\/td><td>OL (V\u00f4 h\u1ea1n) ho\u1eb7c ~0 Ohm<\/td><td>Cu\u1ed9n d\u00e2y h\u1ecfng<\/td><\/tr><tr><td>Li\u00ean h\u1ec7 NC (Ph\u1ea7n c\u00f2n l\u1ea1i)<\/td><td>T\u00ednh li\u00ean t\u1ee5c (Ti\u1ebfng b\u00edp)<\/td><td>Kh\u00f4ng c\u00f3 t\u00ednh li\u00ean t\u1ee5c<\/td><td>Li\u00ean h\u1ec7 NC kh\u00f4ng h\u1ee3p l\u1ec7<\/td><\/tr><tr><td>Kh\u00f4ng li\u00ean l\u1ea1c (Ngh\u1ec9 ng\u01a1i)<\/td><td>Kh\u00f4ng c\u00f3 t\u00ednh li\u00ean t\u1ee5c<\/td><td>T\u00ednh li\u00ean t\u1ee5c (Ti\u1ebfng b\u00edp)<\/td><td>C\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac h\u00e0n<\/td><\/tr><tr><td>K\u00edch ho\u1ea1t<\/td><td>Ti\u1ebfng \u201cl\u00e1ch c\u00e1ch\u201d r\u00f5 r\u00e0ng\u201d<\/td><td>Kh\u00f4ng c\u00f3 ti\u1ebfng l\u00e1ch c\u00e1ch \/ ti\u1ebfng vo ve<\/td><td>S\u1ef1 c\u1ed1 c\u01a1 kh\u00ed<\/td><\/tr><tr><td>Kh\u00f4ng li\u00ean l\u1ea1c (\u0110ang ho\u1ea1t \u0111\u1ed9ng)<\/td><td>T\u00ednh li\u00ean t\u1ee5c (Ti\u1ebfng b\u00edp)<\/td><td>Kh\u00f4ng c\u00f3 t\u00ednh li\u00ean t\u1ee5c<\/td><td>C\u00e1ch \"Kh\u00f4ng li\u00ean l\u1ea1c\" sai l\u1ea7m<\/td><\/tr><tr><td>Li\u00ean h\u1ec7 NC (\u0110ang ho\u1ea1t \u0111\u1ed9ng)<\/td><td>Kh\u00f4ng c\u00f3 t\u00ednh li\u00ean t\u1ee5c<\/td><td>T\u00ednh li\u00ean t\u1ee5c (Ti\u1ebfng b\u00edp)<\/td><td>C\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac h\u00e0n<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Khi k\u1ebft qu\u1ea3 ki\u1ec3m tra cho th\u1ea5y r\u01a1-le b\u1ecb h\u1ecfng, b\u1ea1n c\u1ea7n t\u00ecm m\u1ed9t s\u1ea3n ph\u1ea9m thay th\u1ebf ch\u1ea5t l\u01b0\u1ee3ng. M\u1eb7c d\u00f9 c\u00e1c r\u01a1-le b\u00e1n t\u1ea1i c\u00e1c c\u1eeda h\u00e0ng ph\u1ee5 t\u00f9ng \u00f4 t\u00f4 th\u00f4ng th\u01b0\u1eddng v\u1eabn ho\u1ea1t \u0111\u1ed9ng \u0111\u01b0\u1ee3c, nh\u01b0ng trong c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi \u0111\u1ed9 tin c\u1eady cao ho\u1eb7c \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 y\u00ean t\u00e2m ng\u1ee7 ngon v\u00e0o ban \u0111\u00eam, vi\u1ec7c s\u1eed d\u1ee5ng linh ki\u1ec7n \u0111\u1ea1t ti\u00eau chu\u1ea9n c\u00f4ng nghi\u1ec7p l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn kh\u00f4n ngoan.<\/p>\n\n\n\n<p>Ch\u00fang t\u00f4i s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng cao t\u1ea1i <a href=\"https:\/\/www.omch.com\/vi\/\">OMCH<\/a>, c\u00e1c r\u01a1le c\u1ee7a ch\u00fang t\u00f4i \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo c\u00e1c ti\u00eau chu\u1ea9n nghi\u00eam ng\u1eb7t h\u01a1n so v\u1edbi c\u00e1c linh ki\u1ec7n d\u00e0nh cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng. S\u1ea3n ph\u1ea9m c\u1ee7a ch\u00fang t\u00f4i c\u00f3 \u0111\u1ed9 b\u1ec1n cao v\u00e0 lu\u00f4n ho\u1ea1t \u0111\u1ed9ng \u1ed5n \u0111\u1ecbnh, gi\u00fap b\u1ea1n kh\u00f4ng ph\u1ea3i l\u00e0m l\u1ea1i c\u00f4ng vi\u1ec7c n\u00e0y l\u1ea7n th\u1ee9 hai. M\u1ed9t r\u01a1le t\u1ed1t kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t linh ki\u1ec7n.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1: N\u1ebfu r\u01a1-le kh\u00f4ng ph\u1ea3i l\u00e0 nguy\u00ean nh\u00e2n th\u00ec sao?<\/h2>\n\n\n\n<p>\u0110i\u1ec1u h\u00e0i h\u01b0\u1edbc trong v\u1ea5n \u0111\u1ec1 n\u00e0y l\u00e0 r\u01a1le s\u1ebd v\u01b0\u1ee3t qua t\u1ea5t c\u1ea3 c\u00e1c b\u00e0i ki\u1ec3m tra, nh\u01b0ng m\u1ea1ch l\u1ea1i kh\u00f4ng th\u1ec3 t\u00e1i hi\u1ec7n l\u1ed7i; \u0111i\u1ec1u n\u00e0y tuy g\u00e2y b\u1ef1c b\u1ed9i nh\u01b0ng c\u0169ng l\u00e0 \u0111i\u1ec1u c\u00f3 th\u1ec3 d\u1ef1 \u0111o\u00e1n \u0111\u01b0\u1ee3c. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y ch\u00ednh r\u01a1le v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 v\u1ea5n \u0111\u1ec1 th\u1ef1c s\u1ef1 n\u1eb1m \u1edf ch\u1ed7 kh\u00e1c. L\u00fac n\u00e0y, b\u1ea1n n\u00ean chuy\u1ec3n s\u1ef1 ch\u00fa \u00fd sang m\u1ea1ch \u0111i\u1ec7n. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, m\u1ed9t c\u00e1ch ti\u1ebfp c\u1eadn c\u00f3 h\u1ec7 th\u1ed1ng s\u1ebd mang l\u1ea1i gi\u00e1 tr\u1ecb v\u00f4 gi\u00e1.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ki\u1ec3m tra c\u1ea7u ch\u00ec:<\/strong> H\u1ea7u nh\u01b0 lu\u00f4n c\u00f3 m\u1ed9t c\u1ea7u ch\u00ec \u0111\u01b0\u1ee3c l\u1eafp v\u00e0o r\u01a1le. H\u00e3y th\u00e1o c\u1ea7u ch\u00ec t\u01b0\u01a1ng \u1ee9ng ra v\u00e0 d\u00f9ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u0111\u1ec3 ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c. \u0110\u1eebng ch\u1ec9 d\u1ef1a v\u00e0o quan s\u00e1t b\u1eb1ng m\u1eaft th\u01b0\u1eddng v\u00ec nh\u1eefng v\u1ebft n\u1ee9t nh\u1ecf nh\u01b0 s\u1ee3i t\u00f3c c\u00f3 th\u1ec3 kh\u00f4ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra \u1ed5 c\u1eafm r\u01a1-le:<\/strong> \u0110\u00f3 c\u00f3 th\u1ec3 l\u00e0 ngu\u1ed3n \u0111i\u1ec7n v\u00e0 t\u00edn hi\u1ec7u c\u1ea5p cho r\u01a1-le. H\u00e3y ki\u1ec3m tra c\u00e1c \u1ed5 c\u1eafm ch\u00e2n trong h\u1ed9p c\u1ea7u ch\u00ec b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng (ch\u1ebf \u0111\u1ed9 DC Volts, khi ch\u00eca kh\u00f3a \u0111\u00e3 \u0111\u01b0\u1ee3c b\u1eadt). \u1ed4 c\u1eafm c\u1ee7a ch\u00e2n 30 (ngu\u1ed3n ch\u00ednh) v\u00e0 ch\u00e2n 86 (ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n) ph\u1ea3i hi\u1ec3n th\u1ecb 12V. T\u1ea1i \u1ed5 c\u1eafm n\u00e0y, b\u1ea1n c\u1ea7n ki\u1ec3m tra xem c\u00f3 \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t t\u1ed1t (g\u1ea7n 0V) khi \u0111o so v\u1edbi ch\u00e2n 85 hay kh\u00f4ng. N\u1ebfu thi\u1ebfu b\u1ea5t k\u1ef3 gi\u00e1 tr\u1ecb n\u00e0o trong s\u1ed1 n\u00e0y, th\u00ec h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n c\u1ee7a b\u1ea1n c\u00f3 v\u1ea5n \u0111\u1ec1.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra c\u00f4ng t\u1eafc \u0111i\u1ec1u khi\u1ec3n:<\/strong> T\u00edn hi\u1ec7u t\u1ea1i ch\u00e2n 86 \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi m\u1ed9t c\u00f4ng t\u1eafc (v\u00ed d\u1ee5: n\u00fat b\u1ea5m tr\u00ean v\u00f4-l\u0103ng, c\u00f4ng t\u1eafc g\u1ea1t tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, c\u1ea3m bi\u1ebfn). B\u1ea1n c\u1ea7n ki\u1ec3m tra xem c\u00f4ng t\u1eafc \u0111\u00f3 c\u00f3 ho\u1ea1t \u0111\u1ed9ng hay kh\u00f4ng b\u1eb1ng c\u00e1ch \u0111o t\u00ednh li\u00ean t\u1ee5c khi c\u00f4ng t\u1eafc \u1edf tr\u1ea1ng th\u00e1i \u0111\u00f3ng.<\/li>\n\n\n\n<li><strong>Ki\u1ec3m tra h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n:<\/strong> Ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 c\u00e1c k\u1ebft n\u1ed1i \u0111i v\u00e0o v\u00e0 \u0111i ra kh\u1ecfi \u1ed5 c\u1eafm r\u01a1-le. Ki\u1ec3m tra c\u00e1c d\u00e2y v\u00e0 c\u00e1p \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c h\u01b0 h\u1ecfng r\u00f5 r\u00e0ng, ch\u1eb3ng h\u1ea1n nh\u01b0 l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb m\u00e0i m\u00f2n, hi\u1ec7n t\u01b0\u1ee3ng \u0103n m\u00f2n m\u00e0u xanh l\u00e1 c\u00e2y \u1edf c\u00e1c \u0111\u1ea7u n\u1ed1i ho\u1eb7c c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ea5t b\u1ecb l\u1ecfng. M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n g\u00e2y s\u1ef1 c\u1ed1 l\u00e0 k\u1ebft n\u1ed1i \u0111\u1ea5t k\u00e9m, \u0111\u00e2y c\u00f3 l\u1ebd l\u00e0 s\u1ef1 c\u1ed1 kh\u00f3 ph\u00e1t hi\u1ec7n nh\u1ea5t v\u00e0 l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 \u0111i\u1ec7n r\u1ea5t ph\u1ed5 bi\u1ebfn.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 ki\u1ec3m th\u1eed r\u01a1le v\u00e0 nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd<\/h2>\n\n\n\n<p><strong>C\u00e2u h\u1ecfi: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t r\u01a1-le?<\/strong><\/p>\n\n\n\n<p>A: Ph\u01b0\u01a1ng ph\u00e1p nhanh nh\u1ea5t l\u00e0 s\u1eed d\u1ee5ng m\u1ed9t r\u01a1le \u0111\u00e3 bi\u1ebft l\u00e0 ho\u1ea1t \u0111\u1ed9ng t\u1ed1t, hay c\u00f2n g\u1ecdi l\u00e0 \u201cth\u1eed nghi\u1ec7m ho\u00e1n \u0111\u1ed5i\u201d. Th\u1eed nghi\u1ec7m tr\u00ean b\u00e0n l\u00e0m vi\u1ec7c b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng l\u00e0 c\u00e1ch ch\u00ednh x\u00e1c nh\u1ea5t: \u0111o \u0111i\u1ec7n tr\u1edf b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng (c\u1ea7n ch\u1ecdn tr\u01b0\u1edbc d\u1ea3i \u0111o ph\u00f9 h\u1ee3p v\u1edbi d\u1ea3i \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y t\u1eeb 50\u2013120). N\u1ed1i c\u00e1c d\u00e2y v\u00e0o c\u00e1c ch\u00e2n \u0111\u00fang (ki\u1ec3m tra c\u00e1c k\u1ebft n\u1ed1i tr\u00ean c\u00e1c ch\u00e2n \u0111\u00fang b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng \u1edf ch\u1ebf \u0111\u1ed9 ki\u1ec3m tra li\u00ean t\u1ee5c; \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng s\u1ebd ph\u00e1t ra ti\u1ebfng b\u00edp) r\u1ed3i c\u1ea5p \u0111i\u1ec7n \u00e1p v\u00e0o cu\u1ed9n d\u00e2y \u0111\u1ec3 xem li\u1ec7u n\u00f3 c\u00f3 ph\u00e1t ra ti\u1ebfng \u201cclick\u201d v\u00e0 m\u1edf ho\u1eb7c \u0111\u00f3ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m, t\u1eeb \u0111\u00f3 thay \u0111\u1ed5i tr\u1ea1ng th\u00e1i li\u00ean t\u1ee5c gi\u1eefa c\u00e1c ti\u1ebfp \u0111i\u1ec3m hay kh\u00f4ng.<\/p>\n\n\n\n<p><strong>C\u00e2u h\u1ecfi: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra m\u1ed9t r\u01a1-le 4 ch\u00e2n b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng?<\/strong><\/p>\n\n\n\n<p>A: R\u01a1-le 4 ch\u00e2n c\u00f3 c\u00e1c ch\u00e2n 85, 86, 30 v\u00e0 87. Tr\u01b0\u1edbc ti\u00ean, h\u00e3y ki\u1ec3m tra cu\u1ed9n d\u00e2y b\u1eb1ng c\u00e1ch \u0111o \u0111i\u1ec7n tr\u1edf gi\u1eefa ch\u00e2n 85 v\u00e0 86. Th\u1ee9 hai, \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 s\u1ef1 li\u00ean t\u1ee5c gi\u1eefa c\u00e1c ch\u00e2n 30 v\u00e0 87. Th\u1ee9 ba, c\u1ea5p ngu\u1ed3n 12V v\u00e0o c\u00e1c ch\u00e2n 85 v\u00e0 86; r\u01a1-le s\u1ebd ph\u00e1t ra ti\u1ebfng \"click\", v\u00e0 l\u00fac n\u00e0y b\u1ea1n s\u1ebd c\u00f3 s\u1ef1 li\u00ean t\u1ee5c gi\u1eefa c\u00e1c ch\u00e2n 30 v\u00e0 87.<\/p>\n\n\n\n<p><strong>C\u00e2u h\u1ecfi: M\u1ed9t r\u01a1le 12V th\u01b0\u1eddng c\u00f3 \u0111i\u1ec7n tr\u1edf l\u00e0 bao nhi\u00eau?<\/strong><\/p>\n\n\n\n<p>A: M\u1ed9t r\u01a1-le \u00f4 t\u00f4 th\u00f4ng th\u01b0\u1eddng 12 volt s\u1ebd c\u00f3 \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y t\u1eeb 50 \u0111\u1ebfn 120 Ohm. Gi\u00e1 tr\u1ecb \u0111o \u0111\u01b0\u1ee3c r\u1ea5t th\u1ea5p ho\u1eb7c v\u00f4 h\u1ea1n (OL) l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y cu\u1ed9n d\u00e2y b\u1ecb h\u1ecfng.<\/p>\n\n\n\n<p><strong>C\u00e2u h\u1ecfi: C\u00e1ch kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 \u0111\u1ed1i v\u1edbi r\u01a1le kh\u1edfi \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/strong><\/p>\n\n\n\n<p>A: R\u01a1le kh\u1edfi \u0111\u1ed9ng, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 solenoid, th\u1ef1c ch\u1ea5t ch\u1ec9 l\u00e0 m\u1ed9t lo\u1ea1i r\u01a1le c\u00f3 c\u00f4ng su\u1ea5t r\u1ea5t cao. Nguy\u00ean l\u00fd ki\u1ec3m tra l\u00e0 gi\u1ed1ng nhau. C\u00f3 th\u1ec3 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf trong m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n nh\u1ecf (c\u00f3 th\u1ec3 l\u00e0 hai c\u1ef1c nh\u1ecf). Sau \u0111\u00f3, c\u00f3 th\u1ec3 ki\u1ec3m tra c\u00e1c c\u1ef1c d\u00f2ng \u0111i\u1ec7n cao (hai ch\u1ed1t l\u1edbn) \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem c\u00f3 b\u1ecb \u0111\u1ee9t m\u1ea1ch hay kh\u00f4ng. \u0110\u1ea3m b\u1ea3o r\u1eb1ng khi c\u1ea5p ngu\u1ed3n 12V v\u00e0o c\u00e1c c\u1ef1c \u0111i\u1ec1u khi\u1ec3n, solenoid s\u1ebd ph\u00e1t ra ti\u1ebfng k\u00eau r\u1ea5t l\u1edbn, v\u00e0 sau \u0111\u00f3 b\u1ea1n s\u1ebd th\u1ea5y r\u1eb1ng hai ch\u1ed1t l\u1edbn n\u00e0y gi\u1edd \u0111\u00e3 d\u1eabn \u0111i\u1ec7n. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u00ean xe.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Nh\u1eefng \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Lu\u00f4n \u0111\u1eb7t an to\u00e0n l\u00ean h\u00e0ng \u0111\u1ea7u b\u1eb1ng c\u00e1ch ng\u1eaft k\u1ebft n\u1ed1i \u1eafc-quy tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh c\u00e1c c\u00f4ng vi\u1ec7c li\u00ean quan \u0111\u1ebfn m\u1ea1ch \u0111i\u1ec7n.<\/li>\n\n\n\n<li>\u201cTh\u1eed nghi\u1ec7m ho\u00e1n \u0111\u1ed5i\u201d l\u00e0 ph\u01b0\u01a1ng ph\u00e1p nhanh nh\u1ea5t \u0111\u1ec3 ch\u1ea9n \u0111o\u00e1n r\u01a1le b\u1ecb h\u1ecfng.<\/li>\n\n\n\n<li>M\u00e1y \u0111o \u0111a n\u0103ng l\u00e0 c\u00f4ng c\u1ee5 kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ch\u00ednh x\u00e1c t\u00ecnh tr\u1ea1ng c\u1ee7a r\u01a1-le th\u00f4ng qua vi\u1ec7c ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf cu\u1ed9n d\u00e2y v\u00e0 \u0111\u1ed9 d\u1eabn \u0111i\u1ec7n c\u1ee7a c\u00e1c ti\u1ebfp \u0111i\u1ec3m.<\/li>\n\n\n\n<li>M\u1ed9t b\u00e0i ki\u1ec3m tra to\u00e0n di\u1ec7n bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra r\u01a1le c\u1ea3 \u1edf tr\u1ea1ng th\u00e1i ngh\u1ec9 (ki\u1ec3m tra t\u0129nh) v\u00e0 khi \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n (ki\u1ec3m tra \u0111\u1ed9ng).<\/li>\n\n\n\n<li>N\u1ebfu r\u01a1le ki\u1ec3m tra th\u1ea5y v\u1eabn ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, th\u00ec s\u1ef1 c\u1ed1 n\u1eb1m \u1edf m\u1ed9t v\u1ecb tr\u00ed kh\u00e1c trong m\u1ea1ch, do \u0111\u00f3 b\u1ea1n c\u1ea7n ki\u1ec3m tra c\u1ea7u ch\u00ec, h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n, c\u0169ng nh\u01b0 ngu\u1ed3n \u0111i\u1ec7n v\u00e0 d\u00e2y n\u1ed1i \u0111\u1ea5t t\u1ea1i \u1ed5 c\u1eafm r\u01a1le.<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>M\u1ed9t trong nh\u1eefng b\u1ed9 ph\u1eadn quan tr\u1ecdng nh\u1ea5t, nh\u01b0ng \u0111\u1ed3ng th\u1eddi c\u0169ng t\u01b0\u01a1ng \u0111\u1ed1i \u00edt \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u1ee9c t\u1ea1p c\u1ee7a c\u1ea3 \u00f4 t\u00f4 hi\u1ec7n \u0111\u1ea1i l\u1eabn c\u00e1c m\u00e1y m\u00f3c c\u1ee1 l\u1edbn, ch\u00ednh l\u00e0 r\u01a1-le m\u1edbi. Lo\u1ea1i r\u01a1-le n\u00e0y c\u00f2n xu\u1ea5t hi\u1ec7n trong r\u1ea5t nhi\u1ec1u h\u1ec7 th\u1ed1ng kh\u00e1c nhau, ch\u1eb3ng h\u1ea1n nh\u01b0 trong h\u1ec7 th\u1ed1ng nhi\u00ean li\u1ec7u d\u01b0\u1edbi d\u1ea1ng b\u01a1m tr\u00ean \u00f4 t\u00f4 v\u00e0 d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n trong [\u2026]<\/p>","protected":false},"author":4,"featured_media":5945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":"none","_seopress_titles_title":"How to Test a Relay: A Pro's Ultimate Guide","_seopress_titles_desc":"Learn how to test a relay like a pro with our ultimate guide! Discover methods for how to check a relay and how to test relays efficiently.","_seopress_robots_index":"","footnotes":""},"categories":[46],"tags":[],"class_list":["post-5925","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industrial-control"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5925","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=5925"}],"version-history":[{"count":3,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5925\/revisions"}],"predecessor-version":[{"id":5991,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/posts\/5925\/revisions\/5991"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media\/5945"}],"wp:attachment":[{"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/media?parent=5925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/categories?post=5925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.omch.com\/vi\/wp-json\/wp\/v2\/tags?post=5925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}