{"id":2626,"date":"2026-05-22T01:23:03","date_gmt":"2026-05-22T01:23:03","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=2626"},"modified":"2026-05-22T01:23:05","modified_gmt":"2026-05-22T01:23:05","slug":"normally-open-vs-normally-closed-contactor","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/normally-open-vs-normally-closed-contactor\/","title":{"rendered":"Contactor th\u01b0\u1eddng m\u1edf so v\u1edbi th\u01b0\u1eddng \u0111\u00f3ng"},"content":{"rendered":"<p>S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa m\u1ed9t <strong>contactor m\u1edf b\u00ecnh th\u01b0\u1eddng<\/strong> v\u00e0 m\u1ed9t <strong>contactor \u0111\u00f3ng b\u00ecnh th\u01b0\u1eddng<\/strong> l\u00e0 tr\u1ea1ng th\u00e1i c\u1ee7a ch\u00fang khi kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n. M\u1ed9t contactor m\u1edf b\u00ecnh th\u01b0\u1eddng (NO) s\u1ebd c\u00f3 m\u1ea1ch m\u1edf v\u00e0 \u0111\u00f3ng khi \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, trong khi m\u1ed9t contactor \u0111\u00f3ng b\u00ecnh th\u01b0\u1eddng (NC) s\u1ebd c\u00f3 m\u1ea1ch \u0111\u00f3ng v\u00e0 m\u1edf khi \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n. Do \u0111\u00f3, NO ch\u1ee7 y\u1ebfu ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t c\u00e1ch \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n (bao g\u1ed3m c\u1ea3 \u0111\u1ed9ng c\u01a1) v\u00e0 cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng an to\u00e0n th\u00f4ng qua ti\u1ebfp x\u00fac v\u1eadt l\u00fd, trong khi NC l\u00e0m ng\u01b0\u1ee3c l\u1ea1i. T\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt n\u00e0y cung c\u1ea5p th\u00f4ng tin v\u1ec1 vi\u1ec7c ch\u1ecdn contactor ph\u00f9 h\u1ee3p d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt y\u00eau c\u1ea7u.<\/p>\n<h2>\u0110\u1ecbnh ngh\u0129a c\u01a1 b\u1ea3n v\u1ec1 contactor NO v\u00e0 NC<\/h2>\n<p>Contactors l\u00e0 c\u00e1c thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n t\u1eeb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n c\u00e1c t\u1ea3i m\u1ea1ch \u0111i\u1ec7n c\u00f4ng su\u1ea5t r\u1ea5t cao b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c t\u00edn hi\u1ec7u c\u00f4ng su\u1ea5t r\u1ea5t th\u1ea5p. Thu\u1eadt ng\u1eef \u201cb\u00ecnh th\u01b0\u1eddng\u201d \u0111\u1ec1 c\u1eadp \u0111\u1ebfn tr\u1ea1ng th\u00e1i c\u1ee7a thi\u1ebft b\u1ecb khi kh\u00f4ng c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho cu\u1ed9n d\u00e2y.<\/p>\n<ol>\n<li><strong>Contactor M\u1edf B\u00ecnh Th\u01b0\u1eddng (NO)<\/strong>: Contactor m\u1edf b\u00ecnh th\u01b0\u1eddng c\u00f3 c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1ea1ch ch\u00ednh m\u1edf \u1edf m\u1ecdi th\u1eddi \u0111i\u1ec3m cho \u0111\u1ebfn khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, l\u00fac \u0111\u00f3 t\u1eeb tr\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ea1o ra khi\u1ebfn c\u00e1c ti\u1ebfp \u0111i\u1ec3m \u0111\u00f3ng l\u1ea1i, cho ph\u00e9p d\u00f2ng \u0111i\u1ec7n \u0111i qua contactor. C\u00e1c contactor m\u1edf b\u00ecnh th\u01b0\u1eddng l\u00e0 lo\u1ea1i contactor ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1, chi\u1ebfu s\u00e1ng v\u00e0 s\u01b0\u1edfi \u1ea5m.<\/li>\n<li><strong>Contactor \u0110\u00f3ng B\u00ecnh Th\u01b0\u1eddng (NC)<\/strong>: Contactor \u0111\u00f3ng b\u00ecnh th\u01b0\u1eddng c\u00f3 c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1ea1ch ch\u00ednh \u0111\u00f3ng \u1edf m\u1ecdi th\u1eddi \u0111i\u1ec3m cho \u0111\u1ebfn khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n, l\u00fac \u0111\u00f3 t\u1eeb tr\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u1ea1o ra khi\u1ebfn c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf ra, ng\u0103n d\u00f2ng \u0111i\u1ec7n \u0111i qua contactor.<\/li>\n<\/ol>\n<p>C\u00e1c th\u00e0nh ph\u1ea7n n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ch \u0111\u1ec3 cung c\u1ea5p h\u1ec7 th\u1ed1ng an to\u00e0n v\u00e0 c\u00e1c m\u1ea1ch ng\u1eaft kh\u1ea9n c\u1ea5p ho\u1eb7c c\u00e1c m\u1ea1ch kh\u00f4ng b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a cho \u0111\u1ebfn khi ch\u00fang \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. C\u00f3 r\u1ea5t nhi\u1ec1u t\u00f9y ch\u1ecdn c\u00f3 s\u1eb5n, v\u00ec v\u1eady vi\u1ec7c so s\u00e1nh c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a contactor NO v\u00e0 NC l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ch\u1ecdn l\u1ef1a t\u00f9y ch\u1ecdn t\u1ed1t nh\u1ea5t.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2628\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/05\/Key-Differences-Between-NO-and-NC-Contactors.webp\" alt=\"S\u1ef1 Kh\u00e1c Bi\u1ec7t Ch\u00ednh Gi\u1eefa Contactors NO v\u00e0 NC\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>S\u1ef1 Kh\u00e1c Bi\u1ec7t Ch\u00ednh Gi\u1eefa Contactors NO v\u00e0 NC<\/h2>\n<table>\n<thead>\n<tr>\n<th>T\u00ecnh tr\u1ea1ng<\/th>\n<th>Contactors M\u1edf B\u00ecnh Th\u01b0\u1eddng (NO)<\/th>\n<th>Contactors \u0110\u00f3ng B\u00ecnh Th\u01b0\u1eddng (NC)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u00ecnh tr\u1ea1ng M\u1eb7c \u0110\u1ecbnh<\/td>\n<td>M\u1ea1ch m\u1edf (kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n)<\/td>\n<td>M\u1ea1ch \u0111\u00f3ng (d\u00f2ng \u0111i\u1ec7n ch\u1ea3y)<\/td>\n<\/tr>\n<tr>\n<td>K\u00edch ho\u1ea1t<\/td>\n<td>Cu\u1ed9n d\u00e2y \u0111\u1ea9y \u0111\u1ec3 \u0111\u00f3ng m\u1ea1ch<\/td>\n<td>Cu\u1ed9n d\u00e2y \u0111\u1ea9y \u0111\u1ec3 m\u1edf m\u1ea1ch<\/td>\n<\/tr>\n<tr>\n<td>S\u1eed d\u1ee5ng<\/td>\n<td>M\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p, \u0111\u01a1n v\u1ecb HVAC, logic Boolean v\u00e0 h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng<\/td>\n<td>Kh\u00f3a an to\u00e0n, m\u1ea1ch d\u1eebng kh\u1ea9n c\u1ea5p v\u00e0 ngu\u1ed3n d\u1ef1 ph\u00f2ng<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n \u00c1p \u0110\u1ecbnh M\u1ee9c<\/td>\n<td>240V, 120V, 24VDC<\/td>\n<td>240V, 120V, 24VDC<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea5u H\u00ecnh<\/td>\n<td>2 c\u1ef1c, 3 c\u1ef1c, 4 c\u1ef1c<\/td>\n<td>2 c\u1ef1c, 3 c\u1ef1c (4 c\u1ef1c \u00edt ph\u1ed5 bi\u1ebfn h\u01a1n)<\/td>\n<\/tr>\n<tr>\n<td>Chi Ph\u00ed<\/td>\n<td>$20\u2013$150<\/td>\n<td>$25\u2013$200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1c Nh\u00e0 S\u1ea3n Xu\u1ea5t H\u00e0ng \u0110\u1ea7u c\u1ee7a Contactors M\u1edf v\u00e0 \u0110\u00f3ng B\u00ecnh Th\u01b0\u1eddng<\/h2>\n<p>C\u00e1c th\u01b0\u01a1ng hi\u1ec7u sau \u0111\u00e2y l\u00e0 nh\u1eefng th\u01b0\u01a1ng hi\u1ec7u \u0111\u01b0\u1ee3c tin c\u1eady nh\u1ea5t tr\u00ean to\u00e0n c\u1ea7u trong vi\u1ec7c cung c\u1ea5p contactors:<\/p>\n<ul>\n<li><a href=\"https:\/\/www.schneider-electric.com\" target=\"_blank\" rel=\"nofollow noopener\">Schneider Electric<\/a>: Nh\u00e0 s\u1ea3n xu\u1ea5t contactor NO\/NC 3 c\u1ef1c v\u00e0 4 c\u1ef1c. <span style=\"color: #ff0000;\">Ph\u1ea1m Vi Gi\u00e1<\/span>: $30\u2013$200.<\/li>\n<li><a href=\"https:\/\/www.abb.com\" target=\"_blank\" rel=\"nofollow noopener\">ABB<\/a>: Nh\u00e0 s\u1ea3n xu\u1ea5t contactor NC nh\u1ecf g\u1ecdn v\u00e0 contactor NO c\u00f4ng su\u1ea5t cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng an to\u00e0n v\u00e0 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1. <span style=\"color: #ff0000;\">Ph\u1ea1m Vi Gi\u00e1<\/span>: $25\u2013$180.<\/li>\n<li><a href=\"https:\/\/www.eaton.com\" target=\"_blank\" rel=\"nofollow noopener\">Eaton<\/a>: Nh\u00e0 s\u1ea3n xu\u1ea5t contactor NO v\u00e0 NC 2 c\u1ef1c v\u00e0 3 c\u1ef1c ti\u1ebft ki\u1ec7m. <span style=\"color: #ff0000;\">Ph\u1ea1m Vi Gi\u00e1<\/span>: $20\u2013$120.<\/li>\n<li><a href=\"https:\/\/www.squared.com\" target=\"_blank\" rel=\"nofollow noopener\">Square D<\/a>: Nh\u00e0 s\u1ea3n xu\u1ea5t contactor thi\u1ebft b\u1ecb HVAC v\u1edbi t\u00f9y ch\u1ecdn NO v\u00e0 NC. <span style=\"color: #ff0000;\">Ph\u1ea1m Vi Gi\u00e1<\/span>: $25\u2013$150.<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2629\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/05\/Ways-to-Tell-the-Difference-Between-NO-and-NC-Contacts.webp\" alt=\"C\u00e1ch Ph\u00e2n Bi\u1ec7t Gi\u1eefa C\u00e1c Ti\u1ebfp \u0110i\u1ec3m NO v\u00e0 NC\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>C\u00e1ch Ph\u00e2n Bi\u1ec7t Gi\u1eefa C\u00e1c Ti\u1ebfp \u0110i\u1ec3m NO v\u00e0 NC<\/h2>\n<p>Vi\u1ec7c l\u1eafp \u0111\u1eb7t kh\u00f4ng \u0111\u00fang NC v\u00e0 NO c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng h\u1ec7 th\u1ed1ng c\u1ee7a b\u1ea1n ho\u1eb7c t\u1ea1o ra nguy c\u01a1 an to\u00e0n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ph\u00e2n bi\u1ec7t ch\u00fang:<\/p>\n<p><span style=\"color: #ff0000;\">Ki\u1ec3m tra Bi\u1ec3u T\u01b0\u1ee3ng<\/span>: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa NC v\u00e0 NO l\u00e0 bi\u1ec3u t\u01b0\u1ee3ng tr\u00ean s\u01a1 \u0111\u1ed3 contactor. Normally open s\u1ebd c\u00f3 \u201cNO\u201d ho\u1eb7c bi\u1ec3u t\u01b0\u1ee3ng c\u00f4ng t\u1eafc m\u1edf (\u25cb\/\u25cb), trong khi normally closed s\u1ebd c\u00f3 \u201cNC\u201d ho\u1eb7c bi\u1ec3u t\u01b0\u1ee3ng c\u00f4ng t\u1eafc \u0111\u00f3ng (\u25cf\/\u25cf).<\/p>\n<p><span style=\"color: #ff0000;\">Ki\u1ec3m Tra B\u1eb1ng M\u1eaft<\/span>: Khi kh\u00f4ng c\u00f3 \u0111i\u1ec7n, s\u1ebd c\u00f3 m\u1ed9t kho\u1ea3ng tr\u1ed1ng gi\u1eefa c\u00e1c t\u1ea5m kim lo\u1ea1i c\u1ee7a m\u1ed9t contactor NO. Ng\u01b0\u1ee3c l\u1ea1i, c\u00e1c t\u1ea5m c\u1ee7a m\u1ed9t contactor NC s\u1ebd ch\u1ea1m v\u00e0o nhau.<\/p>\n<p><span style=\"color: #ff0000;\">Ki\u1ec3m Tra B\u1eb1ng \u0110\u1ed3ng H\u1ed3 \u0110o<\/span>: V\u1edbi \u0111\u1ed3ng h\u1ed3 \u0111o \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf ch\u1ebf \u0111\u1ed9 li\u00ean t\u1ee5c, \u0111\u1eb7t c\u00e1c \u0111\u1ea7u d\u00f2 l\u00ean c\u00e1c \u0111\u1ea7u ti\u1ebfp x\u00fac c\u1ee7a contactor. M\u1ed9t contactor NO s\u1ebd kh\u00f4ng c\u00f3 li\u00ean t\u1ee5c cho \u0111\u1ebfn khi n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec7n. M\u1ed9t contactor NC s\u1ebd c\u00f3 li\u00ean t\u1ee5c cho \u0111\u1ebfn khi n\u00f3 nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec7n.<\/p>\n<p><span style=\"color: #ff0000;\">Ghi nh\u00e3n<\/span>: H\u1ea7u h\u1ebft c\u00e1c contactor \u0111\u1ec1u c\u00f3 k\u00fd hi\u1ec7u \u201cNO\u201d ho\u1eb7c \u201cNC\u201d \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c nh\u1eadn d\u1ea1ng.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 contactor NO\/NC<\/h2>\n<h3>\u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu t\u00f4i s\u1eed d\u1ee5ng ti\u1ebfp \u0111i\u1ec3m NC thay v\u00ec ti\u1ebfp \u0111i\u1ec3m NO?<\/h3>\n<p>N\u1ebfu b\u1ea1n c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng m\u1ed9t <strong>contactor NC<\/strong> thay v\u00ec m\u1ed9t <strong>contactor NO<\/strong>, b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea3o ng\u01b0\u1ee3c ho\u1ea1t \u0111\u1ed9ng ban \u0111\u1ea7u c\u1ee7a m\u1ea1ch. V\u00ed d\u1ee5, n\u1ebfu b\u1ea1n l\u1eafp m\u1ed9t contactor NC tr\u00ean \u0111\u1ed9ng c\u01a1, \u0111\u1ed9ng c\u01a1 s\u1ebd ch\u1ea1y li\u00ean t\u1ee5c cho \u0111\u1ebfn khi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t \u0111\u1ec3 d\u1eebng n\u00f3. \u0110\u00e2y s\u1ebd l\u00e0 \u0111i\u1ec1u ki\u1ec7n ng\u01b0\u1ee3c l\u1ea1i v\u1edbi m\u1ee5c ti\u00eau b\u1ea1n mu\u1ed1n \u0111\u1ea1t \u0111\u01b0\u1ee3c, \u0111\u00f3 l\u00e0 \u201ckh\u1edfi \u0111\u1ed9ng theo y\u00eau c\u1ea7u.\u201d Vi\u1ec7c s\u1eed d\u1ee5ng kh\u00f4ng \u0111\u00fang c\u00f3 th\u1ec3 g\u00e2y h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb, ho\u1ea1t \u0111\u1ed9ng th\u1ea5t b\u1ea1i ho\u1eb7c nguy hi\u1ec3m v\u1ec1 an to\u00e0n. Lu\u00f4n x\u00e1c minh lo\u1ea1i contactor tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft contactor \u0111ang m\u1edf hay \u0111\u00f3ng?<\/h3>\n<p>Tr\u01b0\u1edbc ti\u00ean, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng ngu\u1ed3n \u0111i\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1eaft cho contactor tr\u01b0\u1edbc khi ki\u1ec3m tra tr\u1ea1ng th\u00e1i c\u1ee7a c\u00e1c ti\u1ebfp \u0111i\u1ec3m. Quan s\u00e1t c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac ch\u00ednh c\u1ee7a contactor \u0111\u1ec3 x\u00e1c minh b\u1eb1ng m\u1eaft: n\u1ebfu c\u00e1c t\u1ea5m kim lo\u1ea1i kh\u00f4ng ch\u1ea1m v\u00e0o nhau, contactor \u0111ang m\u1edf (m\u1ea1ch t\u1eaft). N\u1ebfu c\u00e1c t\u1ea5m ch\u1ea1m v\u00e0o nhau, contactor \u0111ang \u0111\u00f3ng (m\u1ea1ch b\u1eadt). N\u1ebfu b\u1ea1n mu\u1ed1n ki\u1ec3m tra tr\u1ea1ng th\u00e1i khi c\u00f3 ngu\u1ed3n b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1, b\u1ea1n c\u00f3 th\u1ec3 ki\u1ec3m tra s\u1ef1 li\u00ean t\u1ee5c gi\u1eefa c\u00e1c c\u1ef1c ch\u00ednh \u2014 c\u00f3 li\u00ean t\u1ee5c ngh\u0129a l\u00e0 contactor \u0111\u00f3ng, kh\u00f4ng li\u00ean t\u1ee5c ngh\u0129a l\u00e0 contactor m\u1edf.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft contactor l\u00e0 NO hay NC?<\/h3>\n<p>\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh contactor l\u00e0 Normally Open (NO) hay Normally Closed (NC), h\u00e3y ki\u1ec3m tra b\u1ea3ng t\u00ean contactor v\u00e0\/ho\u1eb7c s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y \u0111\u1ec3 t\u00ecm k\u00fd hi\u1ec7u \u201cNO\u201d ho\u1eb7c \u201cNC\u201d. N\u1ebfu kh\u00f4ng c\u00f3, h\u00e3y ki\u1ec3m tra b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1 \u1edf ch\u1ebf \u0111\u1ed9 \u0111o li\u00ean t\u1ee5c. Khi kh\u00f4ng c\u00f3 ngu\u1ed3n, ti\u1ebfp \u0111i\u1ec3m NO s\u1ebd kh\u00f4ng c\u00f3 li\u00ean t\u1ee5c, trong khi ti\u1ebfp \u0111i\u1ec3m NC s\u1ebd c\u00f3 li\u00ean t\u1ee5c. B\u1ea1n c\u0169ng c\u00f3 th\u1ec3 quan s\u00e1t tr\u1ea1ng th\u00e1i m\u1eb7c \u0111\u1ecbnh \u2014 ti\u1ebfp \u0111i\u1ec3m NO m\u1edf khi kh\u00f4ng c\u00f3 ngu\u1ed3n, v\u00e0 ti\u1ebfp \u0111i\u1ec3m NC \u0111\u00f3ng.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh ti\u1ebfp \u0111i\u1ec3m c\u1ee7a contactor l\u00e0 Normally Open hay Normally Closed?<\/h3>\n<p>N\u1ebfu c\u00e1c ti\u1ebfp \u0111i\u1ec3m ri\u00eang l\u1ebb kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh tr\u00ean s\u01a1 \u0111\u1ed3 \u0111\u1ea5u d\u00e2y c\u1ee7a contactor, b\u1ea1n c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft ch\u00fang qua c\u00e1c k\u00fd hi\u1ec7u tr\u00ean t\u1eebng c\u1ef1c ho\u1eb7c, n\u1ebfu kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u, b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng. Khi contactor kh\u00f4ng c\u00f3 ngu\u1ed3n, ti\u1ebfp \u0111i\u1ec3m NO s\u1ebd kh\u00f4ng c\u00f3 li\u00ean t\u1ee5c v\u00e0 ti\u1ebfp \u0111i\u1ec3m NC s\u1ebd c\u00f3 li\u00ean t\u1ee5c. Khi contactor c\u00f3 ngu\u1ed3n, ti\u1ebfp \u0111i\u1ec3m NO s\u1ebd \u0111\u00f3ng v\u00e0 c\u00f3 li\u00ean t\u1ee5c, trong khi ti\u1ebfp \u0111i\u1ec3m NC s\u1ebd m\u1edf v\u00e0 kh\u00f4ng c\u00f3 li\u00ean t\u1ee5c.<\/p>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn gi\u1eefa contactor normally open v\u00e0 contactor normally closed ph\u1ee5 thu\u1ed9c v\u00e0o tr\u1ea1ng th\u00e1i m\u1eb7c \u0111\u1ecbnh c\u1ee7a m\u1ea1ch v\u00e0 ch\u1ee9c n\u0103ng d\u1ef1 ki\u1ebfn. Contactor normally open \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1, chi\u1ebfu s\u00e1ng v\u00e0 h\u1ec7 th\u1ed1ng HVAC, \u0111\u00f3ng m\u1ea1ch khi c\u00f3 ngu\u1ed3n \u0111\u1ec3 k\u00edch ho\u1ea1t thi\u1ebft b\u1ecb. Ng\u01b0\u1ee3c l\u1ea1i, contactor normally closed gi\u1eef m\u1ea1ch ho\u1ea1t \u0111\u1ed9ng theo m\u1eb7c \u0111\u1ecbnh v\u00e0 ch\u1ec9 m\u1edf khi c\u00f3 ngu\u1ed3n, l\u00e0m cho ch\u00fang thi\u1ebft y\u1ebfu cho c\u00e1c h\u1ec7 th\u1ed1ng an to\u00e0n, ng\u1eaft kh\u1ea9n c\u1ea5p v\u00e0 thi\u1ebft l\u1eadp ngu\u1ed3n d\u1ef1 ph\u00f2ng.<\/p>\n<p>C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e1ng tin c\u1eady nh\u01b0 <a href=\"https:\/\/www.schneider-electric.com\" target=\"_blank\" rel=\"nofollow noopener\">Schneider Electric<\/a>, <a href=\"https:\/\/www.abb.com\" target=\"_blank\" rel=\"nofollow noopener\">ABB<\/a>, v\u00e0 <a href=\"https:\/\/www.eaton.com\" target=\"_blank\" rel=\"nofollow noopener\">Eaton<\/a> cung c\u1ea5p nhi\u1ec1u l\u1ef1a ch\u1ecdn v\u1ec1 \u0111i\u1ec7n \u00e1p v\u00e0 c\u1ea5u h\u00ecnh c\u1ef1c. \u0110\u1ec3 tr\u00e1nh sai s\u00f3t, lu\u00f4n x\u00e1c minh lo\u1ea1i contactor b\u1eb1ng c\u00e1ch ki\u1ec3m tra tr\u1ef1c quan, th\u1eed nghi\u1ec7m b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng ho\u1eb7c s\u01a1 \u0111\u1ed3 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. Hi\u1ec3u r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang \u0111\u1ea3m b\u1ea3o v\u1eadn h\u00e0nh h\u1ec7 th\u1ed1ng \u0111i\u1ec7n t\u1ed1i \u01b0u v\u00e0 an to\u00e0n.<\/p>","protected":false},"excerpt":{"rendered":"<p>The primary difference between a normal open contactor and a normal closed contactor is their state when they are not powered. A normal open (NO) contactor will have open circuits and close when they are energized, while a normal closed (NC) contactor will have closed circuits and open when they are energized. As a result, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2627,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2626","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/2626","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/comments?post=2626"}],"version-history":[{"count":1,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/2626\/revisions"}],"predecessor-version":[{"id":2630,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/2626\/revisions\/2630"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media\/2627"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media?parent=2626"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/categories?post=2626"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/tags?post=2626"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}