{"id":7120,"date":"2024-09-24T16:25:33","date_gmt":"2024-09-24T08:25:33","guid":{"rendered":"https:\/\/viox.com\/?p=7120"},"modified":"2026-03-28T16:50:34","modified_gmt":"2026-03-28T08:50:34","slug":"full-guide-to-molded-case-circuit-breakers-mccbs","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/full-guide-to-molded-case-circuit-breakers-mccbs\/","title":{"rendered":"Aptomat v\u1ecf \u0111\u00fac (MCCB) l\u00e0 g\u00ec? H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng, c\u00e1c th\u00e0nh ph\u1ea7n, th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c v\u00e0 \u1ee9ng d\u1ee5ng"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>Tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp<\/h2>\n<figure style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/img.viox.com\/Molded-case-circuit-breaker-installed-in-a-low-voltage-industrial-distribution-panel.webp\" alt=\"Molded case circuit breaker installed in a low voltage industrial distribution panel\" \/><figcaption><em>M\u1ed9t \u00e1pt\u00f4m\u00e1t v\u1ecf \u0111\u00fac (MCCB) h\u1ea1ng n\u1eb7ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t an to\u00e0n b\u00ean trong t\u1ee7 \u0111i\u1ec7n ph\u00e2n ph\u1ed1i c\u00f4ng nghi\u1ec7p h\u1ea1 th\u1ebf, s\u1eb5n s\u00e0ng b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i.<\/em><\/figcaption><\/figure>\n<p>M\u1ed9t <strong>\u5851\u58f3\u65ad\u8def\u5668\uff08MCCB\uff09<\/strong> l\u00e0 m\u1ed9t \u00e1pt\u00f4m\u00e1t h\u1ea1 th\u1ebf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n, m\u1ea1ch nh\u00e1nh l\u1edbn h\u01a1n, ngu\u1ed3n cung c\u1ea5p m\u00e1y m\u00f3c v\u00e0 thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i ch\u1ed1ng l\u1ea1i qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch. So v\u1edbi m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a>, nh\u1ecf h\u01a1n, MCCB th\u01b0\u1eddng cung c\u1ea5p d\u1ea3i d\u00f2ng \u0111i\u1ec7n cao h\u01a1n, kh\u1ea3 n\u0103ng c\u1eaft cao h\u01a1n v\u00e0 c\u00e1c t\u00f9y ch\u1ecdn b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 linh ho\u1ea1t h\u01a1n cho c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p.<\/p>\n<p>V\u1ec1 m\u1eb7t th\u1ef1c t\u1ebf, MCCB n\u1eb1m \u1edf gi\u1eefa h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p b\u1ea3o v\u1ec7 h\u1ea1 th\u1ebf:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a><\/strong> cho c\u00e1c m\u1ea1ch cu\u1ed1i nh\u1ecf h\u01a1n<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/mccb\/\"><strong>MCCB<\/strong><\/a> cho c\u00e1c \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n l\u1edbn h\u01a1n v\u00e0 b\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n<\/li>\n<li><strong><a href=\"https:\/\/test.viox.com\/vi\/acb\/\">Ng\u00e2n h\u00e0ng<\/a><\/strong> cho c\u00e1c vai tr\u00f2 b\u1ea3ng \u0111i\u1ec7n h\u1ea1 th\u1ebf c\u00f3 d\u00f2ng \u0111i\u1ec7n cao nh\u1ea5t<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n \u0111ang c\u1ed1 g\u1eafng quy\u1ebft \u0111\u1ecbnh xem h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh c\u00f3 v\u01b0\u1ee3t qu\u00e1 m\u1ed9t \u00e1pt\u00f4m\u00e1t thu nh\u1ecf hay kh\u00f4ng, th\u00ec \u0111\u00f3 l\u00e0 ng\u01b0\u1ee1ng th\u1ef1c t\u1ebf: <strong>MCCB l\u00e0 \u00e1pt\u00f4m\u00e1t h\u1ea1 th\u1ebf h\u1ea1ng n\u1eb7ng h\u01a1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ea1ch c\u1ea7n c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n v\u00e0 t\u00ednh linh ho\u1ea1t b\u1ea3o v\u1ec7 cao h\u01a1n so v\u1edbi \u00e1pt\u00f4m\u00e1t thu nh\u1ecf th\u01b0\u1eddng c\u00f3 th\u1ec3 cung c\u1ea5p.<\/strong><\/p>\n<p>N\u1ebfu b\u1ea1n ch\u1ec9 c\u1ea7n gi\u1ea3i th\u00edch t\u1eeb vi\u1ebft t\u1eaft, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/mccb-full-form-molded-case-circuit-breaker\/\">D\u1ea1ng \u0110\u1ea7y \u0110\u1ee7 C\u1ee7a MCCB: Molded Case Circuit Breaker (Aptomat v\u1ecf \u0111\u00fac)<\/a>.<\/p>\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li>MCCB l\u00e0 m\u1ed9t <strong>aptomat v\u1ecf \u0111\u00fac<\/strong> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n h\u1ea1 th\u1ebf v\u00e0 b\u1ea3o v\u1ec7 m\u1ea1ch c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n.<\/li>\n<li>MCCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi d\u00f2ng \u0111i\u1ec7n, m\u1ee9c s\u1ef1 c\u1ed1 ho\u1eb7c y\u00eau c\u1ea7u c\u00e0i \u0111\u1eb7t b\u1ea3o v\u1ec7 v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi th\u1ef1c t\u1ebf c\u1ee7a <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">C\u00f4ng<\/a>.<\/li>\n<li>\u0110i\u1ec1u quan tr\u1ecdng nh\u1ea5t c\u1ea7n hi\u1ec3u l\u00e0: b\u00ean trong MCCB c\u00f3 g\u00ec, c\u00e1ch n\u00f3 t\u00e1c \u0111\u1ed9ng v\u00e0 nh\u1eefng th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c n\u00e0o quan tr\u1ecdng.<\/li>\n<li>C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c ch\u00ednh kh\u00f4ng ch\u1ec9 l\u00e0 d\u00f2ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec7n \u00e1p. Ch\u00fang c\u0169ng bao g\u1ed3m kh\u1ea3 n\u0103ng c\u1eaft, lo\u1ea1i b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 v\u00e0 c\u00e1c y\u00eau c\u1ea7u v\u1ec1 ph\u1ee5 ki\u1ec7n.<\/li>\n<li>H\u01b0\u1edbng d\u1eabn v\u1ec1 MCCB n\u00ean gi\u1ea3i th\u00edch c\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n tr\u01b0\u1edbc. Vi\u1ec7c l\u1ef1a ch\u1ecdn, so s\u00e1nh v\u00e0 \u0111i\u1ec1u ch\u1ec9nh b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 chi ti\u1ebft sau \u0111\u00f3 c\u00f3 th\u1ec3 ph\u00e2n nh\u00e1nh th\u00e0nh c\u00e1c trang chuy\u00ean bi\u1ec7t h\u01a1n.<\/li>\n<\/ul>\n<h2>MCCB l\u00e0 g\u00ec?<\/h2>\n<p>MCCB l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng \u0111\u01b0\u1ee3c bao b\u1ecdc trong m\u1ed9t v\u1ecf c\u00e1ch \u0111i\u1ec7n \u0111\u00fac. N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c h\u1ec7 th\u1ed1ng h\u1ea1 th\u1ebf, n\u01a1i m\u1ea1ch y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 m\u1ea1nh m\u1ebd h\u01a1n so v\u1edbi m\u1ed9t \u00e1pt\u00f4m\u00e1t nh\u00e1nh thu nh\u1ecf th\u00f4ng th\u01b0\u1eddng c\u00f3 th\u1ec3 cung c\u1ea5p.<\/p>\n<p>C\u1ee5m t\u1eeb <code>v\u1ecf \u0111\u00fac<\/code> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn v\u1ecf c\u00e1ch \u0111i\u1ec7n ch\u1ee9a c\u00e1c ti\u1ebfp \u0111i\u1ec3m d\u1eabn \u0111i\u1ec7n, c\u01a1 c\u1ea5u v\u1eadn h\u00e0nh, c\u1ea5u tr\u00fac d\u1eadp h\u1ed3 quang v\u00e0 b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7. \u00c1pt\u00f4m\u00e1t kh\u00f4ng ph\u1ea3i l\u00e0 lo\u1ea1i khung h\u1edf nh\u01b0 ACB, v\u00e0 n\u00f3 kh\u00f4ng nh\u1ecf g\u1ecdn ho\u1eb7c h\u1ea1n ch\u1ebf v\u1ec1 c\u00f4ng su\u1ea5t nh\u01b0 m\u1ed9t \u00e1pt\u00f4m\u00e1t thu nh\u1ecf g\u1eafn tr\u00ean ray DIN.<\/p>\n<p>Trong h\u1ea7u h\u1ebft c\u00e1c c\u00e0i \u0111\u1eb7t th\u1ef1c t\u1ebf, MCCB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho:<\/p>\n<ul>\n<li>\u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n \u0111i ra t\u1eeb b\u1ea3ng ph\u00e2n ph\u1ed1i<\/li>\n<li>m\u1ea1ch \u0111\u1ed9ng c\u01a1 v\u00e0 m\u00e1y m\u00f3c l\u1edbn h\u01a1n<\/li>\n<li>ph\u00e2n ph\u1ed1i th\u1ee9 c\u1ea5p<\/li>\n<li>b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n li\u00ean quan \u0111\u1ebfn m\u00e1y ph\u00e1t \u0111i\u1ec7n v\u00e0 chuy\u1ec3n m\u1ea1ch<\/li>\n<li>b\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh b\u1ea3ng \u0111i\u1ec7n v\u00e0 t\u1ee7 \u0111i\u1ec7n tr\u00ean c\u00e1c nhi\u1ec7m v\u1ee5 MCB th\u00f4ng th\u01b0\u1eddng<\/li>\n<\/ul>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n xem \u1edf c\u1ea5p \u0111\u1ed9 s\u1ea3n ph\u1ea9m h\u01a1n l\u00e0 t\u1ed5ng quan v\u1ec1 gi\u00e1o d\u1ee5c, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">trang VIOX MCCB<\/a>.<\/p>\n<h2>C\u00e1ch MCCB Ho\u1ea1t \u0110\u1ed9ng<\/h2>\n<figure style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/img.viox.com\/Technical-diagram-showing-how-a-molded-case-circuit-breaker-detects-faults-and-interrupts-current.webp\" alt=\"Technical diagram showing how a molded case circuit breaker detects faults and interrupts current\" \/><figcaption><em>S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt t\u1eebng b\u01b0\u1edbc minh h\u1ecda qu\u00e1 tr\u00ecnh ph\u00e1t hi\u1ec7n l\u1ed7i v\u00e0 ng\u1eaft d\u00f2ng \u0111i\u1ec7n c\u1ee7a MCCB trong \u0111i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch.<\/em><\/figcaption><\/figure>\n<p>\u1ede c\u1ea5p \u0111\u1ed9 cao, MCCB th\u1ef1c hi\u1ec7n hai c\u00f4ng vi\u1ec7c:<\/p>\n<ol>\n<li>N\u00f3 mang d\u00f2ng \u0111i\u1ec7n t\u1ea3i b\u00ecnh th\u01b0\u1eddng li\u00ean t\u1ee5c trong ph\u1ea1m vi \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3.<\/li>\n<li>N\u00f3 t\u1ef1 \u0111\u1ed9ng m\u1edf m\u1ea1ch khi \u0111i\u1ec1u ki\u1ec7n l\u1ed7i v\u01b0\u1ee3t qu\u00e1 \u0111\u1eb7c t\u00ednh b\u1ea3o v\u1ec7 c\u1ee7a n\u00f3.<\/li>\n<\/ol>\n<p>\u00c1pt\u00f4m\u00e1t ph\u00e1t hi\u1ec7n l\u1ed7i th\u00f4ng qua h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 c\u1ee7a n\u00f3, c\u00f3 th\u1ec3 l\u00e0:<\/p>\n<ul>\n<li><strong>nhi\u1ec7t-t\u1eeb<\/strong><\/li>\n<li><strong>\u0111i\u1ec7n t\u1eed<\/strong><\/li>\n<\/ul>\n<p>Trong m\u1ed9t MCCB nhi\u1ec7t-t\u1eeb:<\/p>\n<ul>\n<li>ph\u1ea7n t\u1eed nhi\u1ec7t ph\u1ea3n \u1ee9ng v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i<\/li>\n<li>ph\u1ea7n t\u1eed t\u1eeb ph\u1ea3n \u1ee9ng v\u1edbi d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch cao h\u01a1n<\/li>\n<\/ul>\n<p>Trong m\u1ed9t MCCB \u0111i\u1ec7n t\u1eed:<\/p>\n<ul>\n<li>d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111o ch\u00ednh x\u00e1c h\u01a1n<\/li>\n<li>logic b\u1ea3o v\u1ec7 th\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh tr\u00ean nhi\u1ec1u ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7<\/li>\n<li>kh\u1ea3 n\u0103ng ph\u1ed1i h\u1ee3p v\u00e0 t\u00ednh linh ho\u1ea1t \u1ee9ng d\u1ee5ng th\u01b0\u1eddng cao h\u01a1n<\/li>\n<\/ul>\n<p>Trong c\u00e1c \u1ee9ng d\u1ee5ng n\u00e2ng cao h\u01a1n, \u0111i\u1ec1u \u0111\u00f3 th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 k\u1ef9 s\u01b0 kh\u00f4ng c\u00f2n ch\u1ec9 ngh\u0129 \u0111\u1ebfn vi\u1ec7c \u201cn\u00f3 s\u1ebd t\u00e1c \u0111\u1ed9ng ch\u1ee9?\u201d m\u00e0 c\u00f2n v\u1ec1 <strong>l\u00e0m th\u1ebf n\u00e0o<\/strong> n\u00f3 t\u00e1c \u0111\u1ed9ng. C\u00e1c b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 \u0111i\u1ec7n t\u1eed th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn th\u00f4ng qua c\u00e1c ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 nh\u01b0 <code>L<\/code>, <code>S<\/code>, <code>T\u00f4i<\/code>, v\u00e0 \u0111\u00f4i khi <code>G<\/code>:<\/p>\n<ul>\n<li><code>L<\/code> = b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i<\/li>\n<li><code>S<\/code> = b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch c\u00f3 tr\u1ec5<\/li>\n<li><code>T\u00f4i<\/code> = b\u1ea3o v\u1ec7 t\u1ee9c th\u1eddi<\/li>\n<li><code>G<\/code> = b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t n\u1ebfu \u0111\u01b0\u1ee3c cung c\u1ea5p<\/li>\n<\/ul>\n<p>C\u00e1c c\u00e0i \u0111\u1eb7t \u0111\u00f3 \u0111\u1ecbnh h\u00ecnh <strong>\u0111\u1eb7c t\u00ednh th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n (TCC)<\/strong> c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 l\u00e0 trung t\u00e2m c\u1ee7a c\u00e1c nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p. N\u00f3i c\u00e1ch kh\u00e1c, m\u1ed9t MCCB \u0111i\u1ec7n t\u1eed th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ecdn kh\u00f4ng ch\u1ec9 v\u00ec d\u00f2ng \u0111i\u1ec7n cao h\u01a1n m\u00e0 c\u00f2n v\u00ec h\u00e0nh vi b\u1ea3o v\u1ec7 c\u1ee7a n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<p>B\u1ea3n th\u00e2n tr\u00ecnh t\u1ef1 ng\u1eaft l\u00e0 c\u01a1 h\u1ecdc v\u00e0 \u0111i\u1ec7n. Khi b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 ra l\u1ec7nh cho \u00e1pt\u00f4m\u00e1t m\u1edf, c\u00e1c ti\u1ebfp \u0111i\u1ec3m t\u00e1ch ra, m\u1ed9t h\u1ed3 quang h\u00ecnh th\u00e0nh v\u00e0 h\u1ed3 quang b\u1ecb \u00e9p v\u00e0o c\u1ea5u tr\u00fac \u0111i\u1ec1u khi\u1ec3n h\u1ed3 quang cho \u0111\u1ebfn khi d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 b\u1ecb ng\u1eaft m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n<p>\u0110\u1ec3 so s\u00e1nh c\u00f4ng ngh\u1ec7 chi ti\u1ebft, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/electronic-vs-thermal-magnetic-mccb\/\">MCCB \u0111i\u1ec7n t\u1eed so v\u1edbi nhi\u1ec7t-t\u1eeb<\/a>.<\/p>\n<h2>B\u00ean Trong MCCB C\u00f3 G\u00ec?<\/h2>\n<figure style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/img.viox.com\/Technical-infographic-showing-the-main-internal-parts-of-a-molded-case-circuit-breaker.webp\" alt=\"Technical infographic showing the main internal parts of a molded case circuit breaker\" \/><figcaption><em>Ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt chi ti\u1ebft v\u1ec1 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong c\u1ee7a MCCB, gi\u1edbi thi\u1ec7u b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7, bu\u1ed3ng d\u1eadp h\u1ed3 quang v\u00e0 v\u1ecf \u0111\u00fac ch\u1eafc ch\u1eafn.<\/em><\/figcaption><\/figure>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng c\u00e1ch h\u1eefu \u00edch nh\u1ea5t \u0111\u1ec3 tr\u1ea3 l\u1eddi <code>b\u00ean trong mccb<\/code> truy v\u1ea5n, b\u1edfi v\u00ec nhi\u1ec1u \u0111\u1ed9c gi\u1ea3 th\u1ef1c s\u1ef1 \u0111ang h\u1ecfi thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o nh\u01b0 th\u1ebf n\u00e0o v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i \u0111\u1eaft h\u01a1n m\u1ed9t \u00e1pt\u00f4m\u00e1t thu nh\u1ecf.<\/p>\n<p>C\u00e1c ph\u1ea7n b\u00ean trong \u0111i\u1ec3n h\u00ecnh c\u1ee7a MCCB bao g\u1ed3m:<\/p>\n<h3>1. V\u1ecf C\u00e1ch \u0110i\u1ec7n \u0110\u00fac<\/h3>\n<p>V\u1ecf cung c\u1ea5p b\u1ea3o v\u1ec7 c\u01a1 h\u1ecdc, c\u00e1ch \u0111i\u1ec7n, \u1ed5n \u0111\u1ecbnh k\u00edch th\u01b0\u1edbc v\u00e0 h\u1ed7 tr\u1ee3 cho c\u00e1c b\u1ed9 ph\u1eadn b\u00ean trong. N\u00f3 ph\u1ea3i ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t, \u1ee9ng su\u1ea5t s\u1ef1 c\u1ed1 v\u00e0 tu\u1ed5i th\u1ecd d\u00e0i trong t\u1ee7 \u0111i\u1ec7n v\u00e0 b\u1ea3ng \u0111i\u1ec7n.<\/p>\n<h3>2. Ti\u1ebfp \u0110i\u1ec3m C\u1ed1 \u0110\u1ecbnh v\u00e0 Di \u0110\u1ed9ng<\/h3>\n<p>Ch\u00fang mang d\u00f2ng \u0111i\u1ec7n trong ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u00e0 t\u00e1ch ra khi b\u1ed9 ng\u1eaft m\u1ea1ch t\u00e1c \u0111\u1ed9ng. Thi\u1ebft k\u1ebf ti\u1ebfp \u0111i\u1ec3m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ef1 t\u0103ng nhi\u1ec7t, \u0111\u1ed9 tin c\u1eady v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111i\u1ec7n.<\/p>\n<h3>3. C\u01a1 c\u1ea5u v\u1eadn h\u00e0nh<\/h3>\n<p>C\u01a1 c\u1ea5u v\u1eadn h\u00e0nh t\u00edch tr\u1eef v\u00e0 gi\u1ea3i ph\u00f3ng n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 \u0111\u00f3ng ho\u1eb7c m\u1edf c\u00e1c ti\u1ebfp \u0111i\u1ec3m. \u0110\u00e2y l\u00e0 b\u1ed9 ph\u1eadn m\u00e0 ng\u01b0\u1eddi d\u00f9ng t\u01b0\u01a1ng t\u00e1c th\u00f4ng qua tay c\u1ea7m, nh\u01b0ng n\u00f3 c\u0169ng l\u00e0 h\u1ec7 th\u1ed1ng c\u01a1 kh\u00ed \u0111\u1ea3m b\u1ea3o c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf d\u1ee9t kho\u00e1t trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1.<\/p>\n<h3>4. B\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 (Trip Unit)<\/h3>\n<p>B\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 l\u00e0 b\u1ed9 n\u00e3o b\u1ea3o v\u1ec7 c\u1ee7a MCCB. T\u00f9y thu\u1ed9c v\u00e0o lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch, n\u00f3 c\u00f3 th\u1ec3 l\u00e0:<\/p>\n<ul>\n<li>nhi\u1ec7t-t\u1eeb<\/li>\n<li>\u0111i\u1ec7n t\u1eed v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/li>\n<\/ul>\n<p>Trong c\u00e1c thi\u1ebft k\u1ebf ti\u00ean ti\u1ebfn h\u01a1n, b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 h\u1ed7 tr\u1ee3 c\u00e1c ch\u1ee9c n\u0103ng nh\u01b0 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i (long-time), b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch (short-time) v\u00e0 b\u1ea3o v\u1ec7 t\u1ee9c th\u1eddi (instantaneous), v\u00e0 \u0111\u00f4i khi c\u00f3 th\u00eam logic t\u00f9y thu\u1ed9c v\u00e0o d\u00f2ng s\u1ea3n ph\u1ea9m.<\/p>\n<h3>5. Bu\u1ed3ng d\u1eadp h\u1ed3 quang ho\u1eb7c c\u1ea5u tr\u00fac ng\u1eaft h\u1ed3 quang<\/h3>\n<p>Khi b\u1ed9 ng\u1eaft m\u1ea1ch m\u1edf d\u01b0\u1edbi d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1, m\u1ed9t h\u1ed3 quang \u0111i\u1ec7n h\u00ecnh th\u00e0nh. Bu\u1ed3ng d\u1eadp h\u1ed3 quang k\u00e9o d\u00e0i, l\u00e0m m\u00e1t v\u00e0 chia nh\u1ecf h\u1ed3 quang \u0111\u1ec3 b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n<h3>6. \u0110\u1ea7u n\u1ed1i \u0111\u01b0\u1eddng d\u00e2y v\u00e0 t\u1ea3i<\/h3>\n<p>Ch\u00fang k\u1ebft n\u1ed1i MCCB v\u00e0o h\u1ec7 th\u1ed1ng. Trong c\u00f4ng vi\u1ec7c l\u1eafp \u0111\u1eb7t th\u1ef1c t\u1ebf, ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ea7u n\u1ed1i, ki\u1ec3m so\u00e1t m\u00f4-men xo\u1eafn, \u0111\u1ed9 v\u1eeba v\u1eb7n c\u1ee7a d\u00e2y d\u1eabn v\u00e0 giao di\u1ec7n thanh c\u00e1i \u0111\u1ec1u quan tr\u1ecdng \u0111\u1ed1i v\u1edbi \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i.<\/p>\n<h3>7. Ph\u1ee5 ki\u1ec7n<\/h3>\n<p>Nhi\u1ec1u MCCB h\u1ed7 tr\u1ee3 c\u00e1c ph\u1ee5 ki\u1ec7n nh\u01b0:<\/p>\n<ul>\n<li>ti\u1ebfp \u0111i\u1ec3m ph\u1ee5<\/li>\n<li>cu\u1ed9n c\u1eaft (shunt trips)<\/li>\n<li>nh\u1ea3 \u0111i\u1ec7n \u00e1p th\u1ea5p<\/li>\n<li>b\u1ed9 v\u1eadn h\u00e0nh b\u1eb1ng \u0111\u1ed9ng c\u01a1 (motor operators)<\/li>\n<li>ti\u1ebfp \u0111i\u1ec3m b\u00e1o \u0111\u1ed9ng (alarm contacts)<\/li>\n<\/ul>\n<p>Ch\u00fang bi\u1ebfn b\u1ed9 ng\u1eaft m\u1ea1ch t\u1eeb m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u01a1n gi\u1ea3n th\u00e0nh m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 gi\u00e1m s\u00e1t r\u1ed9ng l\u1edbn h\u01a1n.<\/p>\n<p>N\u1ebfu c\u00e1c ph\u1ee5 ki\u1ec7n l\u00e0 tr\u1ecdng t\u00e2m trong \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n, c\u00e1c ch\u1ee7 \u0111\u1ec1 chuy\u00ean bi\u1ec7t li\u00ean quan nh\u01b0 ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 v\u00e0 ch\u1ee9c n\u0103ng c\u1eaft \u0111i\u1ec7n \u00e1p th\u1ea5p (shunt-trip) r\u1ea5t \u0111\u00e1ng \u0111\u1ec3 \u0111\u1ec1 c\u1eadp ri\u00eang.<\/p>\n<h2>C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c ch\u00ednh c\u1ee7a MCCB b\u1ea1n n\u00ean hi\u1ec3u<\/h2>\n<figure style=\"text-align: center;\"><img decoding=\"async\" src=\"https:\/\/img.viox.com\/Technical-infographic-showing-key-MCCB-ratings-including-Icu-Ics-and-LSIG-trip-functions.webp\" alt=\"Technical infographic showing key MCCB ratings including Icu Ics and LSIG trip functions\" \/><figcaption><em>T\u1ed5ng quan to\u00e0n di\u1ec7n v\u1ec1 c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c quan tr\u1ecdng c\u1ee7a MCCB, chi ti\u1ebft v\u1ec1 kh\u1ea3 n\u0103ng c\u1eaft Icu, Ics v\u00e0 c\u00e1c ch\u1ee9c n\u0103ng \u0111\u01b0\u1eddng cong b\u1ea3o v\u1ec7 \u0111i\u1ec7n t\u1eed.<\/em><\/figcaption><\/figure>\n<p>M\u1ed9t l\u00fd do khi\u1ebfn c\u00e1c k\u1ef9 s\u01b0 chuy\u1ec3n t\u1eeb c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn \u0111\u01a1n gi\u1ea3n v\u1ec1 b\u1ed9 ng\u1eaft m\u1ea1ch sang n\u1ed9i dung c\u1ee5 th\u1ec3 v\u1ec1 MCCB l\u00e0 v\u00ec c\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c b\u1eaft \u0111\u1ea7u quan tr\u1ecdng h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<h3>B\u00ecnh Hi\u1ec7n T\u1ea1i<\/h3>\n<p>\u0110\u00e2y l\u00e0 d\u00f2ng \u0111i\u1ec7n m\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch d\u1ef1 ki\u1ebfn \u200b\u200bs\u1ebd mang trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n x\u00e1c \u0111\u1ecbnh. \u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng gi\u00e1 tr\u1ecb \u0111\u1ea7u ti\u00ean m\u00e0 m\u1ecdi ng\u01b0\u1eddi xem x\u00e9t, nh\u01b0ng n\u00f3 kh\u00f4ng ph\u1ea3i l\u00e0 gi\u00e1 tr\u1ecb duy nh\u1ea5t quan tr\u1ecdng.<\/p>\n<h3>K\u00edch Th\u01b0\u1edbc Khung<\/h3>\n<p>Khung x\u00e1c \u0111\u1ecbnh n\u1ec1n t\u1ea3ng v\u1eadt l\u00fd c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch v\u00e0 ph\u1ea1m vi d\u00f2ng \u0111i\u1ec7n. C\u00e1c c\u00e0i \u0111\u1eb7t b\u1ea3o v\u1ec7 kh\u00e1c nhau c\u00f3 th\u1ec3 t\u1ed3n t\u1ea1i trong c\u00f9ng m\u1ed9t d\u00f2ng khung.<\/p>\n<h3>\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/h3>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng v\u00e0 b\u1ed1i c\u1ea3nh \u1ee9ng d\u1ee5ng, bao g\u1ed3m c\u1ea3 t\u00ednh ph\u00f9 h\u1ee3p v\u1edbi AC ho\u1eb7c DC khi th\u00edch h\u1ee3p.<\/p>\n<h3>S\u1ed1 c\u1ef1c<\/h3>\n<p>C\u00e1c c\u1ea5u h\u00ecnh c\u1ef1c ph\u1ed5 bi\u1ebfn bao g\u1ed3m:<\/p>\n<ul>\n<li>2 c\u1ef1c<\/li>\n<li>3 c\u1ef1c<\/li>\n<li>4 c\u1ef1c<\/li>\n<\/ul>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn s\u1ed1 c\u1ef1c ph\u1ee5 thu\u1ed9c v\u00e0o ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng, y\u00eau c\u1ea7u chuy\u1ec3n m\u1ea1ch d\u00e2y d\u1eabn v\u00e0 x\u1eed l\u00fd d\u00e2y trung t\u00ednh.<\/p>\n<h3>Kh\u1ea3 N\u0103ng Ph\u00e1 V\u1ee1<\/h3>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t c\u1ee7a MCCB. B\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ng\u1eaft d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 ti\u1ec1m n\u0103ng c\u00f3 s\u1eb5n t\u1ea1i \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t.<\/p>\n<p>C\u00e1c thu\u1eadt ng\u1eef ch\u00ednh th\u01b0\u1eddng bao g\u1ed3m:<\/p>\n<ul>\n<li><code>Icu<\/code><\/li>\n<li><code>Ics<\/code><\/li>\n<\/ul>\n<p>C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ecbnh m\u1ee9c n\u00e0y \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 th\u1ef1c t\u1ebf v\u00e0 k\u1ef3 v\u1ecdng d\u1ecbch v\u1ee5 c\u1ee7a h\u1ec7 th\u1ed1ng hay kh\u00f4ng.<\/p>\n<p>\u0110\u1ec3 th\u1ea3o lu\u1eadn t\u1eadp trung h\u01a1n, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/how-to-read-mccb-nameplates-for-electrical-safety\/\">C\u00e1ch \u0110\u1ecdc Nh\u00e3n M\u00e1c MCCB \u0110\u1ec3 \u0110\u1ea3m B\u1ea3o An To\u00e0n \u0110i\u1ec7n<\/a>.<\/p>\n<h3>Lo\u1ea1i b\u1ed9 Trip<\/h3>\n<p>Ki\u1ebfn tr\u00fac c\u1ee7a b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 \u1ea3nh h\u01b0\u1edfng m\u1ea1nh m\u1ebd \u0111\u1ebfn:<\/p>\n<ul>\n<li>kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh<\/li>\n<li>s\u1ef1 ph\u1ed1i h\u1ee3p<\/li>\n<li>kh\u1ea3 n\u0103ng l\u1eb7p l\u1ea1i<\/li>\n<li>ti\u1ec1m n\u0103ng gi\u00e1m s\u00e1t<\/li>\n<\/ul>\n<p>\u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao h\u01b0\u1edbng d\u1eabn v\u1ec1 MCCB n\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn lo\u1ea1i b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 ngay c\u1ea3 \u1edf c\u1ea5p \u0111\u1ed9 c\u01a1 b\u1ea3n.<\/p>\n<h2>C\u00e1c lo\u1ea1i MCCB ph\u1ed5 bi\u1ebfn<\/h2>\n<p>C\u00f3 m\u1ed9t s\u1ed1 c\u00e1ch h\u1eefu \u00edch \u0111\u1ec3 ph\u00e2n lo\u1ea1i MCCB. M\u1ed9t h\u01b0\u1edbng d\u1eabn th\u1ef1c t\u1ebf n\u00ean gi\u1eef cho vi\u1ec7c ph\u00e2n lo\u1ea1i \u0111\u01a1n gi\u1ea3n.<\/p>\n<h3>Theo c\u00f4ng ngh\u1ec7 b\u1ea3o v\u1ec7 (Trip Technology)<\/h3>\n<ul>\n<li>MCCB nhi\u1ec7t t\u1eeb (thermal-magnetic MCCB)<\/li>\n<li>MCCB \u0111i\u1ec7n t\u1eed (electronic MCCB)<\/li>\n<\/ul>\n<p>\u0110\u00e2y th\u01b0\u1eddng l\u00e0 ph\u00e2n lo\u1ea1i c\u00f3 \u00fd ngh\u0129a nh\u1ea5t trong c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf v\u00ec n\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e0i \u0111\u1eb7t, \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 ph\u1ed1i h\u1ee3p. Khi m\u1ed9t h\u1ec7 th\u1ed1ng y\u00eau c\u1ea7u ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc, ki\u1ec3m so\u00e1t c\u00e0i \u0111\u1eb7t ch\u1eb7t ch\u1ebd h\u01a1n ho\u1eb7c logic b\u1ea3o v\u1ec7 n\u00e2ng cao h\u01a1n, cu\u1ed9c tr\u00f2 chuy\u1ec7n th\u01b0\u1eddng chuy\u1ec3n sang c\u00e1c b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 \u0111i\u1ec7n t\u1eed v\u00e0 h\u00e0nh vi TCC c\u1ee7a ch\u00fang h\u01a1n l\u00e0 l\u1ef1a ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ea3o v\u1ec7 c\u1ed1 \u0111\u1ecbnh \u0111\u01a1n gi\u1ea3n.<\/p>\n<h3>Theo nhi\u1ec7m v\u1ee5 \u1ee9ng d\u1ee5ng (Application Duty)<\/h3>\n<p>M\u1ed9t s\u1ed1 MCCB \u0111\u01b0\u1ee3c ch\u1ecdn \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y \u0111\u01a1n gi\u1ea3n, trong khi nh\u1eefng MCCB kh\u00e1c \u0111\u01b0\u1ee3c ch\u1ecdn v\u00ec \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u:<\/p>\n<ul>\n<li>hi\u1ec7u su\u1ea5t ng\u1eaft cao h\u01a1n<\/li>\n<li>h\u00e0nh vi b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec1u h\u01a1n<\/li>\n<li>h\u1ed7 tr\u1ee3 ph\u1ed1i h\u1ee3p m\u1ea1nh m\u1ebd h\u01a1n<\/li>\n<li>t\u00edch h\u1ee3p ph\u1ee5 ki\u1ec7n<\/li>\n<\/ul>\n<h3>Theo c\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng (Mounting and System Integration)<\/h3>\n<p>T\u00f9y thu\u1ed9c v\u00e0o nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 h\u1ec7 th\u1ed1ng, MCCB c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o b\u1ea3ng \u0111i\u1ec7n, t\u1ee7 \u0111i\u1ec7n, c\u1ee5m m\u00e1y m\u00f3c ho\u1eb7c c\u00e1c khoang b\u1ea3o v\u1ec7 chuy\u00ean d\u1ee5ng.<\/p>\n<p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft \u0111\u1ed9c gi\u1ea3, c\u00e2u h\u1ecfi h\u1eefu \u00edch kh\u00f4ng ph\u1ea3i l\u00e0 \u201cC\u00f3 bao nhi\u00eau lo\u1ea1i MCCB t\u1ed3n t\u1ea1i?\u201d m\u00e0 l\u00e0:<\/p>\n<p><strong>C\u00f4ng ngh\u1ec7 b\u1ea3o v\u1ec7, lo\u1ea1i \u0111\u1ecbnh m\u1ee9c v\u00e0 b\u1ed9 ph\u1ee5 ki\u1ec7n n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a t\u00f4i?<\/strong><\/p>\n<h2>MCCB \u0110\u01b0\u1ee3c S\u1eed D\u1ee5ng \u1ede \u0110\u00e2u?<\/h2>\n<p>MCCB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c h\u1ec7 th\u1ed1ng th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p \u0111i\u1ec7n h\u1ea1 th\u1ebf. C\u00e1c \u1ee9ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m:<\/p>\n<ul>\n<li>\u0111\u01b0\u1eddng d\u00e2y ch\u00ednh \u0111i ra t\u1eeb b\u1ea3ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n h\u1ea1 th\u1ebf<\/li>\n<li>\u0111\u01b0\u1eddng d\u00e2y ph\u00e2n ph\u1ed1i ph\u1ee5 v\u00e0 b\u1ea3ng \u0111i\u1ec7n<\/li>\n<li>m\u1ea1ch cung c\u1ea5p \u0111\u1ed9ng c\u01a1 v\u00e0 m\u00e1y m\u00f3c<\/li>\n<li>ph\u00e2n ph\u1ed1i HVAC<\/li>\n<li>b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y m\u00e1y ph\u00e1t \u0111i\u1ec7n<\/li>\n<li>c\u1ee5m ph\u00e2n ph\u1ed1i \u0111i\u1ec7n li\u00ean quan \u0111\u1ebfn chuy\u1ec3n m\u1ea1ch<\/li>\n<li>c\u00e1c m\u1ea1ch nh\u00e1nh l\u1edbn h\u01a1n n\u01a1i dung l\u01b0\u1ee3ng MCB kh\u00f4ng \u0111\u1ee7<\/li>\n<\/ul>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t l\u00fd do t\u1ea1i sao <code>mccbs<\/code> truy v\u1ea5n c\u00f3 xu h\u01b0\u1edbng thu h\u00fat c\u00e1c k\u1ef9 s\u01b0, nh\u00e0 ch\u1ebf t\u1ea1o b\u1ea3ng \u0111i\u1ec7n v\u00e0 \u0111\u1ed9i ng\u0169 mua s\u1eafm h\u01a1n l\u00e0 ng\u01b0\u1eddi d\u00f9ng d\u00e2n d\u1ee5ng th\u00f4ng th\u01b0\u1eddng. MCCB th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf nh\u1eefng n\u01a1i c\u00f3 nhi\u1ec7m v\u1ee5 h\u1ec7 th\u1ed1ng cao h\u01a1n v\u00e0 h\u1eadu qu\u1ea3 c\u1ee7a vi\u1ec7c l\u1ef1a ch\u1ecdn k\u00e9m nghi\u00eam tr\u1ecdng h\u01a1n.<\/p>\n<h2>So s\u00e1nh th\u1ef1c t\u1ebf ng\u1eafn g\u1ecdn MCCB so v\u1edbi MCB<\/h2>\n<p>Trang n\u00e0y n\u00ean gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n, nh\u01b0ng kh\u00f4ng thay th\u1ebf trang so s\u00e1nh chuy\u00ean d\u1ee5ng.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">N\u0103ng<\/th>\n<th style=\"padding: 8px;\">MCCB<\/th>\n<th style=\"padding: 8px;\">MCB<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">Vai tr\u00f2 \u0111i\u1ec3n h\u00ecnh<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y ch\u00ednh (feeder) v\u00e0 nh\u00e1nh c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n<\/td>\n<td style=\"padding: 8px;\">C\u00e1c m\u1ea1ch cu\u1ed1i nh\u1ecf h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Ph\u1ea1m vi d\u00f2ng \u0111i\u1ec7n<\/td>\n<td style=\"padding: 8px;\">R\u1ed9ng h\u01a1n v\u00e0 cao h\u01a1n<\/td>\n<td style=\"padding: 8px;\">Th\u1ea5p h\u01a1n v\u00e0 h\u1ea1n ch\u1ebf h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Kh\u1ea3 n\u0103ng ph\u00e1 v\u1ee1<\/td>\n<td style=\"padding: 8px;\">N\u00f3i chung l\u00e0 cao h\u01a1n<\/td>\n<td style=\"padding: 8px;\">N\u00f3i chung l\u00e0 th\u1ea5p h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">Linh ho\u1ea1t trong c\u00e0i \u0111\u1eb7t d\u00f2ng c\u1eaft<\/td>\n<td style=\"padding: 8px;\">Th\u01b0\u1eddng r\u1ed9ng h\u01a1n<\/td>\n<td style=\"padding: 8px;\">Th\u01b0\u1eddng \u0111\u01a1n gi\u1ea3n h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">\u1ee8ng d\u1ee5ng<\/td>\n<td style=\"padding: 8px;\">Ph\u00e2n ph\u1ed1i \u0111i\u1ec7n th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p<\/td>\n<td style=\"padding: 8px;\">M\u1ea1ch nh\u00e1nh d\u00e2n d\u1ee5ng v\u00e0 c\u00f4ng su\u1ea5t nh\u1eb9 h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>B\u00e0i h\u1ecdc th\u1ef1c t\u1ebf r\u1ea5t \u0111\u01a1n gi\u1ea3n:<\/p>\n<ul>\n<li>ch\u1ecdn <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> cho c\u00e1c m\u1ea1ch cu\u1ed1i nh\u1ecf h\u01a1n<\/li>\n<li>ch\u1ecdn MCCB khi m\u1ee9c c\u00f4ng su\u1ea5t, m\u1ee9c s\u1ef1 c\u1ed1 ho\u1eb7c t\u00ednh linh ho\u1ea1t c\u1ee7a b\u1ea3o v\u1ec7 v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi \u0111\u00f3<\/li>\n<\/ul>\n<p>\u0110\u1ec3 so s\u00e1nh chuy\u00ean d\u1ee5ng, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/mccb-vs-mcb\/\">MCCB so v\u1edbi MCB<\/a>.<\/p>\n<h2>C\u00e1ch ch\u1ecdn MCCB: Logic l\u1ef1a ch\u1ecdn c\u1ea5p cao<\/h2>\n<p>Trang n\u00e0y s\u1ebd cung c\u1ea5p cho ng\u01b0\u1eddi \u0111\u1ecdc khu\u00f4n kh\u1ed5, sau \u0111\u00f3 chuy\u1ec3n vi\u1ec7c \u0111\u1ecbnh c\u1ee1 chi ti\u1ebft cho h\u01b0\u1edbng d\u1eabn chuy\u00ean bi\u1ec7t.<\/p>\n<p>\u1ede c\u1ea5p \u0111\u1ed9 cao, vi\u1ec7c l\u1ef1a ch\u1ecdn MCCB b\u1eaft \u0111\u1ea7u v\u1edbi:<\/p>\n<ol>\n<li>D\u00f2ng t\u1ea3i<\/li>\n<li>\u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng<\/li>\n<li>s\u1ed1 c\u1ef1c<\/li>\n<li>d\u00f2ng ng\u1eafn m\u1ea1ch kh\u1ea3 d\u1ee5ng<\/li>\n<li>kh\u1ea3 n\u0103ng c\u1eaft y\u00eau c\u1ea7u<\/li>\n<li>lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li>c\u00e1c y\u00eau c\u1ea7u v\u1ec1 ph\u1ee5 ki\u1ec7n v\u00e0 \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>ph\u1ed1i h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ng\u01b0\u1ee3c d\u00f2ng v\u00e0 h\u1ea1 ngu\u1ed3n<\/li>\n<\/ol>\n<p>Nh\u01b0 v\u1eady l\u00e0 \u0111\u1ee7 cho trang c\u01a1 b\u1ea3n.<br \/>\nN\u1ebfu ng\u01b0\u1eddi \u0111\u1ecdc \u0111\u00e3 \u0111\u1ecbnh c\u1ee1 m\u1ed9t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n th\u1ef1c t\u1ebf, h\u1ecd n\u00ean \u0111i s\u00e2u h\u01a1n v\u00e0o h\u01b0\u1edbng d\u1eabn chuy\u00ean d\u1ee5ng: <a href=\"https:\/\/test.viox.com\/vi\/how-to-select-an-mccb-for-a-panel\/\">C\u00e1ch ch\u1ecdn MCCB cho b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/a>.<\/p>\n<h2>C\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 l\u1eafp \u0111\u1eb7t, b\u1ea3o tr\u00ec v\u00e0 ki\u1ec3m tra<\/h2>\n<p>MCCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 thi\u1ebft b\u1ecb b\u1ec1n, \u00edt c\u1ea7n b\u1ea3o tr\u00ec, nh\u01b0ng \u0111i\u1ec1u \u0111\u00f3 kh\u00f4ng n\u00ean b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi vi\u1ec7c \u201cb\u1ecf qua ch\u00fang m\u00e3i m\u00e3i\u201d.\u201d<\/p>\n<p>\u1ede c\u1ea5p \u0111\u1ed9 c\u01a1 b\u1ea3n, th\u1ef1c h\u00e0nh t\u1ed1t bao g\u1ed3m:<\/p>\n<ul>\n<li>k\u1ebft h\u1ee3p d\u00e2y d\u1eabn v\u00e0 \u0111\u1ea7u n\u1ed1i ch\u00ednh x\u00e1c<\/li>\n<li>\u00e1p d\u1ee5ng m\u00f4-men xo\u1eafn th\u00edch h\u1ee3p<\/li>\n<li>ki\u1ec3m tra nhi\u1ec7t c\u00e1c k\u1ebft n\u1ed1i c\u00f3 t\u1ea3i<\/li>\n<li>ki\u1ec3m tra tr\u1ef1c quan c\u00e1c h\u01b0 h\u1ecfng ho\u1eb7c qu\u00e1 nhi\u1ec7t<\/li>\n<li>ki\u1ec3m tra ch\u1ee9c n\u0103ng \u0111\u1ecbnh k\u1ef3 ph\u00f9 h\u1ee3p v\u1edbi vi\u1ec7c l\u1eafp \u0111\u1eb7t<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n t\u1eed, vi\u1ec7c ki\u1ec3m tra v\u00e0 x\u00e1c minh c\u00f3 th\u1ec3 v\u01b0\u1ee3t ra ngo\u00e0i ki\u1ec3m tra c\u01a1 h\u1ecdc \u0111\u01a1n gi\u1ea3n. M\u1ed9t k\u1ebf ho\u1ea1ch b\u1ea3o tr\u00ec th\u00edch h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o:<\/p>\n<ul>\n<li>c\u00f4ng su\u1ea5t c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li>l\u1ecbch s\u1eed s\u1ef1 c\u1ed1<\/li>\n<li>t\u00ednh quan tr\u1ecdng c\u1ee7a h\u1ec7 th\u1ed1ng<\/li>\n<li>h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<\/ul>\n<p>H\u01b0\u1edbng d\u1eabn n\u00e0y ch\u1ec9 c\u1ea7n thi\u1ebft l\u1eadp r\u1eb1ng vi\u1ec7c ki\u1ec3m tra l\u00e0 quan tr\u1ecdng. N\u00f3 kh\u00f4ng c\u1ea7n ph\u1ea3i tr\u1edf th\u00e0nh trang ki\u1ec3m tra chuy\u00ean d\u1ee5ng.<\/p>\n<h2>Nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn m\u1ecdi ng\u01b0\u1eddi m\u1eafc ph\u1ea3i v\u1edbi MCCB<\/h2>\n<h3>1. Coi \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n l\u00e0 y\u1ebfu t\u1ed1 l\u1ef1a ch\u1ecdn duy nh\u1ea5t<\/h3>\n<p>\u0110\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n r\u1ea5t quan tr\u1ecdng, nh\u01b0ng MCCB v\u1eabn c\u00f3 th\u1ec3 sai n\u1ebfu kh\u1ea3 n\u0103ng c\u1eaft, lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch ho\u1eb7c ph\u1ed1i h\u1ee3p kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<h3>2. S\u1eed d\u1ee5ng MCCB khi MCB c\u00f3 th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c<\/h3>\n<p>Vi\u1ec7c ch\u1ec9 \u0111\u1ecbnh qu\u00e1 m\u1ee9c b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 l\u00e3ng ph\u00ed ng\u00e2n s\u00e1ch v\u00e0 kh\u00f4ng gian m\u00e0 kh\u00f4ng mang l\u1ea1i gi\u00e1 tr\u1ecb th\u1ef1c.<\/p>\n<h3>3. S\u1eed d\u1ee5ng MCB khi c\u1ea7n MCCB<\/h3>\n<p>\u0110\u00e2y l\u00e0 l\u1ed7i ng\u01b0\u1ee3c l\u1ea1i v\u00e0 th\u01b0\u1eddng nguy hi\u1ec3m h\u01a1n. C\u00f4ng su\u1ea5t s\u1ef1 c\u1ed1 cao h\u01a1n, \u0111\u01b0\u1eddng d\u00e2y ch\u00ednh l\u1edbn h\u01a1n v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe h\u01a1n th\u01b0\u1eddng y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 c\u1ea5p MCCB.<\/p>\n<h3>4. B\u1ecf qua c\u00f4ng ngh\u1ec7 b\u1ed9 ng\u1eaft m\u1ea1ch<\/h3>\n<p>L\u1ef1a ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng ch\u1ec9 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t b\u1ea3o v\u1ec7 m\u00e0 c\u00f2n c\u1ea3 kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh v\u00e0 ch\u1ecdn l\u1ecdc.<\/p>\n<h3>5. B\u1ecf qua vi\u1ec7c xem x\u00e9t b\u1ea3ng t\u00ean<\/h3>\n<p>Nhi\u1ec1u l\u1ed7i l\u1ef1a ch\u1ecdn x\u1ea3y ra v\u00ec nh\u00e3n b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7. Kh\u1ea3 n\u0103ng c\u1eaft, khung v\u00e0 chi ti\u1ebft ng\u1eaft m\u1ea1ch \u0111\u1ec1u quan tr\u1ecdng.<\/p>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<h3>Aptomat v\u1ecf \u0111\u00fac (MCCB) l\u00e0 g\u00ec?<\/h3>\n<p>Aptomat v\u1ecf \u0111\u00fac (MCCB) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng \u0111i\u1ec7n h\u1ea1 th\u1ebf \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1ed9t v\u1ecf c\u00e1ch \u0111i\u1ec7n \u0111\u00fac. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n v\u00e0 c\u00e1c nh\u00e1nh c\u00f3 c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n, n\u01a1i m\u1ee9c d\u00f2ng \u0111i\u1ec7n, d\u00f2ng ng\u1eafn m\u1ea1ch ho\u1eb7c t\u00ednh linh ho\u1ea1t c\u1ee7a b\u1ed9 ng\u1eaft v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi th\u1ef1c t\u1ebf c\u1ee7a m\u1ed9t aptomat thu nh\u1ecf (MCB).<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCCB v\u00e0 MCB l\u00e0 g\u00ec?<\/h3>\n<p>MCCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c m\u1ea1ch \u0111i\u1ec7n l\u1edbn h\u01a1n, m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 cao h\u01a1n v\u00e0 c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 kh\u1eaft khe h\u01a1n, trong khi MCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c m\u1ea1ch \u0111i\u1ec7n cu\u1ed1i nh\u1ecf h\u01a1n v\u1edbi c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 \u0111\u01a1n gi\u1ea3n h\u01a1n.<\/p>\n<h3>B\u00ean trong m\u1ed9t MCCB c\u00f3 nh\u1eefng g\u00ec?<\/h3>\n<p>M\u1ed9t MCCB \u0111i\u1ec3n h\u00ecnh bao g\u1ed3m v\u1ecf c\u00e1ch \u0111i\u1ec7n \u0111\u00fac, c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ed1 \u0111\u1ecbnh v\u00e0 di \u0111\u1ed9ng, c\u01a1 c\u1ea5u v\u1eadn h\u00e0nh, b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7, c\u00e1c th\u00e0nh ph\u1ea7n ki\u1ec3m so\u00e1t h\u1ed3 quang, c\u00e1c \u0111\u1ea7u n\u1ed1i v\u00e0 th\u01b0\u1eddng c\u00f3 c\u00e1c ph\u1ee5 ki\u1ec7n t\u00f9y ch\u1ecdn nh\u01b0 ti\u1ebfp \u0111i\u1ec3m ph\u1ee5 ho\u1eb7c cu\u1ed9n c\u1eaft.<\/p>\n<h3>MCCB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf \u0111\u00e2u?<\/h3>\n<p>MCCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n h\u1ea1 th\u1ebf th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p, bao g\u1ed3m \u0111\u01b0\u1eddng d\u00e2y c\u1ea5p ngu\u1ed3n, m\u1ea1ch m\u00e1y m\u00f3c, b\u1ea3ng ph\u00e2n ph\u1ed1i th\u1ee9 c\u1ea5p v\u00e0 c\u00e1c m\u1ea1ch nh\u00e1nh l\u1edbn h\u01a1n.<\/p>\n<h3>Icu v\u00e0 Ics c\u00f3 \u00fd ngh\u0129a g\u00ec tr\u00ean MCCB?<\/h3>\n<p>\u0110\u00e2y l\u00e0 c\u00e1c th\u00f4ng s\u1ed1 li\u00ean quan \u0111\u1ebfn kh\u1ea3 n\u0103ng c\u1eaft, gi\u00fap x\u00e1c \u0111\u1ecbnh xem b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng ng\u1eafn m\u1ea1ch hi\u1ec7n c\u00f3 v\u00e0 nhi\u1ec7m v\u1ee5 v\u1eadn h\u00e0nh d\u1ef1 ki\u1ebfn trong h\u1ec7 th\u1ed1ng hay kh\u00f4ng.<\/p>\n<h3>C\u00f3 ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c MCCB \u0111\u1ec1u l\u00e0 lo\u1ea1i \u0111i\u1ec7n t\u1eed kh\u00f4ng?<\/h3>\n<p>C\u00e1c MCCB c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 b\u1ea3o v\u1ec7 b\u1eb1ng t\u1eeb nhi\u1ec7t ho\u1eb7c \u0111i\u1ec7n t\u1eed, t\u00f9y thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng v\u00e0 d\u00f2ng s\u1ea3n ph\u1ea9m.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c MCCB ph\u00f9 h\u1ee3p?<\/h3>\n<p>B\u1ea1n ch\u1ecdn MCCB ph\u00f9 h\u1ee3p b\u1eb1ng c\u00e1ch \u0111\u1ed1i chi\u1ebfu d\u00f2ng \u0111i\u1ec7n, \u0111i\u1ec7n \u00e1p, s\u1ed1 c\u1ef1c, m\u1ee9c s\u1ef1 c\u1ed1 hi\u1ec7n c\u00f3, kh\u1ea3 n\u0103ng c\u1eaft, lo\u1ea1i b\u1ed9 ph\u1eadn b\u1ea3o v\u1ec7 v\u00e0 c\u00e1c y\u00eau c\u1ea7u ph\u1ed1i h\u1ee3p c\u1ee7a h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n c\u00e2u tr\u1ea3 l\u1eddi r\u00f5 r\u00e0ng nh\u1ea5t cho <code>c\u1ea7u dao v\u1ecf \u0111\u00fac l\u00e0 g\u00ec<\/code>, n\u00f3 l\u00e0 th\u1ebf n\u00e0y:<\/p>\n<p><strong>MCCB l\u00e0 m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch h\u1ea1 th\u1ebf cho c\u00e1c \u0111\u01b0\u1eddng d\u00e2y ch\u00ednh v\u00e0 m\u1ea1ch nh\u00e1nh c\u00f3 c\u00f4ng su\u1ea5t cao h\u01a1n, n\u01a1i m\u1ee9c d\u00f2ng \u0111i\u1ec7n, m\u1ee9c s\u1ef1 c\u1ed1 ho\u1eb7c t\u00ednh linh ho\u1ea1t c\u1ee7a ng\u1eaft m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 ph\u1ea1m vi l\u00e0m vi\u1ec7c b\u00ecnh th\u01b0\u1eddng c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch thu nh\u1ecf.<\/strong><\/p>\n<p>\u0110\u00f3 c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao trang n\u00e0y n\u00ean t\u1ed3n t\u1ea1i ri\u00eang bi\u1ec7t v\u1edbi:<\/p>\n<ul>\n<li>c\u00e1c <a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">Trang s\u1ea3n ph\u1ea9m MCCB<\/a><\/li>\n<li>c\u00e1c <a href=\"https:\/\/test.viox.com\/vi\/mccb-vs-mcb\/\">Trang so s\u00e1nh MCCB vs MCB<\/a><\/li>\n<li>c\u00e1c <a href=\"https:\/\/test.viox.com\/vi\/how-to-select-an-mccb-for-a-panel\/\">h\u01b0\u1edbng d\u1eabn ch\u1ecdn MCCB c\u1ee7a ch\u00fang t\u00f4i<\/a><\/li>\n<li>c\u00e1c <a href=\"https:\/\/test.viox.com\/vi\/mccb-full-form-molded-case-circuit-breaker\/\">Trang \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 MCCB<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5915.77px; left: 54.0078px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5915.77px; left: 54.0078px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 79.8281px; left: 54.0078px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 79.8281px; left: 54.0078px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 79.8281px; left: 54.0078px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer A heavy-duty molded case circuit breaker (MCCB) safely installed within a low-voltage industrial distribution panel, ready to protect distribution equipment. A molded case circuit breaker (MCCB) is a low-voltage circuit breaker used to protect feeders, larger branch circuits, machinery supplies, and distribution equipment against overloads and short circuits. Compared with a smaller MCB, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7121,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-7120","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/7120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=7120"}],"version-history":[{"count":4,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/7120\/revisions"}],"predecessor-version":[{"id":23291,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/7120\/revisions\/23291"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/7121"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=7120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=7120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=7120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}