{"id":2798,"date":"2026-06-17T12:17:38","date_gmt":"2026-06-17T12:17:38","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=2798"},"modified":"2026-06-17T12:18:46","modified_gmt":"2026-06-17T12:18:46","slug":"what-is-mccb-and-mcb","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/what-is-mccb-and-mcb\/","title":{"rendered":"MCCB l\u00e0 g\u00ec v\u00e0 MCB?"},"content":{"rendered":"

T\u1ea5t c\u1ea3 c\u00e1c b\u1ea3ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y trong nh\u00e0, v\u0103n ph\u00f2ng, nh\u00e0 m\u00e1y v\u00e0 h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi \u0111\u1ec1u \u0111i k\u00e8m v\u1edbi c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 d\u00f2ng. Nh\u1eefng thi\u1ebft b\u1ecb ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 MCBs (C\u1ea7u dao mini)<\/strong> v\u00e0 MCCBs (C\u1ea7u dao kh\u1ed1i \u0111\u00fac)<\/strong>. C\u1ea3 hai lo\u1ea1i c\u1ea7u dao \u0111\u1ec1u c\u00f3 v\u1ebb gi\u1ed1ng nhau t\u1eeb xa. Ch\u00fang \u0111\u1ec1u c\u00f3 tay c\u1ea7m b\u1eadt\/t\u1eaft v\u00e0 s\u1ebd ng\u1eaft khi c\u00f3 qu\u00e1 nhi\u1ec1u d\u00f2ng \u0111i\u1ec7n ch\u1ea3y qua ch\u00fang. Nh\u1ea7m l\u1eabn MCB v\u1edbi MCCB c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ed9t h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 t\u1ed5ng th\u1ec3 ng\u1eaft \u0111i\u1ec7n trong m\u1ed7i l\u1ea7n kh\u1edfi \u0111\u1ed9ng ho\u1eb7c kh\u00f4ng x\u00f3a \u0111\u01b0\u1ee3c l\u1ed7i ng\u1eafn m\u1ea1ch; m\u1ed9t v\u00ed d\u1ee5 v\u1ec1 \u0111i\u1ec1u n\u00e0y l\u00e0 kinh nghi\u1ec7m c\u1ee7a m\u1ed9t th\u1ee3 \u0111i\u1ec7n b\u1ea3o tr\u00ec v\u1edbi m\u1ed9t MCB 63A b\u1ea3o v\u1ec7 m\u1ed9t MCCB trong m\u1ed9t m\u1ea1ch \u0111\u1ed9ng c\u01a1. MCB \u0111\u00e3 ng\u1eaft \u0111i\u1ec7n do d\u00f2ng kh\u1edfi \u0111\u1ed9ng ba l\u1ea7n m\u1ed9t tu\u1ea7n cho \u0111\u1ebfn khi MCB h\u00e0n ch\u1eb7t c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3, v\u00e0 khi l\u1ed7i x\u1ea3y ra, n\u00f3 \u0111\u00e3 l\u00e0m h\u1ecfng m\u1ed9t n\u1eeda b\u1ea3ng \u0111i\u1ec7n. R\u00f5 r\u00e0ng r\u1eb1ng MCB v\u00e0 MCCB th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng kh\u00e1c nhau trong m\u1ed9t h\u1ec7 th\u1ed1ng \u0111i\u1ec7n; nh\u1eefng ng\u01b0\u1eddi ch\u1ec9 \u0111\u1ecbnh, l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec b\u1ea3o v\u1ec7 m\u1ea1ch \u0111i\u1ec7n c\u1ea7n hi\u1ec3u \u0111i\u1ec1u g\u00ec ph\u00e2n bi\u1ec7t hai thi\u1ebft b\u1ecb n\u00e0y.<\/p>\n

\"MCB<\/p>\n

MCB l\u00e0 g\u00ec?<\/h2>\n

MCB l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Miniature Circuit Breaker. MCB l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb nh\u1ecf cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 d\u00f2ng trong c\u00e1c l\u1eafp \u0111\u1eb7t \u0111i\u1ec7n \u00e1p th\u1ea5p, c\u1ea3 trong d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i nh\u1eb9, c\u0169ng nh\u01b0 hai d\u1ea1ng qu\u00e1 d\u00f2ng (qu\u00e1 t\u1ea3i - khi d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng mang d\u00f2ng c\u1ee7a m\u1ea1ch trong m\u1ed9t kho\u1ea3ng th\u1eddi gian d\u00e0i, v\u00ed d\u1ee5, khi qu\u00e1 nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng t\u1eeb m\u1ed9t m\u1ea1ch - v\u00e0 ng\u1eafn m\u1ea1ch; m\u1ed9t t\u00ecnh tr\u1ea1ng khi c\u00f3 m\u1ed9t ng\u1eafn m\u1ea1ch do s\u1ef1 c\u1ed1 ho\u1eb7c h\u01b0 h\u1ecfng (\u0111\u1ebfn) d\u00e2y \u0111i\u1ec7n). MCB s\u1ebd ng\u1eaft khi c\u00f3 t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i; khi m\u1ed9t qu\u00e1 t\u1ea3i x\u1ea3y ra, ph\u1ea7n t\u1eed bimetal c\u1ee7a MCB s\u1ebd n\u00f3ng l\u00ean\/u\u1ed1n cong v\u00e0 do \u0111\u00f3 gi\u1ea3i ph\u00f3ng ch\u1ed1t k\u1ebft n\u1ed1i c\u1ea7u dao \u0111\u1ec3 m\u1ea1ch \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i kh\u1ecfi c\u00e1c m\u1ea1ch kh\u00e1c. MCB c\u0169ng c\u00f3 th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c \u0111i\u1ec1u ki\u1ec7n ng\u1eafn m\u1ea1ch v\u00e0 ng\u1eaft m\u1ea1ch khi ph\u1ea7n t\u1eed v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a n\u00f3 (x\u1ea3 d\u00f2ng \u0111i\u1ec7n v\u1edbi t\u1ed1c \u0111\u1ed9 r\u1ea5t cao). C\u00e1c ph\u1ea7n t\u1eed bimetal b\u00ean trong c\u01a1 ch\u1ebf ng\u1eaft c\u1ee7a MCB s\u1eed d\u1ee5ng c\u1ea3 nhi\u1ec7t v\u00e0 t\u1eeb tr\u01b0\u1eddng \u0111\u1ec3 gi\u00fap MCB ng\u1eaft, b\u1ea5t k\u1ef3 \u0111i\u1ec1u n\u00e0o trong s\u1ed1 \u0111\u00f3 c\u00f3 th\u1ec3 x\u1ea3y ra tr\u01b0\u1edbc khi ph\u1ea7n t\u1eed bimetal c\u00f3 th\u1ec3 tr\u1edf v\u1ec1 v\u1ecb tr\u00ed ban \u0111\u1ea7u c\u1ee7a n\u00f3 (b\u1ecb u\u1ed1n cong\/u\u1ed1n cong l\u1ea1i).<\/p>\n

MCB cho c\u00e1c \u1ee9ng d\u1ee5ng h\u1ed9 gia \u0111\u00ecnh \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n li\u00ean quan, ch\u1eb3ng h\u1ea1n nh\u01b0 IEC 60898. C\u00e1c ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh ba \u0111\u01b0\u1eddng cong ng\u1eaft kh\u00e1c nhau c\u00f3 s\u1eb5n cho c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t: B, C v\u00e0 D. M\u1ed7i \u0111\u01b0\u1eddng cong ch\u1ec9 ra t\u1ed1c \u0111\u1ed9 m\u00e0 nam ch\u00e2m s\u1ebd ph\u1ea3n \u1ee9ng v\u1edbi t\u00ecnh tr\u1ea1ng qu\u00e1 d\u00f2ng t\u01b0\u01a1ng \u1ee9ng v\u1edbi d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3. V\u00ed d\u1ee5, m\u1ed9t MCB \u0111\u01b0\u1eddng cong B s\u1ebd ng\u1eaft \u1edf kho\u1ea3ng 3-5 l\u1ea7n d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3. Nh\u1eefng l\u1ea7n ng\u1eaft n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng s\u01b0\u1edfi \u1ea5m v\u00e0 chi\u1ebfu s\u00e1ng (t\u1ee9c l\u00e0, t\u1ea3i \u0111i\u1ec7n tr\u1edf). M\u1ed9t MCB \u0111\u01b0\u1eddng cong C s\u1ebd ng\u1eaft \u1edf kho\u1ea3ng 5-10 l\u1ea7n d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3 v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c m\u1ea1ch nh\u00e1nh chung v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1ed9ng c\u01a1 nh\u1ecf h\u01a1n. Cu\u1ed1i c\u00f9ng, m\u1ed9t MCB \u0111\u01b0\u1eddng cong D s\u1ebd ng\u1eaft \u1edf kho\u1ea3ng 10-20 l\u1ea7n d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3 v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng r\u1ea5t cao nh\u01b0 m\u00e1y bi\u1ebfn \u00e1p l\u1edbn ho\u1eb7c m\u00e1y X-quang.<\/p>\n

\u0110\u1ec3 \u0111\u01b0\u1ee3c tr\u1ee3 gi\u00fap x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng cong v\u00e0 \u0111\u1ecbnh m\u1ee9c n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi m\u1ed9t t\u1ea3i c\u1ee5 th\u1ec3, b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 k\u00edch th\u01b0\u1edbc c\u1ea7u dao b\u1ea1n c\u1ea7n<\/a> h\u01b0\u1edbng d\u1eabn c\u00e1c ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ecbnh c\u1ee1 NEC v\u00e0 IEC.<\/p>\n

\"MCCB<\/p>\n

MCCB l\u00e0 g\u00ec?<\/h2>\n

MCCB l\u00e0 m\u1ed9t c\u1ea7u dao v\u1edbi v\u1ecf nh\u1ef1a. N\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho c\u00e1c m\u1ea1ch c\u00f3 d\u00f2ng \u0111i\u1ec7n cao v\u00e0\/ho\u1eb7c c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 n\u1eb7ng t\u1eeb c\u00e1c c\u00fa s\u1ed1c \u0111i\u1ec7n. M\u1ed9t MCCB c\u00f3 c\u1ea3 ch\u1ee9c n\u0103ng ng\u1eaft nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t MCB. Tuy nhi\u00ean, \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a c\u1ee7a m\u1ed9t MCCB th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb kho\u1ea3ng 15A \u0111\u1ebfn 2,500A v\u00e0 c\u00f3 th\u1ec3 ng\u1eaft \u0111i\u1ec7n \u1edf m\u1ee9c 100,000A ho\u1eb7c h\u01a1n trong c\u00e1c s\u1ef1 c\u1ed1. Do \u0111\u00f3, m\u1ed9t MCCB l\u00e0 c\u1ea7u dao l\u00fd t\u01b0\u1edfng \u1edf nh\u1eefng v\u1ecb tr\u00ed nh\u01b0 c\u1eeda v\u00e0o d\u1ecbch v\u1ee5 ch\u00ednh, c\u00e1c m\u1ea1ch c\u1ea5p cho \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00e1c t\u1ea3i \u0111i\u1ec7n l\u1edbn kh\u00e1c, v\u00e0 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i \u0111i\u1ec7n n\u01a1i c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u d\u00f2ng \u0111i\u1ec7n l\u1ed7i hi\u1ec7n di\u1ec7n trong h\u1ec7 th\u1ed1ng.<\/p>\n

MCCB, so v\u1edbi MCB, kh\u00f4ng ch\u1ec9 s\u1edf h\u1eefu m\u1ed9t c\u1ed9t l\u1edbn h\u01a1n. M\u1ed9t t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a MCCB l\u00e0 kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh c\u00e1c c\u00e0i \u0111\u1eb7t c\u1ee7a n\u00f3. C\u00e1c c\u00e0i \u0111\u1eb7t ng\u1eaft c\u1ee7a MCB \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp t\u1ea1i nh\u00e0 m\u00e1y v\u00e0 kh\u00f4ng th\u1ec3 thay \u0111\u1ed5i; tuy nhi\u00ean, ph\u1ea7n l\u1edbn c\u00e1c MCCB cho ph\u00e9p \u0111i\u1ec1u ch\u1ec9nh c\u00e1c c\u00e0i \u0111\u1eb7t ng\u1eaft nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh. V\u1edbi c\u00e1c t\u00f9y ch\u1ecdn \u0111i\u1ec1u ch\u1ec9nh n\u00e0y, vi\u1ec7c b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u00fang c\u00e1ch \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi t\u1ea3i. V\u00ed d\u1ee5, n\u1ebfu c\u00f3 m\u1ed9t d\u00f2ng kh\u1edfi \u0111\u1ed9ng li\u00ean quan \u0111\u1ebfn m\u1ed9t \u0111\u1ed9ng c\u01a1, c\u1ea3m bi\u1ebfn t\u1eeb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ee7 cao \u0111\u1ec3 kh\u00f4ng g\u00e2y ra vi\u1ec7c ng\u1eaft kh\u00f4ng mong mu\u1ed1n nh\u01b0ng v\u1eabn \u0111\u1ee7 th\u1ea5p \u0111\u1ec3 ph\u00e1t hi\u1ec7n m\u1ed9t l\u1ed7i th\u1ef1c s\u1ef1. Do \u0111\u00f3, n\u1ebfu vi\u1ec7c gi\u1ea3m thi\u1ec3u ng\u1eaft kh\u00f4ng mong mu\u1ed1n v\u00e0 ph\u1ed1i h\u1ee3p v\u1edbi c\u00e1c c\u1ea7u dao h\u1ea1 l\u01b0u l\u00e0 r\u1ea5t quan tr\u1ecdng, th\u00ec c\u1ea7n thi\u1ebft cho m\u1ed9t MCCB c\u00f3 nh\u1eefng t\u00ednh n\u0103ng \u0111i\u1ec1u ch\u1ec9nh n\u00e0y. MCCB \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf v\u00e0 s\u1ea3n xu\u1ea5t theo ti\u00eau chu\u1ea9n IEC 60947-2 \u0111\u1ec3 s\u1eed d\u1ee5ng nh\u01b0 thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch c\u00f4ng nghi\u1ec7p. Danh m\u1ee5c MCCB c\u1ee7a HUYU bao g\u1ed3m c\u1ea7u dao v\u1ecf nh\u1ef1a HYM1<\/a>, m\u1ed9t d\u00f2ng s\u1ea3n ph\u1ea9m cung c\u1ea5p kh\u1ea3 n\u0103ng ng\u1eaft \u0111i\u1ec1u ch\u1ec9nh v\u00e0 c\u00f4ng su\u1ea5t ng\u1eaft cao h\u01a1n c\u1ea7n thi\u1ebft cho c\u00e1c m\u1ea1ch c\u1ea5p ch\u00ednh v\u00e0 t\u1ea3i c\u00f4ng nghi\u1ec7p.<\/p>\n

M\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t c\u0169ng cung c\u1ea5p MCCB DC chuy\u00ean d\u1ee5ng cho c\u00e1c \u1ee9ng d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi v\u00e0 l\u01b0u tr\u1eef pin. MCCB DC HUM9NEZ c\u1ee7a HUYU l\u00e0 m\u1ed9t thi\u1ebft k\u1ebf kh\u00f4ng ph\u00e2n c\u1ef1c c\u00f3 \u0111\u1ecbnh m\u1ee9c l\u00ean \u0111\u1ebfn 1200V DC, \u0111\u1eb7c bi\u1ec7t d\u00e0nh cho c\u00e1c m\u1ea3ng PV v\u00e0 h\u1ed9p k\u1ebft h\u1ee3p DC. \u0110\u00e2y l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ri\u00eang bi\u1ec7t v\u1edbi MCCB AC; c\u01a1 ch\u1ebf d\u1eadp h\u1ed3 quang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho h\u1ed3 quang DC k\u00e9o d\u00e0i, v\u00e0 n\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean m\u1ea1ch AC.<\/a> MCCB so v\u1edbi MCB: Nh\u1eefng kh\u00e1c bi\u1ec7t ch\u00ednh trong c\u00e1i nh\u00ecn t\u1ed5ng quan.<\/p>\n

D\u1ea3i d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1eb7c \u0111i\u1ec3m<\/th>\nMCB (M\u00e1y c\u1eaft m\u1ea1ch mini)<\/th>\nMCCB (M\u00e1y c\u1eaft m\u1ea1ch d\u1ea1ng khu\u00f4n)<\/th>\n<\/tr>\n<\/thead>\n
Th\u01b0\u1eddng l\u00e0 0.5A \u0111\u1ebfn 125A<\/span><\/td>\nTh\u01b0\u1eddng l\u00e0 15A \u0111\u1ebfn 2,500A<\/td>\nC\u00f4ng su\u1ea5t ng\u1eaft<\/td>\n<\/tr>\n
3 kA \u0111\u1ebfn 25 kA (th\u01b0\u1eddng l\u00e0 6\u201310 kA)<\/span><\/td>\n10 kA \u0111\u1ebfn 100 kA ho\u1eb7c cao h\u01a1n<\/td>\nC\u00e0i \u0111\u1eb7t ng\u1eaft<\/td>\n<\/tr>\n
C\u1ed1 \u0111\u1ecbnh; kh\u00f4ng th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/span><\/td>\nTh\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh (nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh)<\/td>\nK\u00edch th\u01b0\u1edbc v\u1eadt l\u00fd<\/td>\n<\/tr>\n
Nh\u1ecf g\u1ecdn; g\u1eafn tr\u00ean thanh DIN; th\u01b0\u1eddng 1\u20134 c\u1ef1c m\u1ed7i thi\u1ebft b\u1ecb<\/span><\/td>\nL\u1edbn h\u01a1n; c\u00f3 th\u1ec3 g\u1eafn tr\u00ean thanh DIN ho\u1eb7c g\u1eafn tr\u00ean b\u1ea3ng; 2, 3 ho\u1eb7c 4 c\u1ef1c<\/td>\n\u1ee8ng d\u1ee5ng ph\u1ed5 bi\u1ebfn<\/td>\n<\/tr>\n
C\u00e1c m\u1ea1ch cu\u1ed1i trong nh\u00e0 v\u00e0 c\u00e1c t\u00f2a nh\u00e0 th\u01b0\u01a1ng m\u1ea1i: chi\u1ebfu s\u00e1ng, \u1ed5 c\u1eafm, thi\u1ebft b\u1ecb nh\u1ecf<\/span><\/td>\nC\u00e1c m\u1ea1ch c\u1ea5p ch\u00ednh, m\u1ea1ch \u0111\u1ed9ng c\u01a1, thi\u1ebft b\u1ecb l\u1edbn, ph\u00e2n ph\u1ed1i c\u00f4ng nghi\u1ec7p, c\u1eeda v\u00e0o d\u1ecbch v\u1ee5<\/td>\nIEC 60898, UL 1077<\/td>\n<\/tr>\n
Ti\u00eau chu\u1ea9n<\/span><\/td>\nIEC 60947\u20112, UL 489<\/td>\n$5\u2013$50 t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c v\u00e0 c\u1ef1c<\/td>\n<\/tr>\n
Chi ph\u00ed (kho\u1ea3ng, m\u1ed7i \u0111\u01a1n v\u1ecb)<\/span><\/td>\n$30\u2013$500+ t\u00f9y thu\u1ed9c v\u00e0o \u0111\u1ecbnh m\u1ee9c, c\u1ef1c v\u00e0 c\u00f4ng su\u1ea5t ng\u1eaft<\/td>\nN\u01a1i m\u1ed7i c\u1ea7u dao thu\u1ed9c v\u1ec1: C\u00e1c k\u1ecbch b\u1ea3n \u1ee9ng d\u1ee5ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\"N\u01a1i<\/p>\n

N\u01a1i M\u1ed7i B\u1ed9 Ng\u1eaft Thu\u1ed9c V\u1ec1: C\u00e1c T\u00ecnh Hu\u1ed1ng \u1ee8ng D\u1ee5ng<\/h2>\n

S\u1ef1 l\u1ef1a ch\u1ecdn gi\u1eefa B\u1ed9 ng\u1eaft m\u1ea1ch Miniature (MCB) ho\u1eb7c B\u1ed9 ng\u1eaft m\u1ea1ch Molded Case (MCCB) kh\u00f4ng ch\u1ec9 d\u1ef1a tr\u00ean s\u1edf th\u00edch c\u00e1 nh\u00e2n. Thay v\u00e0o \u0111\u00f3, s\u1ef1 l\u1ef1a ch\u1ecdn s\u1ebd ph\u1ee5 thu\u1ed9c v\u00e0o y\u00eau c\u1ea7u c\u1ee7a m\u1ea1ch \u0111i\u1ec7n.<\/p>\n