{"id":2708,"date":"2026-06-04T17:40:30","date_gmt":"2026-06-04T17:40:30","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=2708"},"modified":"2026-06-04T17:40:32","modified_gmt":"2026-06-04T17:40:32","slug":"motor-circuit-protector-vs-circuit-breaker","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/motor-circuit-protector-vs-circuit-breaker\/","title":{"rendered":"B\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 so v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch"},"content":{"rendered":"

Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi m\u1ed9t \u0111\u1ed9ng c\u01a1 \u0111ang trong t\u1ea3i l\u00e0 r\u1ea5t quan tr\u1ecdng, v\u00ec s\u1ef1 l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb s\u1ebd ph\u00e2n bi\u1ec7t gi\u1eefa vi\u1ec7c ng\u1eaft \u0111i\u1ec7n g\u00e2y phi\u1ec1n to\u00e1i (d\u1eebng s\u1ea3n xu\u1ea5t) v\u00e0 m\u1ed9t thi\u1ebft b\u1ecb kh\u00f4ng \u0111\u01b0\u1ee3c ch\u00fa \u00fd cho ph\u00e9p \u0111\u1ed9ng c\u01a1 b\u1ecb ch\u00e1y. M\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi m\u1ed9t c\u1ea7u dao v\u00ec ch\u00fang \u0111\u00f4i khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau. Tuy nhi\u00ean, nh\u1eefng thi\u1ebft b\u1ecb n\u00e0y r\u1ea5t kh\u00e1c nhau, v\u00ec m\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 (MCP)<\/strong> ch\u1ec9 cung c\u1ea5p b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng k\u1ebft h\u1ee3p v\u1edbi m\u1ed9t r\u01a1 le qu\u00e1 t\u1ea3i; tuy nhi\u00ean, m\u1ed9t c\u1ea7u dao \u0111i\u1ec3n h\u00ecnh nh\u01b0 MCB ho\u1eb7c MCCB th\u01b0\u1eddng k\u1ebft h\u1ee3p c\u1ea3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch trong m\u1ed9t thi\u1ebft b\u1ecb, nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o \u0111\u00e2y c\u0169ng l\u00e0 thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p cho t\u1ea3i \u0111\u1ed9ng c\u01a1 tr\u1eeb khi \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t nh\u01b0 v\u1eady. Th\u00f4ng tin n\u00e0y gi\u1ea3i th\u00edch s\u1ef1 kh\u00e1c bi\u1ec7t, \u1ee9ng d\u1ee5ng cho m\u1ed7i lo\u1ea1i v\u00e0 c\u00e1ch tr\u00e1nh nh\u1eefng sai l\u1ea7m ph\u1ed5 bi\u1ebfn nh\u1ea5t li\u00ean quan \u0111\u1ebfn thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1.<\/p>\n

B\u1ed9 B\u1ea3o V\u1ec7 M\u1ea1ch \u0110\u1ed9ng C\u01a1 L\u00e0 G\u00ec?<\/h2>\n

M\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 (MCP), ho\u1eb7c b\u1ed9 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch \u0111\u1ed9ng c\u01a1, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng b\u1ea3o v\u1ec7 m\u1ed9t m\u1ea1ch nh\u00e1nh cung c\u1ea5p \u0111i\u1ec7n cho m\u1ed9t \u0111\u1ed9ng c\u01a1 kh\u1ecfi ng\u1eafn m\u1ea1ch. MCP kh\u00f4ng cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i cho \u0111\u1ed9ng c\u01a1; \u0111i\u1ec1u \u0111\u00f3 \u0111\u01b0\u1ee3c cung c\u1ea5p b\u1edfi r\u01a1 le qu\u00e1 t\u1ea3i ho\u00e0n th\u00e0nh b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 k\u1ebft h\u1ee3p c\u00f9ng v\u1edbi r\u01a1 le t\u1eeb t\u00ednh v\u00e0 MCP.<\/p>\n

MCP, th\u01b0\u1eddng \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y d\u01b0\u1edbi UL 508 cho Thi\u1ebft B\u1ecb \u0110i\u1ec1u Khi\u1ec3n C\u00f4ng Nghi\u1ec7p, v\u00e0 nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 MCP c\u1ee7a h\u1ecd \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea k\u00e9p v\u1edbi UL 489 nh\u01b0 c\u1ea7u dao v\u1ecf \u0111\u00fac \u0111\u1ec3 s\u1eed d\u1ee5ng l\u00e0m b\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh, c\u00f3 c\u00e1c c\u00e0i \u0111\u1eb7t ng\u1eaft t\u1ee9c th\u1eddi (ho\u1eb7c t\u1eeb t\u00ednh) c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t gi\u1eefa ba v\u00e0 m\u01b0\u1eddi ba l\u1ea7n d\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 (FLA) cho \u0111\u1ed9ng c\u01a1. Nh\u1eefng \u0111i\u1ec3m ng\u1eaft n\u00e0y cho ph\u00e9p MCP v\u01b0\u1ee3t qua c\u00e1c d\u00f2ng kh\u1edfi \u0111\u1ed9ng l\u1edbn trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1 m\u00e0 kh\u00f4ng g\u00e2y ng\u1eaft \u0111i\u1ec7n phi\u1ec1n to\u00e1i cho MCP trong khi cho ph\u00e9p MCP nhanh ch\u00f3ng x\u00f3a m\u1ed9t ng\u1eafn m\u1ea1ch th\u1ef1c s\u1ef1. S\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e0i \u0111\u1eb7t ng\u1eaft t\u01b0\u01a1ng \u0111\u1ed1i cao tr\u00ean MCP v\u00e0 ch\u1ee9c n\u0103ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi r\u01a1 le qu\u00e1 t\u1ea3i cho ph\u00e9p MCP kh\u00f4ng b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 kh\u1ecfi qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i.<\/p>\n

\"B\u1ed9<\/p>\n

C\u1ea7u Dao L\u00e0 G\u00ec?<\/h2>\n

M\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i qu\u00e1 t\u1ea3i \u0111i\u1ec7n ho\u1eb7c ng\u1eafn m\u1ea1ch \u0111\u01b0\u1ee3c g\u1ecdi chung l\u00e0 c\u1ea7u dao. C\u1ea7u dao mini (MCB)<\/a> v\u00e0 c\u1ea7u dao v\u1ecf \u0111\u00fac (MCCB)<\/a> l\u00e0 hai lo\u1ea1i c\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p ch\u00ednh. C\u00e1c MCB nhi\u1ec7t t\u1eeb ti\u00eau chu\u1ea9n c\u00f3 m\u1ed9t d\u1ea3i bimetal cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i; ch\u00fang c\u0169ng ch\u1ee9a m\u1ed9t cu\u1ed9n \u0111i\u1ec7n t\u1eeb cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng ng\u1eafn m\u1ea1ch. M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a MCB trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng v\u00e0 h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng th\u01b0\u01a1ng m\u1ea1i nh\u1eb9 l\u00e0 cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 d\u00f2ng trong d\u00e2y d\u1eabn v\u00e0 d\u00e2y cu\u1ed1i m\u1ea1ch. N\u00f3i chung, c\u00e1c MCB ti\u00eau chu\u1ea9n c\u00f3 m\u1ed9t c\u00e0i \u0111\u1eb7t nhi\u1ec7t \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 d\u00f2ng do t\u1ea3i chi\u1ebfu s\u00e1ng, \u1ed5 c\u1eafm v\u00e0 b\u00ecnh n\u01b0\u1edbc n\u00f3ng, v\u00e0 kh\u00f4ng ph\u1ea3i ch\u1ed1ng l\u1ea1i d\u00f2ng \u0111i\u1ec7n l\u1edbn nh\u01b0ng ch\u1ec9 trong th\u1eddi gian r\u1ea5t ng\u1eafn khi kh\u1edfi \u0111\u1ed9ng m\u1ed9t \u0111\u1ed9ng c\u01a1. \u0110\u1ec3 c\u00f3 c\u00e1i nh\u00ecn t\u1ed5ng quan v\u1ec1 c\u00e1ch c\u00e1c c\u1ea7u dao ho\u1ea1t \u0111\u1ed9ng nh\u01b0 l\u00e0 h\u00e0ng r\u00e0o \u0111\u1ea7u ti\u00ean trong b\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n n\u00e0o, s\u1ef1 so s\u00e1nh c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 c\u1ea7u dao so v\u1edbi b\u1ed9 b\u1ea3o v\u1ec7 qu\u00e1 \u00e1p<\/a> gi\u1ea3i th\u00edch n\u01a1i m\u00e0 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng k\u1ebft th\u00fac v\u00e0 b\u1ea3o v\u1ec7 qu\u00e1 \u00e1p b\u1eaft \u0111\u1ea7u.<\/p>\n

\"MCB\"<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh trong nh\u00e1y m\u1eaft<\/h2>\n\n\n\n\n\n\n\n\n\n\n
T\u00ednh N\u0103ng<\/th>\nB\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 (MCP)<\/th>\nC\u1ea7u dao \u0111i\u1ec7n ti\u00eau chu\u1ea9n (MCB\/MCCB)<\/th>\n<\/tr>\n<\/thead>\n
B\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i<\/strong><\/td>\nKh\u00f4ng (c\u1ea7n r\u01a1 le qu\u00e1 t\u1ea3i ri\u00eang bi\u1ec7t)<\/td>\nC\u00f3 (c\u1eaft nhi\u1ec7t trong MCB; c\u1eaft nhi\u1ec7t ho\u1eb7c \u0111i\u1ec7n t\u1eed trong MCCB)<\/td>\n<\/tr>\n
B\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch<\/strong><\/td>\nC\u00f3, ch\u1ec9 t\u1eeb t\u00ednh \u0111i\u1ec1u ch\u1ec9nh<\/td>\nC\u00f3, th\u01b0\u1eddng l\u00e0 t\u1eeb t\u00ednh c\u1ed1 \u0111\u1ecbnh ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh<\/td>\n<\/tr>\n
C\u00e0i \u0111\u1eb7t c\u1eaft<\/strong><\/td>\nCh\u1ec9 t\u1eeb t\u00ednh cao (3\u201313\u00d7 FLA)<\/td>\nK\u1ebft h\u1ee3p c\u1eaft nhi\u1ec7t (1.05\u20131.3\u00d7 In) v\u00e0 t\u1eeb t\u00ednh (5\u201310\u00d7 In \u0111i\u1ec3n h\u00ecnh)<\/td>\n<\/tr>\n
M\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng<\/strong><\/td>\nB\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch m\u1ea1ch nh\u00e1nh \u0111\u1ed9ng c\u01a1, k\u1ebft h\u1ee3p v\u1edbi r\u01a1 le qu\u00e1 t\u1ea3i<\/td>\nB\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh chung cho d\u00e2y d\u1eabn, thi\u1ebft b\u1ecb v\u00e0 \u0111\u00e8n<\/td>\n<\/tr>\n
Ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng<\/strong><\/td>\nUL 508 (ki\u1ec3m so\u00e1t c\u00f4ng nghi\u1ec7p), ho\u1eb7c UL 489 n\u1ebfu \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea k\u00e9p<\/td>\nUL 489 (MCCB), UL 1077 (b\u1ed5 sung), IEC 60898 (MCB)<\/td>\n<\/tr>\n
N\u00f3 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 m\u1ed9t \u0111\u1ed9ng c\u01a1 ri\u00eang l\u1ebb kh\u00f4ng?<\/strong><\/td>\nKh\u00f4ng \u2014 ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a b\u1ed9 kh\u1edfi \u0111\u1ed9ng k\u1ebft h\u1ee3p<\/td>\nCh\u1ec9 n\u1ebfu c\u1ee5 th\u1ec3 l\u00e0 c\u1ea7u dao b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 (MPCB) ho\u1eb7c MCCB c\u00f3 \u0111\u1ecbnh m\u1ee9c ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

T\u1ea1i sao c\u1ea7u dao \u0111i\u1ec7n ti\u00eau chu\u1ea9n th\u01b0\u1eddng kh\u00f4ng b\u1ea3o v\u1ec7 \u0111\u01b0\u1ee3c m\u1ed9t \u0111\u1ed9ng c\u01a1<\/h2>\n

H\u00e3y xem x\u00e9t m\u1ed9t \u0111\u1ed9ng c\u01a1 10 m\u00e3 l\u1ef1c c\u00f3 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 l\u00e0 28 ampe. N\u1ebfu \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c 30 ampe, b\u1ea1n c\u00f3 th\u1ec3 ngh\u0129 r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t c\u1ea7u dao 30 ampe ti\u00eau chu\u1ea9n l\u00e0 m\u1ed9t \u00fd t\u01b0\u1edfng t\u1ed1t, nh\u01b0ng th\u1ef1c t\u1ebf l\u00e0 \u0111\u1ed9ng c\u01a1 n\u00e0y c\u00f3 th\u1ec3 k\u00e9o t\u1eeb 6 \u0111\u1ebfn 8 l\u1ea7n d\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a n\u00f3 (h\u01a1n 200 ampe) trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng trong m\u1ed9t kho\u1ea3nh kh\u1eafc v\u00e0 b\u1ed9 ng\u1eaft t\u1eeb t\u00ednh c\u1ee7a c\u1ea7u dao 30 ampe ti\u00eau chu\u1ea9n th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 5 \u0111\u1ebfn 10 l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (150 \u0111\u1ebfn 300 ampe), v\u00ec v\u1eady d\u00f2ng kh\u1edfi \u0111\u1ed9ng c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng n\u1eb1m trong ph\u1ea1m vi ng\u1eaft c\u1ee7a c\u1ea7u dao, khi\u1ebfn c\u1ea7u dao ng\u1eaft m\u1ed7i khi \u0111\u1ed9ng c\u01a1 kh\u1edfi \u0111\u1ed9ng. N\u1ebfu sau nhi\u1ec1u l\u1ea7n ng\u1eaft kh\u00f4ng mong mu\u1ed1n, th\u1ee3 \u0111i\u1ec7n t\u0103ng k\u00edch th\u01b0\u1edbc c\u1ea7u dao \u0111\u1ec3 c\u1ed1 g\u1eafng ng\u0103n ch\u1eb7n vi\u1ec7c ng\u1eaft kh\u00f4ng mong mu\u1ed1n x\u1ea3y ra l\u1ea7n n\u1eefa, th\u00ec c\u00e1c d\u00e2y d\u1eabn c\u00f3 th\u1ec3 gi\u1edd \u0111\u00e2y kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi qu\u00e1 t\u1ea3i v\u00e0 t\u1ea1o ra nguy c\u01a1 ch\u00e1y n\u1ed5. Ngay c\u1ea3 khi c\u1ea7u dao kh\u00f4ng ng\u1eaft trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng, ph\u1ea7n nhi\u1ec7t c\u1ee7a c\u1ea7u dao kh\u00f4ng \u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh theo \u0111\u01b0\u1eddng cong h\u01b0 h\u1ea1i c\u1ee5 th\u1ec3 c\u1ee7a \u0111\u1ed9ng c\u01a1, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 qu\u00e1 t\u1ea3i ch\u1eadm c\u00f3 th\u1ec3 kh\u00f4ng ng\u1eaft c\u1ea7u dao cho \u0111\u1ebfn khi \u0111\u1ed9ng c\u01a1 b\u1ecb h\u01b0 h\u1ea1i. Do \u0111\u00f3, m\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 v\u1edbi ng\u1eaft t\u1eeb t\u00ednh \u0111i\u1ec1u ch\u1ec9nh (\u0111\u01b0\u1ee3c \u0111\u1eb7t \u0111\u1ee7 cao \u0111\u1ec3 b\u1ecf qua d\u00f2ng kh\u1edfi \u0111\u1ed9ng nh\u01b0ng \u0111\u1ee7 th\u1ea5p \u0111\u1ec3 ng\u1eaft trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 s\u1ef1 c\u1ed1) v\u00e0 m\u1ed9t r\u01a1 le qu\u00e1 t\u1ea3i \u0111\u01b0\u1ee3c k\u00edch th\u01b0\u1edbc \u0111\u00fang l\u00e0 gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p cho c\u00e1c m\u1ea1ch \u0111\u1ed9ng c\u01a1.<\/p>\n

\"C\u1ea7u<\/p>\n

B\u1ed9 Ng\u1eaft B\u1ea3o V\u1ec7 \u0110\u1ed9ng C\u01a1: M\u1ed9t L\u1ef1a Ch\u1ecdn Th\u1ee9 Ba<\/h2>\n

B\u1ed9 Ng\u1eaft B\u1ea3o V\u1ec7 \u0110\u1ed9ng C\u01a1 (MPCB) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb n\u1eb1m gi\u1eefa B\u1ed9 B\u1ea3o V\u1ec7 M\u1ea1ch \u0110\u1ed9ng C\u01a1 (MCP) v\u00e0 B\u1ed9 Ng\u1eaft M\u1ea1ch H\u00ecnh Ch\u00f3p (MCB). MPCB k\u1ebft h\u1ee3p c\u1ea3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i nhi\u1ec7t \u0111i\u1ec1u ch\u1ec9nh (ho\u1eb7c bimetallic ho\u1eb7c \u0111i\u1ec7n t\u1eed) v\u00e0 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch t\u1eeb t\u00ednh \u0111i\u1ec1u ch\u1ec9nh trong m\u1ed9t thi\u1ebft b\u1ecb. M\u1ee5c \u0111\u00edch c\u1ee7a MPCB l\u00e0 b\u1ea3o v\u1ec7 m\u1ed9t \u0111\u1ed9ng c\u01a1 kh\u1ecfi c\u1ea3 qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch, trong khi k\u00edch th\u01b0\u1edbc c\u1ee7a MPCB \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u00f2ng \u0111i\u1ec7n t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a \u0111\u1ed9ng c\u01a1 v\u00e0 h\u1ec7 s\u1ed1 d\u1ecbch v\u1ee5 c\u1ee7a \u0111\u1ed9ng c\u01a1. T\u1ea1i c\u00e1c th\u1ecb tr\u01b0\u1eddng IEC, MPCB th\u01b0\u1eddng l\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 duy nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. T\u1ea1i B\u1eafc M\u1ef9, MPCB th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn khi \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea UL 489 v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t b\u1ed9 \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 th\u1ee7 c\u00f4ng; tuy nhi\u00ean, th\u1ef1c ti\u1ec5n ph\u1ed5 bi\u1ebfn h\u01a1n v\u1eabn l\u00e0 MCCP, v.v. N\u1ebfu b\u1ea1n \u0111ang \u0111\u00e1nh gi\u00e1 c\u00e1c t\u00f9y ch\u1ecdn b\u1ea3o v\u1ec7 kh\u00e1c nhau cho m\u1ed9t m\u1ea1ch nh\u00e1nh \u0111\u1ed9ng c\u01a1, h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 k\u00edch th\u01b0\u1edbc c\u1ea7u dao b\u1ea1n c\u1ea7n<\/a> gi\u1ea3i th\u00edch c\u00e1c quy t\u1eafc NEC cho vi\u1ec7c k\u00edch th\u01b0\u1edbc c\u00e1c thi\u1ebft b\u1ecb qu\u00e1 d\u00f2ng cho c\u00e1c lo\u1ea1i t\u1ea3i kh\u00e1c nhau, bao g\u1ed3m c\u1ea3 \u0111\u1ed9ng c\u01a1.<\/p>\n

B\u1ed9 B\u1ea3o V\u1ec7 M\u1ea1ch \u0110\u1ed9ng C\u01a1 c\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t B\u1ed9 Ng\u1eaft M\u1ea1ch kh\u00f4ng?<\/h2>\n

Con ng\u01b0\u1eddi th\u01b0\u1eddng m\u1eafc sai l\u1ea7m khi c\u1ed1 g\u1eafng hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ed9t c\u1ea7u dao v\u00e0 m\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 v\u00ec ch\u00fang tr\u00f4ng c\u00f3 v\u1ebb gi\u1ed1ng nhau. c\u00e1c c\u1ea7u dao UL 489<\/a> Trong khi m\u1ed9t s\u1ed1 b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 (MCP) th\u1ef1c s\u1ef1 l\u00e0 c\u00e1c lo\u1ea1i c\u1ea7u dao, kh\u00f4ng ph\u1ea3i t\u1ea5t c\u1ea3 c\u00e1c c\u1ea7u dao \u0111\u1ec1u l\u00e0 MCP.<\/p>\n

C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

M\u1ed9t MCP th\u01b0\u1eddng tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t c\u1ea7u dao v\u1ecf \u0111\u00fac \u2013 n\u00f3 v\u1eeba v\u1eb7n v\u00e0o m\u1ed9t b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n ho\u1eb7c trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 v\u00e0 n\u00f3 c\u00f3 c\u00f9ng lo\u1ea1i c\u00f4ng t\u1eafc b\u1eadt\/t\u1eaft.<\/h3>\n

Tuy nhi\u00ean, c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a m\u1ed9t MCP kh\u00e1c xa so v\u1edbi c\u1ea7u dao; th\u01b0\u1eddng th\u00ec m\u1ed9t MCP kh\u00f4ng c\u00f3 ph\u1ea7n t\u1eed nhi\u1ec7t \u2013 n\u00f3 ch\u1ec9 c\u00f3 m\u1ed9t b\u1ed9 ng\u1eaft t\u1eeb t\u00ednh \u0111i\u1ec1u ch\u1ec9nh, tuy nhi\u00ean n\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn v\u1edbi c\u00e1c x\u1ebfp h\u1ea1ng k\u00e9p b\u1edfi c\u1ea3 UL 508 v\u00e0 UL 489.<\/p>\n

V\u00ec l\u00fd do n\u00e0y, m\u1ed9t MCP \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u \u0111\u1ec3 tr\u1edf th\u00e0nh ph\u01b0\u01a1ng ti\u1ec7n ng\u1eaft k\u1ebft n\u1ed1i v\u00e0 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch t\u1eeb m\u1ed9t m\u1ea1ch \u0111\u1ed9ng c\u01a1 khi n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi m\u1ed9t r\u01a1 le qu\u00e1 t\u1ea3i.<\/h3>\n

\u0110\u1ec3 t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n v\u1ec1 c\u00e1c ti\u00eau chu\u1ea9n UL \u0111i\u1ec1u ch\u1ec9nh c\u00e1c thi\u1ebft b\u1ecb n\u00e0y, b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1.<\/p>\n

gi\u1ea3i th\u00edch c\u00e1c th\u1eed nghi\u1ec7m v\u00e0 ch\u1ee9ng nh\u1eadn ph\u00e2n bi\u1ec7t m\u1ed9t c\u1ea7u dao \u0111\u00e3 \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea v\u1edbi m\u1ed9t th\u00e0nh ph\u1ea7n kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea.<\/h3>\n

M\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1 c\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t c\u1ea7u dao kh\u00f4ng?.<\/p>\n

M\u1ed9t B\u1ed9 B\u1ea3o V\u1ec7 M\u1ea1ch \u0110\u1ed9ng C\u01a1 (MCP) ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t c\u1ea7u dao v\u1ecf \u0111\u00fac ti\u00eau chu\u1ea9n, nh\u01b0ng n\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 cung c\u1ea5p b\u1ea3o v\u1ec7 t\u1eeb t\u00ednh ch\u1ed1ng l\u1ea1i ng\u1eafn m\u1ea1ch khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi m\u1ed9t r\u01a1 le qu\u00e1 t\u1ea3i cho b\u1ea3o v\u1ec7 nhi\u1ec7t.<\/h3>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB v\u00e0 MPCB \u2013 MCB, hay B\u1ed9 ng\u1eaft m\u1ea1ch mini, l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u00e2y \u0111i\u1ec7n v\u00e0 t\u1ea3i ti\u00eau chu\u1ea9n v\u00e0 c\u00f3 c\u00e0i \u0111\u1eb7t ng\u1eaft nhi\u1ec7t c\u1ed1 \u0111\u1ecbnh c\u0169ng nh\u01b0 c\u00e0i \u0111\u1eb7t ng\u1eaft t\u1eeb c\u1ed1 \u0111\u1ecbnh. MPCB, hay B\u1ed9 ng\u1eaft m\u1ea1ch b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ed9c quy\u1ec1n \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 v\u00e0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i nhi\u1ec7t c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t theo d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a \u0111\u1ed9ng c\u01a1 c\u0169ng nh\u01b0 c\u00e0i \u0111\u1eb7t ng\u1eaft t\u1eeb ng\u1eafn m\u1ea1ch c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c m\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u00e0i \u0111\u1eb7t \u0111\u1ee7 cao \u0111\u1ec3 ng\u0103n ng\u1eeba vi\u1ec7c ng\u1eaft khi kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1. Do \u0111\u00f3, MPCB c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 duy nh\u1ea5t cho m\u1ed9t \u0111\u1ed9ng c\u01a1 trong khi MCB th\u00ec kh\u00f4ng th\u1ec3.<\/p>\n

L\u1ef1a ch\u1ecdn gi\u1eefa m\u1ed9t b\u1ed9 b\u1ea3o v\u1ec7 m\u1ea1ch \u0111\u1ed9ng c\u01a1<\/strong> v\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n c\u1ea7u dao<\/strong> ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c hi\u1ec3u m\u1ea1ch nh\u00e1nh \u0111\u1ed9ng c\u01a1: s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch, b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n. MCP \u0111\u1ea3m nh\u1eadn vai tr\u00f2 b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch trong m\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ed1i h\u1ee3p bao g\u1ed3m contactor v\u00e0 r\u01a1 le qu\u00e1 t\u1ea3i. M\u1ed9t c\u1ea7u dao ti\u00eau chu\u1ea9n c\u1ed1 g\u1eafng th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 trong m\u1ed9t thi\u1ebft b\u1ecb v\u00e0 th\u01b0\u1eddng kh\u00f4ng \u0111\u00e1p \u1ee9ng \u0111\u01b0\u1ee3c khi \u0111\u1ed1i m\u1eb7t v\u1edbi \u0111\u1eb7c \u0111i\u1ec3m d\u00f2ng \u0111i\u1ec7n \u0111\u1eb7c th\u00f9 c\u1ee7a \u0111\u1ed9ng c\u01a1 kh\u1edfi \u0111\u1ed9ng. T\u1ea1i HUYU, ch\u00fang t\u00f4i cung c\u1ea5p \u0111\u1ea7y \u0111\u1ee7 c\u00e1c lo\u1ea1i b\u1ea3o v\u1ec7 m\u1ea1ch \u2014 t\u1eeb MCB v\u00e0 MCCB \u0111a n\u0103ng \u0111\u1ebfn c\u00e1c c\u1ea7u dao chuy\u00ean d\u1ee5ng \u0111\u00e1p \u1ee9ng UL 489 v\u00e0 h\u01a1n th\u1ebf n\u1eefa \u2014 \u0111\u1ec3 d\u00f9 b\u1ea1n \u0111ang b\u1ea3o v\u1ec7 b\u1ea3ng \u0111\u00e8n hay t\u1ea3i \u0111\u1ed9ng c\u01a1 quan tr\u1ecdng, b\u1ea1n \u0111\u1ec1u c\u00f3 thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p cho c\u00f4ng vi\u1ec7c ph\u00f9 h\u1ee3p.<\/p>","protected":false},"excerpt":{"rendered":"

The protective device utilized when a motor is in the load is critical, as the choice of device will distinguish between a nuisance trip (haltered production) and an unnoticed device that allows a motor to burn out. A motor circuit protector may be confused with a circuit breaker because they are sometimes used interchangeably. However, […]<\/p>\n","protected":false},"author":1,"featured_media":2709,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2708","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\/2708","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=2708"}],"version-history":[{"count":1,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/2708\/revisions"}],"predecessor-version":[{"id":2712,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/2708\/revisions\/2712"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media\/2709"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media?parent=2708"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/categories?post=2708"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/tags?post=2708"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}