{"id":4235,"date":"2026-09-24T00:00:00","date_gmt":"2026-09-24T00:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/?p=4235"},"modified":"2026-09-18T08:04:48","modified_gmt":"2026-09-18T08:04:48","slug":"ky-hieu-cua-mcb","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/vi\/blog\/symbol-for-mcb\/","title":{"rendered":"K\u00fd hi\u1ec7u c\u1ee7a MCB"},"content":{"rendered":"

Khi m\u1ed9t vai tr\u00f2 trong d\u1ef1 \u00e1n g\u1eb7p s\u1ef1 c\u1ed1 l\u1ef1a ch\u1ecdn, th\u1ea5t b\u1ea1i hi\u1ec3n hi\u1ec7n th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n tr\u01b0\u1edbc khi nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5. Chen, m\u1ed9t k\u1ef9 thu\u1eadt vi\u00ean v\u1ebd thi\u1ebft k\u1ebf \u1edf T\u00f4 Ch\u00e2u, \u0111\u00e3 sao ch\u00e9p bi\u1ec3u t\u01b0\u1ee3ng c\u1ea7u dao t\u1eeb m\u1ed9t d\u1ef1 \u00e1n c\u0169 sang s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i m\u1edbi. K\u00fd hi\u1ec7u n\u00e0y ng\u1ee5 \u00fd m\u1ed9t c\u1ea7u ch\u00ec v\u00e0 b\u1ecf s\u00f3t ch\u00fa th\u00edch v\u1ec1 c\u01a1 ch\u1ebf c\u1eaft chung, khi\u1ebfn nh\u00f3m v\u1eadn h\u00e0nh th\u1eed nghi\u1ec7m b\u1ed1i r\u1ed1i. M\u1ed9t vi\u1ec7c ki\u1ec3m tra k\u00fd hi\u1ec7u nh\u1ecf \u0111\u00e3 ng\u0103n ng\u1eeba \u0111\u01b0\u1ee3c l\u1ed7i \u0111i d\u00e2y l\u1edbn h\u01a1n.<\/p>\n

T\u00f3m t\u1eaft:<\/strong> K\u00fd hi\u1ec7u MCB l\u00e0 m\u1ed9t d\u1ea1ng vi\u1ebft t\u1eaft \u0111\u1ed3 h\u1ecda, kh\u00f4ng ph\u1ea3i l\u00e0 s\u1ef1 thay th\u1ebf cho b\u1ea3ng ti\u1ebfn \u0111\u1ed9. H\u00e3y s\u1eed d\u1ee5ng quy \u01b0\u1edbc v\u1ebd k\u1ef9 thu\u1eadt c\u1ee7a d\u1ef1 \u00e1n, th\u1ec3 hi\u1ec7n s\u1ed1 c\u1ef1c v\u00e0 thao t\u00e1c \u0111\u00f3ng c\u1eaft, \u0111\u1ed3ng th\u1eddi \u0111\u1ed1i chi\u1ebfu ch\u00e9o m\u00e3 thi\u1ebft b\u1ecb, \u0111\u1ecbnh m\u1ee9c v\u00e0 \u0111\u01b0\u1eddng \u0111\u1eb7c t\u00ednh. Ti\u00eau chu\u1ea9n IEC 60617 cung c\u1ea5p c\u00e1c k\u00fd hi\u1ec7u \u0111\u1ed3 h\u1ecda ti\u00eau chu\u1ea9n h\u00f3a, trong khi th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a d\u1ef1 \u00e1n ki\u1ec3m so\u00e1t c\u00e1c chi ti\u1ebft k\u00fd hi\u1ec7u. B\u00e0i vi\u1ebft n\u00e0y gi\u1eef cho quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean b\u1eb1ng ch\u1ee9ng v\u00e0 t\u00e1ch bi\u1ec7t n\u0103ng l\u1ef1c s\u1ea3n ph\u1ea9m kh\u1ecfi tr\u00e1ch nhi\u1ec7m l\u1eafp \u0111\u1eb7t.<\/p>\n

\"Bi\u1ec3u<\/p>\n

Quy \u01b0\u1edbc s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i<\/h2>\n

C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang b\u1eaft \u0111\u1ea7u t\u1eeb ranh gi\u1edbi \u1ee9ng d\u1ee5ng. H\u00e3y x\u00e1c \u0111\u1ecbnh ngu\u1ed3n, t\u1ea3i, d\u00e2y d\u1eabn, m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 v\u00e0 m\u00f4i tr\u01b0\u1eddng v\u1eadn h\u00e0nh tr\u01b0\u1edbc khi so s\u00e1nh c\u00e1c catalogue. M\u1ed9t thi\u1ebft b\u1ecb tr\u00f4ng c\u00f3 v\u1ebb ph\u00f9 h\u1ee3p v\u1ec1 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n v\u1eabn c\u00f3 th\u1ec3 h\u1ecfng v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu h\u1ed3 quang, t\u00ednh ch\u1ecdn l\u1ecdc, nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t. H\u00e3y s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ti\u00eau chu\u1ea9n \u0111i d\u00e2y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0m ng\u00f4n ng\u1eef chung gi\u1eefa thi\u1ebft k\u1ebf, mua s\u1eafm v\u00e0 ch\u1ea1y th\u1eed.<\/p>\n

L\u1eadp t\u00e0i li\u1ec7u v\u1ec1 c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u00e0 ki\u1ec3m tra ch\u00fang t\u1ea1i t\u1ee7 \u0111i\u1ec7n. V\u00ed d\u1ee5, m\u1ed9t nghi\u00ean c\u1ee9u v\u1ec1 b\u1ea3o v\u1ec7 c\u1ea7n n\u00eau r\u00f5 d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch d\u1ef1 ki\u1ebfn, d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng (inrush) d\u1ef1 ki\u1ebfn, kh\u1ea3 n\u0103ng mang d\u00f2ng c\u1ee7a d\u00e2y d\u1eabn v\u00e0 th\u1eddi gian c\u1eaft y\u00eau c\u1ea7u. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u00f3 t\u00ean g\u1ecdi c\u1ee5 th\u1ec3 nh\u01b0 th\u1eed nghi\u1ec7m ti\u00eam d\u00f2ng s\u01a1 c\u1ea5p, th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n ho\u1eb7c nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p s\u1ebd h\u1eefu \u00edch h\u01a1n so v\u1edbi m\u1ed9t tuy\u00ean b\u1ed1 chung chung r\u1eb1ng m\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u1ea1t \u201cc\u1ea5p \u0111\u1ed9 c\u00f4ng nghi\u1ec7p.\u201d<\/p>\n

N\u1ebfu c\u00e2u tr\u1ea3 l\u1eddi thay \u0111\u1ed5i theo th\u1ecb tr\u01b0\u1eddng \u0111\u00edch, h\u1ec7 th\u1ed1ng \u0111i\u1ec7n \u00e1p ho\u1eb7c lo\u1ea1i \u1ee9ng d\u1ee5ng, h\u00e3y n\u00eau gi\u1ea3 \u0111\u1ecbnh \u0111\u00f3 trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn b\u1eb1ng v\u0103n b\u1ea3n tr\u01b0\u1edbc khi ph\u00e1t h\u00e0nh.<\/p>\n

Ch\u1ec9 th\u1ecb B\u1eadt\/T\u1eaft v\u00e0 c\u1ef1c<\/h2>\n

C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang b\u1eaft \u0111\u1ea7u t\u1eeb ranh gi\u1edbi \u1ee9ng d\u1ee5ng. H\u00e3y x\u00e1c \u0111\u1ecbnh ngu\u1ed3n, t\u1ea3i, d\u00e2y d\u1eabn, m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 v\u00e0 m\u00f4i tr\u01b0\u1eddng v\u1eadn h\u00e0nh tr\u01b0\u1edbc khi so s\u00e1nh c\u00e1c catalogue. M\u1ed9t thi\u1ebft b\u1ecb tr\u00f4ng c\u00f3 v\u1ebb ph\u00f9 h\u1ee3p v\u1ec1 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n v\u1eabn c\u00f3 th\u1ec3 h\u1ecfng v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu h\u1ed3 quang, t\u00ednh ch\u1ecdn l\u1ecdc, nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t. H\u00e3y s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ti\u00eau chu\u1ea9n \u0111i d\u00e2y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0m ng\u00f4n ng\u1eef chung gi\u1eefa thi\u1ebft k\u1ebf, mua s\u1eafm v\u00e0 ch\u1ea1y th\u1eed.<\/p>\n

L\u1eadp t\u00e0i li\u1ec7u v\u1ec1 c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u00e0 ki\u1ec3m tra ch\u00fang t\u1ea1i t\u1ee7 \u0111i\u1ec7n. V\u00ed d\u1ee5, m\u1ed9t nghi\u00ean c\u1ee9u v\u1ec1 b\u1ea3o v\u1ec7 c\u1ea7n n\u00eau r\u00f5 d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch d\u1ef1 ki\u1ebfn, d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng (inrush) d\u1ef1 ki\u1ebfn, kh\u1ea3 n\u0103ng mang d\u00f2ng c\u1ee7a d\u00e2y d\u1eabn v\u00e0 th\u1eddi gian c\u1eaft y\u00eau c\u1ea7u. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u00f3 t\u00ean g\u1ecdi c\u1ee5 th\u1ec3 nh\u01b0 th\u1eed nghi\u1ec7m ti\u00eam d\u00f2ng s\u01a1 c\u1ea5p, th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n ho\u1eb7c nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p s\u1ebd h\u1eefu \u00edch h\u01a1n so v\u1edbi m\u1ed9t tuy\u00ean b\u1ed1 chung chung r\u1eb1ng m\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u1ea1t \u201cc\u1ea5p \u0111\u1ed9 c\u00f4ng nghi\u1ec7p.\u201d<\/p>\n

N\u1ebfu c\u00e2u tr\u1ea3 l\u1eddi thay \u0111\u1ed5i theo th\u1ecb tr\u01b0\u1eddng \u0111\u00edch, h\u1ec7 th\u1ed1ng \u0111i\u1ec7n \u00e1p ho\u1eb7c lo\u1ea1i \u1ee9ng d\u1ee5ng, h\u00e3y n\u00eau gi\u1ea3 \u0111\u1ecbnh \u0111\u00f3 trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn b\u1eb1ng v\u0103n b\u1ea3n tr\u01b0\u1edbc khi ph\u00e1t h\u00e0nh.<\/p>\n

Ki\u1ec3m tra v\u00e0 b\u00e0n giao b\u1ea3n v\u1ebd<\/h2>\n

C\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang b\u1eaft \u0111\u1ea7u t\u1eeb ranh gi\u1edbi \u1ee9ng d\u1ee5ng. H\u00e3y x\u00e1c \u0111\u1ecbnh ngu\u1ed3n, t\u1ea3i, d\u00e2y d\u1eabn, m\u1ee9c \u0111\u1ed9 s\u1ef1 c\u1ed1 v\u00e0 m\u00f4i tr\u01b0\u1eddng v\u1eadn h\u00e0nh tr\u01b0\u1edbc khi so s\u00e1nh c\u00e1c catalogue. M\u1ed9t thi\u1ebft b\u1ecb tr\u00f4ng c\u00f3 v\u1ebb ph\u00f9 h\u1ee3p v\u1ec1 \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n v\u1eabn c\u00f3 th\u1ec3 h\u1ecfng v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ecbu h\u1ed3 quang, t\u00ednh ch\u1ecdn l\u1ecdc, nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t. H\u00e3y s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ti\u00eau chu\u1ea9n \u0111i d\u00e2y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng l\u00e0m ng\u00f4n ng\u1eef chung gi\u1eefa thi\u1ebft k\u1ebf, mua s\u1eafm v\u00e0 ch\u1ea1y th\u1eed.<\/p>\n

L\u1eadp t\u00e0i li\u1ec7u v\u1ec1 c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u00e0 ki\u1ec3m tra ch\u00fang t\u1ea1i t\u1ee7 \u0111i\u1ec7n. V\u00ed d\u1ee5, m\u1ed9t nghi\u00ean c\u1ee9u v\u1ec1 b\u1ea3o v\u1ec7 c\u1ea7n n\u00eau r\u00f5 d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch d\u1ef1 ki\u1ebfn, d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng (inrush) d\u1ef1 ki\u1ebfn, kh\u1ea3 n\u0103ng mang d\u00f2ng c\u1ee7a d\u00e2y d\u1eabn v\u00e0 th\u1eddi gian c\u1eaft y\u00eau c\u1ea7u. C\u00e1c ph\u01b0\u01a1ng ph\u00e1p c\u00f3 t\u00ean g\u1ecdi c\u1ee5 th\u1ec3 nh\u01b0 th\u1eed nghi\u1ec7m ti\u00eam d\u00f2ng s\u01a1 c\u1ea5p, th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n ho\u1eb7c nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p s\u1ebd h\u1eefu \u00edch h\u01a1n so v\u1edbi m\u1ed9t tuy\u00ean b\u1ed1 chung chung r\u1eb1ng m\u1ed9t s\u1ea3n ph\u1ea9m \u0111\u1ea1t \u201cc\u1ea5p \u0111\u1ed9 c\u00f4ng nghi\u1ec7p.\u201d<\/p>\n

N\u1ebfu c\u00e2u tr\u1ea3 l\u1eddi thay \u0111\u1ed5i theo th\u1ecb tr\u01b0\u1eddng \u0111\u00edch, h\u1ec7 th\u1ed1ng \u0111i\u1ec7n \u00e1p ho\u1eb7c lo\u1ea1i \u1ee9ng d\u1ee5ng, h\u00e3y n\u00eau gi\u1ea3 \u0111\u1ecbnh \u0111\u00f3 trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn b\u1eb1ng v\u0103n b\u1ea3n tr\u01b0\u1edbc khi ph\u00e1t h\u00e0nh.<\/p>\n

\"K\u00fd<\/p>\n

So s\u00e1nh cho m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u00f3 t\u00ednh b\u1ea3o v\u1ec7<\/h2>\n\n\n\n\n\n\n\n
K\u00edch th\u01b0\u1edbc<\/th>\nL\u1ef1a ch\u1ecdn A<\/th>\nPh\u01b0\u01a1ng \u00e1n B<\/th>\n<\/tr>\n<\/thead>\n
K\u00fd hi\u1ec7u c\u1ea7u dao<\/td>\nCh\u1ee9c n\u0103ng chuy\u1ec3n m\u1ea1ch b\u1ea3o v\u1ec7<\/td>\nPh\u00f9 h\u1ee3p v\u1edbi ti\u00eau chu\u1ea9n IEC 60617 ho\u1eb7c ch\u00fa th\u00edch c\u1ee7a d\u1ef1 \u00e1n<\/td>\n<\/tr>\n
V\u1ebft c\u1ef1c<\/td>\nS\u1ed1 v\u00e0 thao t\u00e1c li\u00ean k\u1ebft<\/td>\nKh\u1edbp v\u1edbi l\u1ecbch tr\u00ecnh thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n
Th\u1ebb v\u00e0 \u0111\u00e1nh gi\u00e1<\/td>\nKh\u1ea3 n\u0103ng truy xu\u1ea5t ngu\u1ed3n g\u1ed1c \u0111\u1ebfn ph\u1ea7n c\u1ee9ng<\/td>\nKi\u1ec3u m\u00e1y, \u0111\u01b0\u1eddng cong v\u00e0 kh\u1ea3 n\u0103ng mang d\u00f2ng \u0111i\u1ec7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c ho\u1ea1t \u0111\u1ed9ng l\u1ef1a ch\u1ecdn v\u00e0 mua s\u1eafm<\/h2>\n
    \n
  1. \u0110\u00f3ng b\u0103ng c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec7n: \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng, s\u1ed1 c\u1ef1c, d\u00f2ng t\u1ea3i, ph\u01b0\u01a1ng ph\u00e1p d\u1eabn \u0111i\u1ec7n, d\u00f2ng s\u1ef1 c\u1ed1 v\u00e0 gi\u1edbi h\u1ea1n nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng.<\/li>\n
  2. Y\u00eau c\u1ea7u d\u1eef li\u1ec7u theo d\u00f2ng s\u1ea3n ph\u1ea9m: phi\u00ean b\u1ea3n ti\u00eau chu\u1ea9n, \u0111\u01b0\u1eddng \u0111\u1eb7c t\u00ednh d\u00f2ng c\u1eaft, kh\u1ea3 n\u0103ng ng\u1eaft, gi\u1edbi h\u1ea1n c\u1ef1c \u0111\u1ea5u d\u00e2y, k\u00edch th\u01b0\u1edbc v\u00e0 b\u1eb1ng ch\u1ee9ng th\u1eed nghi\u1ec7m.<\/li>\n
  3. Xem x\u00e9t vi\u1ec7c ph\u1ed1i h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb th\u01b0\u1ee3ng ngu\u1ed3n v\u00e0 h\u1ea1 ngu\u1ed3n; kh\u00f4ng suy lu\u1eadn t\u00ednh ch\u1ecdn l\u1ecdc t\u1eeb nh\u00e3n hi\u1ec7u ho\u1eb7c k\u00edch th\u01b0\u1edbc khung.<\/li>\n
  4. Ph\u00ea duy\u1ec7t m\u1eabu ho\u1eb7c b\u00e0i vi\u1ebft \u0111\u1ea7u ti\u00ean, ghi l\u1ea1i l\u1ef1c si\u1ebft v\u00e0 c\u00e1c \u0111i\u1ec3m ki\u1ec3m tra, \u0111\u1ed3ng th\u1eddi x\u00e1c \u0111\u1ecbnh ai l\u00e0 ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra ch\u1ea1y th\u1eed.<\/li>\n
  5. L\u1eadp k\u1ebf ho\u1ea1ch ph\u1ee5 t\u00f9ng v\u00e0 qu\u1ea3n l\u00fd thay \u0111\u1ed5i \u0111\u1ec3 vi\u1ec7c thay th\u1ebf sau n\u00e0y kh\u00f4ng l\u00e0m thay \u0111\u1ed5i \u00e2m th\u1ea7m hi\u1ec7u su\u1ea5t an to\u00e0n.<\/li>\n<\/ol>\n

    \u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi mua \u0111ang so s\u00e1nh c\u00e1c d\u00f2ng s\u1ea3n ph\u1ea9m b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 c\u1ea5u h\u00ecnh, CHAC Electric cung c\u1ea5p th\u00f4ng tin c\u00f4ng khai v\u1ec1 C\u00e1c s\u1ea3n ph\u1ea9m MCB<\/strong><\/a> v\u00e0 thi\u1ebft b\u1ecb ph\u00e2n ph\u1ed1i \u0111i\u1ec7n<\/strong><\/a>. H\u00e3y coi c\u00e1c trang n\u00e0y l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u v\u00e0 x\u00e1c nh\u1eadn d\u1eef li\u1ec7u m\u00f4 h\u00ecnh ch\u00ednh x\u00e1c cho d\u1ef1 \u00e1n c\u1ee7a b\u1ea1n.<\/p>\n

    <\/p>\n

    \u0110\u1ecdc k\u00fd hi\u1ec7u c\u00f9ng v\u1edbi l\u1ecbch tr\u00ecnh m\u1ea1ch \u0111i\u1ec7n<\/h2>\n

    An K\u00fd hi\u1ec7u c\u1ea7u dao t\u1ef1 \u0111\u1ed9ng MCB<\/strong><\/a> l\u00e0 quy \u01b0\u1edbc v\u1ebd g\u1ecdn, kh\u00f4ng ph\u1ea3i l\u00e0 thay th\u1ebf cho b\u1ea3ng li\u1ec7t k\u00ea thi\u1ebft b\u1ecb. H\u00e3y k\u1ebft h\u1ee3p n\u00f3 v\u1edbi m\u1ed9t s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i<\/strong><\/a> n\u00eau r\u00f5 s\u1ed1 c\u1ef1c, \u0111\u1ecbnh m\u1ee9c v\u00e0 m\u1ea1ch \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7. Ki\u1ec3m tra th\u1ee9 ba l\u00e0 s\u1ed1 c\u1ef1c<\/strong>k\u00fd hi\u1ec7u c\u00f3 th\u1ec3 th\u1ec3 hi\u1ec7n m\u1ed9t ch\u1ee9c n\u0103ng chuy\u1ec3n m\u1ea1ch m\u00e0 kh\u00f4ng c\u1ea7n hi\u1ec3n th\u1ecb m\u1ecdi chi ti\u1ebft l\u1eafp \u0111\u1eb7t c\u1ea7n thi\u1ebft cho vi\u1ec7c mua s\u1eafm.<\/p>\n

    Khi trao \u0111\u1ed5i b\u1ea3n v\u1ebd gi\u1eefa c\u00e1c nh\u00f3m ch\u1ecbu \u1ea3nh h\u01b0\u1edfng b\u1edfi ti\u00eau chu\u1ea9n IEC v\u00e0 ANSI, h\u00e3y \u0111\u00ednh k\u00e8m b\u1ea3ng ch\u00fa gi\u1ea3i v\u00e0 t\u00e0i li\u1ec7u tham kh\u1ea3o m\u00f4 h\u00ecnh. B\u01b0\u1edbc nh\u1ecf \u0111\u00f3 gi\u00fap ng\u0103n vi\u1ec7c hi\u1ec3u nh\u1ea7m m\u1ed9t k\u00fd hi\u1ec7u l\u00e0 b\u1eb1ng ch\u1ee9ng c\u1ee7a kh\u1ea3 n\u0103ng c\u1eaft, b\u1ea3o v\u1ec7 d\u00f2ng \u0111i\u1ec7n d\u01b0 ho\u1eb7c m\u1ed9t \u0111\u1eb7c tuy\u1ebfn c\u1eaft c\u1ee5 th\u1ec3.<\/p>\n

    B\u00e0i vi\u1ebft li\u00ean quan: Aptomat t\u00e9p 3 pha (MCB 3 pha)<\/a> th\u1ec3 hi\u1ec7n c\u00e1ch th\u00f4ng tin c\u1ef1c thay \u0111\u1ed5i trong s\u01a1 \u0111\u1ed3 ba pha.<\/p>\n

    C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n

    C\u00f3 m\u1ed9t k\u00fd hi\u1ec7u MCB ph\u1ed5 qu\u00e1t n\u00e0o kh\u00f4ng?<\/h3>\n

    C\u00e1c quy \u01b0\u1edbc c\u00f3 th\u1ec3 kh\u00e1c nhau \u0111\u00f4i ch\u00fat theo v\u00f9ng v\u00e0 th\u01b0 vi\u1ec7n CAD. H\u00e3y s\u1eed d\u1ee5ng ch\u00fa gi\u1ea3i d\u1ef1 \u00e1n v\u00e0 m\u1ed9t t\u1eadp h\u1ee3p k\u00fd hi\u1ec7u \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn nh\u01b0 IEC 60617, sau \u0111\u00f3 l\u00e0m cho b\u1ea3ng thi\u1ebft b\u1ecb tr\u1edf th\u00e0nh t\u00e0i li\u1ec7u c\u00f3 th\u1ea9m quy\u1ec1n.<\/p>\n

    MCB n\u00ean xu\u1ea5t hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o tr\u00ean s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i?<\/h3>\n

    Hi\u1ec3n th\u1ecb thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 tr\u00ean m\u1ea1ch c\u1ea5p ngu\u1ed3n, x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ef1c v\u00e0 d\u00e1n nh\u00e3n v\u00e0o b\u1ea3ng bi\u1ec3u. Th\u00eam \u0111\u1ecbnh m\u1ee9c v\u00e0 \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh \u1edf nh\u1eefng n\u01a1i \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ph\u1ed1i h\u1ee3p b\u1ea3o v\u1ec7.<\/p>\n

    C\u00e1c k\u00fd hi\u1ec7u ON v\u00e0 OFF c\u00f3 thu\u1ed9c v\u1ec1 s\u01a1 \u0111\u1ed3 m\u1ea1ch \u0111i\u1ec7n kh\u00f4ng?<\/h3>\n

    Ch\u00fang r\u1ea5t h\u1eefu \u00edch tr\u00ean b\u1ea3n v\u1ebd t\u1ee7 \u0111i\u1ec7n v\u00e0 s\u01a1 \u0111\u1ed3 \u0111i d\u00e2y, nh\u01b0ng s\u01a1 \u0111\u1ed3 m\u1ed9t s\u1ee3i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ch\u00fa th\u00edch tr\u1ea1ng th\u00e1i chuy\u1ec3n m\u1ea1ch thay th\u1ebf. Gi\u1eef cho c\u00e1ch th\u1ec3 hi\u1ec7n \u0111\u01b0\u1ee3c nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c t\u00e0i li\u1ec7u.<\/p>\n

    T\u1ea1i sao ph\u1ea3i th\u1ec3 hi\u1ec7n \u0111\u01b0\u1eddng cong tr\u00ean b\u1ea3n v\u1ebd?<\/h3>\n

    \u0110\u01b0\u1eddng cong gi\u00fap ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 ki\u1ec3m tra c\u00e1c gi\u1ea3 \u0111\u1ecbnh v\u1ec1 kh\u1ea3 n\u0103ng ph\u00e2n bi\u1ec7t v\u00e0 d\u00f2ng kh\u1edfi \u0111\u1ed9ng. N\u00f3 ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi m\u00f4 h\u00ecnh \u0111\u00e3 ch\u1ecdn v\u00e0 nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p.<\/p>\n

    T\u00e0i li\u1ec7u tham kh\u1ea3o c\u00f3 th\u1ea9m quy\u1ec1n<\/h2>\n