{"id":531,"date":"2026-06-06T23:48:09","date_gmt":"2026-06-06T23:48:09","guid":{"rendered":"https:\/\/khkrh7q1ur.wpdns.site\/?p=531"},"modified":"2026-06-06T23:48:11","modified_gmt":"2026-06-06T23:48:11","slug":"mcb-calibration-machine-and-how-it-works","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/mcb-calibration-machine-and-how-it-works\/","title":{"rendered":"M\u00e1y hi\u1ec7u chu\u1ea9n MCB l\u00e0 g\u00ec v\u00e0 ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?"},"content":{"rendered":"

Kh\u00f3 kh\u0103n th\u1ef1c s\u1ef1 trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t:<\/strong> Trong giai \u0111o\u1ea1n th\u1eed nghi\u1ec7m cu\u1ed1i c\u00f9ng, ch\u00fang t\u00f4i \u0111\u00e3 ph\u1ea3i lo\u1ea1i b\u1ecf 8% MCB do hi\u1ec7n t\u01b0\u1ee3ng l\u1ec7ch \u0111i\u1ec3m ng\u1eaft nhi\u1ec7t. Nguy\u00ean nh\u00e2n c\u1ee7a s\u1ef1 c\u1ed1 n\u00e0y l\u00e0 do b\u00e0n hi\u1ec7u chu\u1ea9n m\u00e0 ch\u00fang t\u00f4i \u0111ang s\u1eed d\u1ee5ng kh\u00f4ng duy tr\u00ec \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh trong th\u1eddi gian d\u00e0i h\u01a1n 30 ph\u00fat. Kh\u00f4ng c\u00f3 c\u00e1ch n\u00e0o \u0111\u1ec3 x\u00e1c minh vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh \u0111\u00fang c\u00e1c t\u1ea5m kim lo\u1ea1i k\u00e9p v\u1edbi c\u00e1c l\u1ea7n hi\u1ec7u chu\u1ea9n tr\u01b0\u1edbc \u0111\u00e2y c\u1ee7a ch\u00fang t\u00f4i. \u2014 Tr\u01b0\u1edfng ph\u00f2ng Ch\u1ea5t l\u01b0\u1ee3ng, nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb \u0111i\u1ec7n quy m\u00f4 trung b\u00ecnh<\/p><\/blockquote>\n

M\u00e1y hi\u1ec7u chu\u1ea9n MCB<\/strong><\/a> l\u00e0 c\u00e1c thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra v\u00e0 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c \u0111\u1eb7c t\u00ednh ng\u1eaft m\u1ea1ch do qu\u00e1 nhi\u1ec7t ho\u1eb7c qu\u00e1 t\u1ea3i c\u1ee7a c\u00e1c c\u1ea7u dao mini. B\u00e0n hi\u1ec7u chu\u1ea9n c\u00f3 kh\u1ea3 n\u0103ng t\u1ea1o ra c\u00e1c t\u1ea3i qu\u00e1 t\u1ea3i ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh (th\u01b0\u1eddng trong kho\u1ea3ng t\u1eeb 100% \u0111\u1ebfn 135%) \u0111\u1ed3ng th\u1eddi \u0111o th\u1eddi gian ng\u1eaft m\u1ea1ch c\u1ee7a c\u00e1c c\u1ea7u dao (+\/- 0,1%) \u0111\u1ec3 gi\u00fap \u0111i\u1ec1u ch\u1ec9nh d\u1ea3i l\u01b0\u1ee1ng kim sao cho c\u1ea7u dao ng\u1eaft m\u1ea1ch trong m\u1ed9t kho\u1ea3ng th\u1eddi gian r\u1ea5t h\u1eb9p (v\u00ed d\u1ee5: 45 \u2013 55 gi\u00e2y \u1edf 135% In). H\u01b0\u1edbng d\u1eabn n\u00e0y m\u00f4 t\u1ea3 c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y hi\u1ec7u chu\u1ea9n MCB \u0111\u00fang c\u00e1ch; li\u1ec7t k\u00ea c\u00e1c lo\u1ea1i m\u00e1y (th\u1ee7 c\u00f4ng, b\u00e1n t\u1ef1 \u0111\u1ed9ng, th\u1eddi gian d\u00e0i), c\u0169ng nh\u01b0 cung c\u1ea5p th\u00f4ng tin v\u1ec1 c\u00e1ch ch\u1ecdn m\u00e1y ph\u00f9 h\u1ee3p cho ph\u00f2ng th\u00ed nghi\u1ec7m s\u1ea3n xu\u1ea5t ho\u1eb7c c\u01a1 s\u1edf s\u1ea3n xu\u1ea5t c\u1ee7a b\u1ea1n.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m:<\/h2>\n
    \n
  • M\u00e1y hi\u1ec7u chu\u1ea9n MCB l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i kh\u00e1c v\u1edbi m\u00e1y ki\u1ec3m tra<\/li>\n
  • Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng: m\u00f4 ph\u1ecfng ng\u1eaft nhi\u1ec7t, \u0111i\u1ec1u khi\u1ec3n d\u00f2ng \u0111i\u1ec7n v\u00e0 th\u1eddi gian<\/li>\n
  • C\u00e1c lo\u1ea1i b\u00e0n hi\u1ec7u chu\u1ea9n: th\u1ee7 c\u00f4ng, b\u00e1n t\u1ef1 \u0111\u1ed9ng (lo\u1ea1i A\/B) v\u00e0 b\u00e0n hi\u1ec7u chu\u1ea9n d\u00e0i h\u1ea1n<\/li>\n
  • C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh c\u1ea7n \u0111\u00e1nh gi\u00e1 (d\u1ea3i \u0111o, \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh)<\/li>\n
  • C\u00e1ch ch\u1ecdn m\u00e1y hi\u1ec7u chu\u1ea9n d\u1ef1a tr\u00ean nhu c\u1ea7u v\u1ec1 c\u00f4ng su\u1ea5t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c<\/li>\n
  • C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p: Hi\u1ec7u chu\u1ea9n MCB, ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c v\u00e0 quy t\u1eafc 80%<\/li>\n<\/ul>\n

    \"M\u00e1y<\/p>\n

    1. M\u00e1y hi\u1ec7u chu\u1ea9n MCB l\u00e0 g\u00ec? (\u0110\u1ecbnh ngh\u0129a v\u00e0 m\u1ee5c \u0111\u00edch)<\/h2>\n

    M\u00e1y hi\u1ec7u chu\u1ea9n cho MCB (c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 B\u00e0n hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t) \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 hi\u1ec7u chu\u1ea9n b\u1ed9 ph\u1eadn ng\u1eaft qu\u00e1 t\u1ea3i nhi\u1ec7t c\u1ee7a C\u00f4ng t\u1eafc ng\u1eaft m\u1ea1ch thu nh\u1ecf. Trong m\u1ed7i MCB, c\u00f3 m\u1ed9t d\u1ea3i kim lo\u1ea1i k\u00e9p u\u1ed1n cong do nhi\u1ec7t sinh ra t\u1eeb d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i \u0111i qua n\u00f3. N\u1ebfu d\u1ea3i kim lo\u1ea1i u\u1ed1n cong qu\u00e1 s\u1edbm ho\u1eb7c qu\u00e1 mu\u1ed9n, n\u00f3 s\u1ebd ng\u1eaft ngo\u00e0i \u0111\u1eb7c t\u00ednh th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n \u0111\u00e3 c\u00f4ng b\u1ed1 (theo ti\u00eau chu\u1ea9n IEC 60898-1). M\u00e1y hi\u1ec7u chu\u1ea9n s\u1ebd \u00e1p d\u1ee5ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh (1,45\u00d7 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c cho Lo\u1ea1i B\/C\/D) v\u00e0o MCB \u0111ang \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n v\u00e0 \u0111o th\u1eddi gian th\u1ef1c t\u1ebf c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u1eaft m\u1ea1ch. Khi \u0111\u00e3 c\u00f3 th\u1eddi gian ng\u1eaft m\u1ea1ch, n\u1ebfu n\u1eb1m ngo\u00e0i kho\u1ea3ng ch\u1ea5p nh\u1eadn, ng\u01b0\u1eddi v\u1eadn h\u00e0nh (ho\u1eb7c tr\u1ea1m \u0111i\u1ec1u ch\u1ec9nh t\u1ef1 \u0111\u1ed9ng) s\u1ebd v\u1eb7n v\u00edt hi\u1ec7u chu\u1ea9n \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ed9 u\u1ed1n cong c\u1ee7a d\u1ea3i l\u01b0\u1ee1ng kim b\u1eb1ng c\u00e1ch t\u0103ng ho\u1eb7c gi\u1ea3m \u0111\u1ed9 u\u1ed1n cong c\u1ee7a n\u00f3. Sau khi \u0111i\u1ec1u ch\u1ec9nh, qu\u00e1 tr\u00ecnh ng\u1eaft m\u1ea1ch s\u1ebd \u0111\u01b0\u1ee3c ki\u1ec3m tra l\u1ea1i cho \u0111\u1ebfn khi n\u1eb1m trong ph\u1ea1m vi ti\u00eau chu\u1ea9n \u0111\u00fang. Quy tr\u00ecnh n\u00e0y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ecdi MCB \u0111\u1ec1u cung c\u1ea5p m\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7 nh\u01b0 nhau khi r\u1eddi kh\u1ecfi nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n

    M\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 s\u1ea3n ph\u1ea9m c\u1ee7a Benlong Automation bao g\u1ed3m: B\u00e0n hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t th\u1ee7 c\u00f4ng MCB (d\u00e0nh cho ng\u01b0\u1eddi m\u1edbi b\u1eaft \u0111\u1ea7u) v\u00e0 B\u00e0n hi\u1ec7u chu\u1ea9n b\u00e1n t\u1ef1 \u0111\u1ed9ng lo\u1ea1i A c\u00f3 c\u01a1 ch\u1ebf chuy\u1ec3n \u0111\u1ed5i \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m thi\u1ebft k\u1ebf kh\u00e1c nhau c\u1ee7a MCB.<\/p>\n

    2. M\u00e1y hi\u1ec7u chu\u1ea9n MCB ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o?<\/h2>\n

    C\u00e1c nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u01a1 b\u1ea3n bao g\u1ed3m 3 h\u1ec7 th\u1ed1ng con ch\u00ednh: t\u1ea1o d\u00f2ng \u0111i\u1ec7n, \u0111o th\u1eddi gian v\u00e0 h\u1ec7 th\u1ed1ng gi\u00e1 \u0111\u1ee1.<\/p>\n

    2.1 Ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh, c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh<\/h3>\n

    Thi\u1ebft b\u1ecb n\u00e0y t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh trong kho\u1ea3ng t\u1eeb v\u00e0i Ampe \u0111\u1ebfn 500 Ampe, t\u00f9y thu\u1ed9c v\u00e0o t\u1eebng m\u1eabu. Qu\u00e1 tr\u00ecnh hi\u1ec7u chu\u1ea9n y\u00eau c\u1ea7u ph\u1ea3i \u0111\u1eb7t d\u00f2ng \u0111i\u1ec7n \u1edf m\u1ee9c 135% so v\u1edbi \u0111\u1ecbnh m\u1ee9c In c\u1ee7a MCB (B\u1ed9 ng\u1eaft m\u1ea1ch thu nh\u1ecf) \u0111ang \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n. D\u00f2ng \u0111i\u1ec7n hi\u1ec7u chu\u1ea9n nhi\u1ec7t cho m\u1ed9t MCB ti\u00eau chu\u1ea9n c\u00f3 \u0111\u1ecbnh m\u1ee9c 10 Ampe s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 13,5 Ampe \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ch\u1ee9c n\u0103ng ng\u1eaft nhi\u1ec7t (d\u00e0i h\u1ea1n). D\u00f2ng \u0111i\u1ec7n c\u0169ng ph\u1ea3i \u0111\u01b0\u1ee3c duy tr\u00ec trong ph\u1ea1m vi dung sai \u00b12% trong kho\u1ea3ng th\u1eddi gian m\u1ed9t gi\u1edd; n\u1ebfu kh\u00f4ng, th\u1eddi gian ng\u1eaft m\u1ea1ch s\u1ebd b\u1ecb l\u1ec7ch v\u00e0 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c. B\u00e0n hi\u1ec7u chu\u1ea9n nhi\u1ec7t d\u00e0i h\u1ea1n MCB c\u1ee7a Benlong, s\u1eed d\u1ee5ng b\u1ed9 \u0111i\u1ec1u khi\u1ec3n IGBT (Bipolar Transistor C\u1ed5ng C\u00e1ch \u0111i\u1ec7n) ho\u1eb7c Thyristor \u0111\u1ec3 duy tr\u00ec ph\u1ea3n h\u1ed3i v\u00f2ng k\u00edn \u1ed5n \u0111\u1ecbnh c\u1ee7a s\u00f3ng li\u00ean t\u1ee5c (CW), s\u1ebd \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh c\u1ee7a d\u00f2ng \u0111i\u1ec7n hi\u1ec7u chu\u1ea9n theo y\u00eau c\u1ea7u. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt hi\u1ec7u su\u1ea5t bao g\u1ed3m: C\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c m\u1ed7i tr\u1ea1m = 1 kVA, C\u00f4ng su\u1ea5t \u0111\u1ea7u ra t\u1ed1i \u0111a = 500 Ampe, \u0110\u1ed9 m\u00e9o d\u1ea1ng s\u00f3ng \u0111\u1ea7u ra t\u1ed1i \u0111a = < 3%.<\/p>\n

    2.2 \u0110o th\u1eddi gian ch\u00ednh x\u00e1c cao v\u00e0 ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1<\/h3>\n

    B\u1ed9 \u0111\u1ebfm th\u1eddi gian t\u00edch h\u1ee3p l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u00e1y th\u1eed nghi\u1ec7m; n\u00f3 b\u1eaft \u0111\u1ea7u \u0111\u1ebfm ng\u01b0\u1ee3c khi d\u00f2ng \u0111i\u1ec7n ch\u1ea1y v\u00e0o MCB \u0111ang \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m v\u00e0 ti\u1ebfp t\u1ee5c cho \u0111\u1ebfn khi t\u1ea5t c\u1ea3 c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a MCB ng\u1eaft m\u1edf. Th\u1eddi gian l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng trong b\u1ed1i c\u1ea3nh c\u00e1c th\u1eed nghi\u1ec7m d\u00e0i h\u1ea1n (t\u1eeb 1 \u0111\u1ebfn 60 ph\u00fat) \u00b10,1%, do \u0111\u00f3, v\u00ed d\u1ee5, sai s\u1ed1 cho ph\u00e9p \u0111\u1ed1i v\u1edbi m\u1ed9t l\u1ea7n ng\u1eaft 60 gi\u00e2y s\u1ebd kh\u00f4ng qu\u00e1 0,06 gi\u00e2y. B\u1ea3ng d\u1eef li\u1ec7u cho b\u0103ng gh\u1ebf hi\u1ec7u chu\u1ea9n nhi\u1ec7t th\u1eddi gian d\u00e0i MCB quy \u0111\u1ecbnh \u0111\u1ed9 ch\u00ednh x\u00e1c th\u1eddi gian l\u00e0 \u00b10,1%, v\u1edbi ph\u1ea1m vi hi\u1ec3n th\u1ecb th\u1eddi gian t\u1eeb 1 gi\u00e2y \u0111\u1ebfn 9 gi\u1edd, 59 ph\u00fat. \u0110\u1ec3 t\u0103ng n\u0103ng su\u1ea5t, nhi\u1ec1u tr\u1ea1m (th\u01b0\u1eddng l\u00e0 4 \u0111\u1ebfn 10) s\u1ebd \u0111\u1ed3ng th\u1eddi ki\u1ec3m tra nhi\u1ec1u MCB.<\/p>\n

    2.3 C\u01a1 c\u1ea5u k\u1eb9p v\u00e0 \u0111i\u1ec1u ch\u1ec9nh<\/h3>\n

    Khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 hi\u1ec7u chu\u1ea9n MCB, c\u00e1c b\u00e0n hi\u1ec7u chu\u1ea9n th\u1ee7 c\u00f4ng \u2013 ch\u1eb3ng h\u1ea1n nh\u01b0 nh\u1eefng lo\u1ea1i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng v\u1edbi MCB th\u00f4ng qua b\u00e0n hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t \u2013 ng\u01b0\u1eddi v\u1eadn h\u00e0nh g\u1eafn tr\u00ean tr\u1ee5c s\u1ebd k\u00edch ho\u1ea1t ng\u1eaft th\u1ee7 c\u00f4ng c\u1ee7a MCB v\u00e0 s\u1eed d\u1ee5ng m\u00e0n h\u00ecnh \u0111o l\u01b0\u1eddng k\u1ef9 thu\u1eadt s\u1ed1 \u0111\u1ec3 ghi l\u1ea1i th\u1eddi gian ng\u1eaft nhi\u1ec7t c\u1ee7a MCB; t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ng\u01b0\u1eddi v\u1eadn h\u00e0nh \u0111i\u1ec1u ch\u1ec9nh c\u00e0i \u0111\u1eb7t hi\u1ec7u chu\u1ea9n c\u1ee7a MCB b\u1eb1ng tua v\u00edt tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n l\u1ea7n th\u1eed nghi\u1ec7m th\u1ee9 hai. C\u00e1c lo\u1ea1i B\u00e0n hi\u1ec7u chu\u1ea9n b\u00e1n t\u1ef1 \u0111\u1ed9ng A & B c\u00f3 k\u1eb9p kh\u00ed n\u00e9n v\u00e0 b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh hi\u1ec7u chu\u1ea9n \u0111\u1ed9ng c\u01a1 l\u00e0 c\u00e1c t\u00ednh n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb, trong \u0111\u00f3 ng\u01b0\u1eddi v\u1eadn h\u00e0nh ch\u1ec9 c\u1ea7n n\u1ea1p v\u00e0 th\u00e1o t\u1ea3i, c\u00f2n m\u00e1y s\u1ebd th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m v\u00e0 \u0111i\u1ec1u ch\u1ec9nh th\u1eddi gian ng\u1eaft trong ph\u1ea1m vi ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng nhi\u1ec1u l\u1ea7n th\u1eed nghi\u1ec7m l\u1eb7p l\u1ea1i v\u00e0 cung c\u1ea5p k\u1ebft qu\u1ea3 cho ng\u01b0\u1eddi v\u1eadn h\u00e0nh m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 t\u01b0\u01a1ng t\u00e1c th\u00eam t\u1eeb ng\u01b0\u1eddi v\u1eadn h\u00e0nh. Lo\u1ea1i B \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c th\u1ebb c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau \u0111\u1ec3 c\u00f3 nhi\u1ec1u kh\u1ea3 n\u0103ng th\u1eed nghi\u1ec7m, bao g\u1ed3m MCB t\u1eeb nhi\u1ec1u nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c nhau.<\/p>\n

    \"C\u00e1c<\/p>\n

    3. C\u00e1c lo\u1ea1i m\u00e1y hi\u1ec7u chu\u1ea9n MCB<\/h2>\n

    D\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 th\u1eddi gian th\u1ef1c hi\u1ec7n ki\u1ec3m th\u1eed, c\u00f3 ba lo\u1ea1i ph\u1ed5 bi\u1ebfn:<\/p>\n

      \n
    • B\u00e0n hi\u1ec7u chu\u1ea9n ng\u1eaft nhi\u1ec7t th\u1ee7 c\u00f4ng: <\/strong>L\u1ef1a ch\u1ecdn c\u00f3 chi ph\u00ed th\u1ea5p nh\u1ea5t n\u1eb1m trong kho\u1ea3ng t\u1eeb $5.000 \u0111\u1ebfn $15.000. Ng\u01b0\u1eddi v\u1eadn h\u00e0nh s\u1ebd theo d\u00f5i th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u00e1c \u1ed1c v\u00edt th\u1ee7 c\u00f4ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t. Gi\u1ea3i ph\u00e1p n\u00e0y ph\u00f9 h\u1ee3p cho nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n, c\u00e1c l\u00f4 h\u00e0ng nh\u1ecf (t\u1ed1i \u0111a 200 s\u1ea3n ph\u1ea9m) v\u00e0 s\u1eed d\u1ee5ng t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng.<\/li>\n
    • B\u00e0n hi\u1ec7u chu\u1ea9n b\u00e1n t\u1ef1 \u0111\u1ed9ng (Lo\u1ea1i A \/ Lo\u1ea1i B): <\/strong>Ph\u1ea1m vi gi\u00e1 th\u00f4ng th\u01b0\u1eddng t\u1eeb $15k-35k; th\u01b0\u1eddng bao g\u1ed3m ch\u1ee9c n\u0103ng c\u1ea5p d\u00f2ng \u0111i\u1ec7n t\u1ef1 \u0111\u1ed9ng (cho l\u01b0\u1ee3ng \u0111i\u1ec7n n\u0103ng c\u1ea7n thi\u1ebft) v\u00e0 ph\u00e1t hi\u1ec7n ng\u1eaft m\u1ea1ch (khi x\u1ea3y ra s\u1ef1 c\u1ed1 ng\u1eaft m\u1ea1ch), c\u0169ng nh\u01b0 \u0111\u00f4i khi c\u00f3 ch\u1ee9c n\u0103ng \u0111i\u1ec1u ch\u1ec9nh b\u1eb1ng \u0111\u1ed9ng c\u01a1 (\u0111\u1ec3 th\u00edch \u1ee9ng v\u1edbi t\u1ea3i\/x\u1ea3 t\u1ea3i); ng\u01b0\u1eddi v\u1eadn h\u00e0nh t\u1ea3i\/x\u1ea3; ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong kh\u1ed1i l\u01b0\u1ee3ng trung b\u00ecnh (200 \u2013 1.500 s\u1ea3n ph\u1ea9m\/ng\u00e0y); lo\u1ea1i \u2018A\u2019 bao g\u1ed3m c\u01a1 ch\u1ebf chuy\u1ec3n \u0111\u1ed5i \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft k\u1ebf kh\u00e1c nhau c\u1ee7a (MCB); lo\u1ea1i \u2018B\u2019 s\u1eed d\u1ee5ng th\u1ebb c\u1eafm \u0111\u1ec3 chuy\u1ec3n \u0111\u1ed5i nhanh ch\u00f3ng.<\/li>\n
    • B\u00e0n hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u0111\u1ed9 d\u00e0i h\u1ea1n: <\/strong>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng trong th\u1eddi gian d\u00e0i \u1edf d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c 100% (t\u1eeb 1 \u0111\u1ebfn 8 gi\u1edd). D\u00f9ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m ki\u1ec3u (\u0111\u1ec3 ch\u1ee9ng minh c\u00e1c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c) ho\u1eb7c x\u00e1c minh hi\u1ec7u \u1ee9ng b\u1ed9 nh\u1edb nhi\u1ec7t. C\u00f3 th\u1ec3 bao g\u1ed3m nhi\u1ec1u tr\u1ea1m th\u1eed nghi\u1ec7m \u0111\u1ed9c l\u1eadp (t\u1eeb 4 \u0111\u1ebfn 12) v\u00e0 c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 ghi d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n

      4. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh c\u1ea7n \u0111\u00e1nh gi\u00e1 (d\u1ef1a tr\u00ean d\u1eef li\u1ec7u th\u1ef1c t\u1ebf)<\/h2>\n

      Khi so s\u00e1nh c\u00e1c m\u00e1y hi\u1ec7u chu\u1ea9n MCB, h\u00e3y y\u00eau c\u1ea7u cung c\u1ea5p c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ghi ch\u00e9p l\u1ea1i sau \u0111\u00e2y:<\/p>\n

        \n
      • D\u1ea3i d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7u ra v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c<\/span>: B\u00e0n \u0111o d\u00e0i h\u1ea1n Benlong cho ph\u00e9p \u0111o t\u1eeb 0,01 \u0111\u1ebfn 500 Ampe tr\u00ean m\u1ed7i tr\u1ea1m, v\u1edbi \u0111\u1ed9 kh\u00f4ng \u0111\u1ea3m b\u1ea3o l\u00e0 1%. D\u1ea3i \u0111\u1ecbnh m\u1ee9c MCB c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem x\u00e9t s\u1ebd dao \u0111\u1ed9ng t\u1eeb 1 \u2013 63 Ampe ho\u1eb7c trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, l\u00ean \u0111\u1ebfn 125 Ampe.<\/li>\n
      • \u0110\u1ed9 ch\u00ednh x\u00e1c v\u1ec1 th\u1eddi gian<\/span>: \u00b10,1% ho\u1eb7c t\u1ed1t h\u01a1n. \u0110\u1ed1i v\u1edbi c\u00e1c th\u1eed nghi\u1ec7m k\u00e9o d\u00e0i, \u0111\u1ed9 tr\u00f4i trong 8 gi\u1edd ph\u1ea3i nh\u1ecf h\u01a1n 0,5%.<\/li>\n
      • S\u1ed1 l\u01b0\u1ee3ng tr\u1ea1m ki\u1ec3m tra<\/span>: T\u1eeb 1 \u0111\u1ebfn 12. S\u1ed1 l\u01b0\u1ee3ng tr\u1ea1m c\u00e0ng nhi\u1ec1u th\u00ec c\u00f4ng su\u1ea5t c\u00e0ng cao, nh\u01b0ng c\u0169ng c\u1ea7n di\u1ec7n t\u00edch s\u00e0n l\u1edbn h\u01a1n.<\/li>\n
      • S\u1ef1 bi\u1ebfn d\u1ea1ng d\u1ea1ng s\u00f3ng<\/span>: <3% (THD) \u2013 \u0111\u1ed9 m\u00e9o cao h\u01a1n \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn qu\u00e1 tr\u00ecnh gia nhi\u1ec7t b\u1eb1ng h\u1ee3p kim hai kim lo\u1ea1i.<\/li>\n
      • \u0110i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n<\/span>: >10 M\u03a9 (an to\u00e0n).<\/li>\n
      • Tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n<\/span>: Ti\u00eau chu\u1ea9n IEC 60898\u20111 (\u0111\u1ed1i v\u1edbi MCB) ho\u1eb7c c\u00e1c ph\u01b0\u01a1ng \u00e1n th\u1eed nghi\u1ec7m theo y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 c\u1ee7a kh\u00e1ch h\u00e0ng.<\/li>\n<\/ul>\n

        5. C\u00e1ch ch\u1ecdn m\u00e1y hi\u1ec7u chu\u1ea9n MCB ph\u00f9 h\u1ee3p cho nh\u00e0 m\u00e1y c\u1ee7a b\u1ea1n<\/h2>\n

        H\u00e3y tham kh\u1ea3o h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn n\u00e0y d\u1ef1a tr\u00ean kh\u1ed1i l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c h\u00e0ng ng\u00e0y v\u00e0 y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a b\u1ea1n:<\/p>\n\n\n\n\n\n\n\n
        S\u1ea3n l\u01b0\u1ee3ng h\u00e0ng ng\u00e0y<\/th>\nM\u00e1y \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n\u01afu \u0111i\u1ec3m n\u1ed5i b\u1eadt<\/th>\n<\/tr>\n<\/thead>\n
        < 200 \u0111\u01a1n v\u1ecb<\/td>\nB\u00e0n th\u1eed ng\u1eaft nhi\u1ec7t th\u1ee7 c\u00f4ng<\/td>\nS\u1ed1 v\u1ed1n \u0111\u1ea7u t\u01b0 th\u1ea5p nh\u1ea5t<\/td>\n<\/tr>\n
        200\u20131.000 \u0111\u01a1n v\u1ecb<\/td>\nLo\u1ea1i b\u00e1n t\u1ef1 \u0111\u1ed9ng A ho\u1eb7c lo\u1ea1i b\u00e1n t\u1ef1 \u0111\u1ed9ng B<\/td>\nS\u1ef1 c\u00e2n b\u1eb1ng gi\u1eefa t\u1ed1c \u0111\u1ed9 v\u00e0 chi ph\u00ed<\/td>\n<\/tr>\n
        >1.000 \u0111\u01a1n v\u1ecb<\/td>\nB\u00e0n th\u00ed nghi\u1ec7m \u0111a tr\u1ea1m d\u00e0i h\u1ea1n<\/td>\nC\u00f4ng su\u1ea5t cao, ghi nh\u1eadt k\u00fd d\u1eef li\u1ec7u<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        Khi xem x\u00e9t nhu c\u1ea7u c\u1ee7a m\u00ecnh, b\u1ea1n n\u00ean c\u00e2n nh\u1eafc xem li\u1ec7u b\u1ea1n ch\u1ec9 c\u1ea7n ki\u1ec3m tra c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft nhi\u1ec7t hay ch\u1ec9 c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft t\u1eeb. Ph\u1ea7n l\u1edbn c\u00e1c b\u00e0n hi\u1ec7u chu\u1ea9n ch\u1ec9 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ki\u1ec3m tra c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft nhi\u1ec7t (th\u1eddi gian d\u00e0i). B\u1ea1n s\u1ebd c\u1ea7n m\u1ed9t thi\u1ebft b\u1ecb ki\u1ec3m tra t\u1ee9c th\u1eddi b\u1ed5 sung cho thi\u1ebft b\u1ecb ng\u1eaft t\u1eeb t\u00ednh, m\u1eb7c d\u00f9 c\u00f3 m\u1ed9t s\u1ed1 m\u1eabu ti\u00ean ti\u1ebfn cung c\u1ea5p c\u1ea3 hai t\u00ednh n\u0103ng n\u00e0y. C\u00e1c b\u00e0n hi\u1ec7u chu\u1ea9n m\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 gi\u1edbi thi\u1ec7u tr\u01b0\u1edbc \u0111\u00f3 trong b\u00e0i vi\u1ebft n\u00e0y s\u1ebd r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 hi\u1ec7u chu\u1ea9n chuy\u00ean d\u1ee5ng cho b\u1ea5t k\u1ef3 lo\u1ea1i thi\u1ebft b\u1ecb ng\u1eaft n\u00e0o trong hai lo\u1ea1i tr\u00ean.<\/p>\n

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

        Hi\u1ec7u chu\u1ea9n MCB l\u00e0 g\u00ec?<\/h3>\n

        Hi\u1ec7u chu\u1ea9n MCB<\/strong> Vi\u1ec7c hi\u1ec7u chu\u1ea9n c\u1ea7u dao mini bao g\u1ed3m vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh c\u01a1 ch\u1ebf ng\u1eaft nhi\u1ec7t (d\u1ea3i l\u01b0\u1ee1ng kim). M\u1ee5c \u0111\u00edch c\u1ee7a vi\u1ec7c \u0111i\u1ec1u ch\u1ec9nh n\u00e0y l\u00e0 \u0111\u1ea3m b\u1ea3o c\u1ea7u dao ng\u1eaft trong m\u1ed9t kho\u1ea3ng th\u1eddi gian x\u00e1c \u0111\u1ecbnh khi c\u00f3 d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i \u0111i qua. D\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf m\u1ee9c 1,45 l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c theo quy \u0111\u1ecbnh c\u1ee7a ti\u00eau chu\u1ea9n IEC60898-1 cho c\u00e1c lo\u1ea1i B, C & D (t\u1ee9c l\u00e0 1,45 l\u1ea7n In). Th\u00f4ng th\u01b0\u1eddng, m\u1ed9t m\u00e1y hi\u1ec7u chu\u1ea9n chuy\u00ean d\u1ee5ng s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n vi\u1ec7c hi\u1ec7u chu\u1ea9n b\u1ed9 ng\u1eaft m\u1ea1ch. M\u00e1y hi\u1ec7u chu\u1ea9n s\u1ebd \u00e1p d\u1ee5ng d\u00f2ng \u0111i\u1ec7n ch\u00ednh x\u00e1c v\u00e0 \u1ed5n \u0111\u1ecbnh v\u00e0o c\u1ea7u dao, \u0111o th\u1eddi gian ng\u1eaft m\u1ea1ch, v\u00e0 cho ph\u00e9p ng\u01b0\u1eddi v\u1eadn h\u00e0nh ho\u1eb7c h\u1ec7 th\u1ed1ng t\u1ef1 \u0111\u1ed9ng \u0111i\u1ec1u ch\u1ec9nh hi\u1ec7u chu\u1ea9n ng\u1eaft m\u1ea1ch trong m\u1ed9t ph\u1ea1m vi cho \u0111\u1ebfn khi th\u1eddi gian ng\u1eaft \u0111\u00e1p \u1ee9ng c\u00e1c gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n (v\u00ed d\u1ee5: th\u1eddi gian ng\u1eaft c\u1ee7a c\u1ea7u dao 10A @135% In ph\u1ea3i n\u1eb1m trong kho\u1ea3ng t\u1eeb 45 gi\u00e2y \u0111\u1ebfn 55 gi\u00e2y). Vi\u1ec7c ho\u00e0n th\u00e0nh th\u00e0nh c\u00f4ng quy tr\u00ecnh n\u00e0y gi\u00fap b\u1ed9 ng\u1eaft m\u1ea1ch cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u00e1ng tin c\u1eady tr\u01b0\u1edbc c\u00e1c t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i.<\/p>\n

        L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra xem MCB c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng kh\u00f4ng?<\/h3>\n

        \u0110\u1ec3 x\u00e1c \u0111\u1ecbnh xem m\u1ed9t c\u1ea7u dao mini c\u00f3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng hay kh\u00f4ng, b\u1ea1n ph\u1ea3i th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m nhi\u1ec7t (qu\u00e1 t\u1ea3i) v\u00e0 th\u1eed nghi\u1ec7m t\u1eeb t\u00ednh (ng\u1eafn m\u1ea1ch). \u0110\u1ed1i v\u1edbi th\u1eed nghi\u1ec7m nhi\u1ec7t, h\u00e3y s\u1eed d\u1ee5ng m\u00e1y hi\u1ec7u chu\u1ea9n ho\u1eb7c b\u1ed9 c\u1ea5p d\u00f2ng \u0111i\u1ec7n ch\u00ednh \u0111\u1ec3 c\u1ea5p d\u00f2ng \u0111i\u1ec7n g\u1ea5p 1,45 l\u1ea7n d\u00f2ng \u0111\u1ecbnh m\u1ee9c, v\u00e0 ghi l\u1ea1i th\u1eddi gian ng\u1eaft. MCB ph\u1ea3i ng\u1eaft trong v\u00f2ng 1 gi\u1edd (\u0111\u1ed1i v\u1edbi >10A) ho\u1eb7c 1 ph\u00fat (\u0111\u1ed1i v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ecbnh m\u1ee9c nh\u1ecf h\u01a1n). \u0110\u1ed1i v\u1edbi th\u1eed nghi\u1ec7m t\u1eeb t\u00ednh, \u00e1p d\u1ee5ng d\u00f2ng \u0111i\u1ec7n g\u1ea5p 5-10 l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (t\u00f9y thu\u1ed9c v\u00e0o \u0111\u01b0\u1eddng cong: B, C, D) \u2014 MCB ph\u1ea3i ng\u1eaft trong v\u00f2ng 100 mili gi\u00e2y. Ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac (100 M\u03a9 \u1edf 500V) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o MCB \u0111\u00e1p \u1ee9ng c\u00e1c ti\u00eau chu\u1ea9n ANSI. M\u1ed9t th\u1eed nghi\u1ec7m th\u1ef1c \u0111\u1ecba \u0111\u01a1n gi\u1ea3n, s\u1eed d\u1ee5ng n\u00fat nh\u1ea5n \u0111\u1ec3 ng\u1eaft m\u1ea1ch, ch\u1ec9 ch\u1ee9ng minh li\u00ean k\u1ebft c\u01a1 h\u1ecdc, nh\u01b0ng kh\u00f4ng x\u00e1c nh\u1eadn hi\u1ec7u chu\u1ea9n \u0111i\u1ec7n.<\/p>\n

        Quy t\u1eafc 80% \u0111\u1ed1i v\u1edbi c\u1ea7u dao l\u00e0 g\u00ec?<\/h3>\n

        Theo quy \u0111\u1ecbnh NEC 210.20, quy t\u1eafc 80% c\u1ea5m t\u1ea3i li\u00ean t\u1ee5c l\u00ean c\u00f4ng t\u1eafc ng\u1eaft m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 80% so v\u1edbi \u0111\u1ecbnh m\u1ee9c (\u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n) c\u1ee7a n\u00f3. V\u00ed d\u1ee5, n\u1ebfu m\u1ed9t MCB c\u00f3 c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c l\u00e0 20A, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 n\u00f3 ch\u1ec9 c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n 16A trong h\u01a1n 3 gi\u1edd do s\u1ef1 t\u00edch t\u1ee5 nhi\u1ec7t. Gi\u1ea3 \u0111\u1ecbnh l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng ng\u1eaft m\u1ea1ch kh\u00f4ng mong mu\u1ed1n do t\u00edch t\u1ee5 nhi\u1ec7t s\u1ebd x\u1ea3y ra tr\u00ean c\u00e1c m\u1ea1ch b\u1ecb qu\u00e1 t\u1ea3i li\u00ean t\u1ee5c. Vi\u1ec7c hi\u1ec7u chu\u1ea9n kh\u00f4ng c\u00f3 m\u1ed1i quan h\u1ec7 tr\u1ef1c ti\u1ebfp v\u1edbi quy t\u1eafc 80%, nh\u01b0ng quy tr\u00ecnh hi\u1ec7u chu\u1ea9n \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u1ea7u dao s\u1ebd ng\u1eaft \u0111\u00fang c\u00e1ch khi qu\u00e1 t\u1ea3i (135% so v\u1edbi \u0111\u1ecbnh m\u1ee9c) ngay c\u1ea3 khi c\u1ea7u dao \u0111\u00e3 \u0111\u01b0\u1ee3c t\u1ea3i li\u00ean t\u1ee5c \u1edf m\u1ee9c 100% tr\u00ean m\u1ea1ch, vi ph\u1ea1m quy t\u1eafc 80%. Theo th\u1eddi gian, do s\u1ef1 gi\u00e3n n\u1edf c\u1ee7a t\u1ea5m kim lo\u1ea1i k\u00e9p, c\u00f3 kh\u1ea3 n\u0103ng c\u1ea7u dao b\u1ecb ng\u1eaft kh\u00f4ng mong mu\u1ed1n; do \u0111\u00f3, vi\u1ec7c hi\u1ec7u chu\u1ea9n ph\u1ea3i x\u00e1c nh\u1eadn r\u1eb1ng vi\u1ec7c ng\u1eaft di\u1ec5n ra trong khung th\u1eddi gian ti\u00eau chu\u1ea9n l\u00e0 r\u1ea5t quan tr\u1ecdng. M\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t c\u00f3 ngo\u1ea1i l\u1ec7 \u0111\u1ed1i v\u1edbi ti\u00eau chu\u1ea9n n\u00e0y b\u1eb1ng c\u00e1ch s\u1ea3n xu\u1ea5t c\u00e1c c\u1ea7u dao c\u00f3 c\u00f9ng m\u1ee9c \u0111\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1eb7c bi\u1ec7t c\u0169ng nh\u01b0 c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c.<\/p>\n

        MCB l\u00e0 g\u00ec v\u00e0 ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 l\u00e0 g\u00ec?<\/h3>\n

        M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a MCB l\u00e0 b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch \u0111i\u1ec7n h\u1ea1 \u00e1p c\u00f3 d\u00f2ng \u0111\u1ecbnh m\u1ee9c l\u00ean \u0111\u1ebfn 125A b\u1eb1ng c\u00e1ch ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng do qu\u00e1 t\u1ea3i (t\u00ecnh tr\u1ea1ng d\u00f2ng \u0111i\u1ec7n cao k\u00e9o d\u00e0i) ho\u1eb7c ch\u1eadp m\u1ea1ch (d\u00f2ng \u0111i\u1ec7n c\u1ef1c cao). MCB c\u00f3 m\u1ed9t b\u1ed9 ph\u1eadn nhi\u1ec7t (l\u01b0\u1ee1ng kim) \u0111\u1ec3 ph\u00e1t hi\u1ec7n t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i v\u00e0 m\u1ed9t b\u1ed9 ph\u1eadn \u0111i\u1ec7n t\u1eeb \u0111\u1ec3 ph\u00e1t hi\u1ec7n t\u00ecnh tr\u1ea1ng ng\u1eafn m\u1ea1ch, v\u1ed1n l\u00e0 m\u1ed9t s\u1ef1 c\u1ed1 x\u1ea3y ra trong m\u1ea1ch do d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i. Khi c\u00f3 b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 n\u00e0o trong m\u1ea1ch \u0111i\u1ec7n m\u00e0 MCB \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, n\u00f3 s\u1ebd t\u1ef1 \u0111\u1ed9ng ng\u1eaft v\u00e0 ng\u1eebng cung c\u1ea5p \u0111i\u1ec7n cho m\u1ea1ch b\u1ecb l\u1ed7i, t\u1eeb \u0111\u00f3 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i h\u1ecfa ho\u1ea1n v\u00e0 ng\u0103n ng\u1eeba h\u01b0 h\u1ecfng cho c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi m\u1ea1ch b\u1ecb l\u1ed7i. MCB c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i sau khi s\u1ef1 c\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c, kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u1ea7u ch\u00ec, ph\u1ea3i \u0111\u01b0\u1ee3c thay th\u1ebf khi b\u1ecb ch\u00e1y. Vi\u1ec7c ki\u1ec3m tra ho\u1eb7c hi\u1ec7u chu\u1ea9n MCB \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ed9 ph\u1eadn nhi\u1ec7t s\u1ebd ng\u1eaft \u1edf m\u1ee9c d\u00f2ng \u0111i\u1ec7n th\u00edch h\u1ee3p v\u00e0 c\u0169ng trong khung th\u1eddi gian \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n IEC 60898-1.<\/p>\n

        M\u00e1y hi\u1ec7u chu\u1ea9n MCB \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t, ph\u00f2ng th\u00ed nghi\u1ec7m ki\u1ec3m tra v\u00e0 hi\u1ec7u chu\u1ea9n, c\u0169ng nh\u01b0 c\u00e1c b\u1ed9 ph\u1eadn b\u1ea3o tr\u00ec s\u1eed d\u1ee5ng nh\u1eb1m m\u1ee5c \u0111\u00edch ki\u1ec3m tra v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c \u0111i\u1ec1u ch\u1ec9nh c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i nhi\u1ec7t c\u1ee7a MCB (c\u1ea7u dao t\u1ef1 \u0111\u1ed9ng mini). M\u00e1y hi\u1ec7u chu\u1ea9n MCB ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111\u1ed5i v\u00e0 ch\u00ednh x\u00e1c (th\u01b0\u1eddng l\u00e0 135% so v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a MCB) v\u00e0o MCB\/c\u1ea7u dao mini v\u00e0 \u0111o th\u1eddi gian c\u1ea7n thi\u1ebft \u0111\u1ec3 thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch (v\u1edbi \u0111\u1ed9 ch\u00ednh x\u00e1c r\u1ea5t cao, \u00b10.1%).<\/p>\n

        C\u00e1c m\u00e1y hi\u1ec7u chu\u1ea9n MCB c\u00f3 nhi\u1ec1u lo\u1ea1i kh\u00e1c nhau; m\u00e1y lo\u1ea1i th\u1ee7 c\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi kh\u1ed1i l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c \u00edt (v\u00ed d\u1ee5: nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n); m\u00e1y b\u00e1n t\u1ef1 \u0111\u1ed9ng (lo\u1ea1i A v\u00e0 lo\u1ea1i B) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u0103ng n\u0103ng su\u1ea5t b\u1eb1ng c\u00e1ch x\u1eed l\u00fd kh\u1ed1i l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c trung b\u00ecnh; c\u00f2n m\u00e1y lo\u1ea1i ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c, ch\u1ea1y t\u1ef1 \u0111\u1ed9ng s\u1ebd x\u1eed l\u00fd kh\u1ed1i l\u01b0\u1ee3ng c\u00f4ng vi\u1ec7c l\u1edbn.<\/p>\n

        Khi \u0111\u00e1nh gi\u00e1 lo\u1ea1i m\u00e1y hi\u1ec7u chu\u1ea9n MCB n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u c\u1ee7a b\u1ea1n, h\u00e3y xem x\u00e9t c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt sau \u0111\u00e2y. C\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt r\u1ea5t quan tr\u1ecdng c\u1ea7n xem x\u00e9t bao g\u1ed3m: D\u1ea3i d\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a (t\u1ed1i \u0111a 500A), \u0111\u1ed9 ch\u00ednh x\u00e1c r\u1ea5t cao trong vi\u1ec7c \u0111o th\u1eddi gian ng\u1eaft m\u1ea1ch, s\u1ed1 l\u01b0\u1ee3ng MCB\/l\u1ea7n hi\u1ec7u chu\u1ea9n m\u00e0 b\u1ea1n mu\u1ed1n th\u1ef1c hi\u1ec7n m\u1ed7i ng\u00e0y, v\u00e0 tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n IEC 60898-1.<\/p>\n

        Khi l\u1ef1a ch\u1ecdn M\u00e1y hi\u1ec7u chu\u1ea9n MCB<\/strong>, h\u00e3y l\u01b0u \u00fd \u0111\u1ebfn kh\u1ed1i l\u01b0\u1ee3ng s\u1ea3n xu\u1ea5t h\u00e0ng ng\u00e0y, ng\u00e2n s\u00e1ch v\u00e0 m\u1ee9c \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng h\u00f3a m\u00e0 b\u1ea1n c\u1ea7n. Vi\u1ec7c hi\u1ec7u chu\u1ea9n MCB \u0111\u00fang c\u00e1ch s\u1ebd gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng MCB s\u1ebd ng\u1eaft m\u1ea1ch khi x\u1ea3y ra t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i. Vi\u1ec7c hi\u1ec7u chu\u1ea9n \u0111\u00fang c\u00e1ch s\u1ebd b\u1ea3o v\u1ec7 c\u1ea3 thi\u1ebft b\u1ecb l\u1eabn nh\u00e2n vi\u00ean.<\/p>","protected":false},"excerpt":{"rendered":"

        Real production headache: During the final testing phase, we were rejecting 8% of our MCBs due to thermal trip drift. The reason for the issue with the MCB’s circuit was that the calibration bench that we were using did not hold stable current for time periods greater than 30 minutes. There was no way to […]<\/p>\n","protected":false},"author":1,"featured_media":532,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-531","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/531","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/comments?post=531"}],"version-history":[{"count":1,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/531\/revisions"}],"predecessor-version":[{"id":534,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/531\/revisions\/534"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/532"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=531"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=531"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=531"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}