{"id":514,"date":"2026-06-06T20:59:50","date_gmt":"2026-06-06T20:59:50","guid":{"rendered":"https:\/\/khkrh7q1ur.wpdns.site\/?p=514"},"modified":"2026-06-06T20:59:52","modified_gmt":"2026-06-06T20:59:52","slug":"circuit-breaker-test-for-optimal-electrical-safety","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/circuit-breaker-test-for-optimal-electrical-safety\/","title":{"rendered":"C\u00e1ch ki\u1ec3m tra c\u1ea7u dao \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111i\u1ec7n t\u1ed1i \u01b0u"},"content":{"rendered":"

S\u1ef1 c\u1ed1 an to\u00e0n th\u1ef1c t\u1ebf:<\/strong> S\u1ef1 c\u1ed1 an to\u00e0n th\u1ef1c t\u1ebf: \u201cM\u1ed9t c\u1ea7u dao MCCB 100A t\u1ea1i nh\u00e0 m\u00e1y \u0111\u00e3 kh\u00f4ng ng\u1eaft m\u1ea1ch khi x\u1ea3y ra s\u1ef1 c\u1ed1 ng\u1eafn m\u1ea1ch. B\u1ea3ng \u0111i\u1ec7n ph\u00eda h\u1ea1 l\u01b0u \u0111\u00e3 ph\u00e1t n\u1ed5 v\u00e0 khi\u1ebfn m\u1ed9t th\u1ee3 \u0111i\u1ec7n b\u1ecb th\u01b0\u01a1ng do c\u1ea7u dao n\u00e0y ch\u01b0a \u0111\u01b0\u1ee3c ki\u1ec3m tra trong t\u00e1m n\u0103m; c\u01a1 ch\u1ebf ng\u1eaft nhi\u1ec7t \u0111\u00e3 b\u1ecb k\u1eb9t do s\u1eed d\u1ee5ng trong th\u1eddi gian d\u00e0i.\u201d \u2013 Tr\u01b0\u1edfng b\u1ed9 ph\u1eadn b\u1ea3o tr\u00ec, nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p [\u2026]<\/p><\/blockquote>\n

A ki\u1ec3m tra c\u1ea7u dao<\/strong><\/a> bao g\u1ed3m nhi\u1ec1u h\u00e0nh \u0111\u1ed9ng ki\u1ec3m tra ri\u00eang l\u1ebb t\u1eeb m\u1ed9t b\u00e0i ki\u1ec3m tra \u201cnh\u1ea5p\u201d c\u01a1 b\u1ea3n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean n\u00fat nh\u1ea5n b\u00ean trong c\u1ee7a c\u1ea7u dao, \u0111\u1ebfn vi\u1ec7c x\u00e1c minh d\u00f2ng \u0111i\u1ec7n ch\u00ednh \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 th\u1eddi gian ng\u1eaft v\u00e0 hi\u1ec7u chu\u1ea9n. Ki\u1ec3m tra c\u1ea7u dao \u0111\u1ea3m b\u1ea3o r\u1eb1ng C\u1ea7u dao Miniature (MCB), C\u1ea7u dao v\u1ecf \u0111\u00fac (MCCB) v\u00e0 C\u1ea7u dao kh\u00f4ng kh\u00ed (ACB) c\u1ee7a b\u1ea1n s\u1ebd ho\u1ea1t \u0111\u1ed9ng trong ph\u1ea1m vi \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n \u0111\u00e3 c\u00f4ng b\u1ed1, do \u0111\u00f3 tr\u00e1nh \u0111\u01b0\u1ee3c nguy c\u01a1 ch\u00e1y (nhi\u1ec7t), tia h\u1ed3 quang (\u0111i\u1ec7n) v\u00e0\/ho\u1eb7c h\u01b0 h\u1ea1i thi\u1ebft b\u1ecb xung quanh. C\u00f3 ba c\u1ea5p \u0111\u1ed9 ki\u1ec3m tra trong h\u01b0\u1edbng d\u1eabn n\u00e0y: ki\u1ec3m tra c\u01a1 b\u1ea3n t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, ki\u1ec3m tra trung gian d\u1ef1a tr\u00ean thi\u1ebft b\u1ecb v\u00e0 ki\u1ec3m tra x\u00e1c nh\u1eadn d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t n\u00e2ng cao; b\u1ea1n s\u1ebd h\u1ecdc c\u00e1ch th\u1ef1c hi\u1ec7n t\u1eebng ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra, c\u00e1c thi\u1ebft b\u1ecb ki\u1ec3m tra c\u1ea7n thi\u1ebft v\u00e0 t\u1ea7n su\u1ea5t th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m:<\/h2>\n
    \n
  • C\u1ea5p \u0111\u1ed9 1: Ki\u1ec3m tra c\u01a1 b\u1ea3n t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng (ng\u1eaft th\u1ee7 c\u00f4ng, ki\u1ec3m tra \u0111i\u1ec7n \u00e1p, ki\u1ec3m tra nhi\u1ec7t)<\/li>\n
  • C\u1ea5p \u0111\u1ed9 2: Ki\u1ec3m tra trung gian (\u0111o \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n, \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac, x\u00e1c minh ng\u1eaft t\u1eeb t\u00ednh)<\/li>\n
  • Ki\u1ec3m tra s\u1ea3n xu\u1ea5t h\u1ea1ng nh\u1ea5t (v\u00ed d\u1ee5: ti\u00eam d\u00f2ng \u0111i\u1ec7n ch\u00ednh, \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n, ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n b\u1ed9 \u0111i\u1ec1u ch\u1ec9nh).<\/li>\n
  • C\u00e1ch l\u1ef1a ch\u1ecdn gi\u1eefa thi\u1ebft b\u1ecb ki\u1ec3m tra th\u1ee7 c\u00f4ng, di \u0111\u1ed9ng v\u00e0 t\u1ef1 \u0111\u1ed9ng<\/li>\n
  • T\u1ea7n su\u1ea5t ki\u1ec3m tra \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb d\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n IEEE\/NEMA<\/li>\n
  • C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p \u0111\u01b0\u1ee3c tr\u1ea3 l\u1eddi b\u1edfi c\u00e1c k\u1ef9 s\u01b0 \u0111i\u1ec7n (bao g\u1ed3m c\u00e2u h\u1ecfi v\u1ec1 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n Bryant)<\/li>\n<\/ul>\n

    \"C\u00e1ch<\/p>\n

    C\u1ea5p \u0111\u1ed9 1: Ki\u1ec3m tra c\u01a1 b\u1ea3n t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng (kh\u00f4ng c\u1ea7n c\u00f4ng c\u1ee5 \u0111\u1eb7c bi\u1ec7t)<\/h2>\n

    \u0110\u1ec3 ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 c\u00e1c c\u1ea7u dao \u0111\u00e3 l\u1eafp \u0111\u1eb7t, b\u1eaft \u0111\u1ea7u v\u1edbi c\u00e1c b\u00e0i ki\u1ec3m tra kh\u00f4ng x\u00e2m l\u1ea5n n\u00e0y.<\/p>\n

    1 B\u00e0i ki\u1ec3m tra nh\u1ea5n \u0111\u1ec3 ng\u1eaft (ho\u1eb7c \u201ct\u1eadp luy\u1ec7n\u201d)<\/h3>\n

    M\u1ed9t n\u00fat ng\u1eaft th\u1ee7 c\u00f4ng \u0111\u01b0\u1ee3c ghi nh\u00e3n \u201cT\u201d ho\u1eb7c \u201cPUSH TO TRIP\u201d c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y tr\u00ean m\u1ed7i c\u1ea7u dao v\u1ecf \u0111\u00fac (MCB\/MCCB). \u0110\u1ec3 ki\u1ec3m tra t\u1eebng c\u1ea7u dao, \u0111\u1eb7t n\u00f3 \u1edf v\u1ecb tr\u00ed B\u1eacT v\u00e0 nh\u1ea5n n\u00fat ng\u1eaft th\u1ee7 c\u00f4ng; c\u1ea7u dao s\u1ebd t\u1ef1 \u0111\u1ed9ng chuy\u1ec3n sang v\u1ecb tr\u00ed T\u1eaeT\/NG\u1eaeT. \u0110i\u1ec1u n\u00e0y s\u1ebd x\u00e1c nh\u1eadn r\u1eb1ng li\u00ean k\u1ebft c\u01a1 h\u1ecdc b\u00ean trong c\u1ea7u dao ho\u1ea1t \u0111\u1ed9ng t\u1ef1 do v\u00e0 c\u01a1 ch\u1ebf ng\u1eaft nhi\u1ec7t \u0111i\u1ec7n t\u1eed\/bimetal ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c. M\u1ed7i MCB\/MCCB n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra \u00edt nh\u1ea5t h\u00e0ng n\u0103m; vi\u1ec7c n\u00e0y kh\u00f4ng t\u1ed1n chi ph\u00ed nh\u01b0ng c\u00f3 th\u1ec3 gi\u00fap ng\u0103n ng\u1eeba c\u00e1c v\u1ea5n \u0111\u1ec1 trong t\u01b0\u01a1ng lai b\u1eb1ng c\u00e1ch ph\u00e1t hi\u1ec7n c\u00e1c c\u01a1 ch\u1ebf b\u1ecb k\u1eb9t tr\u01b0\u1edbc khi ch\u00fang tr\u1edf th\u00e0nh v\u1ea5n \u0111\u1ec1.<\/p>\n

    2 Ki\u1ec3m tra b\u1eb1ng m\u1eaft v\u00e0 ki\u1ec3m tra nhi\u1ec7t<\/h3>\n

    Ki\u1ec3m tra c\u00e1c d\u1ea5u hi\u1ec7u qu\u00e1 nhi\u1ec7t, bao g\u1ed3m \u0111\u1ea7u n\u1ed1i b\u1ecb h\u01b0 h\u1ea1i (thay \u0111\u1ed5i m\u00e0u s\u1eafc), v\u1ecf b\u1ecb ch\u1ea3y ho\u1eb7c m\u00f9i b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng nhi\u1ec7t k\u1ebf h\u1ed3ng ngo\u1ea1i ho\u1eb7c thi\u1ebft b\u1ecb ch\u1ee5p \u1ea3nh nhi\u1ec7t \u0111\u1ec3 \u0111o nhi\u1ec7t \u0111\u1ed9 b\u1ec1 m\u1eb7t c\u1ee7a c\u1ea7u dao khi n\u00f3 \u0111ang t\u1ea3i. N\u1ebfu c\u1ea7u dao n\u00f3ng h\u01a1n 60\u00b0C \u1edf t\u1ea3i \u0111\u1ecbnh m\u1ee9c l\u1edbn h\u01a1n 80%, c\u1ea7u dao c\u00f3 th\u1ec3 c\u00f3 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n tr\u1edf cao ho\u1eb7c h\u01b0 h\u1ecfng b\u00ean trong.<\/p>\n

    3 Ki\u1ec3m tra s\u1ef1 hi\u1ec7n di\u1ec7n \u0111i\u1ec7n \u00e1p (an to\u00e0n l\u00e0 tr\u00ean h\u1ebft)<\/h3>\n

    \u0110\u1ec3 ki\u1ec3m tra r\u1eb1ng c\u1ea3 ph\u00eda ngu\u1ed3n \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n v\u00e0 ph\u00eda t\u1ea3i kh\u00f4ng c\u00f3 \u0111i\u1ec7n (khi c\u1ea7u dao \u1edf v\u1ecb tr\u00ed T\u1eaeT), s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb ki\u1ec3m tra \u0111i\u1ec7n \u00e1p kh\u00f4ng ti\u1ebfp x\u00fac. \u0110i\u1ec1u n\u00e0y kh\u00f4ng x\u00e1c minh hi\u1ec7u su\u1ea5t ng\u1eaft, nh\u01b0ng x\u00e1c minh r\u1eb1ng vi\u1ec7c chuy\u1ec3n m\u1ea1ch c\u01a1 b\u1ea3n di\u1ec5n ra nh\u01b0 mong \u0111\u1ee3i.<\/p>\n

    C\u1ea5p \u0111\u1ed9 2: Ki\u1ec3m tra trung gian (s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb di \u0111\u1ed9ng)<\/h2>\n

    Khi b\u1ea1n nghi ng\u1edd c\u00f3 v\u1ea5n \u0111\u1ec1 ho\u1eb7c th\u1ef1c hi\u1ec7n b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba (m\u1ed7i 1 \u0111\u1ebfn 3 n\u0103m), vi\u1ec7c ki\u1ec3m tra n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng, m\u00e1y \u0111o c\u00e1ch \u0111i\u1ec7n v\u00e0 m\u00e1y \u0111o micro ohm.<\/p>\n

    1 Ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n<\/h3>\n

    M\u1ee5c \u0111\u00edch:<\/strong> Ph\u00e1t hi\u1ec7n \u0111\u1ed9 \u1ea9m, d\u1ea5u v\u1ebft cacbon ho\u1eb7c s\u1ef1 nhi\u1ec5m b\u1ea9n b\u00ean trong b\u1ed9 ng\u1eaft m\u1ea1ch.<\/p>\n

    Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> V\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch \u1edf v\u1ecb tr\u00ed \u2018T\u1eaeT\u2019, \u0111o \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n t\u1eeb ph\u00eda d\u00e2y ngu\u1ed3n \u0111\u1ebfn ph\u00eda t\u1ea3i b\u1eb1ng megger \u0111\u1eb7t \u1edf 500V cho b\u1ed9 ng\u1eaft c\u00f3 \u0111i\u1ec7n \u00e1p 250V tr\u1edf xu\u1ed1ng ho\u1eb7c 1000V cho b\u1ed9 ng\u1eaft c\u00f3 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c l\u1edbn h\u01a1n 250V. \u0110o l\u01b0\u1eddng n\u00e0y n\u00ean cho k\u1ebft qu\u1ea3 \u00edt nh\u1ea5t 100 Megohm \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n (M\u03a9). Khi b\u1ed9 ng\u1eaft \u1edf v\u1ecb tr\u00ed \u2018B\u1eacT\u2019, th\u1ef1c hi\u1ec7n th\u00eam c\u00e1c ph\u00e9p \u0111o \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n gi\u1eefa c\u00e1c c\u1ef1c v\u00e0 \u0111\u1ebfn \u0111\u1ea5t. N\u1ebfu k\u1ebft qu\u1ea3 c\u1ee7a b\u1ea1n nh\u1ecf h\u01a1n 1 M\u03a9, \u0111i\u1ec1u n\u00e0y cho th\u1ea5y b\u1ed9 ng\u1eaft b\u1ecb l\u1ed7i.<\/p>\n

    2 Ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac (milliohm)<\/h3>\n

    M\u1ee5c \u0111\u00edch:<\/strong> X\u00e1c minh r\u1eb1ng c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u00f3 \u0111i\u1ec7n tr\u1edf th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh khi \u0111\u00f3ng.<\/p>\n

    Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> \u0110\u1ec3 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac MCCB, s\u1eed d\u1ee5ng \u0111\u1ed3ng h\u1ed3 \u0111o \u0111i\u1ec7n tr\u1edf th\u1ea5p k\u1ef9 thu\u1eadt s\u1ed1 (micro-ohmmeter) c\u00f3 kh\u1ea3 n\u0103ng cung c\u1ea5p d\u00f2ng \u0111i\u1ec7n DC th\u1eed nghi\u1ec7m \u00edt nh\u1ea5t 10A. Ti\u00eam d\u00f2ng \u0111i\u1ec7n t\u1eeb ph\u00eda d\u00e2y ngu\u1ed3n \u0111\u1ebfn ph\u00eda t\u1ea3i v\u00e0 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n \u00e1p tr\u00ean c\u00e1c ti\u1ebfp \u0111i\u1ec3m. C\u00e1c gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf (\u2126) sau \u0111\u00e2y \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn d\u1ef1a tr\u00ean \u0111i\u1ec1u ki\u1ec7n ti\u00eau chu\u1ea9n; <50\u00b5\u2126 cho ti\u1ebfp \u0111i\u1ec3m MCCB m\u1edbi, v\u00e0 <200\u00b5\u2126 cho ti\u1ebfp \u0111i\u1ec3m MCCB \u0111\u00e3 s\u1eed d\u1ee5ng nh\u01b0ng v\u1eabn c\u00f2n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c. \u0110\u1ecdc \u0111i\u1ec7n tr\u1edf cao ho\u1eb7c dao \u0111\u1ed9ng s\u1ebd cho th\u1ea5y b\u1ec1 m\u1eb7t ti\u1ebfp \u0111i\u1ec3m b\u1ecb m\u00f2n ho\u1eb7c c\u00f3 k\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo gi\u1eefa c\u00e1c d\u00e2y d\u1eabn.<\/p>\n

    3 X\u00e1c minh ng\u1eaft t\u1eeb t\u00ednh (ti\u00eam th\u1ee9 c\u1ea5p)<\/h3>\n

    M\u1ee5c \u0111\u00edch:<\/strong> \u0110\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n t\u1eed, x\u00e1c minh r\u1eb1ng b\u1ed9 ph\u1eadn ng\u1eaft ph\u1ea3n \u1ee9ng v\u1edbi d\u00f2ng qu\u00e1 t\u1ea3i m\u00f4 ph\u1ecfng.<\/p>\n

    Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> B\u1ed9 ki\u1ec3m tra ti\u00eam th\u1ee9 c\u1ea5p s\u1ebd ti\u00eam t\u00edn hi\u1ec7u d\u00f2ng \u0111i\u1ec7n th\u1ea5p v\u00e0o m\u1ea1ch \u0111i\u1ec7n t\u1eed c\u1ee7a b\u1ed9 ph\u1eadn ng\u1eaft. N\u00f3 s\u1ebd kh\u00f4ng ti\u00eam tr\u1ef1c ti\u1ebfp v\u00e0o \u0111\u01b0\u1eddng \u0111i\u1ec7n ch\u00ednh c\u1ee7a b\u1ed9 ph\u1eadn ng\u1eaft. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y s\u1ebd ki\u1ec3m tra t\u1ea5t c\u1ea3 c\u00e1c c\u1ea3m bi\u1ebfn, b\u1ed9 vi x\u1eed l\u00fd v\u00e0 cu\u1ed9n solenoid ng\u1eaft. B\u1ed9 ki\u1ec3m tra ti\u00eam th\u1ee9 c\u1ea5p hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n h\u01a1n b\u1ed9 ki\u1ec3m tra ti\u00eam s\u01a1 c\u1ea5p nh\u01b0ng kh\u00f4ng ki\u1ec3m tra c\u00e1c ti\u1ebfp \u0111i\u1ec3m ngu\u1ed3n.<\/p>\n

    C\u1ea5p \u0111\u1ed9 3: Ki\u1ec3m tra ti\u00eam s\u01a1 c\u1ea5p n\u00e2ng cao trong s\u1ea3n xu\u1ea5t v\u00e0 hi\u1ec7n tr\u01b0\u1eddng<\/h2>\n

    \u0110\u1ed1i v\u1edbi c\u1ea3 b\u1ed9 ng\u1eaft m\u1edbi (s\u1ea3n xu\u1ea5t) v\u00e0 b\u1ed9 ng\u1eaft c\u00f3 gi\u00e1 tr\u1ecb cao hi\u1ec7n c\u00f3 (v\u00ed d\u1ee5: trung t\u00e2m d\u1eef li\u1ec7u, b\u1ec7nh vi\u1ec7n), th\u1ef1c hi\u1ec7n ki\u1ec3m tra ti\u00eam s\u01a1 c\u1ea5p ho\u00e0n ch\u1ec9nh theo h\u01b0\u1edbng d\u1eabn c\u1ee7a ti\u00eau chu\u1ea9n IEC 60947-2 ho\u1eb7c NEMA AB-4.<\/p>\n

    1 Ki\u1ec3m tra ti\u00eam d\u00f2ng s\u01a1 c\u1ea5p<\/h3>\n

    M\u1ee5c \u0111\u00edch:<\/strong> X\u00e1c minh th\u1eddi gian ng\u1eaft th\u1ef1c t\u1ebf \u1edf nhi\u1ec1u m\u1ee9c d\u00f2ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch.<\/p>\n

    Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> K\u1ebft n\u1ed1i b\u1ed9 ki\u1ec3m tra ti\u00eam d\u00f2ng (v\u00ed d\u1ee5: 1000A-10,000A) v\u1edbi c\u1ea3 hai \u0111\u1ea7u d\u00e2y ngu\u1ed3n v\u00e0 t\u1ea3i c\u1ee7a b\u1ed9 ng\u1eaft. \u0110\u00f3ng b\u1ed9 ng\u1eaft; ti\u00eam d\u00f2ng \u0111i\u1ec7n cao qua n\u00f3 v\u00e0 \u0111o th\u1eddi gian ng\u1eaft. C\u0169ng ki\u1ec3m tra hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ec7 th\u1ed1ng d\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 t\u1eeb c\u00e1c b\u00e0i ki\u1ec3m tra tr\u01b0\u1edbc \u0111\u00f3 cho m\u1ea1ch c\u1ee5 th\u1ec3 \u0111\u00f3. V\u00ed d\u1ee5 c\u00e1c b\u00e0i ki\u1ec3m tra bao g\u1ed3m:<\/p>\n

      \n
    • 100% c\u1ee7a d\u00f2ng \u0111\u1ecbnh m\u1ee9c<\/span> \u2013 kh\u00f4ng \u0111\u01b0\u1ee3c ng\u1eaft trong v\u00f2ng 1 gi\u1edd.<\/li>\n
    • 135% cho ng\u1eaft nhi\u1ec7t<\/span> \u2013 ph\u1ea3i ng\u1eaft trong v\u00f2ng 1 gi\u1edd (\u0111\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft \u0111i\u1ec7n \u00e1p th\u1ea5p).<\/li>\n
    • 3x \u0111\u1ebfn 10x cho ng\u1eaft t\u1eeb t\u00ednh\/ng\u1eaft t\u1ee9c th\u1eddi<\/span> \u2013 th\u1eddi gian ng\u1eaft th\u01b0\u1eddng <100ms.<\/li>\n<\/ul>\n

      K\u1ebft qu\u1ea3 \u0111\u1ea1t\/kh\u00f4ng \u0111\u1ea1t l\u00e0 ch\u01b0a \u0111\u1ee7; ghi l\u1ea1i th\u1eddi gian ng\u1eaft th\u1ef1c t\u1ebf.<\/p>\n

      2 Ki\u1ec3m tra ch\u1ecbu \u0111i\u1ec7n \u00e1p c\u00e1ch \u0111i\u1ec7n (hi-pot)<\/h3>\n

      M\u1ee5c \u0111\u00edch:<\/strong> X\u00e1c minh \u0111\u1ed9 b\u1ec1n c\u00e1ch \u0111i\u1ec7n sau khi th\u1eed d\u00f2ng \u0111i\u1ec7n cao.<\/p>\n

      Ph\u01b0\u01a1ng ph\u00e1p:<\/strong> M\u1ed8T V\u00c0 M\u1ed8T N\u1eecA L\u1ea6N \u0110I\u1ec6N \u00c1P TR\u00caN C\u1ef0C \u0110I\u1ec6N \u0110\u1ea0T ~1000 V\u00d4LT TRONG 1 PH\u00daT, V\u00c0 KH\u00d4NG PH\u00c1T HI\u1ec6N CH\u1ea4M \u0110I\u1ec6N NH\u1ea4P NH\u00c1Y V\u00c0\/HO\u1eb6C R\u00d2 R\u1ec8 V\u1edaI \u2265 10 MA \u2013 M\u1ed8T \u0110\u01a0N V\u1eca CUNG C\u1ea4P \u0110I\u1ec6N (AC).<\/p>\n

      3 Ki\u1ec3m tra d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng<\/h3>\n

      Vi\u1ec7c c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t s\u1ea3n xu\u1ea5t h\u00e0ng ngh\u00ecn c\u1ea7u dao m\u1ed7i ng\u00e0y m\u00e0 ki\u1ec3m tra th\u1ee7 c\u00f4ng t\u1eebng c\u1ea7u dao l\u00e0 kh\u00f4ng th\u1ef1c t\u1ebf. V\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb ki\u1ec3m tra c\u1ea7u dao t\u1ef1 \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u00e2y chuy\u1ec1n ki\u1ec3m tra MCB t\u1ef1 \u0111\u1ed9ng ho\u1eb7c b\u00e0n ki\u1ec3m tra MCCB, s\u1ebd c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac, ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n, ki\u1ec3m tra ng\u1eaft nhi\u1ec7t\/t\u1eeb, ki\u1ec3m tra hi-pot, v.v., tr\u00ean m\u1ed7i c\u1ea7u dao trong 2-5 gi\u00e2y, \u0111\u1ed3ng th\u1eddi ghi l\u1ea1i d\u1eef li\u1ec7u trong qu\u00e1 tr\u00ecnh th\u1ef1c hi\u1ec7n. C\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng ph\u00e2n lo\u1ea1i k\u1ebft qu\u1ea3 \u0111\u1ea1t ho\u1eb7c kh\u00f4ng \u0111\u1ea1t c\u1ee7a t\u1eebng c\u1ea7u dao v\u00e0 t\u1ea3i l\u00ean MES.<\/p>\n

      \"Ki\u1ec3m<\/p>\n

      Bao l\u00e2u n\u00ean ki\u1ec3m tra c\u1ea7u dao m\u1ed9t l\u1ea7n?<\/h2>\n

      D\u1ef1a tr\u00ean ti\u00eau chu\u1ea9n IEEE Std 1458\u20112017 v\u00e0 h\u01b0\u1edbng d\u1eabn NEMA AB\u20114:<\/p>\n

        \n
      • MCB d\u00e2n d\u1ee5ng<\/strong>: Kh\u00f4ng y\u00eau c\u1ea7u ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 (thay th\u1ebf sau m\u1ed7i 20\u201130 n\u0103m).<\/li>\n
      • MCCB th\u01b0\u01a1ng m\u1ea1i \/ c\u00f4ng nghi\u1ec7p<\/strong>: M\u1ed7i 1\u20113 n\u0103m<\/span> v\u1edbi thi\u1ebft b\u1ecb c\u1ea7m tay; ki\u1ec3m tra d\u00f2ng s\u01a1 c\u1ea5p m\u1ed7i 3\u20115 n\u0103m.<\/li>\n
      • C\u01a1 s\u1edf quan tr\u1ecdng (b\u1ec7nh vi\u1ec7n, trung t\u00e2m d\u1eef li\u1ec7u)<\/strong>: H\u00e0ng n\u0103m cho t\u1ea5t c\u1ea3 c\u1ea7u dao >100A.<\/li>\n
      • C\u1ea7u dao m\u1edbi (nh\u00e0 s\u1ea3n xu\u1ea5t)<\/strong>: Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 100% (nhi\u1ec7t\/t\u1eeb\/hi-pot) + ki\u1ec3m tra lo\u1ea1i theo IEC.<\/li>\n<\/ul>\n

        C\u00f4ng c\u1ee5 v\u00e0 thi\u1ebft b\u1ecb \u0111\u1ec3 ki\u1ec3m tra c\u1ea7u dao<\/h2>\n

        D\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 ki\u1ec3m tra c\u1ee7a b\u1ea1n, b\u1ea1n s\u1ebd c\u1ea7n:<\/p>\n

          \n
        • C\u01a1 b\u1ea3n:<\/strong> M\u00e1y ki\u1ec3m tra \u0111i\u1ec7n \u00e1p kh\u00f4ng ti\u1ebfp x\u00fac, nhi\u1ec7t k\u1ebf h\u1ed3ng ngo\u1ea1i.<\/li>\n
        • Trung c\u1ea5p:<\/strong> \u0110\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng k\u1ef9 thu\u1eadt s\u1ed1, megohmmeter (m\u00e1y ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n), micro-ohmmeter (DLRO).<\/li>\n
        • N\u00e2ng cao (hi\u1ec7n tr\u01b0\u1eddng):<\/strong> B\u1ed9 ki\u1ec3m tra d\u00f2ng s\u01a1 c\u1ea5p (c\u1ea7m tay, 200\u201110,000A).<\/li>\n
        • S\u1ea3n xu\u1ea5t (nh\u00e0 m\u00e1y):<\/strong> B\u00e0n ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng tr\u00ean d\u00e2y chuy\u1ec1n (v\u00ed d\u1ee5, D\u00e2y chuy\u1ec1n ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng MCB<\/strong>, Bu\u1ed3ng th\u1eed nghi\u1ec7m MCCB<\/strong>).<\/li>\n<\/ul>\n

          Ph\u1ea1m vi gi\u00e1: $50\u2013$500 cho \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng; $200\u2013$800 cho megohmmeter; $1,500\u2013$5,000 cho micro-ohmmeter; $8,000\u201330,000 cho b\u1ed9 ki\u1ec3m tra d\u00f2ng s\u01a1 c\u1ea5p c\u1ea7m tay; v\u00e0 $50,000\u2013$200,000 cho b\u00e0n ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng.<\/p>\n

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

          C\u00e1ch ki\u1ec3m tra m\u1ed9t c\u1ea7u dao?<\/h3>\n

          B\u1eaft \u0111\u1ea7u b\u1eb1ng n\u00fat \u201cNh\u1ea5n \u0111\u1ec3 ng\u1eaft\u201d, sau \u0111\u00f3 ti\u1ebfn h\u00e0nh ki\u1ec3m tra k\u1ef9 h\u01a1n qua 3 giai \u0111o\u1ea1n (ki\u1ec3m tra kh\u1ea3 n\u0103ng m\u1edf m\u1ea1ch \u2212 t\u1ee9c l\u00e0 ng\u1eaft). S\u1eed d\u1ee5ng c\u00e1c giai \u0111o\u1ea1n sau: 1) C\u01a1 b\u1ea3n (Ki\u1ec3m tra b\u1eb1ng m\u1eaft & Ng\u1eaft th\u1ee7 c\u00f4ng), 2) Trung c\u1ea5p (Ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n & \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac b\u1eb1ng \u0111\u1ed3ng h\u1ed3 Ohm\/Megger) v\u00e0 3) N\u00e2ng cao (Ki\u1ec3m tra d\u00f2ng s\u01a1 c\u1ea5p). \u0110eo PPE (k\u00ednh b\u1ea3o h\u1ed9 v\u00e0 g\u0103ng tay c\u00e1ch \u0111i\u1ec7n) v\u00e0 ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n tr\u01b0\u1edbc khi m\u1edf n\u1eafp.<\/p>\n

          L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra c\u1ea7u dao?<\/h3>\n

          Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra thay \u0111\u1ed5i t\u00f9y theo thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng. Ng\u1eaft k\u1ebft n\u1ed1i b\u1ed9 ng\u1eaft m\u1ea1ch kh\u1ecfi t\u1ea3i \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p v\u00e0 k\u1ebft n\u1ed1i b\u1ed9 th\u1eed d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p; \u0111\u00f3ng b\u1ed9 ng\u1eaft m\u1ea1ch; sau \u0111\u00f3 t\u0103ng d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p cho \u0111\u1ebfn khi \u0111\u1ea1t gi\u00e1 tr\u1ecb ki\u1ec3m tra mong mu\u1ed1n (v\u00ed d\u1ee5, 135% theo c\u00f4ng su\u1ea5t \u0111\u1ecbnh m\u1ee9c tr\u00ean b\u1ea3ng t\u00ean), r\u1ed3i \u0111o th\u1eddi gian ng\u1eaft v\u00e0 ghi l\u1ea1i k\u1ebft qu\u1ea3, c\u00f3 th\u1ec3 so s\u00e1nh v\u1edbi th\u1eddi gian ng\u1eaft \u0111\u1ecbnh m\u1ee9c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch tr\u00ean \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3. Thi\u1ebft b\u1ecb ki\u1ec3m tra b\u1ed9 ng\u1eaft m\u1ea1ch t\u1ef1 \u0111\u1ed9ng t\u1ef1 \u0111\u1ed9ng h\u00f3a vi\u1ec7c ki\u1ec3m tra cho c\u00e1c \u1ee9ng d\u1ee5ng d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 can thi\u1ec7p c\u1ee7a ng\u01b0\u1eddi v\u1eadn h\u00e0nh.<\/p>\n

          L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00f4i ki\u1ec3m tra xem b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 t\u1ed1t kh\u00f4ng?<\/h3>\n

          Th\u1ef1c hi\u1ec7n ba b\u00e0i ki\u1ec3m tra \u0111\u01a1n gi\u1ea3n: Th\u1ee9 nh\u1ea5t, n\u1ebfu b\u1ea1n th\u1ea5y b\u1ed9 ng\u1eaft m\u1ea1ch ng\u1eaft khi nh\u1ea5n n\u00fat ki\u1ec3m tra. Th\u1ee9 hai, \u0111o \u0111i\u1ec7n \u00e1p tr\u00ean c\u1ea3 hai ph\u00eda t\u1ea3i v\u00e0 d\u00e2y ngu\u1ed3n khi b\u1ed9 ng\u1eaft m\u1ea1ch b\u1eadt v\u00e0 ph\u00eda t\u1ea3i \u1edf 0 volt khi b\u1ed9 ng\u1eaft m\u1ea1ch t\u1eaft. Th\u1ee9 ba, \u0111o \u0111i\u1ec7n tr\u1edf c\u1ee7a c\u00e1c ti\u1ebfp \u0111i\u1ec3m b\u1eb1ng \u0111\u1ed3ng h\u1ed3 v\u1ea1n n\u0103ng khi th\u00e1o b\u1ed9 ng\u1eaft m\u1ea1ch ra (t\u1ee9c l\u00e0, ti\u1ebfp \u0111i\u1ec3m \u0111\u00f3ng n\u00ean \u0111\u1ecdc 100 M\u03a9) v\u00e0 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp \u0111i\u1ec3m (<100 \u00b5\u03a9 \u0111\u1ed1i v\u1edbi MCCB).<\/p>\n

          B\u1ed9 ng\u1eaft m\u1ea1ch n\u00e0o ph\u00f9 h\u1ee3p v\u1edbi b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n Bryant?<\/h3>\n

          B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n Bryant c\u1ee7a Eaton (tr\u01b0\u1edbc \u0111\u00e2y g\u1ecdi l\u00e0 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n Bryant) \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf t\u01b0\u01a1ng th\u00edch v\u1edbi d\u00f2ng b\u1ed9 ng\u1eaft m\u1ea1ch Eaton BR c\u1ee7a h\u1ecd. M\u1ed9t s\u1ed1 b\u1ea3ng Bryant c\u0169 h\u01a1n c\u00f3 th\u1ec3 t\u01b0\u01a1ng th\u00edch v\u1edbi thi\u1ebft b\u1ecb Cutler-Hammer (d\u00f2ng t\u01b0\u01a1ng t\u1ef1 c\u0169ng s\u1ebd ho\u1ea1t \u0111\u1ed9ng). Ch\u1ec9 s\u1eed d\u1ee5ng b\u1ed9 ng\u1eaft m\u1ea1ch Siemens, Square D (QO) ho\u1eb7c GE n\u1ebfu ch\u00fang \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea r\u00f5 r\u00e0ng tr\u00ean nh\u00e3n c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u2013 b\u1ed9 ng\u1eaft kh\u00f4ng ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang, c\u00f3 th\u1ec3 g\u00e2y h\u1ed3 quang ho\u1eb7c g\u00e2y ch\u00e1y. N\u1ebfu b\u1ea1n c\u00f3 th\u1eafc m\u1eafc, h\u00e3y li\u00ean h\u1ec7 v\u1edbi th\u1ee3 \u0111i\u1ec7n c\u00f3 gi\u1ea5y ph\u00e9p \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3.<\/p>\n

          L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra b\u1ed9 ng\u1eaft m\u1ea1ch?<\/h3>\n

          B\u1ea1n c\u00f3 ba l\u1ef1a ch\u1ecdn:<\/p>\n

            \n
          1. T\u1ef1 ki\u1ec3m tra c\u01a1 b\u1ea3n<\/strong> (nh\u1ea5n \u0111\u1ec3 ng\u1eaft, ki\u1ec3m tra \u0111i\u1ec7n \u00e1p) \u2013 mi\u1ec5n ph\u00ed v\u00e0 nhanh ch\u00f3ng.<\/li>\n
          2. Thu\u00ea c\u00f4ng ty ki\u1ec3m tra \u0111i\u1ec7n<\/strong> H\u1ecd cung c\u1ea5p b\u1ed9 th\u1eed d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p di \u0111\u1ed9ng k\u00e8m b\u00e1o c\u00e1o cho m\u1ed7i b\u1ed9 ng\u1eaft \u0111\u01b0\u1ee3c ki\u1ec3m tra. Gi\u00e1 dao \u0111\u1ed9ng t\u1eeb $150 \u2013 $500 t\u00f9y theo k\u00edch th\u01b0\u1edbc v\u00e0 kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn.<\/li>\n
          3. G\u1eedi b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ebfn ph\u00f2ng th\u00ed nghi\u1ec7m \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn NETA<\/strong> \u0110\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft \u0111i\u1ec7n \u00e1p cao ho\u1eb7c b\u1ed9 ng\u1eaft quan tr\u1ecdng, h\u1ecd th\u1ef1c hi\u1ec7n ki\u1ec3m tra v\u00e0 t\u00e2n trang ho\u00e0n ch\u1ec9nh. Chi ph\u00ed: $500 \u2013 $2,000 cho MCCB.<\/li>\n<\/ol>\n

            Gi\u1ea3i ph\u00e1p cho c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t l\u00e0 tri\u1ec3n khai d\u00e2y chuy\u1ec1n ki\u1ec3m tra b\u1ed9 ng\u1eaft t\u1ef1 \u0111\u1ed9ng t\u00edch h\u1ee3p trong quy tr\u00ecnh s\u1ea3n xu\u1ea5t \u0111\u1ec3 ki\u1ec3m tra 100% t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch m\u1edbi s\u1ea3n xu\u1ea5t v\u1edbi chi ph\u00ed th\u1ea5p nh\u1ea5t c\u00f3 th\u1ec3 tr\u00ean m\u1ed7i \u0111\u01a1n v\u1ecb.<\/p>\n

            Ki\u1ec3m tra c\u1ea7u dao l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 quan tr\u1ecdng c\u1ee7a an to\u00e0n \u0111i\u1ec7n, nh\u01b0ng m\u1ee9c \u0111\u1ed9 v\u00e0 lo\u1ea1i ki\u1ec3m tra b\u1ea1n th\u1ef1c hi\u1ec7n n\u00ean d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 r\u1ee7i ro c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ea1n l\u00e0 ch\u1ee7 nh\u00e0, m\u1ed9t n\u00fat nh\u1ea5n \u0111\u1ec3 ng\u1eaft v\u00e0 ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng l\u00e0 \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u1ea7u dao c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch. C\u00e1c qu\u1ea3n l\u00fd c\u01a1 s\u1edf n\u00ean th\u1ef1c hi\u1ec7n c\u00e1c lo\u1ea1i ki\u1ec3m tra trung gian (\u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n & \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac) m\u1ed7i 1-3 n\u0103m \u0111\u1ec3 ph\u00e1t hi\u1ec7n h\u1ea7u h\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n v\u1edbi c\u1ea7u dao. C\u01a1 s\u1edf h\u1ea1 t\u1ea7ng quan tr\u1ecdng & nh\u00e0 s\u1ea3n xu\u1ea5t n\u00ean c\u00f3 ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n ch\u00ednh (t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng\/ho\u1eb7c tr\u00ean d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n th\u1ef1c s\u1ef1 t\u1eeb c\u1ea7u dao. Ch\u1ec9 v\u00ec c\u1ea7u dao v\u01b0\u1ee3t qua ki\u1ec3m tra ng\u1eaft th\u1ee7 c\u00f4ng kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 n\u00f3 s\u1ebd kh\u00f4ng b\u1ecb h\u1ecfng d\u01b0\u1edbi d\u00f2ng l\u1ed7i cao; do \u0111\u00f3, ch\u1ec9 c\u00f3 ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n ch\u00ednh ho\u1eb7c m\u00e1y ki\u1ec3m tra ch\u1ea5t l\u01b0\u1ee3ng c\u1ea7u dao s\u1ea3n xu\u1ea5t m\u1edbi c\u00f3 th\u1ec3 cung c\u1ea5p s\u1ef1 tin c\u1eady v\u1ec1 kh\u1ea3 n\u0103ng ng\u1eaft. H\u00e3y ch\u1eafc ch\u1eafn \u0111\u1ea7u t\u01b0 v\u00e0o m\u1ee9c \u0111\u1ed9 ki\u1ec3m tra ph\u00f9 h\u1ee3p v\u00e0 lu\u00f4n tu\u00e2n th\u1ee7 quy tr\u00ecnh kh\u00f3a an to\u00e0n\/tagout \u0111\u00fang c\u00e1ch.<\/p>","protected":false},"excerpt":{"rendered":"

            Real safety incident: \u201cA factory\u2019s 100A MCCB failed to trip when a short circuit occurred. The downstream panel exploded and injured an electrician as a result of the breaker not having been tested in eight years; the thermal mechanism was stuck in place from the long term usage of it.” \u2013 Maintenance manager, industrial plant […]<\/p>\n","protected":false},"author":1,"featured_media":515,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-514","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\/514","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=514"}],"version-history":[{"count":1,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/514\/revisions"}],"predecessor-version":[{"id":517,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/514\/revisions\/517"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/515"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=514"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}