{"id":496,"date":"2026-06-06T19:19:25","date_gmt":"2026-06-06T19:19:25","guid":{"rendered":"https:\/\/khkrh7q1ur.wpdns.site\/?p=496"},"modified":"2026-06-06T19:39:52","modified_gmt":"2026-06-06T19:39:52","slug":"mccb-test-bench-best-practices-for-reliable-testing","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/mccb-test-bench-best-practices-for-reliable-testing\/","title":{"rendered":"10 ph\u01b0\u01a1ng ph\u00e1p th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t cho b\u00e0n th\u1eed nghi\u1ec7m MCCB \u0111\u1ec3 ki\u1ec3m tra c\u1ea7u dao \u0111\u00e1ng tin c\u1eady"},"content":{"rendered":"

Th\u00e1ch th\u1ee9c ch\u1ea5t l\u01b0\u1ee3ng th\u1ef1c t\u1ebf:<\/strong> Theo Gi\u00e1m \u0111\u1ed1c Ch\u1ea5t l\u01b0\u1ee3ng t\u1ea1i m\u1ed9t c\u00f4ng ty x\u00e2y d\u1ef1ng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n LLC, sau khi th\u1eed nghi\u1ec7m 500 MCCB, k\u1ebft lu\u1eadn nh\u01b0 sau: \u201cCh\u00fang t\u00f4i \u0111\u00e3 v\u01b0\u1ee3t qua t\u1ea5t c\u1ea3 c\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3. Tuy nhi\u00ean, v\u1ec1 c\u00e1c l\u1ed7i ng\u1eaft nhi\u1ec7t kh\u00f4ng li\u00ean t\u1ee5c, ch\u00fang t\u00f4i \u0111\u00e3 c\u00f3 12 s\u1ea3n ph\u1ea9m b\u1ecb lo\u1ea1i b\u1ecf t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng sau khi \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t.\u201d L\u00fd do m\u00e0 t\u1ef7 l\u1ec7 l\u1ed7i ng\u1eaft nhi\u1ec7t b\u1ecb b\u1ecf s\u00f3t t\u1ea1i b\u00e0n th\u1eed nghi\u1ec7m; delta\/bi\u1ebfn th\u1ec3 kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u00ec b\u00e0i ki\u1ec3m tra ch\u1ec9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u1edf 25 \u0111\u1ed9 C.<\/p><\/blockquote>\n

M\u1ed8T Bu\u1ed3ng th\u1eed nghi\u1ec7m MCCB<\/strong><\/a> kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t tr\u1ea1m go\/no-go c\u01a1 b\u1ea3n m\u00e0 l\u00e0 m\u1ed9t tr\u1ea1m c\u00f3 tr\u00e1ch nhi\u1ec7m b\u1ed5 sung. Tr\u00e1ch nhi\u1ec7m c\u1ee7a b\u00e0n th\u1eed nghi\u1ec7m l\u00e0 ki\u1ec3m tra ch\u00ednh x\u00e1c c\u00e1c c\u1ea7u dao \u0111i\u1ec7n ki\u1ec3u kh\u1ed1i (c\u00f3 d\u1ea3i \u0111\u1ecbnh m\u1ee9c t\u1eeb 10A \u2013 1600A; kh\u1ea3 n\u0103ng ng\u1eaft l\u00ean \u0111\u1ebfn 150kA) b\u1eb1ng c\u00e1ch \u0111o ch\u00ednh x\u00e1c \u0111\u1ed9 hi\u1ec7u ch\u1ec9nh nhi\u1ec7t, ng\u01b0\u1ee1ng ng\u1eaft t\u1eeb t\u00ednh, c\u00e1ch \u0111i\u1ec7n v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc, qua nhi\u1ec1u nhi\u1ec7t \u0111\u1ed9 kh\u00e1c nhau. H\u01b0\u1edbng d\u1eabn cung c\u1ea5p 10 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u0111\u1ec3 ph\u00e2n bi\u1ec7t m\u1ed9t b\u00e0n th\u1eed nghi\u1ec7m MCCB tu\u00e2n th\u1ee7 ch\u1ea5t l\u01b0\u1ee3ng v\u1edbi m\u1ed9t b\u00e0n th\u1eed nghi\u1ec7m tu\u00e2n th\u1ee7 c\u01a1 b\u1ea3n. Nh\u1eefng th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t n\u00e0y d\u1ef1a tr\u00ean IEC 60947-2 v\u00e0 d\u1eef li\u1ec7u s\u1ea3n xu\u1ea5t t\u1eeb c\u00e1c d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m:<\/h2>\n
    \n
  • B\u1ed1n th\u1ef1c h\u00e0nh thi\u1ebft l\u1eadp tr\u01b0\u1edbc th\u1eed nghi\u1ec7m (m\u00f4i tr\u01b0\u1eddng, hi\u1ec7u chu\u1ea9n, t\u00e0i li\u1ec7u, an to\u00e0n)<\/li>\n
  • Ba th\u1ef1c h\u00e0nh ki\u1ec3m tra c\u1ed1t l\u00f5i (nhi\u1ec7t, t\u1eeb t\u00ednh, c\u00e1ch \u0111i\u1ec7n\/\u0111i\u1ec7n m\u00f4i)<\/li>\n
  • Hai th\u1ef1c h\u00e0nh cho d\u1eef li\u1ec7u & c\u1ea3i ti\u1ebfn li\u00ean t\u1ee5c<\/li>\n
  • M\u1ed9t th\u1ef1c h\u00e0nh t\u1ed5ng th\u1ec3 cho \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i<\/li>\n
  • C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 th\u1eed nghi\u1ec7m MCCB (\u0111i\u1ec7n, kh\u00f4ng ph\u1ea3i y t\u1ebf)<\/li>\n<\/ul>\n

    \"10<\/p>\n

    Th\u1ef1c h\u00e0nh thi\u1ebft l\u1eadp tr\u01b0\u1edbc th\u1eed nghi\u1ec7m (1\u20134)<\/h2>\n

    Ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng trong kho\u1ea3ng \u00b15\u00b0C<\/h3>\n

    Th\u1eed nghi\u1ec7m ng\u1eaft nhi\u1ec7t MCCB \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n v\u1edbi c\u00e1c d\u1ea3i kim lo\u1ea1i hai th\u00e0nh ph\u1ea7n s\u1eed d\u1ee5ng d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 t\u1ea1o ra nhi\u1ec7t, nh\u01b0ng t\u1ed1c \u0111\u1ed9 m\u00e0 m\u1ed9t d\u1ea3i kim lo\u1ea1i hai th\u00e0nh ph\u1ea7n ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng ch\u1ec9 ph\u1ee5 thu\u1ed9c v\u00e0o l\u01b0\u1ee3ng d\u00f2ng \u0111i\u1ec7n ch\u1ea3y m\u00e0 c\u00f2n v\u00e0o nhi\u1ec7t \u0111\u1ed9 c\u1ee7a kh\u00f4ng kh\u00ed xung quanh. M\u1ed9t b\u00e0n th\u1eed nghi\u1ec7m qu\u00e1 g\u1ea7n l\u00f2 n\u01b0\u1edbng ho\u1eb7c c\u00f3 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi chi\u1ebfu tr\u1ef1c ti\u1ebfp s\u1ebd cung c\u1ea5p d\u1eef li\u1ec7u kh\u00f4ng \u0111\u00e1ng tin c\u1eady. M\u00f4i tr\u01b0\u1eddng t\u1ed1i \u01b0u \u0111\u1ec3 th\u1eed nghi\u1ec7m c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft nhi\u1ec7t kim lo\u1ea1i hai th\u00e0nh ph\u1ea7n l\u00e0 kho\u1ea3ng nhi\u1ec7t \u0111\u1ed9 t\u1eeb 25\u00b0C \u00b15\u00b0C, v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ghi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 theo d\u00f5i nhi\u1ec7t \u0111\u1ed9 khu v\u1ef1c th\u1eed nghi\u1ec7m, v\u00e0 b\u1ea5t k\u1ef3 y\u1ebfu t\u1ed1 \u0111i\u1ec1u ch\u1ec9nh n\u00e0o \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho b\u00e0i ki\u1ec3m tra \u0111\u1ec3 t\u00ednh \u0111\u1ebfn nhi\u1ec7t \u0111\u1ed9 ngo\u00e0i kho\u1ea3ng n\u00e0y. Nhi\u1ec1u d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn c\u00f3 b\u00e0n th\u1eed nghi\u1ec7m chuy\u00ean d\u1ee5ng trong m\u1ed9t ph\u00f2ng ki\u1ec3m so\u00e1t nhi\u1ec7t \u0111\u1ed9 \u0111\u1ec3 th\u1eed nghi\u1ec7m MCCB.<\/p>\n

    Hi\u1ec7u chu\u1ea9n ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n v\u00e0 c\u1ea3m bi\u1ebfn m\u1ed7i 6 th\u00e1ng<\/h3>\n

    M\u1ed9t s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 th\u1eddi gian ng\u1eaft ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ea1o ra n\u1ebfu c\u00f3 l\u1ed7i +5% trong d\u00f2ng \u0111i\u1ec7n th\u1eed nghi\u1ec7m. B\u1ea1n ph\u1ea3i x\u00e1c minh \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a ngu\u1ed3n ti\u00eam d\u00f2ng \u0111i\u1ec7n ch\u00ednh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ampe k\u1ebf tham chi\u1ebfu c\u00f3 th\u1ec3 truy xu\u1ea5t (\u0111\u1ed9 ch\u00ednh x\u00e1c \u00b10.5%) t\u1ea1i m\u1ed9t s\u1ed1 m\u1ee5c d\u00f2ng \u0111i\u1ec7n th\u1eed nghi\u1ec7m (ch\u1eb3ng h\u1ea1n nh\u01b0 100A, 500A v\u00e0 1000A). B\u1ea1n ph\u1ea3i gi\u1eef l\u1ea1i h\u1ed3 s\u01a1 hi\u1ec7u chu\u1ea9n trong t\u1ed1i thi\u1ec3u ba n\u0103m. B\u00e0n hi\u1ec7u chu\u1ea9n nhi\u1ec7t MCCB c\u00f3 th\u1ec3 ch\u1ee9ng minh y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 ch\u00ednh x\u00e1c d\u00f2ng \u0111i\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c minh tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u b\u1ea5t k\u1ef3 c\u00f4ng vi\u1ec7c n\u00e0o.<\/p>\n

    Th\u1ef1c hi\u1ec7n quy t\u1eafc \u201ck\u1ebf ho\u1ea1ch th\u1eed nghi\u1ec7m tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m\u201d<\/h3>\n

    \u0110\u1ed1i v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i MCCB, ph\u00e1t tri\u1ec3n m\u1ed9t quy tr\u00ecnh v\u1eadn h\u00e0nh ti\u00eau chu\u1ea9n (SOP) b\u1eb1ng v\u0103n b\u1ea3n bao g\u1ed3m c\u00e1c \u0111i\u1ec1u sau:
    \nD\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n d\u00f2ng \u0111i\u1ec7n th\u1eed nghi\u1ec7m (nh\u01b0 m\u1ed9t % I).
    \nC\u00e1c kho\u1ea3ng th\u1eddi gian li\u00ean quan \u0111\u1ebfn b\u00e0i ki\u1ec3m tra.
    \nS\u1ed1 l\u1ea7n thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh trong qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m.
    \nTi\u00eau ch\u00ed \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u00e0nh c\u00f4ng ho\u1eb7c th\u1ea5t b\u1ea1i c\u1ee7a thi\u1ebft b\u1ecb.<\/p>\n

    Kh\u00f4ng th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m kh\u00e1m ph\u00e1 m\u00e0 kh\u00f4ng c\u00f3 k\u1ebf ho\u1ea1ch \u0111\u01b0\u1ee3c t\u00e0i li\u1ec7u h\u00f3a. Th\u1eed nghi\u1ec7m kh\u00e1m ph\u00e1 s\u1ebd d\u1eabn \u0111\u1ebfn c\u00e1c quy\u1ebft \u0111\u1ecbnh kh\u00f4ng chu\u1ea9n, kh\u00f4ng nh\u1ea5t qu\u00e1n. B\u00e0n th\u1eed nghi\u1ec7m MCCB Manual Magnetic Trip ph\u1ea3i c\u00f3 quy tr\u00ecnh r\u00f5 r\u00e0ng \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp cho t\u1eebng \u0111\u01b0\u1eddng cong t\u1eeb t\u00ednh (C, D v\u00e0 K).<\/p>\n

    S\u1eed d\u1ee5ng r\u00e0o c\u1ea3n v\u1eadt l\u00fd v\u00e0 v\u1ecb tr\u00ed n\u00fat d\u1eebng kh\u1ea9n c\u1ea5p<\/h3>\n

    Th\u1eed nghi\u1ec7m m\u1ed9t MCCB v\u1edbi m\u1ee9c d\u00f2ng \u0111i\u1ec7n cao v\u01b0\u1ee3t qu\u00e1 5000A c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c tia h\u1ed3 quang. H\u00e3y th\u1ef1c hi\u1ec7n c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba sau tr\u01b0\u1edbc khi ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m tr\u00ean MCCB: l\u1eafp \u0111\u1eb7t c\u00e1c t\u1ea5m ch\u1eafn polycarbonate trong su\u1ed1t xung quanh khu v\u1ef1c th\u1eed nghi\u1ec7m; cung c\u1ea5p hai (2) n\u00fat d\u1eebng kh\u1ea9n c\u1ea5p d\u1ec5 ti\u1ebfp c\u1eadn; v\u00e0 cung c\u1ea5p m\u1ed9t tr\u1ea1m kh\u00f3a\/tagout cho ngu\u1ed3n \u0111i\u1ec7n ch\u00ednh. N\u1ebfu th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean m\u1ed9t b\u00e0n t\u1ef1 \u0111\u1ed9ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u00e0n th\u1eed nghi\u1ec7m MCCB b\u00e1n t\u1ef1 \u0111\u1ed9ng v\u1edbi \u0111i\u1ec7n \u00e1p cao, h\u00e3y \u0111\u1ea3m b\u1ea3o r\u1eb1ng m\u1ea1ch th\u1eed nghi\u1ec7m v\u00e0 c\u1eeda bao b\u1ecdc \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nhau.<\/p>\n

    \"Th\u1ef1c<\/p>\n

    C\u00e1c th\u1ef1c h\u00e0nh th\u1eed nghi\u1ec7m c\u1ed1t l\u00f5i (5\u20137)<\/h2>\n

    Th\u1ef1c hi\u1ec7n hi\u1ec7u chu\u1ea9n nhi\u1ec7t \u1edf hai m\u1ee9c d\u00f2ng \u0111i\u1ec7n<\/h3>\n

    C\u1ea3 100% c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (kh\u00f4ng ng\u1eaft) v\u00e0 135% c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (ng\u1eaft trong 1 gi\u1edd) c\u1ea7n \u0111\u01b0\u1ee3c x\u00e1c minh theo IEC 60947\u20112. Tuy nhi\u00ean, h\u1ea7u h\u1ebft c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t\/b\u00e0n th\u1eed nghi\u1ec7m ch\u1ec9 x\u00e1c minh ng\u1eaft \u1edf 135%, do \u0111\u00f3 b\u1ecf l\u1ee1 s\u1ef1 tr\u00f4i hi\u1ec7u chu\u1ea9n \u1edf m\u1ee9c qu\u00e1 t\u1ea3i th\u1ea5p h\u01a1n. Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t l\u00e0 c\u0169ng ghi l\u1ea1i th\u1eddi gian ng\u1eaft \u1edf 115% v\u00e0 150%, ho\u00e0n th\u00e0nh \u0111\u1ea7y \u0111\u1ee7 c\u00e1c \u0111\u01b0\u1eddng cong th\u1eddi gian - d\u00f2ng \u0111i\u1ec7n. B\u00e0n th\u1eed nghi\u1ec7m hi\u1ec7u chu\u1ea9n th\u1eddi gian d\u00e0i (nhi\u1ec7t) c\u1ee7a MCCB \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n \u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c th\u1eed nghi\u1ec7m n\u00e0y t\u1ef1 \u0111\u1ed9ng.<\/p>\n

    Th\u1eed nghi\u1ec7m ng\u1eaft t\u1eeb t\u00ednh t\u1ea1i ranh gi\u1edbi c\u1ee7a \u0111\u01b0\u1eddng cong<\/h3>\n

    Khi th\u1eed nghi\u1ec7m m\u1ed9t MCCB c-curve (5-10x in), \u0111\u1eebng ch\u1ec9 th\u1eed nghi\u1ec7m c\u1ea7u dao \u1edf 10x in; m\u00e0 h\u00e3y th\u1eed nghi\u1ec7m \u0111\u01a1n v\u1ecb c\u1ee7a b\u1ea1n \u0111\u1ec3 t\u00ecm d\u00f2ng \u0111i\u1ec7n t\u1ed1i thi\u1ec3u g\u00e2y ra ng\u1eaft ngay l\u1eadp t\u1ee9c. C\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb l\u00e0 b\u1eaft \u0111\u1ea7u t\u1eeb 4x in v\u00e0 t\u0103ng d\u00f2ng \u0111i\u1ec7n theo t\u1eebng b\u01b0\u1edbc 0.5x cho \u0111\u1ebfn khi b\u1ea1n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n ng\u1eaft. M\u1ed9t MCCB ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch n\u00ean ng\u1eaft gi\u1eefa 5x v\u00e0 10x trong kho\u1ea3ng gi\u00e1 tr\u1ecb. N\u1ebfu b\u1ea1n ch\u1ec9 th\u1eed nghi\u1ec7m \u0111\u01a1n v\u1ecb c\u1ee7a m\u00ecnh \u1edf m\u1ed9t gi\u00e1 tr\u1ecb cao, b\u1ea1n c\u00f3 th\u1ec3 b\u1ecf l\u1ee1 m\u1ed9t \u0111\u01a1n v\u1ecb ng\u1eaft qu\u00e1 s\u1edbm (ng\u1eaft gi\u1ea3) ho\u1eb7c qu\u00e1 mu\u1ed9n (r\u1ee7i ro nguy hi\u1ec3m). N\u1ebfu c\u00f3 s\u1eb5n, h\u00e3y s\u1eed d\u1ee5ng m\u1ed9t m\u00e1y th\u1eed nghi\u1ec7m v\u1edbi t\u00ednh n\u0103ng qu\u00e9t d\u00f2ng \u0111i\u1ec7n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 ki\u1ec3m tra ch\u00ednh x\u00e1c c\u01a1 ch\u1ebf ng\u1eaft c\u1ee7a MCCB c-curve.<\/p>\n

    K\u1ebft h\u1ee3p ki\u1ec3m tra ch\u1ecbu \u0111i\u1ec7n m\u00f4i v\u1edbi ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n<\/h3>\n

    M\u1ed9t b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n m\u00f4i cao \u00e1p (th\u00f4ng th\u01b0\u1eddng g\u1ea5p 2 l\u1ea7n \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c, c\u1ed9ng th\u00eam 1.000 volt trong m\u1ed9t ph\u00fat tr\u01b0\u1edbc khi \u00e1p d\u1ee5ng \u0111i\u1ec7n) v\u00e0 m\u1ed9t b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n (IR) 500\/1.000 volt (c\u00f3 gi\u00e1 tr\u1ecb l\u1edbn h\u01a1n 100 megaohms) s\u1ebd \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u sau khi th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh. H\u1ea7u h\u1ebft c\u00e1c b\u00e0n ki\u1ec3m tra ch\u1ec9 th\u1ef1c hi\u1ec7n m\u1ed9t trong nh\u1eefng b\u00e0i ki\u1ec3m tra n\u00e0y; tuy nhi\u00ean, vi\u1ec7c th\u1ef1c hi\u1ec7n c\u1ea3 hai s\u1ebd gi\u00fap ph\u00e1t hi\u1ec7n c\u00e1c lo\u1ea1i l\u1ed7i kh\u00e1c nhau. C\u1ee5 th\u1ec3, c\u00e1c b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n m\u00f4i s\u1ebd gi\u00fap x\u00e1c \u0111\u1ecbnh s\u1ef1 theo d\u00f5i b\u1ec1 m\u1eb7t, trong khi c\u00e1c b\u00e0i ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n s\u1ebd h\u1ed7 tr\u1ee3 trong vi\u1ec7c x\u00e1c \u0111\u1ecbnh s\u1ef1 h\u1ea5p th\u1ee5 \u0111\u1ed9 \u1ea9m v\u00e0\/ho\u1eb7c \u00f4 nhi\u1ec5m b\u00ean trong. B\u00e0n ki\u1ec3m tra \u0111i\u1ec7n \u00e1p cao b\u00e1n t\u1ef1 \u0111\u1ed9ng MCCB c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n c\u1ea3 hai b\u00e0i ki\u1ec3m tra theo tr\u00ecnh t\u1ef1 t\u1ef1 \u0111\u1ed9ng.<\/p>\n

    D\u1eef li\u1ec7u & th\u1ef1c h\u00e0nh c\u1ea3i ti\u1ebfn li\u00ean t\u1ee5c (8\u20139)<\/h2>\n

    Ghi l\u1ea1i th\u1eddi gian v\u00e0 gi\u00e1 tr\u1ecb l\u1ef1c m\u1ed7i l\u1ea7n nh\u1ea3y<\/h3>\n

    M\u1ed9t ch\u1ec9 b\u00e1o ch\u1ec9 c\u00f3 pass\/fail s\u1ebd kh\u00f4ng \u0111\u1ee7. Ngo\u00e0i vi\u1ec7c ghi l\u1ea1i th\u1eddi gian th\u1ef1c hi\u1ec7n (t\u00ednh b\u1eb1ng mili gi\u00e2y ho\u1eb7c gi\u00e2y) cho m\u1ed7i b\u00e0i ki\u1ec3m tra, h\u00e3y ghi l\u1ea1i nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng v\u00e0 d\u00f2ng \u0111i\u1ec7n ki\u1ec3m tra. Theo th\u1eddi gian, \u0111\u01b0a t\u1ea5t c\u1ea3 d\u1eef li\u1ec7u n\u00e0y v\u00e0o m\u1ed9t bi\u1ec3u \u0111\u1ed3 ki\u1ec3m so\u00e1t v\u00e0 xem li\u1ec7u th\u1eddi gian nh\u1ea3y c\u00f3 t\u0103ng l\u00ean hay kh\u00f4ng (v\u00ed d\u1ee5, t\u1eeb th\u1eddi gian nh\u1ea3y ban \u0111\u1ea7u l\u00e0 28 gi\u00e2y t\u1ea1i 135% In l\u00ean 35 gi\u00e2y t\u1ea1i 135% In), sau \u0111\u00f3 hi\u1ec7u ch\u1ec9nh l\u1ea1i c\u1ea7u dao tr\u01b0\u1edbc khi c\u00f3 s\u1ea3n ph\u1ea9m b\u1ecb lo\u1ea1i b\u1ecf t\u1eeb d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t. Ph\u01b0\u01a1ng ph\u00e1p d\u1ef1 \u0111o\u00e1n n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u00ean m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng s\u1ea3n xu\u1ea5t MCCB.<\/p>\n

    L\u00ean l\u1ecbch ki\u1ec3m tra b\u00e0n ki\u1ec3m tra h\u00e0ng qu\u00fd<\/h3>\n

    B\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n b\u00e0i ki\u1ec3m tra \u201cm\u1eabu v\u00e0ng\u201d \u0111\u1ec3 x\u00e1c minh r\u1eb1ng vi\u1ec7c ki\u1ec3m tra c\u1ee7a b\u1ea1n ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. Th\u1ef1c hi\u1ec7n b\u00e0i ki\u1ec3m tra n\u00e0y tr\u00ean m\u1ed9t MCCB (c\u1ea7u dao m\u1ea1ch \u0111\u1ed9ng c\u01a1) c\u00f3 th\u1eddi gian nh\u1ea3y \u0111\u00e3 bi\u1ebft (nh\u01b0 \u0111\u01b0\u1ee3c \u0111o tr\u00ean m\u1ed9t b\u00e0n tham chi\u1ebfu). N\u1ebfu k\u1ebft qu\u1ea3 c\u1ee7a b\u1ea1n l\u1ec7ch h\u01a1n 5% so v\u1edbi c\u01a1 s\u1edf, h\u00e3y ki\u1ec3m tra m\u1ea1ch ki\u1ec3m tra, c\u1ea3m bi\u1ebfn ho\u1eb7c k\u1ebft n\u1ed1i \u0111\u1ec3 t\u00ecm l\u00fd do c\u00f3 th\u1ec3 cho s\u1ef1 kh\u00e1c bi\u1ec7t. Cu\u1ed9c ki\u1ec3m to\u00e1n gi\u00fap \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea5t k\u1ef3 s\u1ef1 tr\u00f4i d\u1ea1t n\u00e0o m\u00e0 hi\u1ec7u chu\u1ea9n \u0111\u1ecbnh k\u1ef3 c\u00f3 th\u1ec3 b\u1ecf l\u1ee1 \u0111\u1ec1u \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong qu\u00e1 tr\u00ecnh n\u00e0y. Gi\u1eef m\u1ed9t b\u1ea3ng t\u00ednh \u0111\u01a1n gi\u1ea3n v\u1ec1 k\u1ebft qu\u1ea3 ki\u1ec3m to\u00e1n.<\/p>\n

    Th\u1ef1c h\u00e0nh \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i (10)<\/h2>\n

    \u0110\u00e0o t\u1ea1o ng\u01b0\u1eddi v\u1eadn h\u00e0nh v\u1ec1 \u201ct\u1ea1i sao\u201d ch\u1ee9 kh\u00f4ng ch\u1ec9 \u201cc\u00e1ch l\u00e0m\u201d<\/h3>\n

    Nh\u1eefng ng\u01b0\u1eddi v\u1eadn h\u00e0nh bi\u1ebft l\u00fd do cho s\u1ef1 dao \u0111\u1ed9ng trong th\u1eddi gian nh\u1ea3y nhi\u1ec7t do nhi\u1ec7t \u0111\u1ed9 (v\u1eadt l\u00fd c\u1ee7a d\u1ea3i kim lo\u1ea1i hai th\u00e0nh ph\u1ea7n) v\u00e0 c\u0169ng hi\u1ec3u t\u1ea1i sao \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac l\u1ea1i quan tr\u1ecdng (sinh nhi\u1ec7t) s\u1ebd gi\u00fap \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh t\u1ed1t h\u01a1n. Ng\u01b0\u1eddi v\u1eadn h\u00e0nh n\u00ean nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o h\u00e0ng n\u0103m v\u1ec1: c\u00e1ch di\u1ec5n gi\u1ea3i c\u00e1c \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n; c\u00e1ch ph\u00e1t hi\u1ec7n c\u00e1c d\u1ea5u hi\u1ec7u cho th\u1ea5y ti\u1ebfp \u0111i\u1ec3m \u0111ang m\u00f2n; v\u00e0 nh\u1eefng g\u00ec c\u1ea7n thi\u1ebft trong ti\u00eau chu\u1ea9n IEC 60947-2. \u0110\u00e0o t\u1ea1o ch\u00e9o n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n cho t\u1ed1i thi\u1ec3u hai ng\u01b0\u1eddi v\u1eadn h\u00e0nh m\u1ed7i ca v\u00ec vi\u1ec7c ch\u1ec9 c\u00f3 m\u1ed9t ng\u01b0\u1eddi \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o s\u1ebd t\u1ea1o ra m\u1ed9t \u0111i\u1ec3m th\u1ea5t b\u1ea1i duy nh\u1ea5t.<\/p>\n

    \"Th\u1ef1c<\/p>\n

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

    Ki\u1ec3m tra MCCB l\u00e0 g\u00ec?<\/h3>\n

    M\u1ed9t b\u00e0i ki\u1ec3m tra B\u1ed9 ng\u1eaft m\u1ea1ch ki\u1ec3u khu\u00f4n (MCCB) x\u00e1c minh xem MCCB c\u00f3 ho\u1ea1t \u0111\u1ed9ng theo \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n \u0111\u00e3 c\u00f4ng b\u1ed1 c\u1ee7a n\u00f3 v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c th\u00edch h\u1ee3p hay kh\u00f4ng. C\u00e1c b\u00e0i ki\u1ec3m tra bao g\u1ed3m trong b\u1ed9 b\u00e0i ki\u1ec3m tra ho\u00e0n ch\u1ec9nh c\u1ee7a m\u1ed9t MCCB bao g\u1ed3m: hi\u1ec7u chu\u1ea9n nhi\u1ec7t (ng\u1eaft qu\u00e1 t\u1ea3i), x\u00e1c minh t\u1eeb t\u00ednh (ng\u1eaft t\u1ee9c th\u1eddi), ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac, ki\u1ec3m tra \u0111i\u1ec7n \u00e1p c\u00e1ch \u0111i\u1ec7n (ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n cao \u00e1p) v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc (s\u1ed1 l\u1ea7n ho\u1ea1t \u0111\u1ed9ng). C\u00e1c b\u00e0i ki\u1ec3m tra c\u1ea7n thi\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a trong IEC 60947-2 v\u00e0 UL 489. Thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra MCCB \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 b\u00e0n ki\u1ec3m tra MCCB, c\u00f3 th\u1ec3 thay \u0111\u1ed5i t\u1eeb b\u00e0n ki\u1ec3m tra hi\u1ec7u chu\u1ea9n th\u1ee7 c\u00f4ng \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng ho\u00e0n to\u00e0n.<\/p>\n

    T\u1ea7n su\u1ea5t ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 MCCB \u0111i\u1ec3n h\u00ecnh l\u00e0 g\u00ec?<\/h3>\n

    C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 (ki\u1ec3m tra nhi\u1ec7t, ki\u1ec3m tra t\u1eeb t\u00ednh ho\u1eb7c ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n) tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c \u0111\u01a1n v\u1ecb s\u1ea3n xu\u1ea5t \u0111\u00e3 ch\u1ebf t\u1ea1o \u2013 100%. \u0110\u1ed1i v\u1edbi c\u00e1c MCCB \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, IEEE \u0111\u1ec1 xu\u1ea5t ch\u00fang n\u00ean \u0111\u01b0\u1ee3c ki\u1ec3m tra m\u1ed7i 1 \u0111\u1ebfn 3 n\u0103m ho\u1eb7c sau m\u1ed9t s\u1ef1 ki\u1ec7n l\u1ed7i \u0111\u00e3 bi\u1ebft \u2013 Trong c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng nh\u01b0 B\u1ec7nh vi\u1ec7n v\u00e0 Trung t\u00e2m D\u1eef li\u1ec7u, n\u00ean ki\u1ec3m tra h\u00e0ng n\u0103m. H\u00e3y ch\u1eafc ch\u1eafn tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t khi \u00e1p d\u1ee5ng.<\/p>\n

    S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa ki\u1ec3m tra ti\u00eam ch\u00ednh v\u00e0 ki\u1ec3m tra ti\u00eam th\u1ee9 c\u1ea5p cho MCCB l\u00e0 g\u00ec?<\/h3>\n

    D\u00f2ng \u0111i\u1ec7n cao trong m\u1ed9t b\u00e0i ki\u1ec3m tra ti\u00eam ch\u00ednh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ec3 ki\u1ec3m tra c\u1ea3 ng\u1eaft nhi\u1ec7t v\u00e0 ng\u1eaft t\u1eeb t\u00ednh c\u00f9ng m\u1ed9t l\u00fac b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u1ea3i th\u1ef1c t\u1ebf. Vi\u1ec7c s\u1eed d\u1ee5ng b\u1ed9 ki\u1ec3m tra n\u1eb7ng c\u00f3 th\u1ec3 t\u1ea1o ra k\u1ebft qu\u1ea3 r\u1ea5t ch\u00ednh x\u00e1c nh\u01b0ng c\u00f3 th\u1ec3 t\u1ed1n k\u00e9m \u0111\u1ec3 s\u1edf h\u1eefu ho\u1eb7c thu\u00ea. B\u00e0i ki\u1ec3m tra ti\u00eam th\u1ee9 hai ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p ti\u00eam th\u1ee9 c\u1ea5p ch\u1ec9 cung c\u1ea5p d\u00f2ng \u0111i\u1ec7n (c\u00e1c lo\u1ea1i ng\u1eaft \u0111i\u1ec7n t\u1eed) cho m\u1ea1ch \u0111i\u1ec7n t\u1eed c\u1ee7a \u0111\u01a1n v\u1ecb ng\u1eaft \u0111\u1ec3 ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u1ee7a c\u1ea3m bi\u1ebfn v\u00e0 logic nh\u01b0ng kh\u00f4ng ph\u1ea3i l\u00e0 \u0111\u01b0\u1eddng d\u1eabn \u0111i\u1ec7n. Khi s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p n\u00e0y, m\u1ed9t b\u00e0n ki\u1ec3m tra v\u1edbi thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p \u0111\u1ec3 ki\u1ec3m tra MCCB ph\u1ea3i lu\u00f4n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 c\u00f3 k\u1ebft qu\u1ea3 ki\u1ec3m tra ch\u00ednh x\u00e1c.<\/p>\n

    L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n c\u1ee7a MCCB?<\/h3>\n

    Khi ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n b\u1eb1ng megohmmeter, b\u1ea1n \u00e1p d\u1ee5ng 500V DC cho m\u1ed9t MCCB c\u00f3 \u0111\u1ecbnh m\u1ee9c d\u01b0\u1edbi 250V DC ho\u1eb7c 1000V DC cho c\u00e1c MCCB c\u00f3 \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p cao h\u01a1n. Ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra l\u00e0: \u2013 \u0110o gi\u1eefa c\u00e1c \u0111\u1ea7u n\u1ed1i d\u00f2ng v\u00e0 t\u1ea3i khi c\u1ea7u dao \u0111\u00f3ng \u2013 \u0110o gi\u1eefa m\u1ed7i c\u1ef1c v\u00e0 \u0111\u1ea5t (lu\u00f4n v\u1edbi c\u1ea7u dao m\u1edf) \u2013 \u0110o qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf. M\u1ed9t MCCB kh\u1ecfe m\u1ea1nh n\u00ean c\u00f3 \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n tr\u00ean 100 megohm. Gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n d\u01b0\u1edbi 5 megohm c\u00f3 th\u1ec3 ch\u1ec9 ra \u0111\u1ed9 \u1ea9m trong c\u00e1ch \u0111i\u1ec7n, theo d\u00f5i carbon do h\u1ed3 quang, ho\u1eb7c \u00f4 nhi\u1ec5m trong c\u00e1ch \u0111i\u1ec7n. Lu\u00f4n x\u1ea3 \u0111i\u1ec7n dung sau khi ki\u1ec3m tra.<\/p>\n

    Nh\u1eefng th\u1ef1c h\u00e0nh n\u00e0y \u00e1p d\u1ee5ng nh\u01b0 th\u1ebf n\u00e0o cho b\u00e0n ki\u1ec3m tra MCCB c\u1ee7a b\u1ea1n<\/h2>\n

    M\u01b0\u1eddi th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t \u00e1p d\u1ee5ng cho c\u1ea3 b\u00e0n hi\u1ec7u chu\u1ea9n th\u1ee7 c\u00f4ng v\u00e0 m\u00e1y th\u1eed t\u1ef1 \u0111\u1ed9ng tr\u00ean d\u00e2y chuy\u1ec1n. B\u1eaft \u0111\u1ea7u b\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n b\u1ed1n \u0111i\u1ec1u \u0111\u1ea7u ti\u00ean (m\u00f4i tr\u01b0\u1eddng, hi\u1ec7u chu\u1ea9n, k\u1ebf ho\u1ea1ch th\u1eed nghi\u1ec7m v\u00e0 an to\u00e0n) \u0111\u1ec3 cung c\u1ea5p tr\u1ea3i nghi\u1ec7m hi\u1ec7u chu\u1ea9n nh\u1ea5t qu\u00e1n m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng v\u00e0 ti\u1ebft ki\u1ec7m. Ti\u1ebfn h\u00e0nh th\u1ef1c hi\u1ec7n ghi d\u1eef li\u1ec7u (th\u1ef1c h\u00e0nh #8) v\u00e0 ki\u1ec3m to\u00e1n \u0111\u1ecbnh k\u1ef3 (#9). \u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn, h\u00e3y xem x\u00e9t ph\u00e1t tri\u1ec3n m\u1ed9t b\u00e0n th\u1eed MCCB chuy\u00ean d\u1ee5ng s\u1eed d\u1ee5ng b\u00f9 nhi\u1ec7t \u0111\u1ed9 t\u1ef1 \u0111\u1ed9ng v\u00e0 t\u1ea3i d\u1eef li\u1ec7u l\u00ean MES \u0111\u1ec3 t\u00edch h\u1ee3p nh\u1eefng th\u1ef1c h\u00e0nh n\u00e0y.<\/p>\n

    Th\u00e0nh c\u00f4ng ki\u1ec3m tra MCCB<\/strong> ph\u1ee5 thu\u1ed9c v\u00e0o c\u00e1c quy tr\u00ecnh nghi\u00eam ng\u1eb7t thay v\u00ec ch\u1ec9 thi\u1ebft b\u1ecb \u0111\u1eaft ti\u1ec1n. Ki\u1ec3m so\u00e1t \u0111\u00fang nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh, hi\u1ec7u chu\u1ea9n thi\u1ebft b\u1ecb th\u01b0\u1eddng xuy\u00ean, th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra m\u1ee9c d\u00f2ng \u0111i\u1ec7n \u0111a d\u1ea1ng so v\u1edbi b\u00e0i ki\u1ec3m tra m\u1ee9c d\u00f2ng \u0111i\u1ec7n \u0111\u01a1n l\u1ebb, v\u00e0 ghi l\u1ea1i d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e2n t\u00edch xu h\u01b0\u1edbng s\u1ebd gi\u00fap \u0111\u1ea3m b\u1ea3o b\u00e0n th\u1eed MCCB c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng m\u01b0\u1eddi th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t s\u1ebd ph\u00e1t hi\u1ec7n b\u1ea5t k\u1ef3 s\u1ef1 tr\u00f4i hi\u1ec7u chu\u1ea9n s\u1edbm n\u00e0o, do \u0111\u00f3 gi\u1ea3m thi\u1ec3u s\u1ef1 c\u1ed1 t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng v\u00e0 \u0111\u00e1p \u1ee9ng ti\u00eau chu\u1ea9n IEC 60947\u20112. Ng\u01b0\u1ee3c l\u1ea1i, vi\u1ec7c b\u1ecf qua vi\u1ec7c qu\u1ea3n l\u00fd nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng ho\u1eb7c th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m \u1edf nhi\u1ec1u m\u1ee9c d\u00f2ng \u0111i\u1ec7n t\u1ea1o ra m\u1ed9t r\u1ee7i ro kh\u00f4ng \u0111\u01b0\u1ee3c ti\u1ebft l\u1ed9. \u0110\u1ea7u t\u01b0 v\u00e0o \u0111\u00e0o t\u1ea1o ng\u01b0\u1eddi v\u1eadn h\u00e0nh v\u00e0 th\u1ef1c hi\u1ec7n ki\u1ec3m to\u00e1n h\u00e0ng qu\u00fd s\u1ebd c\u00f3 t\u00e1c \u0111\u1ed9ng l\u1edbn h\u01a1n \u0111\u1ebfn danh ti\u1ebfng s\u1ea3n ph\u1ea9m c\u1ee7a c\u00f4ng ty b\u1ea1n h\u01a1n b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m \u0111\u01a1n l\u1ebb n\u00e0o.<\/p>","protected":false},"excerpt":{"rendered":"

    Real quality challenge: According to the Quality Manager at a panel building LLC the following was concluded after testing 500 MCCBs: \u201cWe passed all of them through routine tests. However, regarding thermal trip intermittent failures we had 12 reject in the field after being installed.\u201d The reason why the thermal trip fail rates were missed […]<\/p>\n","protected":false},"author":1,"featured_media":498,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-496","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\/496","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=496"}],"version-history":[{"count":2,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/496\/revisions"}],"predecessor-version":[{"id":502,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/496\/revisions\/502"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/498"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=496"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=496"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=496"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}