{"id":482,"date":"2026-06-06T18:22:04","date_gmt":"2026-06-06T18:22:04","guid":{"rendered":"https:\/\/khkrh7q1ur.wpdns.site\/?p=482"},"modified":"2026-06-06T18:22:05","modified_gmt":"2026-06-06T18:22:05","slug":"2025-guide-effectively-test-vcb-breaker-testing-machines","status":"publish","type":"post","link":"https:\/\/benlongkj.com\/vi\/blog\/2025-guide-effectively-test-vcb-breaker-testing-machines\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn n\u0103m 2025: L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra hi\u1ec7u qu\u1ea3 c\u00e1c m\u00e1y th\u1eed nghi\u1ec7m c\u1ea7u dao VCB?"},"content":{"rendered":"

Chi ph\u00ed do s\u1ef1 c\u1ed1 t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng:<\/strong> M\u1ed9t s\u1ef1 r\u00f2 r\u1ec9 ch\u00e2n kh\u00f4ng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n tr\u00ean m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng (VCB) 24 kV \u0111\u00e3 d\u1eabn \u0111\u1ebfn vi\u1ec7c kh\u00f4ng th\u1ec3 ng\u1eaft m\u1ea1ch ng\u1eafn. S\u1ef1 c\u1ed1 m\u1ea5t \u0111i\u1ec7n t\u1ea1i tr\u1ea1m bi\u1ebfn \u00e1p n\u00e0y \u0111\u00e3 g\u00e2y thi\u1ec7t h\u1ea1i cho c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c c\u1ee7a ch\u00fang t\u00f4i h\u01a1n 1.420.000, v\u00e0 ch\u00fang t\u00f4i \u0111\u00e3 b\u1ecf s\u00f3t v\u1ea5n \u0111\u1ec1 n\u00e0y do c\u00e1c quy tr\u00ecnh ki\u1ec3m tra c\u1ee7a m\u00ecnh. \u2013 K\u1ef9 s\u01b0 b\u1ea3o tr\u00ec, c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c khu v\u1ef1c.<\/p><\/blockquote>\n

Vi\u1ec7c ki\u1ec3m tra c\u1ea7u dao VCB kh\u00f4ng gi\u1ed1ng nh\u01b0 ki\u1ec3m tra c\u1ea7u dao h\u1ea1 \u00e1p ho\u1eb7c MCB. C\u1ea7u dao VCB ho\u1ea1t \u0111\u1ed9ng \u1edf m\u1ee9c \u0111i\u1ec7n \u00e1p cao\/trung b\u00ecnh (th\u01b0\u1eddng t\u1eeb 12 kV \u0111\u1ebfn 24 kV) v\u00e0 d\u1ef1a v\u00e0o kh\u1ea3 n\u0103ng ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c c\u1ee7a b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng. V\u00e0o n\u0103m 2025, v\u1edbi vi\u1ec7c t\u1ef1 \u0111\u1ed9ng h\u00f3a m\u1ea1ng l\u01b0\u1edbi \u0111i\u1ec7n \u0111ang \u0111\u01b0\u1ee3c tri\u1ec3n khai, c\u1ea7n ph\u1ea3i c\u00f3 thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o VCB ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang c\u00e1ch, c\u00f3 th\u1ec3 ki\u1ec3m tra ch\u00ednh x\u00e1c t\u00ednh to\u00e0n v\u1eb9n ch\u00e2n kh\u00f4ng c\u1ee7a VCB, ch\u1ee9c n\u0103ng c\u01a1 h\u1ecdc, \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n v\u00e0 \u0111\u1ed9 m\u00f2n ti\u1ebfp \u0111i\u1ec3m theo ti\u00eau chu\u1ea9n IEC 62271-100. B\u00e0i vi\u1ebft n\u00e0y n\u00eau ra n\u0103m ki\u1ec3m tra ch\u00ednh m\u00e0 b\u1ea1n c\u1ea7n th\u1ef1c hi\u1ec7n \u0111\u1ec3 ki\u1ec3m tra Ki\u1ec3m tra thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch VCB<\/strong><\/a> thi\u1ebft b\u1ecb.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y bao g\u1ed3m:<\/h2>\n
    \n
  • N\u0103m b\u00e0i ki\u1ec3m tra thi\u1ebft y\u1ebfu \u0111\u1ed1i v\u1edbi m\u00e1y th\u1eed nghi\u1ec7m c\u1ea7u dao VCB (v\u00e0 c\u00e1ch th\u1ef1c hi\u1ec7n)<\/li>\n
  • C\u00e1c th\u00f4ng s\u1ed1 sau \u0111\u00e2y l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft qu\u1ea3 \u0111o ch\u00ednh x\u00e1c: m\u1ee9c ch\u00e2n kh\u00f4ng; h\u00e0nh tr\u00ecnh ti\u1ebfp x\u00fac; t\u1ed1c \u0111\u1ed9 \u0111\u00f3ng\/m\u1edf; v\u00e0 \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n.<\/li>\n
  • C\u00e1ch gi\u1ea3i th\u00edch k\u1ebft qu\u1ea3 so v\u1edbi ti\u00eau chu\u1ea9n IEC 62271-100<\/li>\n
  • Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p v\u00e0 c\u00e1ch tr\u00e1nh ch\u00fang<\/li>\n
  • C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 th\u1eed nghi\u1ec7m VCB do c\u00e1c k\u1ef9 s\u01b0 gi\u1ea3i \u0111\u00e1p<\/li>\n<\/ul>\n

    Hi\u1ec3u VCB l\u00e0 g\u00ec v\u00e0 t\u1ea1i sao vi\u1ec7c ki\u1ec3m tra l\u1ea1i quan tr\u1ecdng<\/h2>\n

    Tr\u01b0\u1edbc khi \u0111i v\u00e0o c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng VCB l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Vacuum Circuit Breaker (C\u00f4ng t\u1eafc ng\u1eaft ch\u00e2n kh\u00f4ng). C\u00f4ng t\u1eafc ng\u1eaft ch\u00e2n kh\u00f4ng \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t thi\u1ebft b\u1ecb ch\u00e2n kh\u00f4ng c\u00f3 ch\u1ee9c n\u0103ng d\u1eadp t\u1eaft h\u1ed3 quang khi c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf ra trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1. Kh\u00e1c v\u1edbi c\u1ea7u dao d\u1ea7u ho\u1eb7c c\u1ea7u dao kh\u00ed, c\u1ea7u dao ch\u00e2n kh\u00f4ng kh\u00f4ng c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng h\u1ed3 quang nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c v\u00e0 y\u00eau c\u1ea7u b\u1ea3o tr\u00ec t\u1ed1i thi\u1ec3u. Tuy nhi\u00ean, vi\u1ec7c ki\u1ec3m tra c\u1ea7u dao ch\u00e2n kh\u00f4ng l\u00e0 r\u1ea5t quan tr\u1ecdng v\u00ec m\u1ed9t l\u01b0\u1ee3ng ch\u00e2n kh\u00f4ng c\u1ef1c nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn c\u1ea7u dao ch\u00e2n kh\u00f4ng kh\u00f4ng th\u1ec3 ng\u1eaft m\u1ea1ch trong tr\u01b0\u1eddng h\u1ee3p s\u1ef1 c\u1ed1. C\u00f3 c\u00e1c tr\u1ea1m ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u00e0o d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 ki\u1ec3m tra C\u00f4ng t\u1eafc ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng, gi\u00fap x\u00e1c minh c\u00e1c \u0111\u1eb7c t\u00ednh n\u00e0y m\u1ed9t c\u00e1ch t\u1ef1 \u0111\u1ed9ng trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n

    \"H\u01b0\u1edbng<\/p>\n

    N\u0103m b\u00e0i ki\u1ec3m tra thi\u1ebft y\u1ebfu d\u00e0nh cho m\u00e1y th\u1eed nghi\u1ec7m c\u1ea7u dao VCB<\/h2>\n

    Ph\u1ea3i ho\u00e0n t\u1ea5t n\u0103m quy tr\u00ecnh ki\u1ec3m \u0111\u1ecbnh \u0111\u1ec3 th\u1ef1c hi\u1ec7n ki\u1ec3m tra to\u00e0n di\u1ec7n c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch (VCB). M\u1ed7i thi\u1ebft b\u1ecb ph\u1ea3i tr\u1ea3i qua c\u00e1c quy tr\u00ecnh ki\u1ec3m \u0111\u1ecbnh n\u00e0y, ho\u1eb7c sau khi t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra, ho\u1eb7c \u0111\u1ecbnh k\u1ef3 theo quy \u0111\u1ecbnh t\u1ea1i ti\u00eau chu\u1ea9n IEC 62271-100.<\/p>\n

    Ki\u1ec3m tra \u0111\u1ed9 k\u00edn ch\u00e2n kh\u00f4ng (ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9)<\/h3>\n

    Ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng:<\/span> \u00c1p su\u1ea5t c\u1ee7a b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng ph\u1ea3i nh\u1ecf h\u01a1n 1,33 \u00d7 10\u207b\u00b3 Pa \u0111\u1ec3 \u0111\u1ea1t y\u00eau c\u1ea7u ki\u1ec3m tra. Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng m\u00e1y ph\u00e1t magnetron ho\u1eb7c m\u00e1y ki\u1ec3m tra ch\u00e2n kh\u00f4ng cao \u00e1p, b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p cao (l\u00ean \u0111\u1ebfn 70 kV) v\u00e0 \u0111o d\u00f2ng ph\u00e1t x\u1ea1 qua c\u00e1c ti\u1ebfp \u0111i\u1ec3m ng\u1eaft. N\u1ebfu d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 m\u1ee9c ng\u01b0\u1ee1ng (t\u1ee9c l\u00e0 10 \u00b5A ho\u1eb7c \u00edt h\u01a1n tr\u00ean b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng 12 kV), ch\u00e2n kh\u00f4ng b\u1ecb suy gi\u1ea3m. K\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m ch\u1ec9 \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn n\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 ph\u00f3ng \u0111i\u1ec7n li\u00ean t\u1ee5c ho\u1eb7c ph\u00e1t x\u1ea1 tia X ngo\u00e0i c\u00e1c gi\u1edbi h\u1ea1n \u0111\u00e3 \u0111\u1eb7t ra.<\/p>\n

    M\u1ed9t sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p trong c\u00e1c th\u1eed nghi\u1ec7m n\u00e0y l\u00e0 kh\u00f4ng ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m \u1edf c\u1ea3 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 sau chu k\u1ef3 gia nhi\u1ec7t (n\u1ebfu c\u00f3 th\u1ec3). Vi\u1ec7c ch\u1ec9 th\u1eed nghi\u1ec7m \u1edf \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh s\u1ebd d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n

    Th\u1eed nghi\u1ec7m c\u00e1c th\u00f4ng s\u1ed1 c\u01a1 h\u1ecdc (h\u00e0nh tr\u00ecnh, t\u1ed1c \u0111\u1ed9, th\u1eddi gian)<\/h3>\n

    Ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng:<\/span> C\u00e1c lo\u1ea1i h\u00e0nh tr\u00ecnh bao g\u1ed3m h\u00e0nh tr\u00ecnh ti\u1ebfp x\u00fac (\u0111\u1ed9 d\u1eddi), h\u00e0nh tr\u00ecnh v\u01b0\u1ee3t qu\u00e1, th\u1eddi gian m\u1edf, th\u1eddi gian \u0111\u00f3ng v\u00e0 t\u1ed1c \u0111\u1ed9 trung b\u00ecnh c\u1ee7a h\u00e0nh tr\u00ecnh.
    \n\u0110\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c th\u1eed nghi\u1ec7m h\u00e0nh tr\u00ecnh: B\u1ed9 th\u1eed nghi\u1ec7m VCB s\u1ebd g\u1eafn m\u1ed9t c\u1ea3m bi\u1ebfn tuy\u1ebfn t\u00ednh v\u00e0o ti\u1ebfp \u0111i\u1ec3m chuy\u1ec3n \u0111\u1ed9ng v\u00e0 g\u1eedi l\u1ec7nh m\u1edf\/\u0111\u00f3ng c\u00f4ng t\u1eafc. K\u1ebft qu\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c ghi l\u1ea1i d\u01b0\u1edbi d\u1ea1ng c\u00e1c \u0111\u01b0\u1eddng cong. \u0110\u1ed1i v\u1edbi VCB 12 kV, b\u1ea1n n\u00ean ch\u1ea5p nh\u1eadn h\u00e0nh tr\u00ecnh ti\u1ebfp \u0111i\u1ec3m m\u1edf t\u1eeb 8\u201312 mm, th\u1eddi gian m\u1edf t\u1eeb 30\u201360 ms v\u00e0 th\u1eddi gian \u0111\u00f3ng t\u1eeb 50\u201380 ms.
    \nT\u1ea7m quan tr\u1ecdng c\u1ee7a c\u00e1c b\u00e0i ki\u1ec3m tra qu\u00e1 tr\u00ecnh \u0111\u00f3ng c\u1eaft: Vi\u1ec7c \u0111\u00f3ng c\u1eaft ch\u1eadm s\u1ebd t\u1ea1o ra n\u0103ng l\u01b0\u1ee3ng h\u1ed3 quang qu\u00e1 m\u1ee9c, trong khi \u0111\u00f3ng c\u1eaft nhanh s\u1ebd d\u1eabn \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng ti\u1ebfp \u0111i\u1ec3m b\u1ecb n\u1ea3y ho\u1eb7c d\u00ednh v\u00e0o nhau.<\/p>\n

    Th\u1eed nghi\u1ec7m c\u00e1ch \u0111i\u1ec7n cao \u00e1p (\u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng)<\/h3>\n

    Ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng:<\/span> Thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch v\u00e0 gi\u00e1 \u0111\u1ee1 c\u00e1ch \u0111i\u1ec7n h\u1ed7 tr\u1ee3 c\u00e1c th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n \u0111i\u1ec7n m\u00f4i.
    \nTh\u1ef1c hi\u1ec7n nh\u01b0 th\u1ebf n\u00e0o? \u00c1p d\u1ee5ng \u0111i\u1ec7n \u00e1p 42 kV (\u0111\u1ed1i v\u1edbi VCB 24 kV) ho\u1eb7c 28 kV (\u0111\u1ed1i v\u1edbi VCB 12 kV) trong 60 gi\u00e2y gi\u1eefa c\u00e1c ti\u1ebfp \u0111i\u1ec3m m\u1edf; gi\u1eefa m\u1ed7i c\u1ef1c v\u00e0 \u0111\u1ea5t. Kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng ph\u00f3ng \u0111i\u1ec7n ho\u1eb7c d\u00f2ng r\u00f2 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t (th\u01b0\u1eddng <2 mA). (Ghi ch\u00fa v\u1ec1 t\u1ef1 \u0111\u1ed9ng h\u00f3a: c\u00e1c thi\u1ebft b\u1ecb ki\u1ec3m tra c\u00e1ch \u0111i\u1ec7n trong d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t (nh\u01b0 trong d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t t\u1ef1 \u0111\u1ed9ng VCB) th\u1ef1c hi\u1ec7n th\u1eed nghi\u1ec7m n\u00e0y theo quy tr\u00ecnh 100% \u0111\u1ea7y \u0111\u1ee7 tr\u00ean m\u1ed7i thi\u1ebft b\u1ecb v\u00e0o cu\u1ed1i qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p.)<\/p>\n

    Th\u1eed nghi\u1ec7m \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac (\u0111i\u1ec7n tr\u1edf v\u00f2ng l\u1eb7p)<\/h3>\n

    Ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng:<\/strong> \u0110i\u1ec7n tr\u1edf m\u1ea1ch ch\u00ednh \u0111\u00f3ng t\u1eeb c\u1ef1c n\u00e0y sang c\u1ef1c kia (bao g\u1ed3m c\u1ea3 b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng). Th\u1ef1c hi\u1ec7n c\u00e1c b\u01b0\u1edbc sau: s\u1eed d\u1ee5ng m\u00e1y \u0111o \u0111i\u1ec7n tr\u1edf vi ohm (DC 50 \u2013 100A). \u0110\u1ed1i v\u1edbi VCB, \u0111i\u1ec7n tr\u1edf v\u00f2ng l\u1eb7p ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u2018m\u1edbi\u2019 th\u01b0\u1eddng ph\u1ea3i nh\u1ecf h\u01a1n 50 vi ohm v\u00e0 nh\u1ecf h\u01a1n 100 vi ohm \u0111\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111ang s\u1eed d\u1ee5ng.<\/p>\n

    Vi\u1ec7c quan s\u00e1t th\u1ea5y xu h\u01b0\u1edbng t\u0103ng c\u1ee7a \u0111i\u1ec7n tr\u1edf cho th\u1ea5y ho\u1eb7c l\u00e0 s\u1ef1 m\u00e0i m\u00f2n c\u1ee7a b\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac, ho\u1eb7c l\u00e0 s\u1ef1 l\u1ec7ch tr\u1ee5c c\u1ee7a k\u1ebft n\u1ed1i c\u01a1 kh\u00ed.<\/p>\n

    Th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc (tu\u1ed5i th\u1ecd)<\/h3>\n

    Ch\u1ec9 s\u1ed1 n\u00e0y \u0111o l\u01b0\u1eddng:<\/strong> Th\u1eed nghi\u1ec7m n\u00e0y \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb trong vi\u1ec7c ch\u1ecbu \u0111\u1ef1ng nhi\u1ec1u l\u1ea7n thao t\u00e1c c\u01a1 h\u1ecdc m\u00e0 kh\u00f4ng b\u1ecb h\u1ecfng h\u00f3c. Ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m bao g\u1ed3m vi\u1ec7c s\u1eed d\u1ee5ng h\u1ec7 th\u1ed1ng th\u1eed nghi\u1ec7m t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n chu k\u1ef3 \u0111\u00f3ng v\u00e0 m\u1edf c\u1ea7u dao m\u1ed9t s\u1ed1 l\u1ea7n nh\u1ea5t \u0111\u1ecbnh (theo quy \u0111\u1ecbnh trong IEC 62271-100; M1 \u2013 10.000 chu k\u1ef3; M2 \u2013 30.000 chu k\u1ef3). Trong qu\u00e1 tr\u00ecnh n\u00e0y, h\u1ec7 th\u1ed1ng th\u1eed nghi\u1ec7m \u0111o l\u01b0\u1eddng c\u00e1c th\u00f4ng s\u1ed1 sau: th\u1eddi gian m\u1edf, th\u1eddi gian \u0111\u00f3ng v\u00e0 m\u1ee9c \u0111\u1ed9 m\u00e0i m\u00f2n c\u1ee7a c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch. Khi m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m 10.000 l\u1ea7n, th\u1eddi gian m\u1edf c\u1ee7a n\u00f3 d\u1ef1 ki\u1ebfn s\u1ebd t\u0103ng \u00edt h\u01a1n 5%.<\/p>\n

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

    C\u00e1ch ch\u1ecdn v\u00e0 ki\u1ec3m \u0111\u1ecbnh m\u00e1y th\u1eed ng\u1eaft m\u1ea1ch VCB<\/h2>\n

    Khi \u0111\u00e1nh gi\u00e1 vi\u1ec7c l\u1ef1a ch\u1ecdn m\u00e1y ki\u1ec3m tra ng\u1eaft m\u1ea1ch, c\u1ea7n xem x\u00e9t c\u00e1c t\u00ednh n\u0103ng sau \u0111\u00e2y \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o ph\u00f9 h\u1ee3p khi s\u1eed d\u1ee5ng v\u1edbi c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch van (VCB) trong m\u00f4i tr\u01b0\u1eddng s\u1ea3n xu\u1ea5t ho\u1eb7c trong c\u00f4ng t\u00e1c b\u1ea3o tr\u00ec t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng:<\/p>\n

      \n
    • D\u00f2ng m\u00e1y ki\u1ec3m tra ch\u00e2n kh\u00f4ng:<\/strong> Ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n \u00e1p su\u1ea5t >1\u00d710\u207b\u00b2 Pa (r\u00f2 r\u1ec9) v\u00e0 <1\u00d710\u207b\u2074 Pa (b\u00ecnh th\u01b0\u1eddng).<\/li>\n
    • \u0110\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a c\u1ea3m bi\u1ebfn d\u1ecbch chuy\u1ec3n:<\/strong> \u2264\u00b10,1 mm \u0111\u1ed1i v\u1edbi ph\u00e9p \u0111o h\u00e0nh tr\u00ecnh.<\/li>\n
    • Kh\u1ea3 n\u0103ng ch\u1ecbu \u0111i\u1ec7n \u00e1p:<\/strong> \u00cdt nh\u1ea5t 70 kV \u0111\u1ed1i v\u1edbi c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng (VCB) 12\u201324 kV.<\/li>\n
    • Ghi d\u1eef li\u1ec7u:<\/strong> N\u00ean l\u01b0u tr\u1eef c\u00e1c \u0111\u01b0\u1eddng cong cho t\u1eebng l\u1ea7n th\u1eed nghi\u1ec7m v\u00e0 xu\u1ea5t sang \u0111\u1ecbnh d\u1ea1ng CSV ho\u1eb7c tr\u1ef1c ti\u1ebfp sang h\u1ec7 th\u1ed1ng MES.<\/li>\n
    • Tu\u00e2n th\u1ee7:<\/strong> \u0110\u01b0\u1ee3c ch\u1ebf t\u1ea1o theo Ph\u1ee5 l\u1ee5c c\u1ee7a ti\u00eau chu\u1ea9n IEC 62271-100 (h\u01b0\u1edbng d\u1eabn th\u1eed nghi\u1ec7m).<\/li>\n<\/ul>\n

      Theo Benlong Automation, d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t c\u1ee7a h\u1ecd k\u1ebft h\u1ee3p c\u00e1c b\u00e0i ki\u1ec3m tra n\u00eau tr\u00ean th\u00e0nh m\u1ed9t quy tr\u00ecnh li\u1ec1n m\u1ea1ch duy nh\u1ea5t v\u00e0 \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng (VCB) \u0111\u1ec1u \u0111\u00e3 \u0111\u01b0\u1ee3c ki\u1ec3m tra t\u1ef1 \u0111\u1ed9ng theo ti\u00eau chu\u1ea9n 100% tr\u01b0\u1edbc khi xu\u1ea5t x\u01b0\u1edfng.<\/p>\n

      Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p trong ki\u1ec3m th\u1eed VCB v\u00e0 c\u00e1ch kh\u1eafc ph\u1ee5c<\/h2>\n
        \n
      • Sai l\u1ea7m 1: Vi\u1ec7c ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a h\u1ec7 th\u1ed1ng ch\u00e2n kh\u00f4ng b\u1eb1ng m\u00e1y \u0111o \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n (megger) truy\u1ec1n th\u1ed1ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y \u0111o \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n (c\u00f2n g\u1ecdi l\u00e0 megger). Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea3i thi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y ki\u1ec3m tra ch\u00e2n kh\u00f4ng chuy\u00ean d\u1ee5ng, \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p cao (AC ho\u1eb7c DC) v\u00e0o c\u00e1c ti\u1ebfp \u0111i\u1ec3m h\u1edf thay v\u00ec n\u1ed1i \u0111\u1ea5t.<\/li>\n
      • Sai l\u1ea7m 2: Kh\u00f4ng ghi l\u1ea1i \u0111\u1ed3 th\u1ecb chuy\u1ec3n \u0111\u1ed9ng ti\u1ebfp x\u00fac: Ch\u1ec9 m\u1ed9t gi\u00e1 tr\u1ecb \u201c\u0111\u1ed9 d\u1ed1c\u201d l\u00e0 ch\u01b0a \u0111\u1ee7. B\u1ea1n n\u00ean lu\u00f4n ghi l\u1ea1i to\u00e0n b\u1ed9 \u0111\u1ed3 th\u1ecb chuy\u1ec3n \u0111\u1ed9ng theo th\u1eddi gian, v\u00ec \u0111i\u1ec1u n\u00e0y gi\u00fap b\u1ea1n nh\u1eadn bi\u1ebft hi\u1ec7n t\u01b0\u1ee3ng n\u1ea3y, v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n v\u00e0 dao \u0111\u1ed9ng ti\u1ebfp x\u00fac.<\/li>\n
      • Sai l\u1ea7m th\u1ee9 3:<\/strong> Kh\u00f4ng t\u00ednh \u0111\u1ebfn s\u1ef1 \u0111i\u1ec1u ch\u1ec9nh nhi\u1ec7t \u0111\u1ed9 \u0111\u1ed1i v\u1edbi \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac. \u0110\u1ed1i v\u1edbi \u0111\u1ed3ng, \u0111i\u1ec7n tr\u1edf thay \u0111\u1ed5i 0,41 TP3T tr\u00ean m\u1ed7i \u0111\u1ed9 C. Gi\u1ea3i ph\u00e1p: \u0110o nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh gi\u00e1 tr\u1ecb v\u1ec1 \u0111i\u1ec3m tham chi\u1ebfu 20 \u0111\u1ed9 C.<\/li>\n<\/ul>\n

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

        B\u00e0i ki\u1ec3m tra VCB l\u00e0 g\u00ec?<\/h3>\n

        B\u00e0i ki\u1ec3m tra VCB<\/strong> \u0110\u00e2y l\u00e0 b\u1ed9 l\u1ecbch tr\u00ecnh th\u1eed nghi\u1ec7m ki\u1ec3m tra \u0111i\u1ec7n v\u00e0 c\u01a1 kh\u00ed \u0111\u1ea7y \u0111\u1ee7 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u00ean m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng nh\u1eb1m x\u00e1c nh\u1eadn kh\u1ea3 n\u0103ng ng\u1eaft an to\u00e0n d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 v\u00e0 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a thi\u1ebft b\u1ecb. B\u1ed9 th\u1eed nghi\u1ec7m n\u00e0y bao g\u1ed3m b\u1ed1n b\u00e0i ki\u1ec3m tra: ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n ch\u00e2n kh\u00f4ng (ph\u00e1t hi\u1ec7n r\u00f2 r\u1ec9 kh\u00ed), ki\u1ec3m tra \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111\u1ef1ng c\u00e1ch \u0111i\u1ec7n, \u0111o \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac v\u00e0 c\u00e1c b\u00e0i ki\u1ec3m tra \u0111\u1eb7c t\u00ednh c\u01a1 kh\u00ed (th\u1eddi gian \u0111\u00f3ng\/m\u1edf, h\u00e0nh tr\u00ecnh, t\u1ed1c \u0111\u1ed9). C\u00e1c th\u1eed nghi\u1ec7m n\u00e0y \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh trong ti\u00eau chu\u1ea9n IEC 62271-100, l\u00e0 y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c trong th\u1eed nghi\u1ec7m ki\u1ec3u lo\u1ea1i v\u00e0 th\u01b0\u1eddng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n nh\u01b0 c\u00e1c th\u1eed nghi\u1ec7m \u0111\u1ecbnh k\u1ef3 trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n

        VCB \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/h3>\n

        Vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ch\u00e2n kh\u00f4ng (VCB) trong vi\u1ec7c \u0111i\u1ec1u khi\u1ec3n v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch \u0111i\u1ec7n trung th\u1ebf (MV) c\u00f3 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a 40,5 kV ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng cho c\u00e1c m\u1ee5c \u0111\u00edch sau: (1) H\u1ec7 th\u1ed1ng ph\u00e2n ph\u1ed1i ch\u00ednh trong c\u00e1c nh\u00e0 m\u00e1y c\u00f4ng nghi\u1ec7p (2) Thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft li\u00ean quan \u0111\u1ebfn tr\u1ea1m bi\u1ebfn \u00e1p c\u00f4ng c\u1ed9ng (3) H\u1ec7 th\u1ed1ng \u0111i\u1ec7n kh\u00ed h\u00f3a \u0111\u01b0\u1eddng s\u1eaft (25 kV AC) (4) M\u00e1y ph\u00e1t \u0111i\u1ec7n tuabin gi\u00f3 (5) Ng\u00e2n h\u00e0ng t\u1ee5 \u0111i\u1ec7n. S\u1ef1 \u01b0a chu\u1ed9ng \u0111\u1ed1i v\u1edbi VCB xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u1eb7c t\u00ednh kh\u00f4ng c\u1ea7n b\u1ea3o tr\u00ec (t\u1ee9c l\u00e0 kh\u00f4ng d\u00f9ng d\u1ea7u, kh\u00f4ng d\u00f9ng SF6), tu\u1ed5i th\u1ecd \u0111i\u1ec7n c\u1ef1c l\u1edbn (th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng) (30.000 chu k\u1ef3) v\u00e0 \u0111\u1ed9 tin c\u1eady cao.<\/p>\n

        L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra VCB?<\/h3>\n

        \u0110\u1ec3 ki\u1ec3m tra VCB, b\u1ea1n c\u1ea7n m\u1ed9t thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng Ki\u1ec3m tra c\u1ea7u dao<\/strong> b\u1ed9. Quy tr\u00ecnh t\u1eebng b\u01b0\u1edbc nh\u01b0 sau:<\/p>\n

          \n
        1. Ng\u1eaft k\u1ebft n\u1ed1i VCB v\u00e0 x\u1ea3 h\u1ebft \u0111i\u1ec7n t\u00edch t\u1ee5 \u0111i\u1ec7n (tu\u00e2n th\u1ee7 quy tr\u00ecnh kh\u00f3a\/d\u00e1n nh\u00e3n).<\/li>\n
        2. Ti\u1ebfn h\u00e0nh ki\u1ec3m tra b\u1eb1ng m\u1eaft th\u01b0\u1eddng \u0111\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c v\u1ebft n\u1ee9t tr\u00ean v\u1ecf th\u1ee7y tinh ho\u1eb7c g\u1ed1m c\u1ee7a b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng.<\/li>\n
        3. Ti\u1ebfn h\u00e0nh ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n ch\u00e2n kh\u00f4ng b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb ki\u1ec3m tra cao \u00e1p c\u00f3 trang b\u1ecb magnetron; c\u1ea5p \u0111i\u1ec7n \u00e1p cao h\u01a1n qua c\u00e1c \u0111i\u1ec3m ti\u1ebfp x\u00fac v\u00e0 theo d\u00f5i b\u1ea5t k\u1ef3 hi\u1ec7n t\u01b0\u1ee3ng r\u00f2 r\u1ec9 n\u00e0o.<\/li>\n
        4. \u0110o \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac b\u1eb1ng \u0111\u1ed3ng h\u1ed3 \u0111o \u0111i\u1ec7n tr\u1edf vi-ohm (50\u2013100 A DC).<\/li>\n
        5. Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m v\u1eadn h\u00e0nh c\u01a1 h\u1ecdc b\u1eb1ng c\u00e1ch ghi l\u1ea1i t\u1ed5ng th\u1eddi gian m\u1edf, t\u1ed5ng th\u1eddi gian \u0111\u00f3ng, h\u00e0nh tr\u00ecnh v\u00e0 t\u1ed1c \u0111\u1ed9 trung b\u00ecnh v\u1edbi s\u1ef1 h\u1ed7 tr\u1ee3 c\u1ee7a c\u1ea3m bi\u1ebfn h\u00e0nh tr\u00ecnh.<\/li>\n
        6. Ti\u1ebfn h\u00e0nh th\u1eed nghi\u1ec7m c\u00e1ch \u0111i\u1ec7n cao \u00e1p (t\u1ee9c l\u00e0 th\u1eed nghi\u1ec7m ch\u1ecbu \u0111i\u1ec7n \u00e1p t\u1ea7n s\u1ed1 c\u00f4ng nghi\u1ec7p) gi\u1eefa hai pha c\u0169ng nh\u01b0 gi\u1eefa pha v\u00e0 \u0111\u1ea5t.<\/li>\n<\/ol>\n

          T\u1ea5t c\u1ea3 c\u00e1c k\u1ebft qu\u1ea3 ph\u1ea3i \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi b\u1ea3ng th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c c\u00e1c ti\u00eau ch\u00ed ch\u1ea5p nh\u1eadn theo ti\u00eau chu\u1ea9n IEC 62271-100.<\/p>\n

          VCB l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb g\u00ec trong l\u0129nh v\u1ef1c \u0111i\u1ec7n?<\/h3>\n

          K\u1ef9 thu\u1eadt \u0111i\u1ec7n bao g\u1ed3m c\u00e1c thu\u1eadt ng\u1eef nh\u01b0 VCB, vi\u1ebft t\u1eaft c\u1ee7a \u201cVacuum Circuit Breakers\u201d (c\u1ea7u dao ch\u00e2n kh\u00f4ng). C\u1ea7u dao ch\u00e2n kh\u00f4ng \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 c\u00f3 th\u1ec3 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n r\u1ea5t nhanh trong tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra s\u1ef1 c\u1ed1, t\u1eeb \u0111\u00f3 gi\u00fap ng\u0103n ng\u1eeba \u0111\u01b0\u1eddng d\u00e2y ho\u1eb7c thi\u1ebft b\u1ecb \u0111i\u1ec7n b\u1ecb h\u01b0 h\u1ecfng do qu\u00e1 d\u00f2ng. Trong c\u00e1c thi\u1ebft b\u1ecb n\u00e0y, c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng l\u00e0 s\u1eed d\u1ee5ng v\u1ecf g\u1ed1m ho\u1eb7c th\u1ee7y tinh \u0111\u1ec3 ch\u1ee9a hai b\u1ed9 ti\u1ebfp \u0111i\u1ec3m ri\u00eang bi\u1ec7t (ti\u1ebfp \u0111i\u1ec3m \u201cc\u1ed1 \u0111\u1ecbnh\u201d v\u00e0 ti\u1ebfp \u0111i\u1ec3m \u201cdi chuy\u1ec3n\u201d); khi c\u00e1c ti\u1ebfp \u0111i\u1ec3m b\u1ecb t\u00e1ch ra do s\u1ef1 t\u00edch t\u1ee5 \u0111i\u1ec7n n\u0103ng ho\u1eb7c qu\u00e1 d\u00f2ng (nh\u01b0 trong v\u00ed d\u1ee5 tr\u00ean), s\u1ebd c\u00f3 m\u1ed9t h\u1ed3 quang \u0111i\u1ec7n t\u1ee9c th\u1eddi gi\u1eefa hai b\u1ed9 ti\u1ebfp \u0111i\u1ec3m v\u00e0 h\u1ed3 quang n\u00e0y s\u1ebd t\u1eaft trong v\u00f2ng v\u00e0i mili gi\u00e2y. Do \u0111\u00f3, c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n n\u00e0y chi\u1ebfm \u01b0u th\u1ebf trong c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111i\u1ec7n \u00e1p t\u1eeb 3,6 kV \u0111\u1ebfn 40,5 kV (g\u1ecdi l\u00e0 \u1ee9ng d\u1ee5ng \u201ctrung \u00e1p\u201d).<\/p>\n

          Ph\u01b0\u01a1ng ph\u00e1p \u0111\u00fang \u0111\u1eafn \u0111\u1ec3 ki\u1ec3m tra c\u00e1c b\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng (VCB) v\u00e0o n\u0103m 2025 \u0111\u00f2i h\u1ecfi ph\u1ea3i c\u00f3 m\u1ed9t quy tr\u00ecnh h\u1ec7 th\u1ed1ng nh\u1eb1m \u0111\u00e1nh gi\u00e1 to\u00e0n di\u1ec7n t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a m\u00f4i tr\u01b0\u1eddng ch\u00e2n kh\u00f4ng, c\u00e1c b\u1ed9 ph\u1eadn c\u01a1 kh\u00ed, kh\u1ea3 n\u0103ng c\u00e1ch \u0111i\u1ec7n, \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac v\u00e0 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc. T\u1ea5t c\u1ea3 c\u00e1c th\u1eed nghi\u1ec7m ph\u1ea3i s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb th\u1eed nghi\u1ec7m ph\u00f9 h\u1ee3p, bao g\u1ed3m m\u00e1y ki\u1ec3m tra ch\u00e2n kh\u00f4ng magnetron, b\u1ed9 chuy\u1ec3n \u0111\u1ed5i h\u00e0nh tr\u00ecnh, m\u00e1y \u0111o \u0111i\u1ec7n tr\u1edf vi m\u00f4 v\u00e0 b\u1ed9 cao \u00e1p, v\u1edbi k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c gi\u1ea3i th\u00edch theo ti\u00eau chu\u1ea9n IEC 62271-100. \u0110\u1ed1i v\u1edbi s\u1ea3n xu\u1ea5t h\u00e0ng lo\u1ea1t VCB, c\u00f3 c\u00e1c d\u00e2y chuy\u1ec1n th\u1eed nghi\u1ec7m ng\u1eaft m\u1ea1ch t\u00edch h\u1ee3p, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t VCB t\u1ef1 \u0111\u1ed9ng ho\u00e0n to\u00e0n m\u1edbi, t\u1ef1 \u0111\u1ed9ng h\u00f3a m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady v\u00e0 nh\u1ea5t qu\u00e1n t\u1eebng trong 5 th\u1eed nghi\u1ec7m n\u00eau tr\u00ean, \u0111\u1ea3m b\u1ea3o ki\u1ec3m tra 100% v\u00e0 kh\u1ea3 n\u0103ng truy xu\u1ea5t d\u1eef li\u1ec7u, \u0111\u1ed3ng th\u1eddi s\u1ea3n xu\u1ea5t 25-30 VCB m\u1ed7i ca l\u00e0m vi\u1ec7c h\u00e0ng ng\u00e0y. Cho d\u00f9 b\u1ea1n l\u00e0 k\u1ef9 s\u01b0 l\u00e0m vi\u1ec7c cho m\u1ed9t c\u00f4ng ty \u0111i\u1ec7n l\u1ef1c hay ch\u1ecbu tr\u00e1ch nhi\u1ec7m s\u1ea3n xu\u1ea5t v\u00e0 th\u1eed nghi\u1ec7m VCB, t\u00e0i li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c cung c\u1ea5p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng b\u1ea1n c\u00f3 th\u1ec3 ng\u0103n ch\u1eb7n nh\u1eefng h\u1eadu qu\u1ea3 t\u1ed1n k\u00e9m n\u1ebfu b\u1ea5t k\u1ef3 s\u1ef1 c\u1ed1 th\u1eed nghi\u1ec7m VCB n\u00e0o n\u00eau tr\u00ean x\u1ea3y ra.<\/p>","protected":false},"excerpt":{"rendered":"

          Field failure cost: An undetected vacuum leak on a 24KV VCB led to failure to interrupt a short circuit. This substation outage cost our utility company more than $200,000, and we missed it due to our testing procedures. \u2013 Maintenance engineer, regional utility company. Testing a VCB breaker is not the same as testing a […]<\/p>\n","protected":false},"author":1,"featured_media":485,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":["post-482","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\/482","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=482"}],"version-history":[{"count":3,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/482\/revisions"}],"predecessor-version":[{"id":489,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/posts\/482\/revisions\/489"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media\/485"}],"wp:attachment":[{"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/media?parent=482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/categories?post=482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/benlongkj.com\/vi\/wp-json\/wp\/v2\/tags?post=482"}],"curies":[{"name":"trang web","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}