{"id":2914,"date":"2026-07-04T22:12:28","date_gmt":"2026-07-04T22:12:28","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=2914"},"modified":"2026-07-04T22:13:31","modified_gmt":"2026-07-04T22:13:31","slug":"how-does-a-shunt-trip-breaker-work","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/how-does-a-shunt-trip-breaker-work\/","title":{"rendered":"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t c\u1ea7u dao shunt trip l\u00e0 g\u00ec?"},"content":{"rendered":"

Trong tr\u01b0\u1eddng h\u1ee3p c\u00f2i b\u00e1o ch\u00e1y k\u00edch ho\u1ea1t trong m\u1ed9t b\u1ebfp th\u01b0\u01a1ng m\u1ea1i, kh\u00f4ng ch\u1ec9 chu\u00f4ng v\u00e0 \u0111\u00e8n nh\u1ea5p nh\u00e1y ph\u1ea3i \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t m\u00e0 van gas d\u01b0\u1edbi b\u1ebfp c\u0169ng c\u1ea7n ph\u1ea3i \u0111\u00f3ng; ngo\u00e0i ra, ngu\u1ed3n \u0111i\u1ec7n cho c\u00e1c thi\u1ebft b\u1ecb n\u1ea5u \u0103n (ch\u1ea3o chi\u00ean, b\u1ebfp n\u01b0\u1edbng v\u00e0 b\u1ebfp c\u1ea3m \u1ee9ng) c\u1ea7n \u0111\u01b0\u1ee3c c\u1eaft ngay l\u1eadp t\u1ee9c th\u00f4ng qua m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n t\u1ef1 \u0111\u1ed9ng n\u00e0o \u0111\u00f3 m\u00e0 kh\u00f4ng li\u00ean quan \u0111\u1ebfn vi\u1ec7c con ng\u01b0\u1eddi ti\u1ebfp x\u00fac v\u1edbi c\u00f4ng t\u1eafc. Thi\u1ebft b\u1ecb c\u00f3 kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n ch\u1ee9c n\u0103ng n\u00e0y \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 c\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip (ho\u1eb7c c\u1ea7u dao ng\u1eaft m\u1ea1ch trip).<\/p>\n

M\u1eb7c d\u00f9 c\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip tr\u00f4ng gi\u1ed1ng nh\u01b0 m\u1ed9t c\u1ea7u dao ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n, n\u00f3 cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i (do h\u1ecfng thi\u1ebft b\u1ecb ho\u1eb7c s\u00e9t \u0111\u00e1nh) v\u00e0 ng\u1eafn m\u1ea1ch (do d\u00e2y \u0111i\u1ec7n ch\u1ea1m v\u00e0o nhau) theo c\u00f9ng c\u00e1ch nh\u01b0 b\u1ea5t k\u1ef3 lo\u1ea1i c\u1ea7u dao ng\u1eaft m\u1ea1ch n\u00e0o kh\u00e1c. Ngo\u00e0i ch\u1ee9c n\u0103ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch, c\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c ng\u1eaft theo y\u00eau c\u1ea7u th\u00f4ng qua t\u00edn hi\u1ec7u t\u1eeb xa; do \u0111\u00f3, khi c\u00f3 ch\u00e1y trong khu v\u1ef1c \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi c\u1ea7u dao, c\u1ea7u dao s\u1ebd ng\u1eaft d\u00f2ng \u0111i\u1ec7n \u0111\u1ebfn thi\u1ebft b\u1ecb m\u00e0 n\u00f3 b\u1ea3o v\u1ec7 v\u00e0 s\u1ebd ti\u1ebfp t\u1ee5c cung c\u1ea5p s\u1ef1 b\u1ea3o v\u1ec7 n\u00e0y cho \u0111\u1ebfn khi c\u00f3 t\u00edn hi\u1ec7u t\u1eeb xa kh\u00e1c y\u00eau c\u1ea7u c\u00e1c c\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip kh\u00f4i ph\u1ee5c ngu\u1ed3n \u0111i\u1ec7n cho c\u00e1c m\u1ea1ch \u0111i\u1ec7n t\u01b0\u01a1ng \u1ee9ng. \u0110\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai tham gia thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng \u0111i\u1ec7n th\u01b0\u01a1ng m\u1ea1i, an to\u00e0n c\u00f4ng nghi\u1ec7p v\u00e0 tu\u00e2n th\u1ee7 m\u00e3 x\u00e2y d\u1ef1ng, vi\u1ec7c hi\u1ec3u c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip v\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a n\u00f3 so v\u1edbi c\u1ea7u dao ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n l\u00e0 m\u1ed9t ch\u1ee7 \u0111\u1ec1 quan tr\u1ecdng cho vi\u1ec7c h\u1ecdc t\u1eadp ho\u1eb7c ph\u00e1t tri\u1ec3n chuy\u00ean m\u00f4n c\u1ee7a b\u1ea1n.<\/p>\n

\"C\u1ea7u<\/p>\n

Nguy\u00ean l\u00fd c\u01a1 b\u1ea3n: M\u1ed9t c\u1ea7u dao ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t b\u1edfi l\u1ec7nh b\u00ean ngo\u00e0i<\/h2>\n

M\u1ed9t c\u1ea7u dao ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n s\u1ebd ng\u1eaft khi n\u00f3 v\u01b0\u1ee3t qu\u00e1 d\u00f2ng \u0111\u1ecbnh m\u1ee9c c\u1ee7a n\u00f3, ho\u1eb7c d\u1ea7n d\u1ea7n th\u00f4ng qua ch\u1ee9c n\u0103ng qu\u00e1 t\u1ea3i nhi\u1ec7t ho\u1eb7c \u0111\u1ed9t ng\u1ed9t th\u00f4ng qua ch\u1ee9c n\u0103ng ng\u1eafn m\u1ea1ch t\u1eeb t\u00ednh. Vi\u1ec7c m\u1edf (ho\u1eb7c ng\u1eaft) x\u1ea3y ra b\u00ean trong d\u1ef1a tr\u00ean c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111i\u1ec7n x\u1ea3y ra trong m\u1ea1ch. C\u1ea7u dao ng\u1eaft m\u1ea1ch shunt trip c\u00f3 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ed9c l\u1eadp b\u00ean ngo\u00e0i \u0111\u1ec3 ng\u1eaft c\u1ea7u dao b\u1eb1ng c\u00e1ch \u00e1p d\u1ee5ng \u0111i\u1ec7n \u00e1p b\u00ean ngo\u00e0i qua c\u00e1c \u0111\u1ea7u \u0111i\u1ec1u khi\u1ec3n c\u1ee7a n\u00f3. Khi \u0111i\u1ec7n \u00e1p \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng, cu\u1ed9n solenoid b\u00ean trong c\u1ea7u dao s\u1ebd k\u00edch ho\u1ea1t v\u00e0 c\u01a1 h\u1ecdc gi\u1ea3i ph\u00f3ng ch\u1ed1t ng\u1eaft gi\u1ed1ng nh\u01b0 khi c\u1ea7u dao ng\u1eaft do \u0111i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i. C\u1ea7u dao sau \u0111\u00f3 s\u1ebd m\u1edf, c\u00e1ch ly to\u00e0n b\u1ed9 ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ebfn t\u1ea3i, do \u0111\u00f3 l\u00e0m m\u1ea5t ngu\u1ed3n \u0111i\u1ec7n c\u1ee7a m\u1ea1ch \u0111\u00f3.<\/p>\n

C\u01a1 ch\u1ebf shunt trip ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb t\u1ee9c th\u1eddi, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u1ed9 truy\u1ec1n \u0111\u1ed9ng li\u00ean t\u1ee5c, v\u00e0 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn \u2014 v\u00e0i gi\u00e2y c\u1ea7n thi\u1ebft \u0111\u1ec3 k\u00edch ho\u1ea1t cu\u1ed9n d\u00e2y, ng\u1eaft m\u1ea1ch v\u00e0 ng\u1eaft ngu\u1ed3n \u0111i\u1ec1u khi\u1ec3n cung c\u1ea5p. Nhi\u1ec1u b\u1ed9 ng\u1eaft m\u1ea1ch shunt trip \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t v\u1edbi c\u00f4ng t\u1eafc c\u1eaft b\u00ean trong s\u1ebd ng\u1eaft m\u1ea1ch solenoid kh\u1ecfi cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t khi c\u01a1 ch\u1ebf b\u1ed9 ng\u1eaft \u0111\u1ea1t v\u1ecb tr\u00ed TRIP; do \u0111\u00f3 ng\u0103n cu\u1ed9n d\u00e2y b\u1ecb k\u00edch ho\u1ea1t li\u00ean t\u1ee5c, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 l\u00e0m ch\u00e1y cu\u1ed9n d\u00e2y. \u0110\u00e2y l\u00e0 m\u1ed9t y\u1ebfu t\u1ed1 thi\u1ebft k\u1ebf quan tr\u1ecdng; cu\u1ed9n d\u00e2y shunt trip kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho d\u1ecbch v\u1ee5 li\u00ean t\u1ee5c. Nhi\u1ec1u t\u00e0i li\u1ec7u tham kh\u1ea3o trong ng\u00e0nh \u2014 bao g\u1ed3m t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 nh\u00e0 ph\u00e2n ph\u1ed1i, nh\u01b0 Eandisales \u2014 cung c\u1ea5p th\u00eam th\u00f4ng tin v\u1ec1 h\u1ec7 th\u1ed1ng d\u00e2y b\u00ean trong v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 \u1ee9ng d\u1ee5ng c\u1ea7n xem x\u00e9t khi s\u1eed d\u1ee5ng b\u1ed9 ng\u1eaft m\u1ea1ch shunt trip.<\/p>\n

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

C\u00e1ch ho\u1ea1t \u0111\u1ed9ng: Chu\u1ed7i \u0111i\u1ec7n v\u00e0 c\u01a1 h\u1ecdc<\/h2>\n

M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n s\u1ebd ng\u1eaft m\u1ea1ch do qu\u00e1 t\u1ea3i g\u00e2y ra b\u1edfi d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 \u0111i qua b\u1ed9 ng\u1eaft. \u0110i\u1ec1u n\u00e0y x\u1ea3y ra theo m\u1ed9t chu\u1ed7i c\u00e1c b\u01b0\u1edbc, trong \u0111\u00f3 d\u1ea3i kim lo\u1ea1i hai l\u1edbp u\u1ed1n cong ho\u1eb7c cu\u1ed9n d\u00e2y t\u1eeb t\u00ednh k\u00e9o l\u00e0m gi\u1ea3i ph\u00f3ng ch\u1ed1t ng\u1eaft. T\u1ea1i \u0111i\u1ec3m n\u00e0y, tay c\u1ea7m b\u1ed9 ng\u1eaft chuy\u1ec3n t\u1eeb v\u1ecb tr\u00ed ON sang v\u1ecb tr\u00ed TRIP, m\u1edf c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch. \u0110\u1ec3 \u0111\u1eb7t l\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u00e3 ng\u1eaft, tr\u01b0\u1edbc ti\u00ean n\u00f3 \u0111\u01b0\u1ee3c t\u1eaft ho\u00e0n to\u00e0n (OFF) r\u1ed3i b\u1eadt l\u1ea1i (ON).<\/p>\n

Chu\u1ed7i \u0111i\u1ec7n v\u00e0 c\u01a1 h\u1ecdc \u0111\u1ec3 ng\u1eaft m\u1ed9t b\u1ed9 ng\u1eaft shunt trip kh\u00e1c v\u1edbi c\u00e1ch b\u1eaft \u0111\u1ea7u, nh\u01b0ng \u0111\u1ee7 v\u00e0 k\u1ebft th\u00fac v\u1edbi c\u00f9ng m\u1ed9t k\u1ebft qu\u1ea3 (ng\u1eaft m\u1ea1ch).<\/p>\n

    \n
  1. M\u1ed9t ti\u1ebfp \u0111i\u1ec3m th\u01b0\u1eddng m\u1edf \u0111\u00f3ng l\u1ea1i trong m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i.<\/span>\u00a0Ti\u1ebfp \u0111i\u1ec3m n\u00e0y c\u00f3 th\u1ec3 \u0111\u1ea1i di\u1ec7n cho r\u01a1le b\u1ea3ng b\u00e1o ch\u00e1y, n\u00fat d\u1eebng kh\u1ea9n c\u1ea5p, c\u1ea3m bi\u1ebfn kh\u00ed \u0111\u1ed9c ho\u1eb7c \u0111\u1ea7u ra t\u1eeb h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd t\u00f2a nh\u00e0. N\u00f3 s\u1ebd k\u1ebft n\u1ed1i cu\u1ed9n shunt trip v\u1edbi ngu\u1ed3n \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n; th\u01b0\u1eddng l\u00e0 120VAC ho\u1eb7c 24 VDC t\u00f9y theo \u0111\u00e1nh gi\u00e1 cu\u1ed9n d\u00e2y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng.<\/li>\n
  2. Cu\u1ed9n shunt trip \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n.\u00a0<\/span>Khi \u0111i\u1ec7n ch\u1ea1y qua cu\u1ed9n d\u00e2y, n\u00f3 t\u1ea1o ra t\u1eeb t\u00ednh h\u00fat m\u1ed9t ch\u1ed1t nh\u1ecf ho\u1eb7c ch\u1ed1t k\u00edch ho\u1ea1t v\u00e0o l\u00f5i cu\u1ed9n d\u00e2y. Ch\u1ed1t n\u00e0y c\u00f3 k\u1ebft n\u1ed1i v\u1eadt l\u00fd v\u1edbi c\u01a1 ch\u1ebf b\u00ean trong c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ec3 ng\u1eaft m\u1ea1ch (ch\u1ed1t c\u01a1 h\u1ecdc m\u00e0 thi\u1ebft b\u1ecb nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh s\u1ebd k\u00edch ho\u1ea1t).<\/li>\n
  3. Ch\u1ed1t k\u00edch ho\u1ea1t \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng.\u00a0<\/span>Khi ch\u1ed1t k\u00edch ho\u1ea1t va v\u00e0o thanh ng\u1eaft, ch\u1ed1t \u0111\u01b0\u1ee3c gi\u1ea3i ph\u00f3ng v\u00e0 n\u0103ng l\u01b0\u1ee3ng l\u00f2 xo d\u1ef1 tr\u1eef trong c\u01a1 ch\u1ebf b\u1ed9 ng\u1eaft t\u00e1ch c\u00e1c ti\u1ebfp \u0111i\u1ec3m ch\u00ednh. Tay c\u1ea7m b\u1ed9 ng\u1eaft sau \u0111\u00f3 tr\u1edf v\u1ec1 v\u1ecb tr\u00ed TRIP. T\u1ea1i \u0111i\u1ec3m n\u00e0y, n\u1ebfu c\u00f3 c\u00f4ng t\u1eafc ph\u1ee5 b\u00ean trong th\u00ec n\u00f3 c\u00f3 th\u1ec3 m\u1edf m\u1ea1ch solenoid \u0111\u1ec3 b\u1ea3o v\u1ec7 cu\u1ed9n d\u00e2y.<\/li>\n
  4. M\u1ea1ch \u0111i\u1ec7n \u0111\u01b0\u1ee3c ng\u1eaft n\u0103ng l\u01b0\u1ee3ng.<\/span>\u00a0T\u1ea3i b\u1ecb ng\u1eaft (kh\u1ecfi ngu\u1ed3n cung c\u1ea5p) s\u1ebd khi\u1ebfn b\u1ed9 ng\u1eaft gi\u1eef \u1edf v\u1ecb tr\u00ed TRIP, cho \u0111\u1ebfn khi \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i th\u1ee7 c\u00f4ng. Cu\u1ed9n shunt trip s\u1ebd b\u1ecb m\u1ea5t \u0111i\u1ec7n do ti\u1ebfp \u0111i\u1ec3m \u0111i\u1ec1u khi\u1ec3n m\u1edf ho\u1eb7c do c\u00f4ng t\u1eafc c\u1eaft b\u00ean trong ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<\/ol>\n

    Ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 \u0111\u1eb7t l\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch shunt trip gi\u1ed1ng h\u1ec7t nh\u01b0 c\u00e1ch \u0111\u1eb7t l\u1ea1i b\u1ea5t k\u1ef3 lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch n\u00e0o kh\u00e1c \u2013 t\u1ee9c l\u00e0 xoay tay c\u1ea7m t\u1eeb v\u1ecb tr\u00ed \u201cOFF\u201d sang v\u1ecb tr\u00ed \u201cON\u201d. Khi b\u1ea1n th\u1ef1c hi\u1ec7n h\u00e0nh \u0111\u1ed9ng n\u00e0y, c\u01a1 ch\u1ebf shunt trip s\u1ebd t\u1ef1 \u0111\u1ed9ng n\u1ea1p l\u1ea1i nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a qu\u00e1 tr\u00ecnh \u0111\u1eb7t l\u1ea1i v\u00e0 s\u1eb5n s\u00e0ng cho ho\u1ea1t \u0111\u1ed9ng ti\u1ebfp theo.<\/p>\n

    C\u00e1ch m\u00e0 C\u1ea7u Dao Shunt Trip Kh\u00e1c v\u1edbi C\u1ea7u Dao Ti\u00eau Chu\u1ea9n<\/h2>\n\n\n\n\n\n\n\n\n\n
    T\u00ednh N\u0103ng<\/th>\nC\u1ea7u Dao \u0110i\u1ec7n Ti\u00eau Chu\u1ea9n<\/th>\nC\u1ea7u Dao Shunt Trip<\/th>\n<\/tr>\n<\/thead>\n
    Ph\u01b0\u01a1ng ph\u00e1p k\u00edch ho\u1ea1t<\/strong><\/td>\nCh\u1ec9 qu\u00e1 t\u1ea3i nhi\u1ec7t v\u00e0 ng\u1eafn m\u1ea1ch t\u1eeb tr\u01b0\u1eddng<\/td>\nNhi\u1ec7t, t\u1eeb tr\u01b0\u1eddng, c\u1ed9ng v\u1edbi ng\u1eaft \u0111i\u1ec7n t\u1eeb xa qua solenoid<\/td>\n<\/tr>\n
    \u0110i\u1ec1u khi\u1ec3n b\u00ean ngo\u00e0i<\/strong><\/td>\nKh\u00f4ng c\u00f3<\/td>\nNg\u1eaft b\u1edfi \u0111i\u1ec7n \u00e1p b\u00ean ngo\u00e0i \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng v\u00e0o c\u00e1c \u0111\u1ea7u \u0111i\u1ec1u khi\u1ec3n<\/td>\n<\/tr>\n
    \u0110i\u1ec7n \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/strong><\/td>\nKh\u00f4ng \u00e1p d\u1ee5ng<\/td>\nTh\u00f4ng th\u01b0\u1eddng 120 VAC ho\u1eb7c 24 VDC; ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh khi \u0111\u1eb7t h\u00e0ng<\/td>\n<\/tr>\n
    \u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>\nB\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh ti\u00eau chu\u1ea9n<\/td>\nT\u1eaft an to\u00e0n ch\u00e1y, m\u1ea1ch d\u1eebng kh\u1ea9n c\u1ea5p, c\u00e1ch ly t\u1ea3i t\u1eeb xa<\/td>\n<\/tr>\n
    Quy tr\u00ecnh \u0111\u1eb7t l\u1ea1i<\/strong><\/td>\nDi chuy\u1ec3n tay c\u1ea7m t\u1eeb TRIP sang OFF, sau \u0111\u00f3 sang ON<\/td>\nGi\u1ed1ng nhau; c\u01a1 ch\u1ebf shunt trip \u0111\u1eb7t l\u1ea1i c\u00f9ng v\u1edbi tay c\u1ea7m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    \"T\u1ea1i<\/p>\n

    T\u1ea1i sao c\u1ea7n ch\u1ec9 \u0111\u1ecbnh b\u1ed9 ng\u1eaft m\u1ea1ch Shunt Trip<\/h2>\n

    The \u2192 C\u00e1i ng\u1eaft m\u1ea1ch kh\u1ea9n c\u1ea5p<\/strong> ch\u1ee9c n\u0103ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t s\u1ef1 xa x\u1ec9. Trong nhi\u1ec1u l\u1eafp \u0111\u1eb7t, \u0111\u00f3 l\u00e0 y\u00eau c\u1ea7u c\u1ee7a m\u00e3. B\u1ed9 Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC) v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n NFPA, \u0111\u01b0\u1ee3c c\u00e1c c\u01a1 quan nh\u01b0 Hi\u1ec7p h\u1ed9i B\u1ea3o v\u1ec7 Ch\u00e1y Qu\u1ed1c gia (NFPA)<\/a>, b\u1eaft bu\u1ed9c ph\u1ea3i t\u1ef1 \u0111\u1ed9ng ng\u1eaft ngu\u1ed3n \u0111i\u1ec7n trong c\u00e1c t\u00ecnh hu\u1ed1ng nguy hi\u1ec3m c\u1ee5 th\u1ec3:<\/p>\n