{"id":2823,"date":"2026-06-20T18:37:26","date_gmt":"2026-06-20T18:37:26","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=2823"},"modified":"2026-06-20T18:37:28","modified_gmt":"2026-06-20T18:37:28","slug":"circuit-breakers-and-disconnect-switches-are-examples-of","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/circuit-breakers-and-disconnect-switches-are-examples-of\/","title":{"rendered":"C\u1ea7u dao v\u00e0 c\u00f4ng t\u1eafc ng\u1eaft l\u00e0 nh\u1eefng v\u00ed d\u1ee5 v\u1ec1"},"content":{"rendered":"

C\u00e1c k\u1ef9 s\u01b0 \u0111i\u1ec7n s\u1ebd t\u00edch h\u1ee3p m\u1ed9t c\u1ea7u dao v\u00e0 m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft trong c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1. C\u1ea3 hai \u0111\u1ec1u n\u1eb1m c\u1ea1nh nhau trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, c\u00f3 tay c\u1ea7m v\u00e0 c\u00f3 th\u1ec3 ng\u1eaft ngu\u1ed3n \u0111\u1ebfn t\u1ea3i theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1. Tuy nhi\u00ean, c\u00e1c thi\u1ebft b\u1ecb n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho hai m\u1ee5c \u0111\u00edch kh\u00e1c nhau: c\u1ea7u dao l\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 c\u00f4ng t\u1eafc ng\u1eaft l\u00e0 thi\u1ebft b\u1ecb c\u00e1ch ly. Vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u1eeb c\u00e1c thi\u1ebft b\u1ecb c\u00e1ch ly v\u00e0 hi\u1ec3u l\u00fd do t\u1ea1i sao c\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 r\u1ea5t quan tr\u1ecdng khi thi\u1ebft k\u1ebf c\u00e1c l\u1eafp \u0111\u1eb7t \u0111i\u1ec7n \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 t\u1ea5t c\u1ea3 c\u00e1c quy \u0111\u1ecbnh \u00e1p d\u1ee5ng.<\/p>\n

\"Hai<\/p>\n

Hai lo\u1ea1i: B\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 C\u00e1ch ly<\/h2>\n

M\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng l\u00e0 m\u1ed9t m\u1ea1ch t\u1ef1 \u0111\u1ed9ng m\u1edf (thu\u1eadt ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng thay th\u1ebf cho nhau). N\u1ebfu d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 c\u00e1c gi\u00e1 tr\u1ecb quy \u0111\u1ecbnh, c\u1ea7u dao s\u1ebd m\u1edf (ng\u1eebng d\u00f2ng \u0111i\u1ec7n) m\u00e0 kh\u00f4ng c\u1ea7n can thi\u1ec7p c\u1ee7a con ng\u01b0\u1eddi. Trong \u0111i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i (nhi\u1ec1u thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 d\u00f2ng \u0111i\u1ec7n t\u1eeb m\u1ed9t m\u1ea1ch duy nh\u1ea5t) v\u00e0 trong \u0111i\u1ec1u ki\u1ec7n ng\u1eafn m\u1ea1ch (d\u00f2ng \u0111i\u1ec7n s\u1ed1ng\u2013\u0111\u1ebfn\u2013trung t\u00ednh ho\u1eb7c s\u1ed1ng\u2013\u0111\u1ebfn\u2013\u0111\u1ea5t), thi\u1ebft b\u1ecb s\u1ebd m\u1edf. Thi\u1ebft b\u1ecb s\u1ebd ho\u1ea1t \u0111\u1ed9ng \u0111\u1ee7 nhanh \u0111\u1ec3 ng\u0103n d\u00e2y d\u1eabn qu\u00e1 nhi\u1ec7t \u0111\u1ebfn m\u1ee9c d\u00e2y d\u1eabn b\u1ed1c ch\u00e1y. \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf thi\u1ebft l\u1eadp c\u00e1c ti\u00eau chu\u1ea9n cho c\u1ea7u dao gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n, IEC 60947-2 cho c\u1ea7u dao c\u00f4ng nghi\u1ec7p v\u00e0 IEC 60898 cho c\u1ea7u dao d\u00e2n d\u1ee5ng. M\u1ed7i h\u1ec7 th\u1ed1ng \u0111i\u1ec7n \u0111\u1ec1u d\u1ef1a v\u00e0o c\u1ea7u dao nh\u01b0 m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n t\u1ef1 \u0111\u1ed9ng \u0111\u1ec3 duy tr\u00ec an to\u00e0n.<\/p>\n

M\u1ed9t thi\u1ebft b\u1ecb c\u00e1ch ly (ho\u1eb7c c\u00f4ng t\u1eafc ng\u1eaft) l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u00e1ch ly t\u1ea1o ra m\u1ed9t s\u1ef1 ng\u1eaft k\u1ebft n\u1ed1i r\u00f5 r\u00e0ng trong m\u1ea1ch \u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng thi\u1ebft b\u1ecb h\u1ea1 ngu\u1ed3n an to\u00e0n kh\u00f4ng c\u00f3 n\u0103ng l\u01b0\u1ee3ng tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n c\u00f4ng vi\u1ec7c. M\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh b\u1eb1ng tay v\u00e0 kh\u00f4ng th\u1ec3 b\u1ecb k\u00edch ho\u1ea1t do qu\u00e1 d\u00f2ng. Ch\u1ee9c n\u0103ng c\u1ee7a n\u00f3 l\u00e0 m\u1edf m\u1ea1ch v\u00e0 gi\u1eef cho m\u1ea1ch m\u1edf b\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t kho\u1ea3ng tr\u1ed1ng r\u00f5 r\u00e0ng (kho\u1ea3ng c\u00e1ch) ho\u1eb7c ch\u1ec9 ra v\u1ecb tr\u00ed m\u1edf. \u0110i\u1ec1u ph\u00e2n bi\u1ec7t m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft v\u1edbi m\u1ed9t c\u1ea7u dao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft l\u00e0 vi\u1ec7c cung c\u1ea5p kh\u00f3a\/tagout. C\u00f4ng t\u1eafc ng\u1eaft s\u1ebd c\u00f3 m\u1ed9t kh\u00f3a ho\u1eb7c thi\u1ebft b\u1ecb kh\u00f3a kh\u00e1c cho ph\u00e9p ng\u01b0\u1eddi d\u00f9ng \u0111\u1eb7t m\u1ed9t \u1ed5 kh\u00f3a v\u00e0o tay c\u1ea7m c\u00f4ng t\u1eafc \u0111\u1ec3 ng\u0103n c\u00f4ng t\u1eafc \u0111\u00f3ng trong qu\u00e1 tr\u00ecnh b\u1ea3o tr\u00ec. T\u00ednh n\u0103ng Kh\u00f3a v\u00e0 Tagout n\u00e0y l\u00e0 b\u1eaft bu\u1ed9c theo OSHA t\u1ea1i Hoa K\u1ef3 v\u00e0 theo c\u00e1c quy \u0111\u1ecbnh to\u00e0n c\u1ea7u t\u01b0\u01a1ng t\u1ef1 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n trong n\u01a1i l\u00e0m vi\u1ec7c. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p bao g\u1ed3m <\/span>Eaton<\/a> v\u00e0 <\/span>Siemens<\/a> s\u1ea3n xu\u1ea5t c\u1ea3 c\u00f4ng t\u1eafc ng\u1eaft c\u00f3 c\u1ea7u ch\u00ec v\u00e0 kh\u00f4ng c\u00f3 c\u1ea7u ch\u00ec \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho ch\u1ee9c n\u0103ng an to\u00e0n n\u00e0y.<\/span><\/p>\n

\"B\u1ed9<\/p>\n

C\u1ea7u dao chi ti\u1ebft: B\u1ea3o v\u1ec7 t\u1ef1 \u0111\u1ed9ng cho m\u1ecdi m\u1ea1ch<\/h2>\n

M\u1ed9t c\u1ea7u dao l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 hai ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7. C\u1ea7u dao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t ph\u1ea7n t\u1eed nhi\u1ec7t v\u00e0 d\u1ea3i bimetal, m\u00e0 u\u1ed1n cong khi nhi\u1ec7t \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng b\u1edfi m\u1ed9t \u0111i\u1ec1u ki\u1ec7n qu\u00e1 t\u1ea3i, \u0111\u1ec3 gi\u1ea3i ph\u00f3ng ch\u1ed1t c\u1ee7a n\u00f3 v\u00e0 ng\u1eaft c\u1ea7u dao. M\u1ed9t c\u1ea7u dao c\u0169ng c\u00f3 m\u1ed9t ph\u1ea7n t\u1eed t\u1eeb t\u00ednh, \u0111\u00f3 l\u00e0 m\u1ed9t cu\u1ed9n \u0111i\u1ec7n t\u1eeb, ph\u1ea3n \u1ee9ng ngay l\u1eadp t\u1ee9c v\u1edbi m\u1ed9t d\u00f2ng \u0111i\u1ec7n l\u1edbn khi c\u00f3 m\u1ed9t m\u1ea1ch ng\u1eafn; do \u0111\u00f3, m\u1ed9t c\u1ea7u dao c\u00f3 th\u1ec3 ng\u1eaft trong mili gi\u00e2y. Sau khi l\u1ed7i \u0111\u01b0\u1ee3c kh\u1eafc ph\u1ee5c, m\u1ed9t c\u1ea7u dao c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i v\u00e0 s\u1eed d\u1ee5ng l\u1ea1i; tuy nhi\u00ean, m\u1ed9t c\u1ea7u ch\u00ec ph\u1ea3i \u0111\u01b0\u1ee3c thay th\u1ebf khi n\u00f3 b\u1ecb \u0111\u1ee9t.<\/p>\n

C\u00e1c lo\u1ea1i c\u1ea7u dao kh\u00e1c nhau bao ph\u1ee7 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau t\u1eeb l\u1edbn \u0111\u1ebfn nh\u1ecf. M\u1ed9t c\u1ea7u dao mini cung c\u1ea5p b\u1ea3o v\u1ec7 cho m\u1ed9t \u1ed5 c\u1eafm ho\u1eb7c m\u1ea1ch chi\u1ebfu s\u00e1ng \u0111\u01a1n trong nh\u00e0. C\u1ea7u dao v\u1ecf \u0111\u00fac cung c\u1ea5p b\u1ea3o v\u1ec7 cho m\u1ed9t ngu\u1ed3n c\u1ea5p \u0111\u1ed9ng c\u01a1 ho\u1eb7c b\u1ea3ng ph\u1ee5 trong m\u1ed9t t\u00f2a nh\u00e0 th\u01b0\u01a1ng m\u1ea1i. C\u1ea7u dao kh\u00f4ng kh\u00ed cung c\u1ea5p b\u1ea3o v\u1ec7 cho ngu\u1ed3n cung c\u1ea5p ch\u00ednh v\u00e0o nh\u00e0 m\u00e1y. D\u00f2ng AC MCB c\u1ee7a HUYU, bao g\u1ed3m <\/span>c\u1ea7u dao mini HUM18\u201163<\/a>, cung c\u1ea5p b\u1ea3o v\u1ec7 t\u1ef1 \u0111\u1ed9ng n\u00e0y cho c\u00e1c m\u1ea1ch ph\u00e2n ph\u1ed1i l\u00ean \u0111\u1ebfn 63A v\u1edbi kh\u1ea3 n\u0103ng ng\u1eaft 10kA. \u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng DC nh\u01b0 c\u00e1c m\u1ea3ng PV m\u1eb7t tr\u1eddi v\u00e0 l\u01b0u tr\u1eef pin, c\u00e1c MCB v\u00e0 MCCB DC c\u1ee7a HUYU \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n DC li\u00ean t\u1ee5c m\u00e0 m\u1ed9t c\u1ea7u dao AC kh\u00f4ng th\u1ec3 x\u1eed l\u00fd an to\u00e0n. B\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <\/span>kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch m\u1ea1ch DC MCB AC<\/a> gi\u1ea3i th\u00edch v\u1eadt l\u00fd \u0111\u1ee9ng sau s\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y.<\/span><\/p>\n

\"C\u00f4ng<\/p>\n

C\u1ea7u dao ng\u1eaft trong chi ti\u1ebft: C\u00e1ch ly r\u00f5 r\u00e0ng cho b\u1ea3o tr\u00ec an to\u00e0n<\/h2>\n

M\u1eb7c d\u00f9 m\u1ed9t c\u1ea7u dao ng\u1eaft c\u00f3 c\u00f9ng c\u00e1c t\u00ednh n\u0103ng nh\u01b0 m\u1ed9t c\u1ea7u dao l\u1edbn b\u00ean ngo\u00e0i (v\u1edbi tay c\u1ea7m, l\u1eafp \u0111\u1eb7t b\u1ea3ng, v\u00e0 k\u1ebft n\u1ed1i v\u00e0 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n), ch\u00fang kh\u00f4ng ch\u1ee9a c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft nhi\u1ec7t ho\u1eb7c t\u1eeb t\u00ednh. L\u00e0 m\u1ed9t c\u00f4ng t\u1eafc th\u1ee7 c\u00f4ng, ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 k\u1ebft n\u1ed1i ho\u1eb7c ng\u1eaft m\u1ed9t m\u1ea1ch mang t\u1ea3i \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a n\u00f3, nh\u01b0ng kh\u00f4ng \u0111\u1ec3 cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i. M\u1ed9t ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a c\u1ea7u dao ng\u1eaft l\u00e0 cung c\u1ea5p m\u1ed9t ph\u01b0\u01a1ng ti\u1ec7n \u0111\u1ec3 c\u00e1ch ly m\u1ed9t m\u1ea1ch \u0111\u1ec3 c\u00f3 th\u1ec3 x\u00e1c minh ch\u1eafc ch\u1eafn r\u1eb1ng m\u1ea1ch \u0111\u00f3 \u0111\u00e3 ch\u1ebft (kh\u00f4ng c\u00f3 \u0111i\u1ec7n).<\/p>\n

C\u00f3 hai lo\u1ea1i c\u1ea7u dao ng\u1eaft: nh\u1eefng lo\u1ea1i c\u00f3 c\u1ea7u ch\u00ec (c\u1ea7u dao ng\u1eaft c\u00f3 c\u1ea7u ch\u00ec) v\u00e0 nh\u1eefng lo\u1ea1i kh\u00f4ng c\u00f3 (c\u1ea7u dao ng\u1eaft kh\u00f4ng c\u00f3 c\u1ea7u ch\u00ec). M\u1ed9t c\u1ea7u dao ng\u1eaft c\u00f3 c\u1ea7u ch\u00ec c\u00f3 c\u1ea7u ch\u00ec b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i qu\u00e1 nhi\u1ec1u d\u00f2ng \u0111i\u1ec7n (qu\u00e1 d\u00f2ng) v\u00e0 c\u0169ng c\u00f3 m\u1ed9t c\u00f4ng t\u1eafc cho ph\u00e9p c\u00e1ch ly c\u00e1c ph\u1ea7n t\u1eed m\u1ea1ch kh\u1ecfi nhau. M\u1ed9t c\u1ea7u dao ng\u1eaft kh\u00f4ng c\u00f3 c\u1ea7u ch\u00ec ch\u1ec9 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1ch ly v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb ph\u00eda h\u1ea1 l\u01b0u t\u1eeb m\u1ed9t thi\u1ebft b\u1ecb kh\u00e1c cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng (c\u1ea7u dao ho\u1eb7c c\u1ea7u ch\u00ec). T\u1ea1i B\u1eafc M\u1ef9, c\u00e1c c\u1ea7u dao ng\u1eaft kh\u00f4ng c\u00f3 c\u1ea7u ch\u00ec th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f3 m\u1ed9t c\u1ea7u dao n\u1eb1m trong m\u1ed9t b\u1ea3ng cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, v\u00e0 c\u1ea7u dao ng\u1eaft t\u1ea1i \u0111\u1ed9ng c\u01a1 (c\u1ea9u tr\u00ean cao, n\u00e2ng, v.v.); \u0111i\u1ec1u n\u00e0y \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec3m c\u00e1ch ly kh\u00f3a c\u1ea7n thi\u1ebft theo NEC. C\u00e1c phi\u00ean b\u1ea3n k\u00edn c\u1ee7a c\u1ea7u dao ng\u1eaft c\u00f3 s\u1eb5n v\u1edbi m\u1ed9t l\u01b0\u1ee1i nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y qua m\u1ed9t c\u1eeda s\u1ed5 quan s\u00e1t; lo\u1ea1i thi\u1ebft k\u1ebf n\u00e0y cho ph\u00e9p x\u00e1c nh\u1eadn vi\u1ec7c kh\u00f4ng c\u00f3 \u0111i\u1ec7n tr\u01b0\u1edbc khi kh\u00f3a.<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa c\u1ea7u dao v\u00e0 c\u1ea7u dao ng\u1eaft<\/h2>\n\n\n\n\n\n\n\n\n\n\n
\u0110\u1eb7c \u0111i\u1ec3m<\/th>\nC\u1ea7u dao<\/th>\nC\u1ea7u dao ng\u1eaft<\/th>\n<\/tr>\n<\/thead>\n
Ch\u1ee9c n\u0103ng ch\u00ednh<\/strong><\/td>\nB\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 ng\u1eafn m\u1ea1ch t\u1ef1 \u0111\u1ed9ng<\/td>\nC\u00e1ch ly th\u1ee7 c\u00f4ng \u0111\u1ec3 b\u1ea3o tr\u00ec an to\u00e0n<\/td>\n<\/tr>\n
Ho\u1ea1t \u0111\u1ed9ng t\u1ef1 \u0111\u1ed9ng khi c\u00f3 s\u1ef1 c\u1ed1?<\/strong><\/td>\nC\u00f3 \u2014 ng\u1eaft nhi\u1ec7t v\u00e0 t\u1eeb t\u00ednh<\/td>\nKh\u00f4ng \u2014 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng th\u1ee7 c\u00f4ng<\/td>\n<\/tr>\n
Quy \u0111\u1ecbnh kh\u00f3a v\u00e0 g\u1eafn th\u1ebb<\/strong><\/td>\nM\u1ed9t s\u1ed1 m\u1eabu bao g\u1ed3m tay c\u1ea7m c\u00f3 th\u1ec3 kh\u00f3a; kh\u00f4ng ph\u1ea3i ti\u00eau chu\u1ea9n ph\u1ed5 qu\u00e1t<\/td>\nPh\u1ea7n t\u00edch h\u1ee3p c\u1ee7a thi\u1ebft b\u1ecb; y\u00eau c\u1ea7u b\u1edfi c\u00e1c quy \u0111\u1ecbnh an to\u00e0n<\/td>\n<\/tr>\n
Ng\u1eaft r\u00f5 r\u00e0ng<\/strong><\/td>\nTh\u01b0\u1eddng kh\u00f4ng; ch\u1ec9 b\u00e1o ng\u1eaft b\u1eb1ng v\u1ecb tr\u00ed tay c\u1ea7m ho\u1eb7c c\u1edd<\/td>\nThi\u1ebft k\u1ebf l\u01b0\u1ee1i nh\u00ecn th\u1ea5y c\u00f3 s\u1eb5n \u0111\u1ec3 x\u00e1c nh\u1eadn t\u00edch c\u1ef1c<\/td>\n<\/tr>\n
\u0110\u1eb7t l\u1ea1i sau khi ho\u1ea1t \u0111\u1ed9ng<\/strong><\/td>\nC\u00f3 \u2014 ch\u1ec9 c\u1ea7n l\u1eadt tay c\u1ea7m tr\u1edf l\u1ea1i V\u00c0O<\/td>\nC\u00f3 \u2014 nh\u01b0ng kh\u00f4ng c\u00f3 g\u00ec \u0111\u1ec3 \u201c\u0111\u1eb7t l\u1ea1i\u201d v\u00ec n\u00f3 ch\u1ec9 m\u1edf b\u1eb1ng tay<\/td>\n<\/tr>\n
Ti\u00eau chu\u1ea9n \u0111i\u1ec3n h\u00ecnh<\/strong><\/td>\nIEC 60898, IEC 60947\u20112, UL 489<\/td>\nIEC 60947\u20113, UL 98<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

T\u1ea1i sao c\u1ea3 hai thi\u1ebft b\u1ecb th\u01b0\u1eddng \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u tr\u00ean c\u00f9ng m\u1ed9t m\u1ea1ch<\/h2>\n

Vi\u1ec7c c\u00f3 m\u1ed9t c\u1ea7u dao v\u00e0 c\u00f4ng t\u1eafc ng\u1eaft trong chu\u1ed7i tr\u00ean c\u00f9ng m\u1ed9t ngu\u1ed3n c\u1ea5p l\u00e0 th\u1ef1c h\u00e0nh ph\u1ed5 bi\u1ebfn; c\u1ea7u dao b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i qu\u00e1 d\u00f2ng t\u1ef1 \u0111\u1ed9ng trong khi c\u00f4ng t\u1eafc ng\u1eaft cho ph\u00e9p m\u1ed9t \u0111i\u1ec3m c\u00e1ch ly, c\u00f3 th\u1ec3 kh\u00f3a \u0111\u1ec3 b\u1ea3o tr\u00ec di\u1ec5n ra. C\u1ea3 hai c\u00e1ch s\u1eafp x\u1ebfp \u0111\u1ec1u \u0111i\u1ec3n h\u00ecnh trong c\u00e1c m\u1ea1ch \u0111\u1ed9ng c\u01a1, s\u01b0\u1edfi \u1ea5m, th\u00f4ng gi\u00f3 v\u00e0 \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed (HVAC), v\u00e0 cho t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u0129nh vi\u1ec5n v\u1edbi h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 c\u1ea7n d\u1ecbch v\u1ee5 ho\u1eb7c b\u1ea3o tr\u00ec t\u1eeb th\u1eddi gian n\u00e0y sang th\u1eddi gian kh\u00e1c. Theo NEC (M\u00e3 \u0111i\u1ec7n qu\u1ed1c gia) \u00a7422.31, t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ed9ng c\u01a1 thi\u1ebft b\u1ecb k\u1ebft n\u1ed1i v\u0129nh vi\u1ec5n c\u1ea7n c\u00f3 m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn. Do th\u1ef1c t\u1ebf r\u1eb1ng m\u1ed9t c\u1ea7u dao c\u00f3 th\u1ec3 kh\u00f4ng lu\u00f4n n\u1eb1m trong t\u1ea7m nh\u00ecn c\u1ee7a \u0111\u1ed9ng c\u01a1 thi\u1ebft b\u1ecb, m\u1ed9t c\u00f4ng t\u1eafc ng\u1eaft c\u1ee5c b\u1ed9 ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t b\u00ean c\u1ea1nh thi\u1ebft b\u1ecb \u0111\u1ec3 cung c\u1ea5p c\u00e1ch ly khi b\u1ea3o tr\u00ec di\u1ec5n ra. C\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 cung c\u1ea5p b\u1ea3o tr\u00ec an to\u00e0n cho thi\u1ebft b\u1ecb; kh\u00f4ng thi\u1ebft b\u1ecb n\u00e0o cung c\u1ea5p c\u00f9ng m\u1ed9t m\u1ee9c b\u1ea3o v\u1ec7 nh\u01b0 thi\u1ebft b\u1ecb kia.<\/p>\n

M\u1ed9t c\u1ea7u dao \u0111i\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft, v\u1edbi \u0111i\u1ec1u ki\u1ec7n n\u00f3 \u0111\u00e1p \u1ee9ng c\u00e1c \u0111i\u1ec1u ki\u1ec7n sau: N\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c cho vi\u1ec7c ng\u1eaft, v\u00e0 n\u00f3 ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf n\u01a1i c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y t\u1eeb thi\u1ebft b\u1ecb. C\u00e1c thi\u1ebft b\u1ecb ng\u1eaft kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng tr\u1eeb khi thi\u1ebft b\u1ecb ng\u1eaft l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft c\u00f3 c\u1ea7u ch\u00ec s\u1eed d\u1ee5ng c\u1ea7u ch\u00ec c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p; s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0y kh\u00f4ng ch\u1ec9 l\u00e0 v\u1ea5n \u0111\u1ec1 \u0111\u1ecbnh ngh\u0129a, m\u00e0 c\u00f2n \u0111\u01b0\u1ee3c th\u1ef1c thi b\u1edfi c\u00e1c y\u00eau c\u1ea7u c\u1ee7a m\u00e3 \u0111i\u1ec7n v\u00e0 b\u1edfi v\u1eadt l\u00fd c\u1ee7a d\u00f2ng \u0111i\u1ec7n l\u1ed7i qua c\u00e1c thi\u1ebft b\u1ecb kh\u00f4ng ng\u1eaft d\u00f2ng \u0111i\u1ec7n.<\/p>\n

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

C\u1ea7u dao v\u00e0 c\u00f4ng t\u1eafc ng\u1eaft l\u00e0 v\u00ed d\u1ee5 v\u1ec1 g\u00ec?<\/h3>\n

C\u1ea7u dao v\u00e0 c\u00f4ng t\u1eafc ng\u1eaft l\u00e0 v\u00ed d\u1ee5 v\u1ec1<\/strong>\u00a0C\u00e1c thi\u1ebft b\u1ecb c\u00e1ch ly v\u00e0 c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng l\u00e0 c\u00e1c lo\u1ea1i thi\u1ebft b\u1ecb \u0111i\u1ec7n ri\u00eang bi\u1ec7t th\u1ef1c hi\u1ec7n c\u00e1c ch\u1ee9c n\u0103ng kh\u00e1c nhau. V\u00ed d\u1ee5, h\u1ea7u h\u1ebft c\u00e1c c\u1ea7u dao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u0103n ng\u1eeba qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch (t\u1ee9c l\u00e0, b\u1eb1ng c\u00e1ch ng\u1eaft). C\u00f4ng t\u1eafc ng\u1eaft \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh b\u1eb1ng tay, cho ph\u00e9p b\u1ea3o tr\u00ec an to\u00e0n v\u00e0 cung c\u1ea5p c\u00e1ch ly kh\u1ecfi ngu\u1ed3n \u0111i\u1ec7n (m\u1ed9t \u201cthi\u1ebft b\u1ecb c\u00e1ch ly\u201d). M\u1ed7i lo\u1ea1i c\u00f3 b\u1ed9 ti\u00eau chu\u1ea9n ri\u00eang x\u00e1c \u0111\u1ecbnh c\u00e1ch n\u00f3 n\u00ean ho\u1ea1t \u0111\u1ed9ng v\u00e0 ch\u1ee9c n\u0103ng d\u1ef1 ki\u1ebfn c\u1ee7a n\u00f3.<\/p>\n

C\u1ea7u dao l\u00e0 lo\u1ea1i c\u00f4ng t\u1eafc g\u00ec?<\/h3>\n

M\u1ed9t c\u1ea7u dao l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 m\u1ea1ch kh\u00f4ng bao gi\u1edd th\u1ea5t b\u1ea1i. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh b\u1eb1ng tay, nh\u01b0ng t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 t\u1ef1 \u0111\u1ed9ng ng\u1eaft m\u1ea1ch khi nh\u1eadn ra t\u00ecnh tr\u1ea1ng qu\u00e1 t\u1ea3i ho\u1eb7c ng\u1eafn m\u1ea1ch m\u00e0 kh\u00f4ng c\u1ea7n s\u1ef1 tr\u1ee3 gi\u00fap c\u1ee7a con ng\u01b0\u1eddi.<\/p>\n

C\u1ea7u dao ng\u1eaft l\u00e0 lo\u1ea1i c\u00f4ng t\u1eafc n\u00e0o?<\/h3>\n

C\u1ea7u dao ng\u1eaft t\u00e1ch m\u1ed9t m\u1ea1ch kh\u1ecfi ngu\u1ed3n \u0111i\u1ec7n c\u1ee7a n\u00f3. C\u00f4ng t\u1eafc \u0111\u01b0\u1ee3c v\u1eadn h\u00e0nh b\u1eb1ng tay b\u1edfi ng\u01b0\u1eddi s\u1eed d\u1ee5ng, \u0111\u1ec3 m\u1edf ho\u1eb7c \u0111\u00f3ng m\u1ed9t m\u1ea1ch. C\u1ea7u dao ng\u1eaft ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 cung c\u1ea5p m\u1ed9t ch\u1ec9 b\u00e1o v\u1eadt l\u00fd v\u1ec1 s\u1ef1 t\u00e1ch bi\u1ec7t gi\u1eefa m\u1ea1ch v\u00e0 ngu\u1ed3n cung c\u1ea5p c\u1ee7a n\u00f3, x\u00e1c nh\u1eadn r\u1eb1ng m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1eaft \u0111i\u1ec7n tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u b\u1ea5t k\u1ef3 c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec n\u00e0o tr\u00ean thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c cung c\u1ea5p t\u1eeb m\u1ea1ch \u0111\u00f3.<\/p>\n

C\u1ea7u dao ng\u1eaft c\u00f3 ph\u1ea3i l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng kh\u00f4ng?<\/h3>\n

M\u1ed9t thi\u1ebft b\u1ecb c\u00e1ch ly n\u0103ng l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t c\u1ea7u dao ng\u1eaft theo quy \u0111\u1ecbnh c\u1ee7a C\u1ee5c An to\u00e0n v\u00e0 S\u1ee9c kh\u1ecfe Ngh\u1ec1 nghi\u1ec7p (OSHA), bao g\u1ed3m c\u00e1c quy tr\u00ecnh \u2018kh\u00f3a\u2019 v\u00e0 \u2018nh\u00e3n ch\u1ec9 b\u00e1o\u2019 n\u01a1i n\u00f3 b\u1ea3o v\u1ec7 ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng kh\u1ecfi c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n c\u1ee7a b\u1ea1n. C\u1ea7u dao ng\u1eaft k\u1ebft n\u1ed1i m\u1ea1ch \u0111i\u1ec7n c\u1ee7a b\u1ea1n v\u1edbi ngu\u1ed3n n\u0103ng l\u01b0\u1ee3ng c\u1ee7a b\u1ea1n v\u00e0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c kh\u00f3a \u1edf v\u1ecb tr\u00ed m\u1edf \u0111\u1ec3 kh\u00f4ng c\u00f3 tai n\u1ea1n n\u00e0o c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n tr\u1edf l\u1ea1i.<\/p>\n

T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n