{"id":3930,"date":"2026-09-05T00:00:00","date_gmt":"2026-09-05T00:00:00","guid":{"rendered":"https:\/\/chac-electric.com\/?p=3930"},"modified":"2026-09-28T08:23:20","modified_gmt":"2026-09-28T08:23:20","slug":"lam-the-nao-de-biet-cau-dao-co-hong-khong","status":"publish","type":"post","link":"https:\/\/chac-electric.com\/vi\/blog\/how-to-tell-if-circuit-breaker-is-bad\/","title":{"rendered":"C\u00e1ch bi\u1ebft m\u1ed9t c\u1ea7u dao \u0111i\u1ec7n b\u1ecb h\u1ecfng hay kh\u00f4ng"},"content":{"rendered":"

K\u1ecbch b\u1ea3n minh h\u1ecda (kh\u00f4ng ph\u1ea3i tr\u01b0\u1eddng h\u1ee3p kh\u00e1ch h\u00e0ng \u0111\u01b0\u1ee3c b\u00e1o c\u00e1o):<\/strong> Khi m\u1ed9t ng\u01b0\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf v\u1eadt ch\u1ea5t \u1edf Manchester ph\u00e1t hi\u1ec7n ra vi\u1ec7c li\u00ean t\u1ee5c ng\u1eaft m\u00e1y c\u1ee7a d\u00e2y chuy\u1ec1n \u0111\u00f3ng g\u00f3i, c\u00f4 \u1ea5y \u0111\u00e3 y\u00eau c\u1ea7u m\u1ed9t th\u1ee3 \u0111i\u1ec7n ghi l\u1ea1i t\u00ecnh tr\u1ea1ng m\u00e1y tr\u01b0\u1edbc khi \u0111\u1eb7t l\u1ea1i c\u00f4ng t\u1eafc ng\u1eaft d\u00e2y chuy\u1ec1n. D\u00e2y chuy\u1ec1n \u0111\u00e3 ho\u1ea1t \u0111\u1ed9ng tr\u1edf l\u1ea1i m\u1ed9t th\u1eddi gian ng\u1eafn, nh\u01b0ng sau \u0111\u00f3 l\u1ea1i d\u1eebng l\u1ea1i khi s\u1ea3n l\u01b0\u1ee3ng t\u0103ng l\u00ean. C\u00e1c d\u1eef li\u1ec7u v\u1ec1 t\u1ea3i v\u00e0 kh\u1ea3o s\u00e1t nhi\u1ec7t \u0111\u00e3 b\u00e1c b\u1ecf ch\u1ea9n \u0111o\u00e1n ban \u0111\u1ea7u: nguy\u00ean nh\u00e2n c\u1ee7a c\u00e1c s\u1ef1 c\u1ed1 l\u00e0 do \u0111\u1ea7u n\u1ed1i b\u1ecb r\u00f2 r\u1ec9 v\u00e0 b\u1ecb h\u01b0 h\u1ea1i do nhi\u1ec7t, v\u00e0 m\u1ea1ch \u0111i\u1ec7n kh\u00f4ng \u0111\u01b0\u1ee3c quy \u0111\u1ecbnh r\u00f5 r\u00e0ng, thay v\u00ec ch\u1ee9ng minh r\u1eb1ng ch\u00ednh b\u1ed9 ng\u1eaft l\u00e0 l\u1ed7i.<\/p>\n

T\u00f3m t\u1eaft:<\/strong> Nh\u1eefng l\u1ea7n thay th\u1ebf nhi\u1ec1u l\u1ea7n, vi\u1ec7c kh\u00f4ng thi\u1ebft l\u1eadp l\u1ea1i nhi\u1ec7t \u0111\u1ed9, h\u01b0 h\u1ecfng r\u00f5 r\u00e0ng ho\u1eb7c nhi\u1ec7t \u0111\u1ed9 b\u1ea5t th\u01b0\u1eddng \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1. Tuy nhi\u00ean, kh\u00f4ng c\u00f3 nguy\u00ean nh\u00e2n n\u00e0o c\u00f3 th\u1ec3 ch\u1ee9ng minh l\u00e0 do l\u1ed7i b\u00ean trong. Quy t\u1eafc 80% l\u00e0 m\u1ed9t nguy\u00ean t\u1eafc \u0111\u1ecbnh c\u1ee1, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u00e0i ki\u1ec3m tra ch\u1ea9n \u0111o\u00e1n. H\u00e3y l\u01b0u gi\u1eef nh\u1eadt k\u00fd s\u1ef1 ki\u1ec7n, so s\u00e1nh c\u00e1c b\u1eb1ng ch\u1ee9ng v\u1ec1 t\u1ea3i tr\u1ecdng v\u00e0 nhi\u1ec7t \u0111\u1ed9, v\u00e0 ch\u1ec9 thay th\u1ebf khi vi\u1ec7c ki\u1ec3m tra, th\u1eed nghi\u1ec7m ho\u1eb7c h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh.<\/p>\n

\"Nh\u00e2n
S\u1ef1 ki\u1ec7n \u1ee9ng d\u1ee5ng \u0111\u1ec3 l\u1ef1a ch\u1ecdn v\u00e0 x\u00e1c minh \u0111i\u1ec7n t\u1eed \u0111\u01b0\u1ee3c ghi l\u1ea1i.<\/figcaption><\/figure>\n

C\u00e1ch nh\u1eadn bi\u1ebft m\u1ed9t c\u1ea7u dao b\u1ecb h\u1ecfng: B\u1eaft \u0111\u1ea7u t\u1eeb b\u1ea3n ghi s\u1ef1 ki\u1ec7n<\/h2>\n

B\u1ea5t k\u1ef3 ai mu\u1ed1n t\u00ecm hi\u1ec3u c\u00e1ch x\u00e1c \u0111\u1ecbnh m\u1ed9t c\u1ea7u b\u1ea3o v\u1ec7 c\u00f3 h\u1ecfng hay kh\u00f4ng n\u00ean b\u1eaft \u0111\u1ea7u tr\u01b0\u1edbc khi ai \u0111\u00f3 b\u1eadt c\u00f4ng t\u1eafc \u0111i\u1ec7n ho\u1eb7c t\u1eaft t\u00edn hi\u1ec7u. C\u1ea7u b\u1ea3o v\u1ec7 c\u00f3 th\u1ec3 \u0111\u00e3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n do qu\u00e1 t\u1ea3i, ng\u1eafn m\u1ea1ch ho\u1eb7c l\u1ed7i n\u1ed1i \u0111\u1ea5t m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c. C\u00e1c k\u1ebft n\u1ed1i k\u00e9m, \u0111\u1eb7c t\u00ednh ng\u1eaft kh\u00f4ng ph\u00f9 h\u1ee3p, \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t v\u00e0 c\u00e1c khuy\u1ebft t\u1eadt b\u00ean trong c\u0169ng c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1. Thay c\u1ea7u b\u1ea3o v\u1ec7 qu\u00e1 s\u1edbm s\u1ebd khi\u1ebfn nguy\u00ean nh\u00e2n th\u1ef1c s\u1ef1\u2014v\u00e0 vi\u1ec7c ng\u1eaft \u0111i\u1ec7n ti\u1ebfp theo\u2014v\u1eabn c\u00f2n nguy\u00ean v\u1eb9n.<\/p>\n

T\u1ea1i sao l\u1ecbch s\u1eed chuy\u1ebfn \u0111i l\u1ea1i c\u1ea7n \u0111\u01b0\u1ee3c l\u01b0u gi\u1eef tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n vi\u1ec7c \u0111\u1eb7t l\u1ea1i?<\/h3>\n

C\u00e1c nh\u00e2n vi\u00ean c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n c\u1ea7n ghi l\u1ea1i th\u1eddi gian, c\u1ed9t \u0111i\u1ec7n b\u1ecb \u1ea3nh h\u01b0\u1edfng, c\u00e1c b\u00e1o \u0111\u1ed9ng, thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i, tr\u1ea1ng th\u00e1i s\u1ea3n xu\u1ea5t, vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i g\u1ea7n \u0111\u00e2y v\u00e0 c\u00e1c d\u1ea5u hi\u1ec7u r\u00f5 r\u00e0ng. Ch\u1ee5p l\u1ecbch s\u1eed s\u1ef1 ki\u1ec7n<\/strong> C\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn c\u00e1c s\u1ef1 c\u1ed1 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1, thay \u0111\u1ed5i quy tr\u00ecnh ho\u1eb7c l\u1ed7i \u1edf h\u1ea1 l\u01b0u. \u0110\u01a1n v\u1ecb \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n t\u1eed ho\u1eb7c nh\u1eadt k\u00fd gi\u00e1m s\u00e1t n\u00ean \u0111\u01b0\u1ee3c l\u01b0u theo quy tr\u00ecnh c\u1ee7a c\u01a1 s\u1edf tr\u01b0\u1edbc khi kh\u1edfi \u0111\u1ed9ng l\u1ea1i ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ec3 x\u00f3a d\u1eef li\u1ec7u.<\/p>\n

Vi\u1ec7c reset ch\u1ec9 cho th\u1ea5y r\u1eb1ng c\u01a1 ch\u1ebf n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp; n\u00f3 kh\u00f4ng gi\u1ea3i th\u00edch v\u1ec1 qu\u00e1 tr\u00ecnh ho\u1ea1t \u0111\u1ed9ng c\u0169ng nh\u01b0 kh\u00f4ng x\u00e1c nh\u1eadn hi\u1ec7u su\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh. C\u00e1c h\u01b0 h\u1ecfng, nguy\u00ean nh\u00e2n kh\u00f4ng x\u00e1c \u0111\u1ecbnh, ho\u1eb7c vi\u1ec7c kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp sau khi h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 an to\u00e0n c\u1ea7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u tra k\u1ef9 l\u01b0\u1ee1ng. NFPA 70 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn vi\u1ec7c l\u1eafp \u0111\u1eb7t an to\u00e0n, trong khi NFPA 70B h\u1ed7 tr\u1ee3 vi\u1ec7c b\u1ea3o tr\u00ec d\u1ef1a tr\u00ean t\u00ecnh tr\u1ea1ng v\u00e0 \u0111\u01b0\u1ee3c ghi ch\u00e9p l\u1ea1i.<\/p>\n

C\u00e1c d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ed1i c\u1ea3nh tr\u01b0\u1edbc khi \u0111\u01b0a ra l\u1eddi khuy\u00ean thay th\u1ebf<\/h2>\n

\u0110i\u1ec1u \u0111\u00e1ng n\u00f3i nh\u1ea5t Tri\u1ec7u ch\u1ee9ng h\u1ecfng c\u1ea7u dao \u0111i\u1ec7n<\/a><\/strong> Ch\u00fang c\u00f3 th\u1ec3 l\u1eb7p l\u1ea1i v\u00e0 \u0111\u01b0\u1ee3c ch\u1ee9ng minh qua th\u1ef1c t\u1ebf ho\u1ea1t \u0111\u1ed9ng. Tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng gi\u1eef \u0111\u01b0\u1ee3c v\u1ecb tr\u00ed \u0111\u1eb7t, h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb, m\u00f9i h\u00f4i, ti\u1ebfng \u1ed3n, nhi\u1ec7t \u0111\u1ed9 cao ho\u1eb7c s\u1ef1 c\u1ed1 khi t\u1ea3i t\u1ea3i \u1ed5n \u0111\u1ecbnh \u0111\u1ec1u c\u1ea7n \u0111\u01b0\u1ee3c ch\u00fa \u00fd. D\u00f9 v\u1eady, c\u00e1c l\u1ed7i \u1edf ph\u00eda h\u1ea1 l\u01b0u c\u00f3 th\u1ec3 ng\u0103n kh\u00f4ng cho vi\u1ec7c reset, d\u00e2y d\u1eabn qu\u00e1 t\u1ea3i c\u0169ng t\u1ea1o ra nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 c\u00e1c m\u1ed1i n\u1ed1i ho\u1eb7c kh\u1edbp n\u1ed1i k\u00e9m c\u00f3 th\u1ec3 l\u00e0m cho b\u1ed9 ng\u1eaft \u0111i\u1ec7n kh\u1ecfe m\u1ea1nh b\u1ecb \u0111\u1ed5i m\u00e0u.<\/p>\n\n\n\n\n\n\n\n\n
Tri\u1ec7u ch\u1ee9ng \u0111\u01b0\u1ee3c quan s\u00e1t th\u1ea5y<\/th>\nNguy\u00ean nh\u00e2n c\u1ee7a s\u1ef1 c\u1ea1nh tranh<\/th>\nGi\u1edbi h\u1ea1n b\u1eb1ng ch\u1ee9ng<\/th>\nQuy\u1ebft \u0111\u1ecbnh b\u1ea3o tr\u00ec<\/th>\n<\/tr>\n<\/thead>\n
Nh\u1eefng chuy\u1ebfn \u0111i v\u00e0o th\u1eddi \u0111i\u1ec3m s\u1ea3n xu\u1ea5t \u0111\u1ea1t \u0111\u1ec9nh \u0111i\u1ec3m<\/td>\nQu\u00e1 t\u1ea3i, d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c, chu k\u1ef3 l\u00e0m vi\u1ec7c thay \u0111\u1ed5i ho\u1eb7c \u0111\u01b0\u1eddng cong kh\u00f4ng ph\u00f9 h\u1ee3p<\/td>\nM\u1ed9t chuy\u1ebfn \u0111i kh\u00f4ng th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c nguy\u00ean nh\u00e2n.<\/td>\nB\u1ea3o to\u00e0n s\u1ef1 ki\u1ec7n; r\u00e0 so\u00e1t t\u1ea3i tr\u1ecdng v\u00e0 ph\u1ed1i h\u1ee3p.<\/td>\n<\/tr>\n
S\u1ebd kh\u00f4ng b\u1ecb \u0111\u1eb7t l\u1ea1i thi\u1ebft l\u1eadp<\/td>\nL\u1ed7i \u1edf ph\u00eda h\u1ea1 l\u01b0u ho\u1eb7c c\u01a1 ch\u1ebf b\u1ecb h\u01b0 h\u1ecfng<\/td>\nV\u1ecb tr\u00ed c\u1ee7a tay c\u1ea7m kh\u00f4ng th\u1ec3 t\u00e1ch r\u1eddi hai ph\u1ea7n n\u00e0y.<\/td>\nKh\u00f4ng v\u1eadn h\u00e0nh m\u00e1y trong th\u1eddi gian ch\u1edd \u0111\u1ee3i k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m ch\u00ednh th\u1ee9c.<\/td>\n<\/tr>\n
Nhi\u1ec7t \u0111\u1ed9 g\u1ea7n m\u1ed9t c\u1ef1c<\/td>\n\u0110\u1ed9 r\u00f2 r\u1ec9, \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn, \u0111\u01b0\u1eddng d\u00e2y ho\u1eb7c \u0111i\u1ec7n tr\u1edf b\u00ean trong<\/td>\nM\u1ee9c nhi\u1ec7t \u0111\u1ed9 kh\u00f4ng c\u00f3 t\u1ea3i kh\u00f4ng c\u00f3 t\u00ednh thuy\u1ebft ph\u1ee5c.<\/td>\nKi\u1ec3m tra \u0111\u01b0\u1eddng d\u1eabn hi\u1ec7n t\u1ea1i v\u00e0 c\u00e1c giai \u0111o\u1ea1n t\u01b0\u01a1ng t\u1ef1.<\/td>\n<\/tr>\n
Kh\u1eafc ho\u1eb7c theo d\u00f5i carbon<\/td>\nL\u1ed7i \u0111i\u1ec7n, nhi\u1ec5m b\u1ea9n ho\u1eb7c qu\u00e1 n\u00f3ng<\/td>\nNh\u1eefng h\u01b0 h\u1ea1i b\u00ean ngo\u00e0i c\u00f3 th\u1ec3 che gi\u1ea5u nh\u1eefng h\u01b0 h\u1ea1i b\u00ean trong.<\/td>\nLo\u1ea1i b\u1ecf kh\u1ecfi d\u1ecbch v\u1ee5 v\u00e0 tu\u00e2n th\u1ee7 h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Lu\u1eadt 80% c\u00f3 gi\u1ea3i th\u00edch nguy\u00ean nh\u00e2n c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng ng\u1eaft k\u1ebft n\u1ed1i li\u00ean t\u1ee5c kh\u00f4ng?<\/h3>\n

Kh\u00f4ng ph\u1ea3i ch\u1ec9 ri\u00eang n\u00f3. NFPA 70 th\u01b0\u1eddng quy \u0111\u1ecbnh k\u00edch c\u1ee1 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 cho c\u00e1c m\u1ea1ch nh\u00e1nh c\u00f3 t\u1ea3i kh\u00f4ng li\u00ean t\u1ee5c l\u00e0 100% v\u00e0 t\u1ea3i li\u00ean t\u1ee5c l\u00e0 125%, tr\u1eeb khi c\u00f3 thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i 100% v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng \u1ee9ng. \u0110\u00f3 l\u00e0 c\u01a1 s\u1edf cho gi\u1edbi h\u1ea1n th\u00f4ng th\u01b0\u1eddng l\u00e0 80% \u0111\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ti\u00eau chu\u1ea9n. \u0110\u00f3 v\u1eabn l\u00e0 m\u1ed9t ti\u00eau chu\u1ea9n thi\u1ebft k\u1ebf; hi\u1ec7n t\u1ea1i, th\u1eddi gian ho\u1ea1t \u0111\u1ed9ng, \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh, d\u00e2y d\u1eabn v\u00e0 \u0111\u1eb7c t\u00ednh c\u1ee7a thi\u1ebft b\u1ecb quy\u1ebft \u0111\u1ecbnh h\u00e0nh vi th\u1ef1c t\u1ebf.<\/p>\n

Vi\u1ec7c ki\u1ec3m tra \u0111\u1ea1t ti\u00eau chu\u1ea9n t\u00e1ch nhi\u1ec7t t\u1eeb k\u1ebft n\u1ed1i ra kh\u1ecfi nhi\u1ec7t t\u1eeb b\u1ed9 ng\u1eaft b\u00ean trong<\/h2>\n

M\u1ed9t h\u00ecnh \u1ea3nh nhi\u1ec7t \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

M\u1ed9t \u0111i\u1ec3m n\u00f3ng kh\u00f4ng x\u00e1c \u0111\u1ecbnh ngu\u1ed3n g\u1ed1c c\u1ee7a n\u00f3. So s\u00e1nh h\u1eefu \u00edch s\u1ebd t\u00ednh \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng, nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh, \u0111i\u1ec1u ki\u1ec7n thi\u1ebft b\u1ecb, \u0111\u1ed9 ph\u00e1t x\u1ea1 b\u1ec1 m\u1eb7t, g\u00f3c nh\u00ecn v\u00e0 c\u00e1c pha t\u01b0\u01a1ng t\u1ef1. Nhi\u1ec7t t\u1eadp trung t\u1ea1i m\u1ed9t \u0111\u1ea7u n\u1ed1i c\u00f3 th\u1ec3 cho th\u1ea5y v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i; nhi\u1ec7t b\u1eaft \u0111\u1ea7u t\u1eeb m\u1ed9t m\u1ed1i n\u1ed1i tr\u00ean \u0111\u01b0\u1eddng d\u1eabn c\u00f3 th\u1ec3 cho th\u1ea5y v\u1ea5n \u0111\u1ec1 \u1edf n\u01a1i kh\u00e1c; m\u1ed9t m\u00f4 h\u00ecnh t\u1eadp trung \u1edf \u0111\u1ea7u ng\u1eaft c\u00f3 th\u1ec3 cho th\u1ea5y \u0111i\u1ec7n tr\u1edf b\u00ean trong. S\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng t\u1ea3i c\u0169ng c\u00f3 th\u1ec3 l\u00e0m n\u00f3ng m\u1ed9t pha.<\/p>\n

Thermography l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 s\u00e0ng l\u1ecdc v\u00e0 d\u1ef1 b\u00e1o xu h\u01b0\u1edbng, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t k\u1ebft qu\u1ea3 c\u00f3 hay kh\u00f4ng. Vi\u1ec7c theo d\u00f5i c\u00f3 th\u1ec3 bao g\u1ed3m vi\u1ec7c ki\u1ec3m tra s\u1ef1 li\u00ean k\u1ebft \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1eaft k\u1ebft n\u1ed1i, vi\u1ec7c x\u00e1c minh m\u00f4-men xo\u1eafn theo quy \u0111\u1ecbnh c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t, ho\u1eb7c vi\u1ec7c \u0111o \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac. Vi\u1ec7c l\u01b0u gi\u1eef h\u00ecnh \u1ea3nh v\u1edbi c\u00e1c gi\u00e1 tr\u1ecb hi\u1ec7n t\u1ea1i v\u00e0 k\u1ebft qu\u1ea3 s\u1ebd gi\u00fap b\u1ed9 ph\u1eadn mua h\u00e0ng c\u00f3 th\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c \u0111i\u1ec3m tr\u1ee5c tr\u1eb7c th\u1ef1c s\u1ef1.<\/p>\n

T\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 ki\u1ec3m tra \u0111i\u1ec7n \u00e1p th\u1ef1c s\u1ef1 c\u00f3 th\u1ec3 ch\u1ee9ng minh \u0111\u01b0\u1ee3c \u0111i\u1ec1u g\u00ec?<\/h3>\n

Vi\u1ec7c ki\u1ec3m tra t\u00ednh li\u00ean t\u1ee5c c\u00f3 th\u1ec3 cho th\u1ea5y r\u1eb1ng m\u1ed9t c\u1ef1c b\u1ecb ng\u1eaft \u0111i\u1ec7n \u0111ang m\u1edf ho\u1eb7c \u0111\u00f3ng, nh\u01b0ng kh\u00f4ng th\u1ec3 x\u00e1c nh\u1eadn th\u1eddi gian ng\u1eaft ch\u00ednh x\u00e1c, l\u00e0m gi\u00e1n \u0111o\u1ea1n ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c h\u00e0nh vi d\u01b0\u1edbi t\u1ea3i. Vi\u1ec7c ki\u1ec3m tra \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 cho th\u1ea5y s\u1ef1 kh\u00e1c bi\u1ec7t b\u1ea5t ng\u1edd, nh\u01b0ng c\u1ea5u h\u00ecnh m\u1ea1ch, \u0111i\u1ec7n \u00e1p g\u00e2y ra v\u00e0 v\u1ecb tr\u00ed \u0111o \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3. C\u1ea3 hai th\u1eed nghi\u1ec7m n\u00e0y \u0111\u1ec1u kh\u00f4ng x\u00e1c nh\u1eadn ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7.<\/p>\n

ANSI\/NETA ATS v\u00e0 MTS cung c\u1ea5p c\u00e1c khu\u00f4n kh\u1ed5 \u0111\u1ec3 ki\u1ec3m tra ch\u1ea5p nh\u1eadn v\u00e0 b\u1ea3o tr\u00ec; c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft l\u1eadp c\u00e1c quy tr\u00ecnh v\u00e0 gi\u1edbi h\u1ea1n c\u1ee5 th\u1ec3 cho t\u1eebng thi\u1ebft b\u1ecb. Nh\u00e2n vi\u00ean c\u00f3 \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c bi\u1ec7n ph\u00e1p ki\u1ec3m tra c\u01a1 h\u1ecdc, c\u00e1ch \u0111i\u1ec7n ho\u1eb7c \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac, c\u0169ng nh\u01b0 vi\u1ec7c ti\u00eam ch\u00edch ch\u00ednh ho\u1eb7c th\u1ee9 c\u1ea5p \u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh. M\u1ed9t thi\u1ebft b\u1ecb ng\u1eaft nhi\u1ec7t c\u1ea7n k\u1ebft qu\u1ea3 d\u00f2ng \u0111i\u1ec7n theo th\u1eddi gian so v\u1edbi d\u1eef li\u1ec7u d\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3, kh\u00f4ng ph\u1ea3i l\u00e0 vi\u1ec7c gia nhi\u1ec7t kh\u00f4ng chu\u1ea9n. K\u1ebft qu\u1ea3 n\u1eb1m ngo\u00e0i gi\u1edbi h\u1ea1n quy \u0111\u1ecbnh h\u1ed7 tr\u1ee3 vi\u1ec7c s\u1eeda ch\u1eefa ho\u1eb7c thay th\u1ebf, trong khi m\u1ed9t b\u00e0i ki\u1ec3m tra qua l\u1ea1i kh\u00f4ng cho th\u1ea5y c\u00f3 s\u1ef1 n\u1ed1i ti\u1ebfp b\u1ecb h\u01b0 h\u1ecfng.<\/p>\n

Quy\u1ebft \u0111\u1ecbnh thay th\u1ebf n\u00ean \u0111\u1ecbnh h\u00ecnh c\u00e1c th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ti\u1ebfp theo<\/h2>\n

Thi\u1ebft b\u1ecb ng\u1eaft \u0111i\u1ec7n ti\u1ebfp x\u00fac v\u1edbi d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c \u0111\u01b0a tr\u1edf l\u1ea1i ho\u1ea1t \u0111\u1ed9ng ch\u1ec9 v\u00ec n\u00f3 \u0111\u00e3 \u0111\u01b0\u1ee3c reset. \u0110\u0103ng k\u00fd l\u1ea1i l\u1ed7i, ho\u1ea1t \u0111\u1ed9ng c\u1ee7a thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7, t\u00ecnh tr\u1ea1ng v\u00e0 k\u1ebft qu\u1ea3 ki\u1ec3m tra, sau \u0111\u00f3 tu\u00e2n th\u1ee7 h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 ch\u01b0\u01a1ng tr\u00ecnh b\u1ea3o tr\u00ec. C\u00e1c d\u1ea5u hi\u1ec7u nh\u01b0 n\u1ee9t, carbon h\u00f3a, \u0111\u1ea7u n\u1ed1i b\u1ecb h\u01b0 h\u1ecfng, ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c k\u1ebft qu\u1ea3 v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n \u0111\u1ec1u l\u00e0 l\u00fd do \u0111\u1ec3 thay th\u1ebf thi\u1ebft b\u1ecb. Vi\u1ec7c t\u00e1i s\u1eed d\u1ee5ng c\u1ea7n c\u00f3 b\u1eb1ng ch\u1ee9ng r\u00f5 r\u00e0ng v\u1ec1 t\u00ednh ph\u00f9 h\u1ee3p.<\/p>\n

Khi c\u1ea7n thay th\u1ebf, thi\u1ebft b\u1ecb m\u1edbi ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi \u1ee9ng d\u1ee5ng, kh\u00f4ng ch\u1ec9 ph\u1ea3i c\u00f3 k\u00edch th\u01b0\u1edbc khung ho\u1eb7c c\u00f3 ghi nh\u00e3n amp\u00e9re. L\u1ef1a ch\u1ecdn c\u1ea7u dao \u0111i\u1ec7n mini<\/strong> \u0110\u00e1nh gi\u00e1 n\u00ean bao g\u1ed3m c\u00e1c th\u00f4ng s\u1ed1 v\u1ec1 c\u1ef1c \u0111i\u1ec7n, \u0111i\u1ec7n \u00e1p, d\u00f2ng \u0111i\u1ec7n, \u0111\u1eb7c t\u00ednh ng\u1eaft, kh\u1ea3 n\u0103ng ng\u1eaft, c\u00e1c \u0111\u1ea7u n\u1ed1i, c\u00e1ch l\u1eafp \u0111\u1eb7t, v\u1ecf b\u1ecdc, \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh v\u00e0 ph\u1ed1i h\u1ee3p b\u1ea3o v\u1ec7.<\/p>\n\n\n\n\n\n\n\n\n\n
\u0110i\u1ec3m quy\u1ebft \u0111\u1ecbnh<\/th>\nCh\u1ee9ng c\u1ee9 c\u1ea7n thi\u1ebft<\/th>\nHo\u1ea1t \u0111\u1ed9ng mua s\u1eafm ho\u1eb7c b\u1ea3o tr\u00ec<\/th>\n<\/tr>\n<\/thead>\n
\u0110\u01b0\u1eddng cong t\u1ea3i v\u00e0 \u0111i\u1ec3m d\u1eebng<\/td>\nC\u1ea5u h\u00ecnh t\u1ea3i, d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng v\u00e0 t\u00ednh to\u00e1n<\/td>\nCh\u1ecdn kh\u00f4ng che ch\u1eafn \u0111\u1ec3 tr\u00e1nh qu\u00e1 t\u1ea3i.<\/td>\n<\/tr>\n
Kh\u1ea3 n\u0103ng ng\u1eaft k\u1ebft n\u1ed1i<\/td>\nNghi\u00ean c\u1ee9u d\u00f2ng \u0111i\u1ec7n sai l\u1ec7ch t\u1ea1i v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t<\/td>\nPh\u00f9 h\u1ee3p v\u1edbi m\u1ee9c \u0111\u1ed9 l\u1ed7i c\u00f3 s\u1eb5n.<\/td>\n<\/tr>\n
T\u00ednh t\u01b0\u01a1ng th\u00edch c\u1ee7a k\u1ebft n\u1ed1i<\/td>\nTh\u00f4ng tin v\u1ec1 \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, tr\u1ea1m \u0111\u1ea7u cu\u1ed1i, xe bu\u00fdt v\u00e0 l\u1eafp \u0111\u1eb7t<\/td>\nS\u1eeda ch\u1eefa c\u00e1c d\u00e2y d\u1eabn ho\u1eb7c m\u1ed1i n\u1ed1i b\u1ecb h\u01b0 h\u1ecfng.<\/td>\n<\/tr>\n
Ti\u00eau chu\u1ea9n s\u1ea3n ph\u1ea9m<\/td>\nTh\u1ecb tr\u01b0\u1eddng, lo\u1ea1i thi\u1ebft b\u1ecb v\u00e0 c\u00e1c t\u00e0i li\u1ec7u<\/td>\nKi\u1ec3m tra ti\u00eau chu\u1ea9n v\u00e0 tuy\u00ean b\u1ed1 \u00e1p d\u1ee5ng.<\/td>\n<\/tr>\n
K\u1ef7 l\u1ee5c v\u1ec1 vi\u1ec7c tr\u1edf l\u1ea1i ph\u1ee5c v\u1ee5<\/td>\nNguy\u00ean nh\u00e2n, k\u1ebft qu\u1ea3, c\u00e1c b\u1ed9 ph\u1eadn v\u00e0 l\u1ecbch tr\u00ecnh l\u1eafp r\u00e1p<\/td>\nH\u00e3y gi\u1eef nguy\u00ean m\u1ed9t ti\u00eau chu\u1ea9n c\u01a1 b\u1ea3n cho xu h\u01b0\u1edbng v\u00e0 c\u00e1c ph\u1ee5 t\u00f9ng thay th\u1ebf.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C\u00e1c ti\u00eau chu\u1ea9n n\u00e0o \u00e1p d\u1ee5ng cho vi\u1ec7c thay th\u1ebf?<\/h3>\n

Ti\u00eau chu\u1ea9n UL 489 bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch d\u1ea1ng v\u1ecf b\u1ecdc v\u00e0 c\u00e1c thi\u1ebft b\u1ecb li\u00ean quan trong ph\u1ea1m vi \u00e1p d\u1ee5ng c\u1ee7a n\u00f3. Ti\u00eau chu\u1ea9n IEC 60898-1 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft d\u00f2ng \u0111i\u1ec7n qu\u00e1 d\u00f2ng cho c\u00e1c h\u1ec7 th\u1ed1ng gia \u0111\u00ecnh v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng t\u01b0\u01a1ng t\u1ef1; ti\u00eau chu\u1ea9n IEC 60947-2 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft d\u00f2ng \u0111i\u1ec7n \u00e1p th\u1ea5p cho c\u00e1c \u1ee9ng d\u1ee5ng c\u00f4ng nghi\u1ec7p. C\u00e1c ti\u00eau chu\u1ea9n, lo\u1ea1i s\u1ea3n ph\u1ea9m, c\u00e1ch l\u1eafp \u0111\u1eb7t v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng \u00e1p d\u1ee5ng. Ch\u1ec9 m\u1ed9t t\u00e0i li\u1ec7u tham kh\u1ea3o v\u1ec1 ti\u00eau chu\u1ea9n l\u00e0 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 ch\u1ee9ng nh\u1eadn ho\u1eb7c x\u00e1c nh\u1eadn t\u00ednh ph\u00f9 h\u1ee3p, v\u00ec v\u1eady ng\u01b0\u1eddi mua n\u00ean ki\u1ec3m tra c\u00e1c t\u00e0i li\u1ec7u c\u1ee5 th\u1ec3 cho t\u1eebng m\u1eabu.<\/p>\n

CHAC Electric c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 l\u1ef1a ch\u1ecdn s\u1ea3n ph\u1ea9m \u0111i\u1ec7n \u00e1p th\u1ea5p th\u00f4ng qua t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng v\u00e0 \u1ee9ng d\u1ee5ng. Ng\u01b0\u1eddi mua n\u00ean \u0111\u00e1nh gi\u00e1 c\u00e1c t\u00e0i li\u1ec7u n\u00e0y d\u1ef1a tr\u00ean thi\u1ebft k\u1ebf \u0111i\u1ec7n, nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p, y\u00eau c\u1ea7u th\u1ecb tr\u01b0\u1eddng v\u00e0 quy tr\u00ecnh l\u1ef1a ch\u1ecdn linh ki\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n

\"B\u1ed9
Tham kh\u1ea3o s\u1ea3n ph\u1ea9m \u0111\u1ec3 l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb \u0111i\u1ec7n \u00e1p th\u1ea5p ph\u00f9 h\u1ee3p v\u1edbi d\u1ef1 \u00e1n.<\/figcaption><\/figure>\n

M\u1ed9t b\u1ea3n ghi thay th\u1ebf \u0111\u00e1ng \u0111\u1ec3 bi\u1ec7n h\u1ed9 n\u00ean bao g\u1ed3m nh\u1eefng g\u00ec<\/h2>\n

Tr\u01b0\u1edbc khi \u0111\u1eb7t h\u00e0ng m\u1ed9t s\u1ea3n ph\u1ea9m thay th\u1ebf, h\u00e3y gi\u1eef K\u1ef7 l\u1ee5c th\u1eed nghi\u1ec7m thi\u1ebft b\u1ecb ng\u1eaft \u0111i\u1ec7n<\/strong> \u0111\u00f3 l\u00e0 vi\u1ec7c x\u00e1c \u0111\u1ecbnh m\u1ea1ch \u0111i\u1ec7n, th\u1eddi gian s\u1ef1 ki\u1ec7n, t\u1ea3i \u0111i\u1ec7n ho\u1ea1t \u0111\u1ed9ng v\u00e0o th\u1eddi \u0111i\u1ec3m \u0111\u00f3, t\u00ecnh tr\u1ea1ng hi\u1ec3n th\u1ecb, c\u00e1c quan s\u00e1t v\u1ec1 nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c \u0111i\u1ec7n \u00e1p c\u1ee7a thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i, v\u00e0 ph\u01b0\u01a1ng ph\u00e1p th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c ng\u01b0\u1eddi c\u00f3 th\u1ea9m quy\u1ec1n s\u1eed d\u1ee5ng. \u0110i\u1ec1u n\u00e0y bi\u1ebfn vi\u1ec7c \u201cb\u1ea1n c\u1ea7u th\u1ee7 v\u1eabn b\u1eadt c\u1ea7u\u201d th\u00e0nh b\u1eb1ng ch\u1ee9ng c\u00f3 th\u1ec3 so s\u00e1nh v\u1edbi l\u1ecbch tr\u00ecnh v\u00e0 nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n.<\/p>\n

N\u1ebfu ghi ch\u00e9p cho th\u1ea5y qu\u00e1 tr\u00ecnh s\u01b0\u1edfi \u1ea5m di\u1ec5n ra nhi\u1ec1u l\u1ea7n, kh\u00f4ng c\u00f2n c\u00f4ng su\u1ea5t d\u1ef1 ph\u00f2ng ho\u1eb7c t\u1ea3i tr\u1ecdng thay \u0111\u1ed5i, h\u00e3y so s\u00e1nh k\u1ebft qu\u1ea3 v\u1edbi th\u00f4ng s\u1ed1 H\u01b0\u1edbng d\u1eabn l\u1eadp k\u1ebf ho\u1ea1ch n\u00e2ng c\u1ea5p b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/a> tr\u01b0\u1edbc khi ch\u1ecdn m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 c\u1ea5p \u0111i\u1ec7n cao h\u01a1n. M\u1ed9t nh\u00e3n \u0111i\u1ec7n tr\u1edf l\u1edbn h\u01a1n kh\u00f4ng th\u1ec3 kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c s\u1ef1 thi\u1ebfu h\u1ee5t c\u1ee7a d\u00e2y d\u1eabn, s\u1ef1 k\u1ebft n\u1ed1i kh\u00f4ng ch\u1eafc ch\u1eafn, s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch d\u00f2ng \u0111i\u1ec7n, ho\u1eb7c v\u1ecb tr\u00ed b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi thi\u1ebft b\u1ecb ng\u1eaft d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t.<\/p>\n

Nh\u1eefng c\u00e2u h\u1ecfi ph\u1ed5 bi\u1ebfn v\u1ec1 t\u00ecnh tr\u1ea1ng c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch<\/h2>\n

C\u00f3 nh\u1eefng d\u1ea5u hi\u1ec7u n\u00e0o cho th\u1ea5y c\u1ea7u dao \u0111i\u1ec7n \u0111\u00e3 b\u1ecb h\u1ecfng?<\/h3>\n

C\u00e1c chuy\u1ebfn \u0111i kh\u00f4ng r\u00f5 nguy\u00ean nh\u00e2n l\u1eb7p \u0111i l\u1eb7p l\u1ea1i, vi\u1ec7c kh\u00f4ng tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh, h\u01b0 h\u1ecfng, nhi\u1ec7t \u0111\u1ed9, m\u00f9i ho\u1eb7c k\u1ebft qu\u1ea3 ki\u1ec3m tra v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n l\u00e0 nh\u1eefng d\u1ea5u hi\u1ec7u c\u1ea3nh b\u00e1o. B\u1edfi v\u00ec c\u00e1c s\u1ef1 c\u1ed1 qu\u00e1 t\u1ea3i, l\u1ed7i d\u00e2y \u0111i\u1ec7n v\u00e0 k\u1ebft n\u1ed1i k\u00e9m c\u00f3 th\u1ec3 c\u00f3 v\u1ebb t\u01b0\u01a1ng t\u1ef1 nhau, n\u00ean n\u00ean s\u1eed d\u1ee5ng d\u1eef li\u1ec7u s\u1ef1 ki\u1ec7n, ki\u1ec3m tra v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra th\u00edch h\u1ee3p.<\/p>\n

Lu\u1eadt 80% c\u1ee7a c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch l\u00e0 g\u00ec?<\/h3>\n

\u0110\u00e2y l\u00e0 c\u00e1ch vi\u1ebft t\u1eaft c\u1ee7a ph\u00e9p t\u00ednh 125% theo ti\u00eau chu\u1ea9n NFPA 70 \u0111\u1ed1i v\u1edbi t\u1ea3i li\u00ean t\u1ee5c, cho th\u1ea5y gi\u1edbi h\u1ea1n t\u1ea3i l\u00e0 80% \u0111\u1ed1i v\u1edbi m\u1ed9t thi\u1ebft b\u1ecb \u0111i\u1ec3n h\u00ecnh. C\u00e1c c\u1ee5m l\u1eafp \u0111\u1ea1t ti\u00eau chu\u1ea9n 100% c\u00f3 c\u00e1c \u0111i\u1ec1u ki\u1ec7n c\u1ee5 th\u1ec3, v\u00ec v\u1eady 80% kh\u00f4ng ph\u1ea3i l\u00e0 ng\u01b0\u1ee1ng d\u1eebng ho\u1ea1t \u0111\u1ed9ng chung.<\/p>\n

C\u00e1c chuy\u00ean gia ki\u1ec3m tra b\u1ed9 ng\u1eaft m\u1ea1ch nhi\u1ec7t nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n

H\u1ecd s\u1eed d\u1ee5ng ngu\u1ed3n d\u00f2ng \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n v\u00e0 so s\u00e1nh th\u1eddi gian t\u1eaft b\u1eadt \u0111o \u0111\u01b0\u1ee3c v\u1edbi d\u1eef li\u1ec7u d\u00f2ng \u0111i\u1ec7n v\u00e0 th\u1eddi gian \u0111\u00e3 c\u00f4ng b\u1ed1 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t trong c\u00e1c \u0111i\u1ec1u ki\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh. Ch\u1ec9 ri\u00eang s\u1ef1 li\u00ean t\u1ee5c kh\u00f4ng th\u1ec3 ki\u1ec3m tra ch\u1ee9c n\u0103ng t\u1eaft b\u1eadt nhi\u1ec7t, v\u00e0 c\u00e1c ngu\u1ed3n nhi\u1ec7t t\u1ef1 ch\u1ebf c\u0169ng kh\u00f4ng th\u1ec3 cung c\u1ea5p k\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c hi\u1ec7u chu\u1ea9n ho\u1eb7c an to\u00e0n.<\/p>\n

L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ki\u1ec3m tra xem c\u1ea7u MCB c\u00f3 h\u1ecfng hay kh\u00f4ng?<\/h3>\n

H\u00e3y l\u01b0u gi\u1eef nh\u1eadt k\u00fd chuy\u1ebfn \u0111i v\u00e0 c\u00f3 ng\u01b0\u1eddi c\u00f3 tr\u00ecnh \u0111\u1ed9 chuy\u00ean m\u00f4n \u0111\u1ec3 lo\u1ea1i tr\u1eeb tr\u01b0\u1eddng h\u1ee3p qu\u00e1 t\u1ea3i, l\u1ed7i d\u00f2ng ch\u1ea3y v\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i. Tu\u00e2n th\u1ee7 quy tr\u00ecnh ki\u1ec3m tra c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t; thay th\u1ebf MCB khi ph\u00e1t hi\u1ec7n h\u01b0 h\u1ecfng, ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng \u1ed5n \u0111\u1ecbnh ho\u1eb7c hi\u1ec7u su\u1ea5t v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n cho ph\u00e9p.<\/p>\n

Khi n\u00e0o m\u1ed9t c\u01a1 s\u1edf n\u00ean g\u1ecdi th\u1ee3 \u0111i\u1ec7n thay v\u00ec reset c\u00f4ng t\u1eafc \u0111i\u1ec7n?<\/h3>\n

Trong tr\u01b0\u1eddng h\u1ee3p x\u1ea3y ra c\u00e1c s\u1ef1 c\u1ed1 kh\u00f4ng r\u00f5 nguy\u00ean nh\u00e2n ho\u1eb7c l\u1eb7p \u0111i l\u1eb7p l\u1ea1i, kh\u00f4ng duy tr\u00ec c\u00e0i \u0111\u1eb7t \u0111\u00fang, nhi\u1ec7t \u0111\u1ed9 qu\u00e1 cao, m\u00f9i h\u00f4i, ti\u1ebfng \u1ed3n, h\u01b0 h\u1ecfng ho\u1eb7c l\u1ed7i nghi\u00eam tr\u1ecdng. Nh\u00e2n vi\u00ean kh\u00f4ng \u0111\u01b0\u1ee3c th\u00e1o n\u1eafp, ch\u1ea1m v\u00e0o c\u00e1c b\u1ed9 ph\u1eadn \u0111ang ho\u1ea1t \u0111\u1ed9ng ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c b\u00e0i ki\u1ec3m tra tr\u00ean b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ea5p ph\u00e9p v\u00e0 tu\u00e2n th\u1ee7 quy tr\u00ecnh \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t.<\/p>\n

Tham kh\u1ea3o<\/h2>\n
    \n
  1. NFPA 70: Quy chu\u1ea9n \u0111i\u1ec7n qu\u1ed1c gia<\/a><\/li>\n
  2. NFPA 70B: Ti\u00eau chu\u1ea9n b\u1ea3o tr\u00ec thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/a><\/li>\n
  3. Hi\u1ec7p h\u1ed9i th\u1eed nghi\u1ec7m \u0111i\u1ec7n qu\u1ed1c t\u1ebf: ANSI\/NETA ATS v\u00e0 MTS<\/a><\/li>\n
  4. UL Solutions: M\u00e1y c\u1eaft \u0111i\u1ec7n v\u00e0 ti\u00eau chu\u1ea9n UL 489<\/a><\/li>\n
  5. IEC 60947-2: Thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch v\u00e0 thi\u1ebft b\u1ecb \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p th\u1ea5p<\/a><\/li>\n<\/ol>\n

    Nh\u1eefng quy\u1ebft \u0111\u1ecbnh \u0111\u00e1ng tin c\u1eady b\u1eaft \u0111\u1ea7u t\u1eeb m\u1ed9t b\u1ea3n ghi: l\u01b0u gi\u1eef s\u1ef1 ki\u1ec7n, x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1eddng d\u1eabn g\u00e2y l\u1ed7i v\u00e0 chuy\u1ec3n c\u00e1c b\u1eb1ng ch\u1ee9ng v\u00e0o trong b\u1ea3n ghi. T\u1ea1i giai \u0111o\u1ea1n l\u1ef1a ch\u1ecdn cu\u1ed1i c\u00f9ng, h\u00e3y xem x\u00e9t l\u1ea1i B\u1ed9 ng\u1eaft m\u1ea1ch c\u1ee1 nh\u1ecf CQB2-63<\/a> v\u00e0 li\u00ean h\u1ec7 v\u1edbi CHAC Electric v\u1ec1 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng d\u1ef1 \u0111\u1ecbnh.<\/p>","protected":false},"excerpt":{"rendered":"

    T\u00ecm hi\u1ec3u c\u00e1ch m\u00e0 l\u1ecbch s\u1eed chuy\u1ebfn \u0111i, b\u1eb1ng ch\u1ee9ng nhi\u1ec7t \u0111\u1ed9 v\u00e0 c\u00e1c th\u1eed nghi\u1ec7m chuy\u00ean nghi\u1ec7p gi\u00fap ph\u00e2n bi\u1ec7t m\u1ed9t thi\u1ebft b\u1ecb r\u00f2 r\u1ec9 \u0111i\u1ec7n v\u1edbi c\u00e1c tr\u01b0\u1eddng h\u1ee3p qu\u00e1 t\u1ea3i, l\u1ed7i d\u00e2y \u0111i\u1ec7n v\u00e0 v\u1ea5n \u0111\u1ec1 k\u1ebft n\u1ed1i.<\/p>","protected":false},"author":1,"featured_media":3973,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[137,139,146,147],"class_list":["post-3930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-circuit-breaker-troubleshooting","tag-electrical-maintenance","tag-commercial-facilities","tag-low-voltage-distribution"],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":8}},"acf":[],"_links":{"self":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/comments?post=3930"}],"version-history":[{"count":9,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3930\/revisions"}],"predecessor-version":[{"id":4416,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/posts\/3930\/revisions\/4416"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/media\/3973"}],"wp:attachment":[{"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/media?parent=3930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/categories?post=3930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chac-electric.com\/vi\/wp-json\/wp\/v2\/tags?post=3930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}