{"id":3571,"date":"2026-08-08T15:23:36","date_gmt":"2026-08-08T15:23:36","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=3571"},"modified":"2026-08-08T15:23:38","modified_gmt":"2026-08-08T15:23:38","slug":"which-type-of-circuit-breaker-is-designed-to-be-reconditioned","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/which-type-of-circuit-breaker-is-designed-to-be-reconditioned\/","title":{"rendered":"Lo\u1ea1i B\u1ed9 Ng\u1eaft M\u1ea1ch N\u00e0o \u0110\u01b0\u1ee3c Thi\u1ebft K\u1ebf \u0110\u1ec3 \u0110\u01b0\u1ee3c T\u00e2n Trang?"},"content":{"rendered":"<p>Trong tr\u01b0\u1eddng h\u1ee3p c\u01a1 s\u1edf c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft l\u1ed7i th\u1eddi, b\u1ea1n c\u00f3 th\u1ec3 th\u1eafc m\u1eafc li\u1ec7u c\u00f3 th\u1ec3 t\u00e2n trang l\u1ea1i c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch hay n\u00ean mua thi\u1ebft b\u1ecb m\u1edbi ho\u00e0n to\u00e0n. C\u00e2u tr\u1ea3 l\u1eddi kh\u00f4ng \u0111\u01a1n gi\u1ea3n, v\u00ec n\u00f3 ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch trong c\u01a1 s\u1edf c\u1ee7a b\u1ea1n. Theo Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC) n\u0103m 2020, c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p, b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p trung b\u00ecnh v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p cao \u0111\u01b0\u1ee3c ph\u00e9p ph\u1ee5c h\u1ed3i trong khi c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac (MCCB), b\u1ed9 ng\u1eaft m\u1ea1ch GFCI v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch AFCI kh\u00f4ng n\u00ean \u0111\u01b0\u1ee3c l\u00e0m m\u1edbi theo \u0110i\u1ec1u 210.15 v\u00e0 M\u1ee5c 240.88 c\u1ee7a NEC. Do \u0111\u00f3, s\u1ef1 ph\u00e2n bi\u1ec7t n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c qu\u1ea3n l\u00fd nh\u00e0 m\u00e1y, nh\u00e0 th\u1ea7u \u0111i\u1ec7n v\u00e0 k\u1ef9 s\u01b0 b\u1ea3o tr\u00ec c\u1ea7n c\u00e2n b\u1eb1ng chi ph\u00ed v\u1edbi an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 quy chu\u1ea9n.<\/p>\n<blockquote><p><strong>Tr\u1ea3 l\u1eddi nhanh:<\/strong> C\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e2n trang bao g\u1ed3m b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p, b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p trung b\u00ecnh v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p cao. B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c t\u00e2n trang nh\u01b0 quy \u0111\u1ecbnh t\u1ea1i NEC 240.88(A)(1), v\u00e0 b\u1ea5t k\u1ef3 b\u1ed9 ng\u1eaft m\u1ea1ch n\u00e0o cung c\u1ea5p b\u1ea3o v\u1ec7 GFCI, b\u1ea3o v\u1ec7 AFCI ho\u1eb7c GFPE \u0111\u1ec1u b\u1ecb c\u1ea5m theo NEC 210.15. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e1ng ch\u00fa \u00fd cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00e2n trang t\u1ea1i nh\u00e0 m\u00e1y bao g\u1ed3m: Eaton, ABB v\u00e0 Schneider Electric \/ Square D. Qu\u00e1 tr\u00ecnh t\u00e2n trang tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh c\u1ee7a IEEE C37.59 v\u00e0 NEMA AB 4. Th\u00f4ng th\u01b0\u1eddng, chi ph\u00ed t\u00e2n trang b\u1eb1ng 40-60% chi ph\u00ed c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch m\u1edbi v\u00e0 k\u00e9o d\u00e0i th\u00eam 10-20 n\u0103m tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng.<\/p><\/blockquote>\n<h2>C\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf<\/h2>\n<p>Theo M\u1ee5c 240.88(A) c\u1ee7a NEC 2020, c\u00e1c <strong>lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch<\/strong> sau \u0111\u00e2y \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf r\u00f5 r\u00e0ng:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3573\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/Circuit-Breaker-Types-Permitted-for-Reconditioning.webp\" alt=\"C\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i C\u1ea7u Dao<\/th>\n<th>Tham chi\u1ebfu NEC<\/th>\n<th>\u1ee8ng d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>D\u1ea3i \u0110i\u1ec7n \u00c1p<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>B\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p<\/strong><\/td>\n<td>88(A)(2)<\/td>\n<td>B\u1ed9 ng\u1eaft m\u1ea1ch r\u00fat ra trong thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft, b\u1ed9 ng\u1eaft m\u1ea1ch d\u1ecbch v\u1ee5 ch\u00ednh<\/td>\n<td>L\u00ean \u0111\u1ebfn 1.000V AC<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p trung b\u00ecnh<\/strong><\/td>\n<td>88(A)(3)<\/td>\n<td>Tr\u1ea1m bi\u1ebfn \u00e1p c\u00f4ng nghi\u1ec7p, ph\u00e2n ph\u1ed1i c\u01a1 s\u1edf l\u1edbn<\/td>\n<td>000V \u2013 38kV<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p cao<\/strong><\/td>\n<td>88(A)(3)<\/td>\n<td>Tr\u1ea1m bi\u1ebfn \u00e1p quy m\u00f4 ti\u1ec7n \u00edch, truy\u1ec1n t\u1ea3i<\/td>\n<td>Tr\u00ean 38kV<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n v\u00e0 c\u00e1c ph\u1ea7n thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft<\/strong><\/td>\n<td>8(B), 490.49<\/td>\n<td>Hi\u1ec7n \u0111\u1ea1i h\u00f3a to\u00e0n b\u1ed9 d\u00f2ng thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft<\/td>\n<td>Nhi\u1ec1u lo\u1ea1i<\/td>\n<\/tr>\n<tr>\n<td><strong>R\u01a1 le b\u1ea3o v\u1ec7 \u0111i\u1ec7n c\u01a1 &amp; CT<\/strong><\/td>\n<td>88(B)(2)<\/td>\n<td>H\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 trong tr\u1ea1m bi\u1ebfn \u00e1p<\/td>\n<td>Nhi\u1ec1u lo\u1ea1i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1eb7c \u0111i\u1ec3m ch\u00ednh chung c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c <strong>b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 t\u00e1i ch\u1ebf<\/strong> l\u00e0 ch\u00fang <strong>thu\u1ed9c lo\u1ea1i r\u00fat ra ho\u1eb7c c\u00f3 th\u1ec3 th\u00e1o r\u1eddi<\/strong> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf cho vi\u1ec7c b\u1ea3o tr\u00ec \u2014 kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c \u0111\u01a1n v\u1ecb k\u00edn. B\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p th\u1ea5p, nh\u01b0 nh\u1eefng b\u1ed9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong <a href=\"https:\/\/huyuglobal.com\/vi\/product\/huw9-690v-6300a-air-circuit-breaker\/\">b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng kh\u00ed c\u00f3 \u0111\u1ecbnh m\u1ee9c l\u00ean \u0111\u1ebfn 6300A<\/a>, \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t v\u1edbi c\u01a1 ch\u1ebf c\u00f3 th\u1ec3 b\u1ea3o tr\u00ec t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 thay th\u1ebf v\u00e0 b\u1ed9 ph\u1eadn trip d\u1ec5 ti\u1ebfp c\u1eadn. \u0110i\u1ec1u n\u00e0y ho\u00e0n to\u00e0n kh\u00e1c v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac, v\u1ed1n \u0111\u01b0\u1ee3c ni\u00eam phong t\u1ea1i nh\u00e0 m\u00e1y.<\/p>\n<h3>T\u1ea1i sao b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u00e1p c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf<\/h3>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 cho ph\u00e9p b\u1ea3o tr\u00ec. C\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a ch\u00fang bao g\u1ed3m:<\/p>\n<ul>\n<li>Ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 thay th\u1ebf \u2013 c\u00f3 th\u1ec3 ki\u1ec3m tra v\u00e0 thay th\u1ebf ti\u1ebfp \u0111i\u1ec3m h\u1ed3 quang v\u00e0 ti\u1ebfp \u0111i\u1ec3m ch\u00ednh<\/li>\n<li>C\u01a1 ch\u1ebf v\u1eadn h\u00e0nh d\u1ec5 ti\u1ebfp c\u1eadn \u2013 c\u00f3 th\u1ec3 b\u1ea3o tr\u00ec l\u00f2 xo, li\u00ean k\u1ebft v\u00e0 ch\u1ed1t c\u1ee7a c\u00f4ng t\u1eafc<\/li>\n<li>\u0110\u01a1n v\u1ecb ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 thay th\u1ebf \u2013 c\u00f3 th\u1ec3 n\u00e2ng c\u1ea5p c\u00e1c \u0111\u01a1n v\u1ecb ng\u1eaft m\u1ea1ch \u0111i\u1ec7n t\u1eed c\u1ee7a c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li>Thi\u1ebft k\u1ebf r\u00fat ra \u2013 b\u1ed9 ng\u1eaft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u00e1o ra kh\u1ecfi b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n m\u00e0 kh\u00f4ng c\u1ea7n t\u1eaft ngu\u1ed3n \u0111i\u1ec7n<\/li>\n<li>H\u1ec7 th\u1ed1ng c\u00e1ch \u0111i\u1ec7n r\u1ed9ng r\u00e3i \u2013 l\u1edbp c\u00e1ch \u0111i\u1ec7n hi\u1ec7n c\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch, ki\u1ec3m tra v\u00e0 ph\u1ee5c h\u1ed3i<\/li>\n<\/ul>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa c\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft, h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/what-is-mccb-and-mcb\/\">MCCB v\u00e0 MCB l\u00e0 g\u00ec<\/a> bao g\u1ed3m c\u00e1c kh\u00e1c bi\u1ec7t v\u1ec1 c\u1ea5u tr\u00fac quy\u1ebft \u0111\u1ecbnh kh\u1ea3 n\u0103ng b\u1ea3o tr\u00ec.<\/p>\n<h2 id=\"prohibited-types\">C\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ecb c\u1ea5m t\u00e1i ch\u1ebf<\/h2>\n<p>Theo NEC 2020, c\u00f3 nh\u1eefng thi\u1ebft b\u1ecb b\u1ecb c\u1ea5m t\u00e1i ch\u1ebf. C\u00e1c l\u1ec7nh c\u1ea5m n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb th\u1ef1c t\u1ebf r\u1eb1ng t\u00ednh ch\u1ea5t an to\u00e0n quan tr\u1ecdng c\u1ee7a thi\u1ebft b\u1ecb n\u00e0y khi\u1ebfn b\u1ea5t k\u1ef3 thay \u0111\u1ed5i n\u00e0o b\u00ean trong \u0111\u1ec1u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c t\u00ednh n\u0103ng an to\u00e0n c\u1ee7a n\u00f3.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3574\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/Circuit-Breaker-Types-Prohibited-from-Reconditioning.webp\" alt=\"C\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ecb c\u1ea5m t\u00e1i ch\u1ebf\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>Thi\u1ebft b\u1ecb b\u1ecb c\u1ea5m<\/th>\n<th>Tham chi\u1ebfu NEC<\/th>\n<th>L\u00fd do<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac (MCCBs)<\/strong><\/td>\n<td>88(A)(1)<\/td>\n<td>Ni\u00eam phong t\u1ea1i nh\u00e0 m\u00e1y; ph\u00e1 v\u1ee1 ni\u00eam phong s\u1ebd l\u00e0m m\u1ea5t hi\u1ec7u l\u1ef1c danh s\u00e1ch UL v\u00e0 hi\u1ec7u chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td><strong>Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 GFCI<\/strong><\/td>\n<td>210.15(1)<\/td>\n<td>B\u1ea3o v\u1ec7 nh\u00e2n s\u1ef1 quan tr\u1ecdng v\u1ec1 an to\u00e0n; hi\u1ec7u chu\u1ea9n kh\u00f4ng th\u1ec3 x\u00e1c minh sau khi t\u00e1i ch\u1ebf<\/td>\n<\/tr>\n<tr>\n<td><strong>Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 AFCI<\/strong><\/td>\n<td>210.15(2)<\/td>\n<td>\u0110i\u1ec7n t\u1eed ph\u1ee9c t\u1ea1p ph\u00e1t hi\u1ec7n d\u1ea5u hi\u1ec7u h\u1ed3 quang; t\u00e1i ch\u1ebf c\u00f3 th\u1ec3 b\u1ecf s\u00f3t s\u1ef1 suy gi\u1ea3m tinh vi<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb ch\u1ed1ng s\u1ef1 c\u1ed1 n\u1ed1i \u0111\u1ea5t (GFPE)<\/strong><\/td>\n<td>210.15(3)<\/td>\n<td>Ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb ph\u1ea3i gi\u1eef nguy\u00ean hi\u1ec7u chu\u1ea9n t\u1eeb nh\u00e0 m\u00e1y<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u01a1n v\u1ecb ng\u1eaft \u0111i\u1ec7n t\u1eed cho b\u1ed9 ng\u1eaft \u0111i\u1ec7n \u00e1p th\u1ea5p<\/strong><\/td>\n<td>88(B)<\/td>\n<td>\u0110i\u1ec7n t\u1eed kh\u00f4ng th\u1ec3 t\u00e1i ch\u1ebf \u0111\u00e1ng tin c\u1eady; ph\u1ea3i thay th\u1ebf b\u1eb1ng thi\u1ebft b\u1ecb m\u1edbi<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/strong><\/td>\n<td>8(A)<\/td>\n<td>T\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac v\u00e0 k\u1ebft n\u1ed1i bus kh\u00f4ng th\u1ec3 x\u00e1c minh sau khi t\u00e1i ch\u1ebf<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00f4ng t\u1eafc chuy\u1ec3n m\u1ea1ch (h\u1ec7 th\u1ed1ng kh\u1ea9n c\u1ea5p)<\/strong><\/td>\n<td>5(C), 701.5(C), 702.5(A)<\/td>\n<td>\u1ee8ng d\u1ee5ng an to\u00e0n t\u00ednh m\u1ea1ng y\u00eau c\u1ea7u thi\u1ebft b\u1ecb m\u1edbi<\/td>\n<\/tr>\n<tr>\n<td><strong>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n b\u01a1m ch\u1eefa ch\u00e1y<\/strong><\/td>\n<td>695.10<\/td>\n<td>Thi\u1ebft b\u1ecb an to\u00e0n t\u00ednh m\u1ea1ng quan tr\u1ecdng<\/td>\n<\/tr>\n<tr>\n<td><strong>\u1ed4 c\u1eafm v\u00e0 ph\u00edch c\u1eafm g\u1eafn k\u00e8m<\/strong><\/td>\n<td>3(A), 406.7<\/td>\n<td>M\u00f2n v\u00e0 suy gi\u1ea3m ti\u1ebfp x\u00fac kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n \u0111\u00e1ng tin c\u1eady<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Nh\u1ea5n m\u1ea1nh v\u1ec1 MCCB: M\u1eb7c d\u00f9 tr\u01b0\u1edbc \u0111\u00e2y m\u1ed9t s\u1ed1 ki\u1ec3m tra v\u00e0 th\u1ef1c h\u00e0nh b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba \u0111\u01b0\u1ee3c ph\u00e9p theo ti\u00eau chu\u1ea9n NEMA AB 4, c\u1ea7n l\u01b0u \u00fd r\u1eb1ng vi\u1ec7c t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac \u0111\u00e3 b\u1ecb c\u1ea5m trong phi\u00ean b\u1ea3n NEC m\u1edbi nh\u1ea5t n\u0103m 2020. B\u1ea3o tr\u00ec (v\u1ec7 sinh, v\u1eadn h\u00e0nh th\u1eed, ki\u1ec3m tra l\u1ef1c si\u1ebft) v\u1eabn h\u1ee3p l\u1ec7 nh\u01b0ng kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p th\u00e1o r\u1eddi c\u1ea5u tr\u00fac b\u00ean trong v\u00e0 t\u00e1i c\u1ea5u tr\u00fac b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac.<\/p>\n<h2>C\u00e1c th\u01b0\u01a1ng hi\u1ec7u h\u1ed7 tr\u1ee3 t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch<\/h2>\n<p>C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t n\u1ed5i ti\u1ebfng kh\u00e1c nhau qu\u1ea3n l\u00fd c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh t\u00e1i ch\u1ebf \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n b\u1edfi nh\u00e0 m\u00e1y c\u1ee7a h\u1ecd. H\u1ecd kh\u00f4ng s\u1eed d\u1ee5ng c\u00e1c \u0111\u01a1n v\u1ecb t\u00e2n trang l\u00e0m vi\u1ec7c thay m\u1eb7t cho c\u00e1c c\u00f4ng ty kh\u00e1c.<\/p>\n<table>\n<thead>\n<tr>\n<th>Th\u01b0\u01a1ng Hi\u1ec7u<\/th>\n<th>T\u00ean ch\u01b0\u01a1ng tr\u00ecnh<\/th>\n<th>Ph\u1ea1m vi<\/th>\n<th>B\u1ea3o H\u00e0nh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Eaton<\/strong><\/td>\n<td>T\u00e1i ch\u1ebf lo\u1ea1i 1 (Trung t\u00e2m t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft \u0111i\u1ec7n)<\/td>\n<td>B\u1ed9 ng\u1eaft \u0111i\u1ec7n LV\/MV c\u1ee7a Eaton v\u00e0 kh\u00f4ng ph\u1ea3i Eaton; t\u00e1i s\u1ea3n xu\u1ea5t Magnum DS; n\u00e2ng c\u1ea5p VCP-W FAME<\/td>\n<td>3 n\u0103m (1 n\u0103m cho \u1ee9ng d\u1ee5ng kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1)<\/td>\n<\/tr>\n<tr>\n<td><strong>ABB<\/strong><\/td>\n<td>T\u00e2n trang b\u1ed9 ng\u1eaft t\u1ea1i trung t\u00e2m d\u1ecbch v\u1ee5<\/td>\n<td>B\u1ed9 ng\u1eaft ABB v\u00e0 kh\u00f4ng ph\u1ea3i ABB; h\u1ea1t nh\u00e2n v\u00e0 phi h\u1ea1t nh\u00e2n; LV v\u00e0 MV<\/td>\n<td>1 n\u0103m ph\u1ee5 t\u00f9ng v\u00e0 lao \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td><strong>Schneider Electric \/ Square D<\/strong><\/td>\n<td>Gi\u1ea3i ph\u00e1p hi\u1ec7n \u0111\u1ea1i h\u00f3a \/ T\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch<\/td>\n<td>Square D v\u00e0 h\u1ea7u h\u1ebft c\u00e1c th\u01b0\u01a1ng hi\u1ec7u OEM l\u1edbn; b\u1ed9 ng\u1eaft LV v\u00e0 MV; hi\u1ec7n \u0111\u1ea1i h\u00f3a thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft<\/td>\n<td>Thay \u0111\u1ed5i theo ph\u1ea1m vi<\/td>\n<\/tr>\n<tr>\n<td><strong>Siemens<\/strong><\/td>\n<td>Ch\u01b0\u01a1ng tr\u00ecnh d\u1ecbch v\u1ee5 &amp; t\u00e1i ch\u1ebf<\/td>\n<td>Siemens v\u00e0 c\u00e1c th\u01b0\u01a1ng hi\u1ec7u c\u0169 (ITE, Gould); b\u1ed9 ng\u1eaft \u0111i\u1ec7n LV v\u00e0 MV<\/td>\n<td>Thay \u0111\u1ed5i theo ch\u01b0\u01a1ng tr\u00ecnh<\/td>\n<\/tr>\n<tr>\n<td><strong>GE \/ Vertiv<\/strong><\/td>\n<td>D\u1ecbch v\u1ee5 t\u00e1i ch\u1ebf<\/td>\n<td>B\u1ed9 ng\u1eaft GE v\u00e0 c\u00e1c th\u01b0\u01a1ng hi\u1ec7u c\u0169; b\u1ed9 ng\u1eaft MV v\u00e0 HV<\/td>\n<td>Thay \u0111\u1ed5i theo ch\u01b0\u01a1ng tr\u00ecnh<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>M\u1ed7i th\u01b0\u01a1ng hi\u1ec7u cung c\u1ea5p g\u00ec<\/h3>\n<p>T\u1ea1i khu v\u1ef1c B\u1eafc M\u1ef9, Eaton \u0111\u00e3 th\u00e0nh l\u1eadp n\u0103m Trung t\u00e2m t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft \u0111i\u1ec7n. Giao th\u1ee9c lo\u1ea1i 1 c\u1ee7a h\u1ecd bao g\u1ed3m th\u00e1o r\u1eddi ho\u00e0n to\u00e0n c\u00e1c b\u1ed9 ph\u1eadn, v\u1ec7 sinh theo ti\u00eau chu\u1ea9n linh ki\u1ec7n, l\u00e0m m\u1edbi b\u1ec1 m\u1eb7t, v\u00e0 cu\u1ed1i c\u00f9ng l\u00e0 ki\u1ec3m tra hi\u1ec7u su\u1ea5t cu\u1ed1i c\u00f9ng. H\u1ecd c\u0169ng ph\u00e1t tri\u1ec3n kh\u00e1i ni\u1ec7m n\u00e2ng c\u1ea5p FAME cho m\u1ed9t s\u1ed1 b\u1ed9 ng\u1eaft \u0111i\u1ec7n \u00e1p trung b\u00ecnh c\u1ee5 th\u1ec3 c\u0169ng nh\u01b0 c\u1ea3i ti\u1ebfn b\u1ed9 ng\u1eaft m\u1ea1ch v\u1edbi \u0111\u01a1n v\u1ecb ng\u1eaft Digitrip RMS v\u00e0 H\u1ec7 th\u1ed1ng B\u1ea3o tr\u00ec Gi\u1ea3m H\u1ed3 quang. M\u1ed7i b\u1ed9 ng\u1eaft \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf \u0111\u1ec1u \u0111\u01b0\u1ee3c th\u00eam v\u00e0o c\u01a1 s\u1edf d\u1eef li\u1ec7u trung t\u00e2m Pow-R-DB.<\/p>\n<p>T\u1ea1i c\u00e1c trung t\u00e2m d\u1ecbch v\u1ee5 c\u1ee7a h\u1ecd, ABB cung c\u1ea5p d\u1ecbch v\u1ee5 ki\u1ec3m tra l\u1ea1i cho c\u1ea3 c\u00e1c m\u1eabu c\u1ea7u dao c\u1ee7a ch\u00ednh h\u1ecd v\u00e0 c\u1ee7a c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t kh\u00e1c. D\u1ecbch v\u1ee5 c\u1ee7a h\u1ecd bao g\u1ed3m ti\u1ebfp nh\u1eadn thi\u1ebft b\u1ecb, ki\u1ec3m tra v\u00e0 th\u1eed nghi\u1ec7m, c\u0169ng nh\u01b0 th\u00e1o r\u1eddi thi\u1ebft b\u1ecb. Ngo\u00e0i vi\u1ec7c l\u00e0m s\u1ea1ch t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn, ABB c\u0169ng s\u1ebd ki\u1ec3m tra c\u00e1c v\u1ebft n\u1ee9t, \u0111\u1ea3m b\u1ea3o thay th\u1ebf c\u00e1c b\u1ed9 ph\u1eadn \u0111\u00e3 b\u1ecb h\u01b0 h\u1ecfng, b\u00f4i tr\u01a1n t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m chuy\u1ec3n \u0111\u1ed9ng, sau \u0111\u00f3 l\u1eafp r\u00e1p l\u1ea1i.<\/p>\n<p>Trong ch\u01b0\u01a1ng tr\u00ecnh Gi\u1ea3i ph\u00e1p Hi\u1ec7n \u0111\u1ea1i h\u00f3a c\u1ee7a m\u00ecnh, Schneider Electric \u0111\u00e3 m\u1eddi d\u1ecbch v\u1ee5 t\u00e1i c\u1ea5u h\u00ecnh c\u00e1c c\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p v\u00e0 trung b\u00ecnh. Vi\u1ec7c t\u00e1i \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n qua c\u00e1c b\u01b0\u1edbc sau: qua t\u1ea5t c\u1ea3 c\u00e1c giai \u0111o\u1ea1n, bao g\u1ed3m thay th\u1ebf m\u1ed9t ph\u1ea7n c\u00e1c th\u00e0nh ph\u1ea7n, r\u1eeda v\u00e0 s\u01a1n c\u00e1c chi ti\u1ebft, v\u00e0 b\u00f4i tr\u01a1n.<\/p>\n<h2>Ti\u00eau chu\u1ea9n ch\u00ednh: NEC, NEMA AB 4, IEEE C37.59 &amp; UL 489<\/h2>\n<p>Nhi\u1ec1u ti\u00eau chu\u1ea9n \u0111i\u1ec1u ch\u1ec9nh <strong>vi\u1ec7c t\u00e1i \u0111i\u1ec1u ch\u1ec9nh c\u1ea7u dao<\/strong>. Hi\u1ec3u r\u00f5 ti\u00eau chu\u1ea9n n\u00e0o \u00e1p d\u1ee5ng cho t\u00ecnh hu\u1ed1ng c\u1ee7a b\u1ea1n l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 tu\u00e2n th\u1ee7 m\u00e3 quy \u0111\u1ecbnh:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ti\u00eau chu\u1ea9n<\/th>\n<th>Nh\u00e0 xu\u1ea5t b\u1ea3n<\/th>\n<th>Ph\u1ea1m vi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>\u0110i\u1ec1u 210.15 &amp; 240.88 c\u1ee7a NEC<\/strong><\/td>\n<td>NFPA<\/td>\n<td>\u0110\u1ecbnh ngh\u0129a nh\u1eefng g\u00ec c\u00f3 th\u1ec3 v\u00e0 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c t\u00e1i \u0111i\u1ec1u ki\u1ec7n; y\u00eau c\u1ea7u li\u1ec7t k\u00ea l\u00e0 \u201ct\u00e1i \u0111i\u1ec1u ki\u1ec7n\u201d<\/td>\n<\/tr>\n<tr>\n<td><strong>NEMA AB 4<\/strong><\/td>\n<td>NEMA<\/td>\n<td>H\u01b0\u1edbng d\u1eabn ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba cho b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac (kh\u00f4ng ph\u1ea3i t\u00e1i \u0111i\u1ec1u ki\u1ec7n)<\/td>\n<\/tr>\n<tr>\n<td><strong>IEEE C37.59<\/strong><\/td>\n<td>IEEE<\/td>\n<td>Ti\u00eau chu\u1ea9n cho vi\u1ec7c t\u00e1i \u0111i\u1ec1u ki\u1ec7n thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch \u0111i\u1ec7n; \u0111\u1ecbnh ngh\u0129a quy tr\u00ecnh t\u00e1i \u0111i\u1ec1u ki\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td><strong>UL 489<\/strong><\/td>\n<td>UL<\/td>\n<td>Ti\u00eau chu\u1ea9n cho b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac; li\u00ean quan nh\u01b0 m\u1ed9t chu\u1ea9n ki\u1ec3m tra<\/td>\n<\/tr>\n<tr>\n<td><strong>Ch\u00ednh s\u00e1ch NEMA v\u1ec1 Thi\u1ebft b\u1ecb T\u00e1i \u0111i\u1ec1u ki\u1ec7n<\/strong><\/td>\n<td>NEMA<\/td>\n<td>Quan \u0111i\u1ec3m ng\u00e0nh v\u1ec1 t\u00ednh ph\u00f9 h\u1ee3p v\u00e0 an to\u00e0n c\u1ee7a thi\u1ebft b\u1ecb t\u00e1i \u0111i\u1ec1u ki\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td><strong>Ti\u00eau chu\u1ea9n PEARL<\/strong><\/td>\n<td>PEARL<\/td>\n<td>Ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c ANSI c\u00f4ng nh\u1eadn cho vi\u1ec7c ki\u1ec3m tra, th\u1eed nghi\u1ec7m v\u00e0 t\u00e1i \u0111i\u1ec1u ki\u1ec7n thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu: d\u1ea5u hi\u1ec7u ban \u0111\u1ea7u ph\u1ea3i \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf v\u00e0 thi\u1ebft b\u1ecb ph\u1ea3i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh l\u00e0 t\u00e1i \u0111i\u1ec1u ki\u1ec7n khi \u0111\u01b0\u1ee3c t\u00e2n trang. UL cung c\u1ea5p quy tr\u00ecnh ch\u1ee9ng nh\u1eadn cho thi\u1ebft b\u1ecb t\u00e1i c\u1ea5u tr\u00fac. C\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c c\u1ea3i t\u1ea1o theo quy tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u b\u1eb1ng D\u1ea5u UL ch\u1ee9a t\u1eeb \u201cRebuilt,\u201d \u201cRemanufactured,\u201d \u201cRebuilt,\u201d ho\u1eb7c \u201cReconditioned.\u201d \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 ti\u00eau chu\u1ea9n b\u1ed9 ng\u1eaft m\u1ea1ch, xem b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/what-is-ul-489-breakers\/\">Y\u00eau c\u1ea7u b\u1ed9 ng\u1eaft UL 489<\/a>.<\/p>\n<h2>Quy tr\u00ecnh T\u00e1i \u0111i\u1ec1u ki\u1ec7n T\u1eebng b\u01b0\u1edbc<\/h2>\n<p>Theo Eaton Class 1 v\u00e0 IEEE C37.59, \u0111\u00e2y l\u00e0 quy tr\u00ecnh th\u1ef1c hi\u1ec7n khi b\u1ed9 ng\u1eaft m\u1ea1ch c\u1ea7n t\u00e1i \u0111i\u1ec1u ki\u1ec7n:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3575\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/The-Reconditioning-Process-Step-by-Step.webp\" alt=\"Quy tr\u00ecnh T\u00e1i \u0111i\u1ec1u ki\u1ec7n T\u1eebng b\u01b0\u1edbc\" width=\"1448\" height=\"1086\" \/><\/p>\n<h3>B\u01b0\u1edbc 1: Ki\u1ec3m tra &amp; Th\u1eed nghi\u1ec7m khi nh\u1eadn h\u00e0ng<\/h3>\n<p>B\u1ed9 ng\u1eaft \u0111\u01b0\u1ee3c nh\u1eadn, ki\u1ec3m tra b\u1eb1ng m\u1eaft v\u00e0 th\u1eed nghi\u1ec7m trong \u0111i\u1ec1u ki\u1ec7n \u201cnh\u1eadn h\u00e0ng\u201d \u0111\u1ec3 ghi l\u1ea1i hi\u1ec7u su\u1ea5t c\u01a1 b\u1ea3n. C\u00e1c ph\u00e9p \u0111o quan tr\u1ecdng bao g\u1ed3m \u0111i\u1ec7n tr\u1edf ti\u1ebfp x\u00fac (t\u00ednh b\u1eb1ng millivolt), \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n, l\u1ef1c v\u1eadn h\u00e0nh c\u01a1 h\u1ecdc v\u00e0 k\u00edch th\u01b0\u1edbc. Th\u00f4ng tin thu \u0111\u01b0\u1ee3c \u0111\u01b0\u1ee3c ghi l\u1ea1i.<\/p>\n<h3>B\u01b0\u1edbc 2: Th\u00e1o r\u1eddi ho\u00e0n to\u00e0n<\/h3>\n<p>Vi\u1ec7c th\u00e1o r\u1eddi b\u1ed9 ng\u1eaft ho\u00e0n t\u1ea5t v\u00e0 b\u1ed9 ng\u1eaft \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e1ch th\u00e0nh c\u00e1c th\u00e0nh ph\u1ea7n bao g\u1ed3m: h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh, \u1ed1ng h\u1ed3 quang, r\u00e0o c\u00e1ch \u0111i\u1ec7n, khung v\u00e0 c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c. \u0110\u00e2y l\u00e0 giai \u0111o\u1ea1n x\u00e1c \u0111\u1ecbnh c\u00e1c l\u1ed7i nh\u01b0 li\u00ean k\u1ebft truy\u1ec1n \u0111\u1ed9ng b\u1ecb l\u1ed7i, ti\u1ebfp \u0111i\u1ec3m l\u1ec7ch, c\u00e1ch \u0111i\u1ec7n h\u01b0 h\u1ecfng l\u00e0m cho to\u00e0n b\u1ed9 thi\u1ebft b\u1ecb d\u1ec5 b\u1ecb h\u1ecfng khi ph\u00e1t hi\u1ec7n s\u1ef1 c\u1ed1.<\/p>\n<h3>B\u01b0\u1edbc 3: V\u1ec7 sinh theo t\u1eebng b\u1ed9 ph\u1eadn<\/h3>\n<p>C\u00e1c lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau c\u1ea7n c\u00e1c quy tr\u00ecnh v\u1ec7 sinh kh\u00e1c nhau. C\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng d\u1eabn \u0111i\u1ec7n \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch k\u1ef9 l\u01b0\u1ee1ng sao cho kh\u00f4ng c\u00f2n v\u1eadt li\u1ec7u l\u1ea1 trong khi v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c \u0111\u1eb7c t\u00ednh \u0111i\u1ec7n m\u00f4i v\u00e0 c\u1ea5u tr\u00fac. C\u00e1c b\u1ed9 ph\u1eadn d\u1eabn \u0111i\u1ec7n \u0111\u01b0\u1ee3c l\u00e0m s\u1ea1ch m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng l\u1edbp m\u1ea1 ban \u0111\u1ea7u. B\u1ec1 m\u1eb7t ti\u1ebfp x\u00fac \u0111\u01b0\u1ee3c t\u00e1i t\u1ea1o \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh ch\u1ea5t luy\u1ec7n kim v\u00e0 \u00e1p l\u1ef1c ti\u1ebfp x\u00fac ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang.<\/p>\n<h3>B\u01b0\u1edbc 4: Ki\u1ec3m tra &amp; Thay th\u1ebf b\u1ed9 ph\u1eadn<\/h3>\n<p>T\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn ph\u1ea3i \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u1ebft n\u1ee9t, suy gi\u1ea3m, r\u1ec9 s\u00e9t v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c k\u00edch th\u01b0\u1edbc. C\u00e1c b\u1ed9 ph\u1eadn \u0111\u00e3 m\u00f2n \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng b\u1ed9 ph\u1eadn OEM m\u1edbi, trong khi c\u00e1c b\u1ed9 ph\u1eadn kh\u00f4ng c\u00f2n s\u1ea3n xu\u1ea5t s\u1ebd c\u1ea7n \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng c\u00e1c b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt ng\u01b0\u1ee3c ph\u1ea3i tu\u00e2n th\u1ee7 ti\u00eau chu\u1ea9n trong IEEE C37.59. C\u00e1c b\u1ed9 ph\u1eadn n\u00e0y c\u00f3 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra trong \u0111i\u1ec1u ki\u1ec7n ph\u00f2ng th\u00ed nghi\u1ec7m nghi\u00eam ng\u1eb7t nh\u01b0 th\u1eed nghi\u1ec7m c\u00f4ng su\u1ea5t cao. C\u00e1c b\u1ed9 ph\u1eadn thay th\u1ebf \u0111i\u1ec3n h\u00ecnh cho c\u00e1c b\u1ed9 ph\u1eadn m\u00f2n c\u00f3 th\u1ec3 l\u00e0 l\u00f2 xo, ti\u1ebfp \u0111i\u1ec3m, shunt v\u00e0 bushing.<\/p>\n<h3>B\u01b0\u1edbc 5: B\u00f4i tr\u01a1n l\u1ea1i<\/h3>\n<p>T\u1ea5t c\u1ea3 c\u00e1c ch\u1ea5t b\u00f4i tr\u01a1n c\u0169 \u0111\u00e3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf, v\u00e0 m\u00e1y m\u00f3c c\u00f9ng c\u00e1c \u0111i\u1ec3m k\u1ebft n\u1ed1i \u0111\u01b0\u1ee3c b\u00f4i tr\u01a1n l\u1ea1i b\u1eb1ng m\u1ee1 \u0111\u01b0\u1ee3c nh\u00e0 s\u1ea3n xu\u1ea5t ch\u1ec9 \u0111\u1ecbnh. M\u1ed9t trong nh\u1eefng nguy\u00ean nh\u00e2n ch\u00ednh khi\u1ebfn c\u1ea7u dao ng\u1eaft m\u1ea1ch b\u1ecb h\u1ecfng l\u00e0 do b\u00f4i tr\u01a1n kh\u00f4ng ph\u00f9 h\u1ee3p \u2014 c\u01a1 ch\u1ebf c\u1ee9ng l\u00e0m ch\u1eadm qu\u00e1 tr\u00ecnh x\u1eed l\u00fd s\u1ef1 c\u1ed1, d\u1eabn \u0111\u1ebfn n\u0103ng l\u01b0\u1ee3ng s\u1ef1 c\u1ed1 h\u1ed3 quang cao h\u01a1n nhi\u1ec1u.<\/p>\n<h3>B\u01b0\u1edbc 6: L\u1eafp r\u00e1p l\u1ea1i theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a OEM<\/h3>\n<p>Trong qu\u00e1 tr\u00ecnh l\u1eafp r\u00e1p l\u1ea1i c\u1ea7u dao, t\u00e0i li\u1ec7u c\u1ee7a OEM \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Tuy nhi\u00ean, n\u1ebfu th\u00f4ng tin OEM kh\u00f4ng c\u00f3 s\u1eb5n, v\u00ed d\u1ee5 nh\u01b0 nh\u00e0 s\u1ea3n xu\u1ea5t g\u1ed1c \u0111\u00e3 ng\u1eebng ho\u1ea1t \u0111\u1ed9ng, Eaton s\u1ebd s\u1eed d\u1ee5ng c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1eadp trung Pow-R-DB ch\u1ee9a h\u1ed3 s\u01a1 t\u1eeb c\u00e1c c\u1ea7u dao t\u01b0\u01a1ng t\u1ef1 \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh mang l\u1ea1i k\u1ebft qu\u1ea3 mong mu\u1ed1n.<\/p>\n<h3>B\u01b0\u1edbc 7: Ki\u1ec3m tra cu\u1ed1i c\u00f9ng<\/h3>\n<p>C\u1ea7u dao ng\u1eaft m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng l\u1ea1i s\u1ebd tr\u1ea3i qua ki\u1ec3m tra k\u1ebft lu\u1eadn theo h\u01b0\u1edbng d\u1eabn c\u1ee7a IEEE v\u00e0 NEMA bao g\u1ed3m:<\/p>\n<ul>\n<li>\u0110\u00e1nh gi\u00e1 \u0111i\u1ec7n tr\u1edf c\u00e1ch \u0111i\u1ec7n<\/li>\n<li>Ki\u1ec3m tra \u0111i\u1ec7n tr\u1edf ti\u1ebfp \u0111i\u1ec3m (s\u1ee5t \u00e1p millivolt)<\/li>\n<li>\u0110\u00e1nh gi\u00e1 ho\u1ea1t \u0111\u1ed9ng c\u01a1 h\u1ecdc (th\u1eddi gian m\u1edf-\u0111\u00f3ng)<\/li>\n<li>Ki\u1ec3m tra ng\u1eaft qu\u00e1 d\u00f2ng (ng\u1eaft l\u00e2u, ng\u1eaft ng\u1eafn, ng\u1eaft t\u1ee9c th\u1eddi)<\/li>\n<li>\u0110\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111i\u1ec7n m\u00f4i<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 8: T\u00e0i li\u1ec7u &amp; G\u1eafn nh\u00e3n<\/h3>\n<p>B\u00e1o c\u00e1o ki\u1ec3m tra \u0111\u01b0\u1ee3c l\u1eadp \u0111\u1ec3 thi\u1ebft l\u1eadp s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa k\u1ebft qu\u1ea3 ki\u1ec3m tra \u201cnh\u1eadn \u0111\u01b0\u1ee3c\u201d v\u00e0 \u201ccu\u1ed1i c\u00f9ng\u201d, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 b\u1edfi th\u00f4ng tin \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c b\u1ed9 ph\u1eadn \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa. C\u1ea7u dao \u0111\u01b0\u1ee3c cung c\u1ea5p nh\u00e3n truy xu\u1ea5t ngu\u1ed3n g\u1ed1c x\u00e1c nh\u1eadn l\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e1i \u0111i\u1ec1u ch\u1ec9nh, ghi r\u00f5 t\u00ean c\u0169ng nh\u01b0 ng\u00e0y c\u1ee7a c\u00f4ng ty t\u00e1i \u0111i\u1ec1u ch\u1ec9nh. C\u1ea7u dao ho\u1ea1t \u0111\u1ed9ng tr\u1edf l\u1ea1i.<\/p>\n<h2>Khi n\u00e0o n\u00ean ch\u1ecdn t\u00e1i \u0111i\u1ec1u ch\u1ec9nh so v\u1edbi thay th\u1ebf<\/h2>\n<p>Quy\u1ebft \u0111\u1ecbnh t\u00e1i \u0111i\u1ec1u ch\u1ec9nh hay thay th\u1ebf ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i c\u1ea7u dao, tu\u1ed5i, m\u1ee9c \u0111\u1ed9 quan tr\u1ecdng v\u00e0 chi ph\u00ed. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 ma tr\u1eadn quy\u1ebft \u0111\u1ecbnh th\u1ef1c t\u1ebf:<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3576\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/08\/When-to-Choose-Reconditioning-vs-Replacement.webp\" alt=\"Khi n\u00e0o n\u00ean ch\u1ecdn t\u00e1i \u0111i\u1ec1u ch\u1ec9nh so v\u1edbi thay th\u1ebf\" width=\"1448\" height=\"1086\" \/><\/p>\n<table>\n<thead>\n<tr>\n<th>K\u1ecbch b\u1ea3n<\/th>\n<th>Khuy\u1ebfn ngh\u1ecb<\/th>\n<th>L\u00fd do<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>C\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p\/trung b\u00ecnh trong t\u1ee7 \u0111i\u1ec7n, 15\u201330 n\u0103m tu\u1ed5i<\/td>\n<td><strong>T\u00e1i \u0111i\u1ec1u ch\u1ec9nh<\/strong><\/td>\n<td>Thi\u1ebft k\u1ebf cho b\u1ea3o tr\u00ec; c\u00f3 s\u1eb5n ph\u1ee5 t\u00f9ng OEM; 40\u201360% r\u1ebb h\u01a1n h\u00e0ng m\u1edbi<\/td>\n<\/tr>\n<tr>\n<td>C\u1ea7u dao \u0111i\u1ec7n c\u00f3 b\u1ed9 ng\u1eaft l\u1ed7i l\u1ed7i th\u1eddi<\/td>\n<td><strong>T\u00e1i \u0111i\u1ec1u ch\u1ec9nh + n\u00e2ng c\u1ea5p b\u1ed9 ng\u1eaft<\/strong><\/td>\n<td>B\u1ed9 ng\u1eaft tr\u1ea1ng th\u00e1i r\u1eafn m\u1edbi k\u00e9o d\u00e0i tu\u1ed5i th\u1ecd v\u00e0 th\u00eam t\u00ednh n\u0103ng gi\u1ea3m h\u1ed3 quang<\/td>\n<\/tr>\n<tr>\n<td>MCCB trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111ang b\u1ecb h\u1ecfng<\/td>\n<td><strong>Thay th\u1ebf<\/strong><\/td>\n<td>NEC c\u1ea5m t\u00e1i ch\u1ebf MCCB; thay th\u1ebf l\u00e0 l\u1ef1a ch\u1ecdn duy nh\u1ea5t tu\u00e2n th\u1ee7 m\u00e3<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 ng\u1eaft GFCI ho\u1eb7c AFCI<\/td>\n<td><strong>Thay th\u1ebf<\/strong><\/td>\n<td>NEC 210.15 c\u1ea5m r\u00f5 r\u00e0ng vi\u1ec7c t\u00e1i ch\u1ebf c\u00e1c thi\u1ebft b\u1ecb an to\u00e0n<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 ng\u1eaft ngu\u1ed3n b\u1ecb h\u01b0 h\u1ecfng n\u1eb7ng do h\u1ed3 quang<\/td>\n<td><strong>Thay th\u1ebf<\/strong><\/td>\n<td>H\u01b0 h\u1ecfng nghi\u00eam tr\u1ecdng c\u00f3 th\u1ec3 l\u00e0m suy y\u1ebfu t\u00ednh to\u00e0n v\u1eb9n c\u1ea5u tr\u00fac; chi ph\u00ed t\u00e1i ch\u1ebf c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 chi ph\u00ed thay th\u1ebf<\/td>\n<\/tr>\n<tr>\n<td>D\u00f2ng thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch c\u1ea7n hi\u1ec7n \u0111\u1ea1i h\u00f3a<\/td>\n<td><strong>T\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft + l\u1eafp \u0111\u1eb7t l\u1ea1i<\/strong><\/td>\n<td>K\u00e9o d\u00e0i tu\u1ed5i th\u1ecd thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch m\u00e0 kh\u00f4ng c\u1ea7n thay th\u1ebf to\u00e0n b\u1ed9; gi\u1ea3m thi\u1ec3u th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td>H\u1ec7 th\u1ed1ng kh\u1ea9n c\u1ea5p ho\u1eb7c m\u1ea1ch an to\u00e0n sinh m\u1ea1ng<\/td>\n<td><strong>Thay th\u1ebf b\u1eb1ng thi\u1ebft b\u1ecb m\u1edbi<\/strong><\/td>\n<td>Y\u00eau c\u1ea7u b\u1ea3o hi\u1ec3m v\u00e0 m\u00e3 c\u00f3 th\u1ec3 b\u1eaft bu\u1ed9c thi\u1ebft b\u1ecb m\u1edbi cho c\u00e1c m\u1ea1ch quan tr\u1ecdng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 ch\u1ea9n \u0111o\u00e1n xem b\u1ed9 ng\u1eaft c\u1ee7a b\u1ea1n c\u00f3 th\u1ef1c s\u1ef1 c\u1ea7n ch\u00fa \u00fd hay kh\u00f4ng, xem h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i t\u1ea1i <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/how-to-tell-if-a-breaker-is-bad\/\">c\u00e1ch nh\u1eadn bi\u1ebft m\u1ed9t c\u1ea7u dao b\u1ecb h\u1ecfng<\/a>. V\u00e0 n\u1ebfu thay th\u1ebf l\u00e0 l\u1ef1a ch\u1ecdn \u0111\u00fang, b\u00e0i vi\u1ebft c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/how-much-to-replace-a-circuit-breaker\/\">chi ph\u00ed thay th\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> bao g\u1ed3m gi\u00e1 c\u1ea3 theo lo\u1ea1i b\u1ed9 ng\u1eaft v\u00e0 \u0111\u1ecbnh m\u1ee9c ampe.<\/p>\n<h2>So s\u00e1nh chi ph\u00ed: T\u00e1i ch\u1ebf so v\u1edbi M\u1edbi<\/h2>\n<p>Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch, chi ph\u00ed th\u01b0\u1eddng dao \u0111\u1ed9ng t\u1eeb 40 \u0111\u1ebfn 60% t\u1ed5ng chi ph\u00ed mua thi\u1ebft b\u1ecb m\u1edbi. \u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t \u0111\u00fang v\u1edbi c\u00e1c m\u1eabu l\u1edbn h\u01a1n c\u00f3 th\u1ec3 gi\u00fap ti\u1ebft ki\u1ec7m nhi\u1ec1u ti\u1ec1n:<\/p>\n<table>\n<thead>\n<tr>\n<th>Lo\u1ea1i C\u1ea7u Dao<\/th>\n<th>Chi ph\u00ed m\u1edbi (\u01af\u1edbc t\u00ednh)<\/th>\n<th>Chi ph\u00ed t\u00e1i ch\u1ebf (\u01af\u1edbc t\u00ednh)<\/th>\n<th>Ti\u1ebft ki\u1ec7m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>B\u1ed9 ng\u1eaft ngu\u1ed3n LV, khung 800A<\/td>\n<td>8,000\u201315,000<\/td>\n<td>3,200\u20139,000<\/td>\n<td>40\u201360%<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 ng\u1eaft ngu\u1ed3n LV, khung 3200A<\/td>\n<td>20,000\u201340,000<\/td>\n<td>8,000\u201324,000<\/td>\n<td>40\u201360%<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng MV, 5kV<\/td>\n<td>15,000\u201330,000<\/td>\n<td>6,000\u201318,000<\/td>\n<td>40\u201360%<\/td>\n<\/tr>\n<tr>\n<td>B\u1ed9 ng\u1eaft ch\u00e2n kh\u00f4ng MV, 15kV<\/td>\n<td>25,000\u201350,000<\/td>\n<td>10,000\u201330,000<\/td>\n<td>40\u201360%<\/td>\n<\/tr>\n<tr>\n<td>N\u00e2ng c\u1ea5p b\u1ed9 ph\u1eadn trip (Digitrip\/AC-PRO)<\/td>\n<td>3,000\u20138,000<\/td>\n<td>Bao g\u1ed3m trong t\u00e1i ch\u1ebf<\/td>\n<td>Ti\u1ebft ki\u1ec7m g\u00f3i<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Chi ph\u00ed b\u1ed5 sung: Qu\u00e1 tr\u00ecnh t\u00e1i ch\u1ebf ti\u1ebft ki\u1ec7m chi ph\u00ed li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eeda \u0111\u1ed5i thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch c\u1ea7n thi\u1ebft khi thay \u0111\u1ed5i k\u00edch th\u01b0\u1edbc b\u1ed9 ng\u1eaft m\u1edbi, gi\u1ea3m th\u1eddi gian ch\u1edd v\u00ec b\u1ed9 ng\u1eaft t\u00e1i ch\u1ebf c\u00f3 th\u1ec3 \u0111\u1ebfn trong 2-4 tu\u1ea7n so v\u1edbi b\u1ed9 ng\u1eaft m\u1edbi s\u1ebd \u0111\u01b0\u1ee3c giao trong 12-20 tu\u1ea7n, v\u00e0 gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng do b\u1ed9 ng\u1eaft t\u00e1i ch\u1ebf c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t ngay l\u1eadp t\u1ee9c trong t\u1ee7 hi\u1ec7n t\u1ea1i.<\/p>\n<h2 id=\"safety\">C\u00e1c c\u00e2n nh\u1eafc v\u1ec1 an to\u00e0n &amp; y\u00eau c\u1ea7u t\u00e0i li\u1ec7u<\/h2>\n<p>Vi\u1ec7c t\u00e1i ch\u1ebf ch\u1ec9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi nh\u00e2n vi\u00ean \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn theo c\u00e1c ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c y\u00eau c\u1ea7u c\u1ea7n ki\u1ec3m tra tr\u01b0\u1edbc khi l\u1eafp \u0111\u1eb7t b\u1ed9 ng\u1eaft m\u1ea1ch t\u00e1i ch\u1ebf:<\/p>\n<ul>\n<li>D\u00e1n nh\u00e3n: B\u1ed9 ng\u1eaft m\u1ea1ch t\u00e1i ch\u1ebf \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u \u201cReconditioned\u201d k\u00e8m t\u00ean c\u00f4ng ty t\u00e1i ch\u1ebf v\u00e0 ng\u00e0y th\u00e1ng.<\/li>\n<li>Ki\u1ec3m tra: Nh\u1eadn b\u00e1o c\u00e1o \u0111\u1ea7y \u0111\u1ee7 ch\u1ee9ng minh k\u1ebft qu\u1ea3 ki\u1ec3m tra \u201cnh\u1eadn \u0111\u01b0\u1ee3c\u201d v\u00e0 \u201ccu\u1ed1i c\u00f9ng\u201d c\u00f9ng danh s\u00e1ch c\u00e1c b\u1ed9 ph\u1eadn \u0111\u00e3 thay th\u1ebf.<\/li>\n<li>Ch\u1ee9ng nh\u1eadn: Trong tr\u01b0\u1eddng h\u1ee3p y\u00eau c\u1ea7u ch\u1ee9ng nh\u1eadn UL, x\u00e1c minh b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u UL Mark v\u1edbi \u201cRebuilt\u201d ho\u1eb7c \u201cReconditioned.\u201d<\/li>\n<li>Ph\u00ea duy\u1ec7t b\u1edfi AHJ: C\u01a1 quan c\u00f3 th\u1ea9m quy\u1ec1n (ki\u1ec3m tra \u0111i\u1ec7n) c\u00f3 th\u1ec3 c\u1ea7n b\u1eb1ng ch\u1ee9ng v\u1ec1 vi\u1ec7c t\u00e1i ch\u1ebf b\u1edfi c\u00f4ng ty \u0111\u01b0\u1ee3c ch\u1ee9ng nh\u1eadn \u2013 h\u00e3y chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng.<\/li>\n<li>B\u1ea3o h\u00e0nh: X\u00e1c minh \u0111i\u1ec1u ki\u1ec7n v\u00e0 th\u1eddi h\u1ea1n b\u1ea3o h\u00e0nh (Eaton: 3 n\u0103m; ABB: 1 n\u0103m; c\u00e1c h\u00e3ng kh\u00e1c kh\u00e1c nhau).<\/li>\n<li>Truy xu\u1ea5t ngu\u1ed3n g\u1ed1c: C\u00f4ng ty t\u00e1i ch\u1ebf n\u00ean l\u01b0u gi\u1eef h\u1ed3 s\u01a1 li\u00ean quan \u0111\u1ebfn s\u1ed1 s\u00ea-ri b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ec3 tham kh\u1ea3o trong t\u01b0\u01a1ng lai.<\/li>\n<li>Kh\u00f4ng \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf trong m\u1ea1ch an to\u00e0n t\u00ednh m\u1ea1ng tr\u1eeb khi AHJ v\u00e0 \u0111\u1ea1i l\u00fd b\u1ea3o hi\u1ec3m c\u1ee7a b\u1ea1n \u0111\u00e3 ph\u00ea duy\u1ec7t vi\u1ec7c l\u1eafp \u0111\u1eb7t.<\/li>\n<\/ul>\n<p>Ngo\u00e0i ra, OSHA 29 CFR 1910.334(b)(2) quy \u0111\u1ecbnh r\u1eb1ng khi m\u1ea1ch \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1eaft \u0111i\u1ec7n b\u1eb1ng thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 th\u00ec kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p c\u1ea5p \u0111i\u1ec7n l\u1ea1i b\u1eb1ng tay cho \u0111\u1ebfn khi x\u00e1c \u0111\u1ecbnh r\u1eb1ng thi\u1ebft b\u1ecb v\u00e0 m\u1ea1ch c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5p \u0111i\u1ec7n an to\u00e0n.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>B\u1ed9 ng\u1eaft m\u1ea1ch t\u00e1i ch\u1ebf l\u00e0 g\u00ec?<\/h3>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n t\u00e1i ch\u1ebf \u0111\u1ec1 c\u1eadp \u0111\u1ebfn b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec7n \u0111\u00e3 tr\u1ea3i qua qu\u00e1 tr\u00ecnh ph\u1ee5c h\u1ed3i t\u1ea1i m\u1ed9t c\u01a1 s\u1edf \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n b\u1edfi nh\u00e0 m\u00e1y. Theo c\u00e1c y\u00eau c\u1ea7u \u0111\u01b0\u1ee3c \u0111\u1eb7t ra b\u1edfi IEEE C37.59, to\u00e0n b\u1ed9 ho\u1ea1t \u0111\u1ed9ng bao g\u1ed3m ki\u1ec3m tra \u0111\u1ea7u v\u00e0o, th\u00e1o r\u1eddi ho\u00e0n to\u00e0n, l\u00e0m s\u1ea1ch c\u00e1c th\u00e0nh ph\u1ea7n, thay th\u1ebf c\u00e1c b\u1ed9 ph\u1eadn, b\u00f4i l\u1ea1i ch\u1ea5t b\u00f4i tr\u01a1n, l\u1eafp r\u00e1p l\u1ea1i c\u00e1c th\u00e0nh ph\u1ea7n theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a OEM, v\u00e0 ki\u1ec3m tra cu\u1ed1i c\u00f9ng. Ngo\u00e0i ra, b\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i \u0111\u01b0\u1ee3c d\u00e1n nh\u00e3n l\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf v\u1edbi t\u00ean v\u00e0 ng\u00e0y c\u1ee7a c\u00f4ng ty t\u00e1i ch\u1ebf, v\u00e0 danh s\u00e1ch g\u1ed1c ph\u1ea3i \u0111\u01b0\u1ee3c g\u1ee1 b\u1ecf do y\u00eau c\u1ea7u c\u1ee7a NEC.<\/p>\n<h3>B\u1ed9 ng\u1eaft m\u1ea1ch lo\u1ea1i B, lo\u1ea1i C, v\u00e0 lo\u1ea1i D l\u00e0 g\u00ec?<\/h3>\n<p>Lo\u1ea1i B, C, v\u00e0 D l\u00e0 c\u00e1c ph\u00e2n lo\u1ea1i c\u1ee7a MCB li\u00ean quan \u0111\u1ebfn \u0111\u1eb7c t\u00ednh ng\u1eaft m\u1ea1ch v\u00e0 kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo NEC 240.88. B\u1ed9 ng\u1eaft m\u1ea1ch lo\u1ea1i B ng\u1eaft \u1edf m\u1ee9c ba \u0111\u1ebfn n\u0103m l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c; lo\u1ea1i n\u00e0y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c \u1ee9ng d\u1ee5ng d\u00e2n d\u1ee5ng cho c\u00e1c m\u1ea1ch c\u00f3 t\u1ea3i thu\u1ea7n tr\u1edf. Ti\u1ebfp theo, ch\u00fang ta c\u00f3 b\u1ed9 ng\u1eaft m\u1ea1ch lo\u1ea1i C, ng\u1eaft \u1edf m\u1ee9c n\u0103m \u0111\u1ebfn m\u01b0\u1eddi l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p, c\u0169ng nh\u01b0 c\u00e1c m\u1ea1ch c\u00f3 t\u1ea3i c\u1ea3m kh\u00e1ng, nh\u01b0 \u0111\u00e8n hu\u1ef3nh quang v\u00e0 \u0111\u1ed9ng c\u01a1 nh\u1ecf. Lo\u1ea1i th\u1ee9 ba l\u00e0 MCB lo\u1ea1i D, ng\u1eaft \u1edf m\u1ee9c m\u01b0\u1eddi \u0111\u1ebfn hai m\u01b0\u01a1i l\u1ea7n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c v\u00e0 x\u1eed l\u00fd d\u00f2ng kh\u1edfi \u0111\u1ed9ng trong m\u00e1y bi\u1ebfn \u00e1p, \u0111\u1ed9ng c\u01a1 l\u1edbn ho\u1eb7c m\u00e1y h\u00e0n. T\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft tr\u00ean \u0111\u1ec1u l\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch nh\u1ecf g\u1ecdn, v\u1ecf \u0111\u00fac, v\u00e0 kh\u00f4ng th\u1ec3 t\u00e1i ch\u1ebf theo NEC 240.88(A)(1).<\/p>\n<h3>B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac c\u00f3 \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf kh\u00f4ng?<\/h3>\n<p>D\u1ef1a tr\u00ean NEC M\u1ee5c 240.88(A)(1) n\u0103m 2020, kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac. MCCB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u01b0 c\u00e1c \u0111\u01a1n v\u1ecb k\u00edn n\u00ean vi\u1ec7c ph\u00e1 v\u1ee1 ni\u00eam phong \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c m\u1ea5t danh s\u00e1ch UL v\u00e0 b\u1ea3o h\u00e0nh c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t. M\u1eb7c d\u00f9 c\u00f3 h\u01b0\u1edbng d\u1eabn ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba MCCB trong ti\u00eau chu\u1ea9n NEMA AB 4, nh\u01b0ng \u0111i\u1ec1u n\u00e0y kh\u00f4ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi vi\u1ec7c t\u00e1i ch\u1ebf. B\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3 l\u00e0 h\u1ee3p l\u00fd nh\u01b0ng vi\u1ec7c th\u00e1o r\u1eddi ho\u1eb7c s\u1eeda \u0111\u1ed5i c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a MCCB kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn.<\/p>\n<h3>Lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0o kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf theo \u0111i\u1ec1u kho\u1ea3n 210?<\/h3>\n<p>NEC quy \u0111\u1ecbnh t\u1ea1i \u0110i\u1ec1u 210.15 r\u1eb1ng c\u00f3 ba lo\u1ea1i thi\u1ebft b\u1ecb kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p t\u00e1i ch\u1ebf. Bao g\u1ed3m (1) thi\u1ebft b\u1ecb cung c\u1ea5p b\u1ea3o v\u1ec7 ng\u1eaft m\u1ea1ch s\u1ef1 c\u1ed1 n\u1ed1i \u0111\u1ea5t (GFCI) cho nh\u00e2n vi\u00ean, (2) thi\u1ebft b\u1ecb cung c\u1ea5p b\u1ea3o v\u1ec7 ng\u1eaft m\u1ea1ch s\u1ef1 c\u1ed1 h\u1ed3 quang (AFCI), v\u00e0 (3) thi\u1ebft b\u1ecb cung c\u1ea5p b\u1ea3o v\u1ec7 s\u1ef1 c\u1ed1 n\u1ed1i \u0111\u1ea5t cho thi\u1ebft b\u1ecb (GFPE). L\u00fd do c\u1ee7a c\u00e1c l\u1ec7nh c\u1ea5m n\u00e0y l\u00e0 c\u00e1c thi\u1ebft b\u1ecb c\u1ea7n \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf c\u0169ng l\u00e0 c\u00e1c thi\u1ebft b\u1ecb an to\u00e0n quan tr\u1ecdng c\u00f3 y\u00eau c\u1ea7u hi\u1ec7u chu\u1ea9n v\u00e0 \u0111\u1ed9 nh\u1ea1y kh\u00f4ng th\u1ec3 \u0111\u1ea3m b\u1ea3o ngay c\u1ea3 sau khi \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf. Do \u0111\u00f3, n\u1ebfu b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb t\u00e1i ch\u1ebf n\u00e0o (GFCI, AFCI ho\u1eb7c GFPE) kh\u00f4ng ng\u1eaft m\u1ea1ch t\u1ea1i ng\u01b0\u1ee1ng y\u00eau c\u1ea7u, th\u00ec s\u1ebd t\u1ea1o ra nguy hi\u1ec3m \u0111\u1ebfn t\u00ednh m\u1ea1ng. Ngo\u00e0i ra, NEC quy \u0111\u1ecbnh r\u1eb1ng c\u1ea7u dao khu\u00f4n kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf theo M\u1ee5c 240.88(A)(1) c\u0169ng nh\u01b0 c\u00e1c b\u1ed9 ph\u1eadn ng\u1eaft \u0111i\u1ec7n t\u1eed c\u1ee7a c\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf theo M\u1ee5c 240.88(B).<\/p>\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\/nfpa-70-standard-development\/70\" target=\"_blank\" rel=\"nofollow noopener\">NFPA 70 \u2014 B\u1ed9 Quy chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC) 2020, \u0110i\u1ec1u 210.15 v\u00e0 240.88<\/a><\/li>\n<li><a href=\"https:\/\/www.nema.org\/standards\/view\/guidelines-for-inspection-and-preventive-maintenance-of-molded-case-circuit-breakers-used-in-commercial-and-industrial\" target=\"_blank\" rel=\"nofollow noopener\">ANSI\/NEMA AB 4-2023 \u2014 H\u01b0\u1edbng d\u1eabn Ki\u1ec3m tra v\u00e0 B\u1ea3o tr\u00ec Ph\u00f2ng ng\u1eeba C\u1ea7u dao Khu\u00f4n<\/a><\/li>\n<li><a href=\"https:\/\/standards.ieee.org\/ieee\/C37.59\/10366\/\" target=\"_blank\" rel=\"nofollow noopener\">IEEE C37.59-2018 \u2014 Ti\u00eau chu\u1ea9n T\u00e1i ch\u1ebf Thi\u1ebft b\u1ecb C\u00f4ng t\u1eafc \u0110i\u1ec7n<\/a><\/li>\n<li><a href=\"https:\/\/www.shopul.com\/product\/ul-489\" target=\"_blank\" rel=\"nofollow noopener\">UL 489 \u2014 Ti\u00eau chu\u1ea9n cho C\u1ea7u dao Khu\u00f4n, C\u00f4ng t\u1eafc Khu\u00f4n v\u00e0 V\u1ecf C\u1ea7u dao<\/a><\/li>\n<li><a href=\"https:\/\/www.ul.com\/news\/reconditioned-electrical-equipment-2020-nec-guide\" target=\"_blank\" rel=\"nofollow noopener\">UL \u2014 Thi\u1ebft b\u1ecb \u0110i\u1ec7n T\u00e1i ch\u1ebf: H\u01b0\u1edbng d\u1eabn NEC 2020<\/a><\/li>\n<li><a href=\"https:\/\/www.eaton.com\/us\/en-us\/catalog\/services\/electrical-distribution-services\/class-1-reconditioning.html\" target=\"_blank\" rel=\"nofollow noopener\">Eaton \u2014 T\u00e1i ch\u1ebf C\u1ea7u dao L\u1edbp 1 cho C\u1ea7u dao \u0110i\u1ec7n \u00e1p Th\u1ea5p v\u00e0 Trung b\u00ecnh<\/a><\/li>\n<li><a href=\"https:\/\/new.abb.com\/service\/service-centers\/breaker-refurbishment-services\" target=\"_blank\" rel=\"nofollow noopener\">ABB \u2014 D\u1ecbch v\u1ee5 T\u00e2n trang Trung t\u00e2m C\u1ea7u dao<\/a><\/li>\n<li><a href=\"https:\/\/www.se.com\/us\/en\/work\/services\/field-services\/electrical-distribution\/\" target=\"_blank\" rel=\"nofollow noopener\">Schneider Electric \u2014 Gi\u1ea3i ph\u00e1p Hi\u1ec7n \u0111\u1ea1i h\u00f3a v\u00e0 N\u00e2ng c\u1ea5p Ph\u00e2n ph\u1ed1i \u0110i\u1ec7n<\/a><\/li>\n<li><a href=\"https:\/\/www.pearl1.org\/\" target=\"_blank\" rel=\"nofollow noopener\">PEARL \u2014 Li\u00ean \u0111o\u00e0n T\u00e1i ch\u1ebf Thi\u1ebft b\u1ecb \u0110i\u1ec7n chuy\u00ean nghi\u1ec7p<\/a><\/li>\n<\/ul>\n<p>C\u1ea7u dao c\u00f3 th\u1ec3 t\u00e1i ch\u1ebf bao g\u1ed3m c\u1ea7u dao \u0111i\u1ec7n \u00e1p th\u1ea5p, trung b\u00ecnh v\u00e0 cao lo\u1ea1i r\u00fat ra, c\u00f3 th\u1ec3 b\u1ea3o tr\u00ec t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong tr\u1ea1m bi\u1ebfn \u00e1p v\u00e0 thi\u1ebft b\u1ecb chuy\u1ec3n m\u1ea1ch. Thi\u1ebft k\u1ebf c\u1ee7a c\u1ea7u dao s\u1eed d\u1ee5ng ti\u1ebfp \u0111i\u1ec3m c\u00f3 th\u1ec3 thay th\u1ebf, c\u01a1 ch\u1ebf d\u1ec5 ti\u1ebfp c\u1eadn v\u00e0 b\u1ed9 ph\u1eadn ng\u1eaft c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau cho ph\u00e9p t\u00e1i ch\u1ebf th\u1ef1c t\u1ebf ph\u00f9 h\u1ee3p v\u1edbi NEC 240.88. C\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t l\u1edbn nh\u01b0 Eaton, ABB v\u00e0 Schneider Electric cung c\u1ea5p d\u1ecbch v\u1ee5 t\u00e1i ch\u1ebf theo ti\u00eau chu\u1ea9n IEEE C37.59 \u0111\u1ea3m b\u1ea3o b\u1ea3o h\u00e0nh t\u01b0\u01a1ng \u0111\u01b0\u01a1ng v\u1edbi thi\u1ebft b\u1ecb m\u1edbi.<\/p>\n<p>M\u1eb7t kh\u00e1c, c\u1ea7u dao khu\u00f4n, thi\u1ebft b\u1ecb GFCI, thi\u1ebft b\u1ecb AFCI v\u00e0 thi\u1ebft b\u1ecb GFPE b\u1ecb c\u1ea5m tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng \u0111\u01b0\u1ee3c t\u00e1i ch\u1ebf theo NEC 210.15 v\u00e0 240.88 v\u00e0 ph\u1ea3i \u0111\u01b0\u1ee3c thay th\u1ebf n\u1ebfu h\u1ecfng. NEC 2020 \u0111\u00e3 l\u00e0m r\u00f5 r\u1eb1ng c\u1ea7u dao \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 b\u1ea3o tr\u00ec c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec trong khi c\u1ea7u dao an to\u00e0n \u0111\u01b0\u1ee3c ni\u00eam phong th\u00ec kh\u00f4ng th\u1ec3. Khi l\u1ef1a ch\u1ecdn t\u00e1i ch\u1ebf ho\u1eb7c thay th\u1ebf, tr\u01b0\u1edbc ti\u00ean h\u00e3y x\u00e1c \u0111\u1ecbnh lo\u1ea1i c\u1ea7u dao v\u00e0 so s\u00e1nh chi ph\u00ed th\u1ea5t b\u1ea1i \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c vi\u1ec7c n\u00e0o \u0111\u00e1ng l\u00e0m h\u01a1n \u2014 t\u00e1i ch\u1ebf hay thay th\u1ebf c\u1ea7u dao.<\/p>","protected":false},"excerpt":{"rendered":"<p>In case your facility uses outdated switchgears, you may wonder whether you can refurbish your circuit breakers or should obtain brand new gadgets. The answer is not that simple, as it depends on a type of circuit breaker in your facility. As stated by the National Electrical Code (NEC) of 2020, low-voltage power circuit breakers, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3572,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-3571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3571","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/comments?post=3571"}],"version-history":[{"count":3,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3571\/revisions"}],"predecessor-version":[{"id":3579,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/3571\/revisions\/3579"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media\/3572"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media?parent=3571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/categories?post=3571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/tags?post=3571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}