{"id":4558,"date":"2026-10-14T17:13:59","date_gmt":"2026-10-14T17:13:59","guid":{"rendered":"https:\/\/huyuglobal.com\/?p=4558"},"modified":"2026-10-14T17:14:00","modified_gmt":"2026-10-14T17:14:00","slug":"elcb-used-for-the-protection-of-what","status":"publish","type":"post","link":"https:\/\/huyuglobal.com\/vi\/blog\/elcb-used-for-the-protection-of-what\/","title":{"rendered":"ELCB \u0110\u01b0\u1ee3c S\u1eed D\u1ee5ng \u0110\u1ec3 B\u1ea3o V\u1ec7 C\u00e1i G\u00ec?"},"content":{"rendered":"<p>M\u1ed9t ELCB b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi kh\u1ecfi \u0111i\u1ec7n gi\u1eadt do r\u00f2 r\u1ec9 \u0111\u1ea5t, t\u1ee9c l\u00e0 d\u00f2ng \u0111i\u1ec7n s\u1ed1ng r\u00f2 r\u1ec9 qua v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n b\u1ecb h\u1ecfng, n\u01b0\u1edbc ho\u1eb7c th\u1eadm ch\u00ed c\u01a1 th\u1ec3 ng\u01b0\u1eddi. Tuy nhi\u00ean, t\u00ean g\u1ecdi n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn hai thi\u1ebft b\u1ecb ho\u00e0n to\u00e0n kh\u00e1c nhau, v\u00e0 ch\u1ec9 m\u1ed9t trong s\u1ed1 \u0111\u00f3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t hi\u1ec7n nay. Lo\u1ea1i v\u1eadn h\u00e0nh b\u1eb1ng \u0111i\u1ec7n \u00e1p b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ee9c \u0111i\u1ec7n \u00e1p t\u0103ng tr\u00ean v\u1ecf kim lo\u1ea1i, trong khi lo\u1ea1i v\u1eadn h\u00e0nh b\u1eb1ng d\u00f2ng \u0111i\u1ec7n l\u00e0 thi\u1ebft b\u1ecb hi\u1ec7n nay \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 RCCB ho\u1eb7c RCD, v\u00e0 thi\u1ebft b\u1ecb n\u00e0y cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt cho ng\u01b0\u1eddi \u0111\u1ee9ng tr\u00ean m\u1eb7t \u0111\u1ea5t.<\/p>\n<blockquote><p>Ph\u1ea3n h\u1ed3i ng\u1eafn: ELCB c\u00f3 ngh\u0129a l\u00e0 c\u1ea7u dao r\u00f2 r\u1ec9 \u0111\u1ea5t, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 an to\u00e0n cho ng\u01b0\u1eddi v\u00e0 thi\u1ebft b\u1ecb kh\u1ecfi t\u00e1c \u0111\u1ed9ng c\u1ee7a d\u00f2ng r\u00f2 r\u1ec9 \u0111\u1ea5t. C\u00f3 hai lo\u1ea1i ch\u00ednh. ELCB v\u1eadn h\u00e0nh b\u1eb1ng \u0111i\u1ec7n \u00e1p (VO-ELCB) s\u1ebd ng\u1eaft khi c\u00f3 s\u1ef1 t\u0103ng \u0111i\u1ec7n th\u1ebf gi\u1eefa c\u00e1c b\u1ed9 ph\u1eadn kim lo\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 \u0111i\u1ec7n c\u1ef1c c\u1ea3m bi\u1ebfn \u0111\u1ea5t ri\u00eang bi\u1ec7t khi \u0111i\u1ec7n \u00e1p \u0111\u1ea1t m\u1ed9t gi\u00e1 tr\u1ecb kho\u1ea3ng 50 V, m\u1ea5t kho\u1ea3ng 200-500 mili gi\u00e2y. Phi\u00ean b\u1ea3n n\u00e0y hi\u1ec7n kh\u00f4ng c\u00f2n s\u1eed d\u1ee5ng. Lo\u1ea1i th\u1ee9 hai l\u00e0 ELCB v\u1eadn h\u00e0nh b\u1eb1ng d\u00f2ng \u0111i\u1ec7n hi\u1ec7n \u0111\u1ea1i, ch\u00ednh l\u00e0 RCCB hi\u1ec7n \u0111\u1ea1i theo ti\u00eau chu\u1ea9n IEC 61008. \u0110\u1ed9 nh\u1ea1y c\u00f3 th\u1ec3 ch\u1ecdn t\u1eeb 10 mA \u0111\u1ebfn 300 mA v\u00e0 th\u1eddi gian ng\u1eaft t\u1eeb 25 \u0111\u1ebfn 40 ms. N\u1ebfu b\u1ea5t k\u1ef3 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt n\u00e0o v\u1eabn ghi ELCB ng\u00e0y nay, th\u1ef1c ch\u1ea5t \u0111\u00f3 l\u00e0 RCCB v\u00e0 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng mA.<\/p><\/blockquote>\n<h2>Hai Thi\u1ebft B\u1ecb, M\u1ed9t T\u00ean G\u1ecdi<\/h2>\n<p>Thu\u1eadt ng\u1eef n\u00e0y kh\u00e1 g\u00e2y hi\u1ec3u nh\u1ea7m, d\u1eabn \u0111\u1ebfn nguy hi\u1ec3m th\u1ef1c s\u1ef1 khi c\u1ea3 hai s\u1ea3n ph\u1ea9m c\u00f9ng c\u00f3 t\u00ean g\u1ecdi trong ng\u00e0nh. C\u00e1ch ti\u1ebfp c\u1eadn \u0111\u00fang l\u00e0 ph\u00e2n bi\u1ec7t d\u1ef1a tr\u00ean c\u00e1c ph\u00e9p \u0111o do m\u1ed7i thi\u1ebft b\u1ecb th\u1ef1c hi\u1ec7n.<\/p>\n<ul>\n<li>ELCB v\u1eadn h\u00e0nh b\u1eb1ng \u0111i\u1ec7n \u00e1p (VO-ELCB). N\u00f3 \u0111o \u0111i\u1ec7n th\u1ebf gi\u1eefa t\u1ea5t c\u1ea3 c\u00e1c c\u1ea5u tr\u00fac kim lo\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng \u2013 khung, \u1ed1ng d\u1eabn, h\u1ed9p \u2013 v\u00e0 \u0111i\u1ec7n c\u1ef1c \u0111\u1ea5t c\u00e1ch ly xa. Khi \u0111i\u1ec7n th\u1ebf t\u0103ng \u0111\u1ebfn kho\u1ea3ng 50 V, thi\u1ebft b\u1ecb s\u1ebd m\u1edf m\u1ea1ch ch\u00ednh.<\/li>\n<li>ELCB v\u1eadn h\u00e0nh b\u1eb1ng d\u00f2ng \u0111i\u1ec7n. N\u00f3 so s\u00e1nh d\u00f2ng \u0111i\u1ec7n \u0111i theo \u0111\u01b0\u1eddng d\u00e2y v\u1edbi d\u00f2ng \u0111i\u1ec7n tr\u1edf l\u1ea1i theo d\u00e2y trung t\u00ednh. B\u1ea5t k\u1ef3 s\u1ef1 sai l\u1ec7ch n\u00e0o cho th\u1ea5y d\u00f2ng \u0111i\u1ec7n \u0111i qua m\u1ed9t \u0111\u01b0\u1eddng kh\u00e1c. Do s\u1ef1 nh\u1ea7m l\u1eabn n\u00e0y, thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c IEC \u0111\u1ed5i t\u00ean th\u00e0nh thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 v\u00e0 ng\u00e0y nay \u0111\u01b0\u1ee3c mua d\u01b0\u1edbi c\u00e1c t\u00ean RCD, RCCB ho\u1eb7c RCBO.<\/li>\n<\/ul>\n<p>N\u00f3i c\u00e1ch kh\u00e1c, nguy\u00ean l\u00fd gi\u1ed1ng nhau trong c\u1ea3 hai tr\u01b0\u1eddng h\u1ee3p \u2013 m\u1ed9t r\u01a1 le kh\u00f3a \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, ngu\u1ed3n \u0111i\u1ec7n \u0111\u1ea7u v\u00e0o \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i qua ti\u1ebfp \u0111i\u1ec3m c\u00f4ng t\u1eafc, c\u00f3 ngh\u0129a l\u00e0 khi thi\u1ebft b\u1ecb ng\u1eaft, n\u00f3 s\u1ebd ng\u1eaft k\u1ebft n\u1ed1i h\u1ec7 th\u1ed1ng v\u00e0 kh\u00f4ng k\u1ebft n\u1ed1i l\u1ea1i cho \u0111\u1ebfn khi \u0111\u01b0\u1ee3c \u0111\u1eb7t l\u1ea1i.<\/p>\n<p>C\u1ea7n ch\u00ednh x\u00e1c v\u1ec1 \u00fd ngh\u0129a c\u1ee7a \u201cr\u00f2 r\u1ec9 \u0111\u1ea5t\u201d, v\u00ec \u0111\u00f3 l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng m\u00e0 c\u1ea3 hai thi\u1ebft b\u1ecb \u0111\u1ec1u nh\u1eb1m ph\u00e1t hi\u1ec7n: d\u00f2ng \u0111i\u1ec7n r\u1eddi kh\u1ecfi m\u1ea1ch d\u1ef1 \u0111\u1ecbnh v\u00e0 tr\u1edf v\u1ec1 \u0111\u1ea5t qua \u0111\u01b0\u1eddng kh\u00f4ng mong mu\u1ed1n. \u0110\u00f3 l\u00e0 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/what-is-a-ground-fault\/\">m\u1ed9t l\u1ed7i \u0111\u1ea5t v\u00e0 c\u00e1ch n\u00f3 kh\u00e1c v\u1edbi ng\u1eafn m\u1ea1ch<\/a>, v\u00e0 \u0111\u00f3 l\u00e0 nguy c\u01a1 c\u1ee5 th\u1ec3 m\u00e0 ELCB \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ng\u1eaft.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4560\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/10\/How-the-Voltage-Operated-Type-Worked.webp\" alt=\"C\u00e1ch Lo\u1ea1i V\u1eadn H\u00e0nh B\u1eb1ng \u0110i\u1ec7n \u00c1p Ho\u1ea1t \u0110\u1ed9ng\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>C\u00e1ch Lo\u1ea1i V\u1eadn H\u00e0nh B\u1eb1ng \u0110i\u1ec7n \u00c1p Ho\u1ea1t \u0110\u1ed9ng<\/h2>\n<p>C\u00f3 hai c\u1ef1c \u0111\u1ea5t v\u1edbi m\u1ed9t VO-ELCB v\u00e0 d\u00e2y d\u1eabn \u0111\u1ea5t \u0111\u01b0\u1ee3c \u0111\u1ecbnh tuy\u1ebfn c\u00f3 ch\u1ee7 \u00fd qua n\u00f3. M\u1ed9t c\u1ef1c \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi c\u00e1c d\u00e2y d\u1eabn b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb, v\u00e0 c\u1ef1c c\u00f2n l\u1ea1i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi \u0111i\u1ec7n c\u1ef1c \u0111\u1ea5t. Cu\u1ed9n c\u1ea3m bi\u1ebfn n\u1eb1m gi\u1eefa hai c\u1ef1c \u0111\u00f3.<\/p>\n<p>N\u1ebfu m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng, th\u00ec kh\u00f4ng c\u00f3 d\u00f2ng \u0111i\u1ec7n n\u00e0o ch\u1ea1y d\u1ecdc theo \u0111\u01b0\u1eddng d\u1eabn \u0111\u00f3 v\u00e0 \u0111i\u1ec7n \u00e1p (hi\u1ec7u \u0111i\u1ec7n th\u1ebf) v\u1eabn \u1edf m\u1ee9c r\u1ea5t th\u1ea5p. N\u1ebfu x\u1ea3y ra l\u1ed7i c\u00e1ch \u0111i\u1ec7n v\u00e0 v\u1ecf kim lo\u1ea1i b\u1ecb nhi\u1ec5m \u0111i\u1ec7n, d\u00f2ng l\u1ed7i b\u1eaft \u0111\u1ea7u ch\u1ea1y xu\u1ed1ng \u0111\u1ea5t qua \u0111i\u1ec7n c\u1ef1c \u0111\u1ea5t, \u0111i\u1ec7n \u00e1p t\u1ea1i ph\u1ea7n kim lo\u1ea1i t\u0103ng l\u00ean tr\u00ean tham chi\u1ebfu \u0111\u1ea5t t\u1eeb xa, v\u00e0 cu\u1ed9n c\u1ea3m bi\u1ebfn ph\u00e1t hi\u1ec7n s\u1ef1 t\u0103ng n\u00e0y g\u00e2y ra vi\u1ec7c ng\u1eaft thi\u1ebft b\u1ecb \u1edf \u0111i\u1ec7n \u00e1p kho\u1ea3ng 50 volt.<\/p>\n<p>H\u00e3y ch\u00fa \u00fd \u0111\u1ebfn ph\u1ea1m vi gi\u1edbi h\u1ea1n c\u1ee7a thi\u1ebft b\u1ecb. Thi\u1ebft b\u1ecb n\u00e0y ch\u1ec9 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft l\u1ed7i khi d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c d\u1eabn tr\u1edf l\u1ea1i qua \u0111i\u1ec7n c\u1ef1c \u0111\u00e3 k\u1ebft n\u1ed1i. Th\u1ef1c t\u1ebf, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a:<\/p>\n<ul>\n<li>B\u1ea5t k\u1ec3 l\u1ed7i x\u1ea3y ra \u1edf \u0111\u00e2u trong d\u00e2y d\u1eabn \u0111\u1ea5t, ELCB tr\u1edf n\u00ean v\u00f4 d\u1ee5ng, kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u n\u00e0o \u0111\u1ec3 ch\u1ec9 ra s\u1ef1 c\u1ed1 n\u00e0y.<\/li>\n<li>B\u1ea5t k\u1ef3 k\u1ebft n\u1ed1i n\u00e0o kh\u00e1c v\u1edbi \u0111\u1ea5t trong h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7, ch\u1eb3ng h\u1ea1n nh\u01b0 \u0111i\u1ec7n c\u1ef1c \u0111\u1ea5t th\u1ee9 hai, \u1ed1ng d\u1eabn k\u1ebft n\u1ed1i, v.v., c\u00f3 th\u1ec3 khi\u1ebfn d\u00f2ng \u0111i\u1ec7n \u0111i v\u00f2ng qua c\u1ea3m bi\u1ebfn v\u00e0 v\u01b0\u1ee3t qua thi\u1ebft b\u1ecb.<\/li>\n<li>N\u1ebfu m\u1ed9t ng\u01b0\u1eddi \u0111\u1ee9ng tr\u00ean m\u1eb7t \u0111\u1ea5t ti\u1ebfp x\u00fac v\u1edbi b\u1ea5t k\u1ef3 d\u00e2y d\u1eabn pha n\u00e0o, d\u00f2ng \u0111i\u1ec7n kh\u00f4ng \u0111i qua \u0111i\u1ec7n c\u1ef1c \u0111\u00e3 \u0111\u1ea5u d\u00e2y, do \u0111\u00f3 thi\u1ebft b\u1ecb s\u1ebd kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u01b0\u1ee3c. \u0110\u00e2y l\u00e0 h\u1ea1n ch\u1ebf \u0111\u00e3 khi\u1ebfn s\u1ea3n ph\u1ea9m b\u1ecb lo\u1ea1i kh\u1ecfi th\u1ecb tr\u01b0\u1eddng.<\/li>\n<\/ul>\n<p>C\u00f3 m\u1ed9t \u0111i\u1ec3m l\u00e0m cho thi\u1ebft k\u1ebf k\u00edch ho\u1ea1t b\u1eb1ng \u0111i\u1ec7n \u00e1p n\u00e0y t\u1ed1t h\u01a1n c\u00e1c lo\u1ea1i kh\u00e1c, v\u00e0 t\u00f4i ph\u1ea3i \u0111\u1ec1 c\u1eadp \u0111\u1ebfn n\u00f3 v\u00ec s\u1ef1 trung th\u1ef1c: n\u00f3 \u00edt b\u1ecb ng\u1eaft nh\u1ea7m h\u01a1n, v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng ph\u00e1t hi\u1ec7n l\u1ed7i \u0111\u1ea5t DC m\u00e0 thi\u1ebft b\u1ecb c\u1ea3m \u1ee9ng t\u1eeb kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y. Tuy nhi\u00ean, nh\u1eefng \u01b0u \u0111i\u1ec3m n\u00e0y kh\u00f4ng bi\u1ec7n minh cho vi\u1ec7c s\u1eed d\u1ee5ng m\u1ed9t thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng m\u00e0 kh\u00f4ng c\u00f3 d\u1ea5u hi\u1ec7u h\u1ecfng h\u00f3c nh\u1ecf nh\u1ea5t v\u00e0 kh\u00f4ng th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a n\u00f3.<\/p>\n<h2>T\u1ea1i sao ELCB b\u1ecb lo\u1ea1i b\u1ecf kh\u1ecfi s\u1eed d\u1ee5ng<\/h2>\n<p>Ba v\u1ea5n \u0111\u1ec1 \u0111\u00e1ng \u0111\u01b0\u1ee3c \u0111\u1ec1 c\u1eadp theo th\u1ee9 t\u1ef1 quan tr\u1ecdng.<\/p>\n<ul>\n<li>Ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1ea5t. Ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng an to\u00e0n ch\u00e1y d\u1ef1a tr\u00ean \u0111i\u1ec7n \u00e1p ph\u1ee5 thu\u1ed9c v\u00e0o vi\u1ec7c l\u1eafp \u0111\u1eb7t \u0111\u1ea5t \u0111\u00fang c\u00e1ch, ho\u1ea1t \u0111\u1ed9ng t\u1ed1t v\u00e0 s\u1ef1 hi\u1ec7n di\u1ec7n c\u1ee7a m\u1ed9t \u0111i\u1ec7n c\u1ef1c tham chi\u1ebfu \u0111\u1ed9c l\u1eadp. Trong c\u00e1c t\u00f2a nh\u00e0 c\u0169, d\u00e2y \u0111\u1ea5t b\u1ecb h\u01b0 h\u1ecfng v\u00e0 g\u1ec9 s\u00e9t l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn nh\u1ea5t m\u00e0 k\u1ef9 s\u01b0 \u0111i\u1ec7n ph\u1ea3i \u0111\u1ed1i m\u1eb7t. N\u1ebfu thi\u1ebft b\u1ecb kh\u00f4ng th\u1ec3 b\u00e1o hi\u1ec7u d\u00e2y b\u1ecb \u0111\u1ee9t, n\u00f3 kh\u00f4ng ph\u1ee5c v\u1ee5 m\u1ee5c \u0111\u00edch an to\u00e0n n\u00e0o.<\/li>\n<li>T\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9 nh\u1ea1y. Ng\u01b0\u1ee1ng 50 V v\u00e0 th\u1eddi gian ng\u1eaft 200-500 ms \u0111\u1ec3 l\u1ea1i m\u1ed9t kho\u1ea3ng r\u1ed9ng cho quy\u1ebft \u0111\u1ecbnh. Thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng theo d\u00f2ng \u0111i\u1ec7n ng\u1eaft \u1edf 30 mA trong 25-40 ms, \u0111\u00e2y l\u00e0 th\u1eddi gian gi\u00fap kh\u1ea3 n\u0103ng s\u1ed1ng s\u00f3t c\u00f3 th\u1ec3 x\u1ea3y ra. Do \u0111\u00f3, v\u1ea5n \u0111\u1ec1 v\u1ec1 th\u1eddi gian v\u00e0 d\u00f2ng \u0111i\u1ec7n li\u00ean quan \u0111\u1ebfn v\u1eadt l\u00fd rung th\u1ea5t d\u1eabn \u0111\u1ebfn m\u1ea5t hi\u1ec7u qu\u1ea3 c\u1ee7a ELCB.<\/li>\n<li>C\u00e1c ti\u00eau chu\u1ea9n \u0111\u00e3 \u0111i theo m\u1ed9t h\u01b0\u1edbng kh\u00e1c. IEC 61008 \u0111\u1ecbnh ngh\u0129a c\u00e1c y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt, hi\u1ec7u su\u1ea5t, th\u1eed nghi\u1ec7m v\u00e0 \u0111\u00e1nh d\u1ea5u cho c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng r\u00f2 kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u00edch h\u1ee3p, trong khi IEC 61009 \u0111i\u1ec1u ch\u1ec9nh hi\u1ec7u su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng. Tuy nhi\u00ean, c\u00e1c ELCB ho\u1ea1t \u0111\u1ed9ng theo \u0111i\u1ec7n \u00e1p b\u1ecb lo\u1ea1i tr\u1eeb kh\u1ecfi danh s\u00e1ch c\u00e1c y\u00eau c\u1ea7u an to\u00e0n theo ti\u00eau chu\u1ea9n hi\u1ec7n \u0111\u1ea1i, \u0111i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 ch\u00fang ch\u1ec9 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh qua c\u00e1c vi ph\u1ea1m trong l\u1ea7n ki\u1ec3m tra an to\u00e0n ti\u1ebfp theo.<\/li>\n<\/ul>\n<p>Theo \u0111\u00f3, nh\u1eefng ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m b\u1ea3o tr\u00ec c\u00e1c t\u00f2a nh\u00e0 d\u1ef1a tr\u00ean ELCB c\u0169 n\u00ean hi\u1ec3u r\u1eb1ng vi\u1ec7c thay th\u1ebf ch\u00fang kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ed5i thi\u1ebft b\u1ecb m\u00e0 l\u00e0 n\u00e2ng c\u1ea5p h\u1ec7 th\u1ed1ng d\u00e2y ti\u1ebfp \u0111\u1ea5t \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u00f9ng v\u1edbi c\u00e1c thi\u1ebft b\u1ecb c\u0169. So s\u00e1nh quan tr\u1ecdng khi b\u1ea1n \u0111\u1ebfn \u0111\u00f3 l\u00e0 gi\u1eefa c\u00e1c t\u00f9y ch\u1ecdn c\u1ea3m bi\u1ebfn d\u00f2ng \u0111i\u1ec7n hi\u1ec7n t\u1ea1i, v\u00e0 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/rccb-vs-rcbo\/\">c\u00e1ch m\u00e0 RCCB v\u00e0 RCBO kh\u00e1c nhau v\u1ec1 chi\u1ec1u r\u1ed9ng, chi ph\u00ed v\u00e0 li\u1ec7u c\u00f3 c\u1ea7n m\u1ed9t MCB ri\u00eang bi\u1ec7t hay kh\u00f4ng<\/a> l\u00e0 quy\u1ebft \u0111\u1ecbnh th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c \u0111\u01b0a ra khi n\u00e2ng c\u1ea5p.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4561\" src=\"https:\/\/huyuglobal.com\/wp-content\/uploads\/2026\/10\/ELCB-vs-RCCB-vs-RCBO-vs-MCB.webp\" alt=\"ELCB vs RCCB vs RCBO vs MCB\" width=\"1448\" height=\"1086\" \/><\/p>\n<h2>ELCB vs RCCB vs RCBO vs MCB<\/h2>\n<p>C\u00f3 b\u1ed1n lo\u1ea1i thi\u1ebft b\u1ecb, m\u1ed7i lo\u1ea1i c\u00f3 ch\u1ee9c n\u0103ng ri\u00eang bi\u1ec7t, v\u00e0 ch\u1ec9 c\u00f3 m\u1ed9t lo\u1ea1i \u0111\u00e3 b\u1ecb lo\u1ea1i b\u1ecf.<\/p>\n<ul>\n<li>MCB l\u00e0 c\u00f4ng t\u1eafc \u0111i\u1ec7n c\u01a1 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u1ea3n \u1ee9ng v\u1edbi d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c trong m\u1ea1ch. N\u00f3 c\u00f3 ph\u1ea3n \u1ee9ng t\u1ed1t v\u1edbi c\u00e1c l\u1ed7i do qu\u00e1 t\u1ea3i ho\u1eb7c ng\u1eafn m\u1ea1ch. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng ph\u1ea3n \u1ee9ng v\u1edbi b\u1ea5t k\u1ef3 d\u00f2ng l\u1ed7i n\u00e0o v\u00ec c\u00e1c d\u00f2ng n\u00e0y qu\u00e1 nh\u1ecf \u0111\u1ec3 g\u00e2y ra ho\u1ea1t \u0111\u1ed9ng c\u00f3 \u00fd ngh\u0129a c\u1ee7a thi\u1ebft b\u1ecb.<\/li>\n<li>Thi\u1ebft b\u1ecb d\u00f2ng l\u1ed7i, hay RCCB, c\u00f3 kh\u1ea3 n\u0103ng \u0111o s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng gi\u1eefa d\u00f2ng \u0111i\u1ec7n c\u1ea5p ra v\u00e0 d\u00f2ng \u0111i\u1ec7n c\u1ea5p l\u1ea1i v\u00e0 ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong tr\u01b0\u1eddng h\u1ee3p d\u00f2ng r\u00f2. Tuy nhi\u00ean, n\u00f3 kh\u00f4ng cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i b\u1ea5t k\u1ef3 d\u00f2ng qu\u00e1 t\u1ea3i n\u00e0o v\u00e0 do \u0111\u00f3 \u0111\u1ee9ng \u1edf c\u1ea5p cao h\u01a1n trong h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p, v\u1edbi c\u00e1c MCB \u0111\u01b0\u1ee3c cung c\u1ea5p b\u00ean d\u01b0\u1edbi.<\/li>\n<li>RCBO l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u1ea3 MCB v\u00e0 RCCB v\u1edbi \u01b0u \u0111i\u1ec3m l\u00e0 m\u1ea1ch lu\u00f4n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i d\u00f2ng l\u1ed7i. \u0110i\u1ec1u n\u00e0y b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng kh\u1ecfi m\u1ea5t \u0111i\u1ec7n ho\u00e0n to\u00e0n ngay c\u1ea3 khi m\u1ed9t m\u1ea1ch c\u00f3 l\u1ed7i.<\/li>\n<li>VO-ELCB l\u00e0 thi\u1ebft b\u1ecb l\u1ed7i th\u1eddi \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng c\u0169.<\/li>\n<\/ul>\n<p>Vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u1ed9 nh\u1ea1y quy\u1ebft \u0111\u1ecbnh li\u1ec7u thi\u1ebft b\u1ecb c\u00f3 th\u1ef1c s\u1ef1 c\u1ee9u s\u1ed1ng ng\u01b0\u1eddi hay kh\u00f4ng. Theo ti\u00eau chu\u1ea9n, 30 mA \u0111\u01b0\u1ee3c ch\u1ecdn cho c\u00e1c m\u1ea1ch cu\u1ed1i cung c\u1ea5p \u0111i\u1ec7n cho \u1ed5 c\u1eafm v\u00e0 c\u00e1c n\u01a1i kh\u00e1c c\u00f3 nguy hi\u1ec3m cho ng\u01b0\u1eddi; 100 mA cho thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng trong c\u00e1c m\u1ea1ch c\u1ea5p ngu\u1ed3n; v\u00e0 300 mA \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 nguy c\u01a1 ch\u00e1y. C\u1ea7n nh\u1edb r\u1eb1ng thi\u1ebft b\u1ecb 100 mA kh\u00f4ng bao gi\u1edd c\u00f3 th\u1ec3 thay th\u1ebf thi\u1ebft b\u1ecb 30 mA trong b\u1ea5t k\u1ef3 tr\u01b0\u1eddng h\u1ee3p n\u00e0o. C\u00e1c thi\u1ebft b\u1ecb nh\u01b0 <a href=\"https:\/\/huyuglobal.com\/vi\/product\/exb9l-125-type-ac-type-a-rccb-16-125a\/\">d\u1ea3i RCCB hai c\u1ef1c \u0111\u1ecbnh m\u1ee9c 16\u2013125 A trong c\u00e1c phi\u00ean b\u1ea3n Lo\u1ea1i AC v\u00e0 Lo\u1ea1i A<\/a> l\u00e0 l\u1ef1a ch\u1ecdn hi\u1ec7n \u0111\u1ea1i thay th\u1ebf cho ELCB c\u0169 t\u1ea1i c\u00f9ng v\u1ecb tr\u00ed tr\u00ean b\u1ea3ng \u0111i\u1ec7n.<\/p>\n<p>M\u1ed9t s\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng kh\u00e1c \u0111\u00e3 xu\u1ea5t hi\u1ec7n do s\u1ef1 thay \u0111\u1ed5i c\u1ee7a t\u1ea3i theo th\u1eddi gian. C\u00e1c lo\u1ea1i d\u00f2ng r\u00f2 \u2014 A.C, A, F ho\u1eb7c B \u2014 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c lo\u1ea1i d\u00f2ng r\u00f2 m\u00e0 thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft. Lo\u1ea1i A.C ch\u1ec9 \u0111i\u1ec1u khi\u1ec3n d\u00f2ng r\u00f2 s\u00f3ng sin A.C, v\u00e0 hi\u1ec7n nay \u0111\u00e3 l\u1ed7i th\u1eddi cho \u1ee9ng d\u1ee5ng trong c\u00e1c t\u1ea3i \u0111i\u1ec7n t\u1eed g\u1ea7n \u0111\u00e2y. Lo\u1ea1i A bao g\u1ed3m c\u00e1c d\u00f2ng D.C xung \u00e1p d\u1ee5ng cho h\u1ea7u h\u1ebft c\u00e1c ngu\u1ed3n \u0111i\u1ec7n ch\u1ebf \u0111\u1ed9 chuy\u1ec3n m\u1ea1ch, ngu\u1ed3n \u0111i\u1ec7n kh\u00f4ng gi\u00e1n \u0111o\u1ea1n v\u00e0 \u0111\u1ed9ng c\u01a1. Lo\u1ea1i F bao g\u1ed3m nhi\u1ec1u t\u1ea7n s\u1ed1 l\u00ean \u0111\u1ebfn m\u1ed9t kilohertz cho m\u1ed9t s\u1ed1 bi\u1ebfn t\u1ea7n m\u1ed9t pha, m\u00e1y gi\u1eb7t v\u00e0 b\u01a1m nhi\u1ec7t. Khi n\u00f3i \u0111\u1ebfn lo\u1ea1i B, ch\u00fang ta hi\u1ec7n \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn b\u1edfi IEC 62423, c\u00f3 ngh\u0129a l\u00e0 lo\u1ea1i B kh\u00f4ng ch\u1ec9 bao g\u1ed3m d\u00f2ng D.C m\u01b0\u1ee3t m\u00e0 m\u00e0 c\u00f2n l\u00e0 lo\u1ea1i c\u1ea7n thi\u1ebft cho b\u1ed9 s\u1ea1c xe \u0111i\u1ec7n, bi\u1ebfn t\u1ea7n quang \u0111i\u1ec7n c\u0169ng nh\u01b0 \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p. Ng\u00e0y nay, vi\u1ec7c ch\u1ec9 \u0111\u1ecbnh lo\u1ea1i A.C cho \u1ee9ng d\u1ee5ng l\u00e0 m\u1ed9t s\u1ef1 hi\u1ec3u l\u1ea7m r\u00f5 r\u00e0ng, \u0111i\u1ec1u n\u00e0y tr\u1edf n\u00ean r\u00f5 r\u00e0ng khi t\u1ea3i m\u00e0 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 kh\u00f4ng c\u00f2n l\u00e0 t\u1ea3i tr\u1edf n\u1eefa.<\/p>\n<h2>N\u01a1i B\u1ea1n V\u1eabn T\u00ecm Th\u1ea5y Ch\u00fang<\/h2>\n<p>C\u1ea7u dao r\u00f2 \u0111i\u1ec7n \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n \u00e1p (ELCB) v\u1eabn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c thi\u1ebft l\u1eadp nh\u00e0 \u1edf c\u0169 v\u00e0 th\u01b0\u01a1ng m\u1ea1i nh\u1eb9, c\u0169ng nh\u01b0 \u1edf m\u1ed9t s\u1ed1 n\u01a1i c\u00f4ng nghi\u1ec7p v\u1eabn s\u1eed d\u1ee5ng thi\u1ebft k\u1ebf g\u1ed1c v\u00e0 \u1edf c\u00e1c qu\u1ed1c gia n\u01a1i vi\u1ec7c s\u1eed d\u1ee5ng lo\u1ea1i n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u1ed5 bi\u1ebfn tr\u01b0\u1edbc khi c\u00f3 c\u00e1c thi\u1ebft b\u1ecb c\u1ea3m bi\u1ebfn d\u00f2ng hi\u1ec7n t\u1ea1i hi\u1ec7n nay. Th\u1ef1c t\u1ebf l\u00e0 m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb n\u00e0y v\u1eabn \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m cho v\u1ea5n \u0111\u1ec1 tr\u1edf n\u00ean ph\u1ee9c t\u1ea1p. \u0110i\u1ec1u \u0111\u00f3 l\u00e0 v\u00ec m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 v\u1ebb ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang trong m\u1ed9t h\u1ec7 th\u1ed1ng ho\u00e0n ch\u1ec9nh c\u00f3 th\u1ec3 b\u1ecb v\u00f4 hi\u1ec7u h\u00f3a b\u1edfi m\u1ed9t l\u1ed7i \u0111\u1ea5t ngay t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00f3 n\u00ean ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<p>ELCB \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n c\u00f3 v\u1ecb th\u1ebf kh\u00e1c. Vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang r\u1ea5t ph\u1ed5 bi\u1ebfn trong c\u00e1c l\u0129nh v\u1ef1c nh\u01b0 k\u1ef9 thu\u1eadt \u0111i\u1ec7n v\u00e0 c\u00f4ng ngh\u1ec7 c\u00f4ng nghi\u1ec7p \u1edf \u0110\u00f4ng Nam \u00c1 v\u00e0 \u1ea4n \u0110\u1ed9, m\u1eb7c d\u00f9 t\u00ean ch\u1ee9c n\u0103ng c\u1ee7a lo\u1ea1i thi\u1ebft b\u1ecb n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u1ed5i th\u00e0nh \u201cc\u1ea7u dao ng\u1eaft m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n\u201d (ho\u1eb7c vi\u1ebft t\u1eaft l\u00e0 \u201cRCCB\u201d). M\u1ed9t b\u1ea3ng kh\u1ed1i l\u01b0\u1ee3ng y\u00eau c\u1ea7u \u201cELCB\u201d lu\u00f4n lu\u00f4n \u0111ang y\u00eau c\u1ea7u m\u1ed9t RCCB thay v\u00e0o \u0111\u00f3. \u0110\u1ec3 x\u00e1c nh\u1eadn xem m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 ph\u1ea3i lo\u1ea1i mA hay kh\u00f4ng, c\u1ea7n ki\u1ec3m tra b\u1ea3ng d\u1eef li\u1ec7u \u0111\u1ec3 bi\u1ebft th\u00f4ng s\u1ed1 \u0111o ch\u1ea5t l\u01b0\u1ee3ng d\u1ef1 ki\u1ebfn thay v\u00ec ki\u1ec3m tra t\u00ean tr\u00ean bao b\u00ec: n\u1ebfu thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c b\u1eb1ng miliampe, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 n\u00f3 thu\u1ed9c lo\u1ea1i \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n. Quy \u01b0\u1edbc \u0111\u1eb7t t\u00ean t\u01b0\u01a1ng t\u1ef1 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng trong th\u1ef1c ti\u1ec5n khu v\u1ef1c \u1edf nh\u1eefng n\u01a1i m\u00e0 b\u1ea3o v\u1ec7 r\u00f2 \u0111\u1ea5t \u0111ang \u0111\u01b0\u1ee3c n\u00e2ng c\u1ea5p tr\u00ean c\u00e1c c\u00f4ng tr\u00ecnh x\u00e2y d\u1ef1ng c\u0169, nh\u01b0 trong c\u00e1i nh\u00ecn n\u00e0y v\u1ec1 <a href=\"https:\/\/huyuglobal.com\/vi\/blog\/earth-leakage-relay-philippines\/\">c\u00e1ch b\u1ea3o v\u1ec7 r\u00f2 \u0111\u1ea5t \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh v\u00e0 c\u1ea3i t\u1ea1o t\u1ea1i Philippines<\/a>, n\u01a1i khung m\u00e3 \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0 thi\u1ebft b\u1ecb c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng kh\u00f4ng ph\u1ea3i l\u00fac n\u00e0o c\u0169ng ph\u00f9 h\u1ee3p.<\/p>\n<h2>C\u1ea3i t\u1ea1o L\u1eafp \u0111\u1eb7t C\u0169<\/h2>\n<p>Thay th\u1ebf m\u1ed9t ELCB kh\u00f4ng \u0111\u01a1n gi\u1ea3n ch\u1ec9 l\u00e0 thay m\u1ed9t thi\u1ebft b\u1ecb b\u1eb1ng thi\u1ebft b\u1ecb kh\u00e1c. C\u1ea7n th\u1ef1c hi\u1ec7n n\u0103m ki\u1ec3m tra quan tr\u1ecdng; n\u1ebfu kh\u00f4ng, ELCB s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang, ho\u1eb7c nh\u1ea3y do l\u00fd do sai ho\u1eb7c kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng.<\/p>\n<ul>\n<li>H\u1ec7 th\u1ed1ng \u0111\u1ea5t. Trong m\u1ea1ch VO-ELCB, c\u1ea7n k\u1ebft n\u1ed1i c\u00e1c d\u00e2y d\u1eabn \u0111\u1ea5t qua thi\u1ebft b\u1ecb. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, c\u1ea7n ki\u1ec3m tra c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ea5t thay v\u00ec ch\u1ec9 d\u1ef1a v\u00e0o ch\u00fang.<\/li>\n<li>Trung t\u00ednh. C\u00e1c thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng d\u00f2ng \u0111i\u1ec7n s\u1ebd ph\u00e1t hi\u1ec7n t\u1ea5t c\u1ea3 c\u00e1c d\u00e2y pha. Do \u0111\u00f3, \u0111\u1ec3 tr\u00e1nh vi\u1ec7c ng\u1eaft m\u1ea1ch kh\u00f4ng c\u1ea7n thi\u1ebft, kh\u00f4ng n\u00ean c\u00f3 k\u1ebft n\u1ed1i \u0111\u1ea5t cho d\u00e2y trung t\u00ednh ph\u00eda sau thi\u1ebft b\u1ecb v\u00e0 t\u1ea5t c\u1ea3 c\u00e1c d\u00e2y d\u1eabn ph\u1ea3i \u0111\u01b0\u1ee3c t\u00e1ch ri\u00eang m\u00e0 kh\u00f4ng c\u00f3 \u0111i\u1ec3m n\u1ed1i \u0111\u1ea5t chung.<\/li>\n<li>\u0110\u1ed9 nh\u1ea1y v\u00e0 ph\u00e2n bi\u1ec7t. C\u1ea7n thi\u1ebft ph\u1ea3i ch\u1ecdn 30 mA cho c\u00e1c m\u1ea1ch c\u00f3 b\u1ea3o v\u1ec7 nh\u1ea1y c\u1ea3m, trong khi \u0111\u1ed1i v\u1edbi m\u1ea1ch \u00edt nh\u1ea1y c\u1ea3m h\u01a1n, ph\u1ea3i ch\u1ecdn thi\u1ebft b\u1ecb c\u00f3 d\u00f2ng \u0111\u1ecbnh m\u1ee9c t\u1eeb 100\u2013300 mA.<\/li>\n<li>Lo\u1ea1i t\u1ea3i. Lo\u1ea1i d\u00f2ng r\u00f2 c\u1ee7a ELCB ph\u1ea3i \u0111\u01b0\u1ee3c ch\u1ecdn t\u00f9y thu\u1ed9c v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a t\u1ea3i. Thi\u1ebft b\u1ecb c\u00f3 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n t\u1ed1c \u0111\u1ed9 bi\u1ebfn \u0111\u1ed5i, bi\u1ebfn t\u1ea7n ho\u1eb7c b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb DC n\u00e0o y\u00eau c\u1ea7u s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb lo\u1ea1i A, F ho\u1eb7c B thay v\u00ec ELCB lo\u1ea1i AC.<\/li>\n<li>Y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng trong c\u00f9ng m\u1ed9t m\u1ea1ch. Kh\u00f4ng gian r\u1ea5t h\u1ea1n ch\u1ebf trong t\u1ee7 \u0111i\u1ec1u khi\u1ec3n c\u00f3 th\u1ec3 y\u00eau c\u1ea7u s\u1eed d\u1ee5ng c\u00e1c m\u00f4-\u0111un \u0111\u1eb7c bi\u1ec7t k\u1ebft h\u1ee3p c\u1ea3 hai ch\u1ee9c n\u0103ng. <a href=\"https:\/\/huyuglobal.com\/vi\/product\/hum18-63n-mcb-1p-to-4p-63a-type-b-c-d\/\">MCB 63 A trong c\u1ea5u h\u00ecnh 1P \u0111\u1ebfn 4P v\u1edbi c\u00e1c \u0111\u01b0\u1eddng cong ng\u1eaft lo\u1ea1i B, C ho\u1eb7c D<\/a> l\u00e0 n\u1eeda qu\u00e1 d\u00f2ng c\u1ee7a c\u1eb7p \u0111\u00f3, v\u00e0 \u0111\u01b0\u1eddng cong ng\u1eaft \u0111\u01b0\u1ee3c ch\u1ecdn d\u1ef1a tr\u00ean d\u00f2ng kh\u1edfi \u0111\u1ed9ng c\u1ee7a b\u1ea5t k\u1ef3 m\u1ea1ch n\u00e0o m\u00e0 m\u1ea1ch \u0111\u00f3 th\u1ef1c s\u1ef1 c\u1ea5p ngu\u1ed3n.<\/li>\n<\/ul>\n<p>M\u1ed9t l\u1eddi khuy\u00ean cu\u1ed1i c\u00f9ng n\u00ean \u0111\u01b0\u1ee3c xem x\u00e9t b\u1edfi b\u1ea5t k\u1ef3 ai t\u01b0 v\u1ea5n v\u1ec1 c\u00f4ng vi\u1ec7c l\u00e0 t\u1eadn d\u1ee5ng vi\u1ec7c thay th\u1ebf ELCB \u0111\u1ec3 ki\u1ec3m tra h\u1ec7 th\u1ed1ng ti\u1ebfp \u0111\u1ea5t t\u1ed5ng th\u1ec3; thi\u1ebft b\u1ecb c\u0169 l\u00e0 l\u1eafp \u0111\u1eb7t duy nh\u1ea5t m\u00e0 ch\u1ee9c n\u0103ng \u0111\u00fang ph\u1ee5 thu\u1ed9c v\u00e0o k\u1ebft n\u1ed1i \u0111\u1ea5t n\u00e0y. N\u1ebfu k\u1ebft n\u1ed1i \u0111\u1ea5t b\u1ecb l\u1ed7i, s\u1ebd kh\u00f4ng c\u00f3 c\u1ea3nh b\u00e1o tr\u00ean l\u1eafp \u0111\u1eb7t, trong khi thi\u1ebft b\u1ecb m\u1edbi s\u1ebd kh\u00f4ng h\u1eefu \u00edch.<\/p>\n<h2>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n<h3>ELCB b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i \u0111i\u1ec1u g\u00ec?<\/h3>\n<p>R\u00f2 r\u1ec9 \u0111\u1ea5t \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u00ecnh tr\u1ea1ng d\u00f2ng \u0111i\u1ec7n tho\u00e1t ra kh\u1ecfi d\u00e2y pha qua m\u1ed9t \u0111\u01b0\u1eddng kh\u00f4ng d\u1ef1 ki\u1ebfn, c\u00f3 th\u1ec3 th\u1eadm ch\u00ed qua c\u01a1 th\u1ec3 con ng\u01b0\u1eddi. C\u00e1c thi\u1ebft b\u1ecb r\u00f2 r\u1ec9 \u0111\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng khi d\u00f2ng \u0111i\u1ec7n tr\u1edf v\u1ec1 \u0111\u1ea5t qua c\u00e1c b\u1ed9 ph\u1eadn kim lo\u1ea1i c\u1ee7a thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi \u0111\u1ea5t \u0111i\u1ec7n c\u1ee7a n\u00f3, ng\u1eaft \u1edf kho\u1ea3ng 50 V. C\u00e1c thi\u1ebft b\u1ecb r\u00f2 r\u1ec9 \u0111\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng d\u00f2ng \u0111i\u1ec7n ch\u1ed1ng l\u1ea1i ch\u00ednh d\u00f2ng r\u00f2 r\u1ec9 v\u00e0 c\u00f3 s\u1eb5n v\u1edbi c\u00e1c m\u1ee9c \u0111\u1ed9 nh\u1ea1y kh\u00e1c nhau b\u1eaft \u0111\u1ea7u t\u1eeb 10 mA \u0111\u1ebfn 300 mA (ti\u00eau chu\u1ea9n l\u00e0 30 mA \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n trong m\u1ea1ch cu\u1ed1i).<\/p>\n<h3>T\u1ea1i sao ELCB kh\u00f4ng c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng?<\/h3>\n<p>Lo\u1ea1i thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch r\u00f2 r\u1ec9 \u0111\u1ea5t ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n \u00e1p \u0111\u00e3 b\u1ecb lo\u1ea1i b\u1ecf do l\u1ed7i im l\u1eb7ng v\u00e0 kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n l\u1ed7i quan tr\u1ecdng. Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a n\u00f3 ch\u1ec9 cho ph\u00e9p ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 r\u1ec9 ch\u1ea3y qua \u0111i\u1ec7n c\u1ef1c \u0111\u1ea5t c\u1ee7a n\u00f3, v\u00e0 b\u1ea5t k\u1ef3 s\u1ef1 c\u1eaft \u0111\u1ee9t d\u00e2y d\u1eabn \u0111\u1ea5t ho\u1eb7c b\u1ea5t k\u1ef3 ti\u1ebfp \u0111\u1ea5t b\u1ed5 sung n\u00e0o trong m\u1ea1ch s\u1ebd g\u00e2y ch\u1ebft ch\u1ee9c n\u0103ng \u0111\u00fang c\u1ee7a n\u00f3 m\u00e0 kh\u00f4ng b\u00e1o hi\u1ec7u. D\u00f2ng \u0111i\u1ec7n c\u1ee7a n\u00f3 kh\u00f4ng th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n trong tr\u01b0\u1eddng h\u1ee3p con ng\u01b0\u1eddi ch\u1ea1m v\u00e0o \u0111\u1ea5t. V\u1edbi m\u1ee9c c\u1eaft kho\u1ea3ng 50 V v\u00e0 th\u1eddi gian ph\u1ea3n \u1ee9ng 200-500 ms, lo\u1ea1i ELCB ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng \u0111i\u1ec7n \u00e1p kh\u00f4ng cung c\u1ea5p m\u1ee9c b\u1ea3o v\u1ec7 s\u1ed1c \u0111i\u1ec7n ph\u00f9 h\u1ee3p. So s\u00e1nh, c\u00e1c ELCB ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng d\u00f2ng \u0111i\u1ec7n \u0111o s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n tr\u1ef1c ti\u1ebfp, ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp v\u1edbi t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u0111\u1ebfn \u0111\u1ea5t v\u00e0 ng\u1eaft trong v\u00f2ng 25-40 ms \u0111\u1ed1i v\u1edbi 30 mA.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa m\u1ea1ch GFCI v\u00e0 ELCB l\u00e0 g\u00ec?<\/h3>\n<p>Ch\u00fang gi\u1ea3i quy\u1ebft c\u00f9ng m\u1ed9t v\u1ea5n \u0111\u1ec1 b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng ng\u01b0\u1ee1ng kh\u00e1c nhau v\u00e0 \u0111i\u1ec3m tham chi\u1ebfu kh\u00e1c nhau. GFCI \u0111\u01b0\u1ee3c coi l\u00e0 s\u1ea3n ph\u1ea9m Lo\u1ea1i A theo ti\u00eau chu\u1ea9n UL c\u1ee7a M\u1ef9 v\u00e0 ph\u1ea3n \u1ee9ng v\u1edbi d\u00f2ng r\u00f2 r\u1ec9 t\u1eeb 4 \u0111\u1ebfn 6 mA trong v\u00f2ng 1\/40 gi\u00e2y theo h\u01b0\u1edbng d\u1eabn m\u00e3 an to\u00e0n c\u00f4ng c\u1ed9ng to\u00e0n qu\u1ed1c, \u1ee9ng d\u1ee5ng b\u1eaft bu\u1ed9c t\u1ea1i c\u00e1c ph\u00f2ng t\u1eafm, nh\u00e0 b\u1ebfp, gara, ngo\u00e0i tr\u1eddi v\u00e0 nhi\u1ec1u v\u1ecb tr\u00ed kh\u00e1c \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh v\u00e0 gi\u1ea3i th\u00edch b\u1edfi d\u00f2ng \u0111i\u1ec7n. Trong khi \u0111\u00f3, ELCB l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a RCCB ho\u1ea1t \u0111\u1ed9ng b\u1eb1ng d\u00f2ng \u0111i\u1ec7n theo IEC 61008. Bi\u1ebfn th\u1ec3 ph\u1ed5 bi\u1ebfn nh\u1ea5t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n c\u00f3 \u0111\u1ed9 nh\u1ea1y 30 mA. C\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng RCCB v\u1edbi c\u00e1c m\u1ee9c nh\u1ea1y 100 mA v\u00e0 300 mA cho c\u00e1c \u1ee9ng d\u1ee5ng li\u00ean quan \u0111\u1ebfn b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u1ed1ng s\u1ed1c \u0111i\u1ec7n v\u00e0 thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft v\u00e0 m\u1ea1ch ch\u1ed1ng qu\u00e1 t\u1ea3i, t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<h3>Hai lo\u1ea1i ELCB l\u00e0 g\u00ec?<\/h3>\n<p>ELCB \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n v\u00e0 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n. ELCB \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng \u0111i\u1ec7n (EO-ELCB) ph\u00e1t hi\u1ec7n s\u1ef1 t\u0103ng \u0111i\u1ec7n \u00e1p gi\u1eefa c\u1ea5u tr\u00fac kim lo\u1ea1i c\u1ee7a l\u1eafp \u0111\u1eb7t v\u00e0 \u0111i\u1ec7n c\u1ef1c n\u1ed1i \u0111\u1ea5t xa v\u00e0 ho\u1ea1t \u0111\u1ed9ng khi \u0111i\u1ec7n \u00e1p n\u00e0y v\u01b0\u1ee3t ngo\u00e0i ph\u1ea1m vi 50V. ELCB \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n \u0111o s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa d\u00f2ng \u0111i\u1ec7n ch\u1ea1y trong d\u00e2y pha v\u00e0 d\u00f2ng tr\u1ea3 v\u1ec1 tr\u00ean d\u00e2y trung t\u00ednh, v\u00e0 ho\u1ea1t \u0111\u1ed9ng do s\u1ef1 ch\u00eanh l\u1ec7ch trong d\u00f2ng \u0111i\u1ec7n; thu\u1eadt ng\u1eef n\u00e0y \u0111\u01b0\u1ee3c IEC x\u00e1c nh\u1eadn, \u0111\u00e2y l\u00e0 t\u00ean th\u1ef1c t\u1ebf m\u00e0 ch\u00fang ta s\u1eed d\u1ee5ng tr\u00ean th\u1ecb tr\u01b0\u1eddng ng\u00e0y nay d\u01b0\u1edbi d\u1ea1ng RCCB, RCD ho\u1eb7c RCBO. Ph\u1ea7n l\u1edbn c\u00e1c thi\u1ebft b\u1ecb c\u00f3 tr\u00ean th\u1ecb tr\u01b0\u1eddng l\u00e0 \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n, v\u00e0 vi\u1ec7c ki\u1ec3m tra \u0111\u1ed9 nh\u1ea1y c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ecdn b\u1eb1ng milliamp l\u00e0 l\u1ef1a ch\u1ecdn d\u1ec5 d\u00e0ng nh\u1ea5t.<\/p>\n<h2>T\u00e0i li\u1ec7u tham kh\u1ea3o<\/h2>\n<ol>\n<li><a href=\"https:\/\/www.iec.ch\/\" rel=\"nofollow noopener\" target=\"_blank\">\u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf \u2014 IEC 61008 (RCCBs), IEC 61009 (RCBOs) v\u00e0 IEC 62423 (Lo\u1ea1i F v\u00e0 B)<\/a><\/li>\n<li><a href=\"https:\/\/www.shopulstandards.com\/ProductDetail.aspx?productId=UL943\" rel=\"nofollow noopener\" target=\"_blank\">Ti\u00eau chu\u1ea9n &amp; Tham gia UL \u2014 UL 943, B\u1ed9 ng\u1eaft m\u1ea1ch r\u00f2 \u0111i\u1ec7n<\/a><\/li>\n<li><a href=\"https:\/\/www.nfpa.org\/codes-and-standards\/nfpa-70-standard-development\/70\" rel=\"nofollow noopener\" target=\"_blank\">NFPA 70, M\u00e3 \u0111i\u1ec7n qu\u1ed1c gia \u2014 \u0110i\u1ec1u 210.8, b\u1ea3o v\u1ec7 b\u1ed9 ng\u1eaft m\u1ea1ch r\u00f2 r\u1ec9 d\u00f2ng \u0111i\u1ec7n<\/a><\/li>\n<li><a href=\"https:\/\/www.ul.com\/\" rel=\"nofollow noopener\" target=\"_blank\">UL Solutions \u2014 ch\u1ee9ng nh\u1eadn an to\u00e0n \u0111i\u1ec7n cho c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7<\/a><\/li>\n<li><a href=\"https:\/\/www.hager.com\/\" rel=\"nofollow noopener\" target=\"_blank\">Hager \u2014 h\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn v\u00e0 \u1ee9ng d\u1ee5ng thi\u1ebft b\u1ecb d\u00f2ng d\u01b0<\/a><\/li>\n<\/ol>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>ELCB cho ch\u00fang ta th\u1ea5y t\u1ea7m quan tr\u1ecdng c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng thu\u1eadt ng\u1eef ch\u00ednh x\u00e1c trong b\u1ea3o v\u1ec7 \u0111i\u1ec7n. M\u1ed9t thi\u1ebft b\u1ecb ph\u00e1t hi\u1ec7n s\u1ef1 t\u0103ng \u0111i\u1ec7n \u00e1p v\u00e0 ch\u1ec9 b\u1ea3o v\u1ec7 kim lo\u1ea1i k\u1ebft n\u1ed1i v\u1edbi \u0111i\u1ec7n c\u1ef1c c\u1ee7a ch\u00ednh n\u00f3. Tuy nhi\u00ean, thi\u1ebft b\u1ecb kh\u00e1c \u0111o s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n v\u00e0 b\u1ea3o v\u1ec7 ng\u01b0\u1eddi s\u1eed d\u1ee5ng c\u00f4ng c\u1ee5. Hai thi\u1ebft b\u1ecb n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c g\u1ecdi c\u00f9ng t\u00ean trong nhi\u1ec1u n\u0103m, khi\u1ebfn IEC ph\u1ea3i thay \u0111\u1ed5i t\u00ean g\u1ecdi c\u1ee7a thi\u1ebft b\u1ecb c\u00f2n t\u1ed3n t\u1ea1i. Khi b\u1ea1n g\u1eb7p m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ghi ELCB, \u0111i\u1ec1u \u0111\u1ea7u ti\u00ean c\u1ea7n t\u00ecm l\u00e0 \u0111\u1ed9 nh\u1ea1y c\u1ee7a n\u00f3, t\u00ednh b\u1eb1ng milliamp. N\u1ebfu th\u00f4ng s\u1ed1 n\u00e0y kh\u00f4ng c\u00f3 trong th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt th\u00ec b\u1ea1n \u0111ang xem m\u1ed9t thi\u1ebft b\u1ecb l\u1ebd ra \u0111\u00e3 ph\u1ea3i \u0111\u01b0\u1ee3c thay th\u1ebf b\u1eb1ng b\u1ed9 ng\u1eaft m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n t\u1eeb l\u00e2u r\u1ed3i.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>An ELCB protects people against electric shocks due to earth leakage, i.e., live currents leaking through damaged insulation materials, water, or even a human body. However, this name refers to two completely different instruments, and only one of them is produced today. The voltage-operated type protected against the presence of a raised voltage level at [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4559,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_gspb_post_css":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-4558","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\/4558","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=4558"}],"version-history":[{"count":2,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/4558\/revisions"}],"predecessor-version":[{"id":4563,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/posts\/4558\/revisions\/4563"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media\/4559"}],"wp:attachment":[{"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/media?parent=4558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/categories?post=4558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/huyuglobal.com\/vi\/wp-json\/wp\/v2\/tags?post=4558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}