{"id":18935,"date":"2025-07-26T12:19:32","date_gmt":"2025-07-26T04:19:32","guid":{"rendered":"https:\/\/viox.com\/?p=18935"},"modified":"2026-03-28T16:08:02","modified_gmt":"2026-03-28T08:08:02","slug":"why-use-rccb-instead-of-mcb","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/why-use-rccb-instead-of-mcb\/","title":{"rendered":"RCCB so v\u1edbi MCB: T\u1ea1i sao n\u00ean s\u1eed d\u1ee5ng RCCB thay v\u00ec MCB \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt?"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>Tr\u1ea3 l\u1eddi tr\u1ef1c ti\u1ebfp<\/h2>\n<p>B\u1ea1n kh\u00f4ng s\u1eed d\u1ee5ng RCCB thay cho MCB cho m\u1ecdi m\u1ee5c \u0111\u00edch. B\u1ea1n s\u1eed d\u1ee5ng RCCB <strong>RCCB<\/strong> khi b\u1ea1n c\u1ea7n <strong>b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt v\u00e0 r\u00f2 r\u1ec9 \u0111\u1ea5t<\/strong>, v\u00e0 b\u1ea1n s\u1eed d\u1ee5ng MCB <strong>MCB<\/strong> khi b\u1ea1n c\u1ea7n <strong>b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch<\/strong>. Trong h\u1ea7u h\u1ebft c\u00e1c c\u00e0i \u0111\u1eb7t th\u1ef1c t\u1ebf, c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang kh\u00f4ng ph\u1ea3i l\u00e0 RCCB <em>hay<\/em> MCB, m\u00e0 l\u00e0 <strong>RCCB + MCB c\u00f9ng nhau<\/strong>, ho\u1eb7c m\u1ed9t thi\u1ebft b\u1ecb duy nh\u1ea5t <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a> k\u1ebft h\u1ee3p c\u1ea3 hai ch\u1ee9c n\u0103ng.<\/p>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u00f3 r\u1ea5t quan tr\u1ecdng v\u00ec MCB <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 c\u00e1p v\u00e0 thi\u1ebft b\u1ecb kh\u1ecfi d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c, nh\u01b0ng n\u00f3 kh\u00f4ng th\u1ec3 ph\u00e1t hi\u1ec7n c\u00e1c d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 nh\u1ecf c\u00f3 th\u1ec3 \u0111i qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi. RCCB <a href=\"https:\/\/test.viox.com\/vi\/rccb\/\">RCCB<\/a> \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 ph\u00e1t hi\u1ec7n s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng \u0111\u00f3 v\u00e0 ng\u1eaft m\u1ea1ch \u0111\u1ee7 nhanh \u0111\u1ec3 gi\u1ea3m nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt.<\/p>\n<p>N\u1ebfu c\u00e2u h\u1ecfi th\u1ef1c s\u1ef1 c\u1ee7a b\u1ea1n l\u00e0 \u201cthi\u1ebft b\u1ecb n\u00e0o b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi\u201d, th\u00ec c\u00e2u tr\u1ea3 l\u1eddi r\u1ea5t \u0111\u01a1n gi\u1ea3n: <strong>RCCB b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi kh\u1ecfi c\u00e1c s\u1ef1 c\u1ed1 r\u00f2 r\u1ec9 \u0111\u1ea5t; MCB b\u1ea3o v\u1ec7 d\u00e2y d\u1eabn kh\u1ecfi c\u00e1c s\u1ef1 c\u1ed1 qu\u00e1 d\u00f2ng.<\/strong> Trong thi\u1ebft k\u1ebf th\u1ef1c t\u1ebf, \u0111i\u1ec1u \u0111\u00f3 th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 ph\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p v\u1edbi b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p \u0111\u00fang c\u00e1ch thay v\u00ec \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t s\u1ef1 thay th\u1ebf \u0111\u1ed9c l\u1eadp.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/RCCB-and-MCB-installed-side-by-side-in-a-low-voltage-distribution-board.webp\" alt=\"RCCB and MCB installed side by side in a low voltage distribution board\" \/><figcaption><em>G\u00f3c nh\u00ecn l\u1eafp \u0111\u1eb7t: RCCB v\u00e0 MCB \u0111\u01b0\u1ee3c g\u1eafn c\u1ea1nh nhau trong t\u1ee7 \u0111i\u1ec7n h\u1ea1 th\u1ebf \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111i\u1ec7n to\u00e0n di\u1ec7n.<\/em><\/figcaption><\/figure>\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li>RCCB v\u00e0 MCB kh\u00f4ng ph\u1ea3i l\u00e0 c\u00e1c thi\u1ebft b\u1ecb thay th\u1ebf cho nhau. Ch\u00fang b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c lo\u1ea1i s\u1ef1 c\u1ed1 kh\u00e1c nhau.<\/li>\n<li>C\u00f4ng vi\u1ec7c thi\u1ebft y\u1ebfu c\u1ee7a RCCB l\u00e0 ph\u00e1t hi\u1ec7n s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n gi\u1eefa d\u00e2y d\u1eabn pha v\u00e0 d\u00e2y trung t\u00ednh.<\/li>\n<li>M\u1ed9t <code>MCB<\/code> kh\u00f4ng <strong>kh\u00f4ng<\/strong> cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u00e1 nh\u00e2n.<\/li>\n<li>Trong h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i nh\u1ecf, chi\u1ebfn l\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u0111\u00fang \u0111\u1eafn l\u00e0 <strong>MCB + RCCB<\/strong> hay <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a>.<\/li>\n<li>\u1ede nhi\u1ec1u th\u1ecb tr\u01b0\u1eddng, <code>RCB<\/code> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch l\u1ecfng l\u1ebbo cho c\u00e1c thi\u1ebft b\u1ecb d\u00f2ng d\u01b0, trong khi <code>RCCB<\/code> l\u00e0 thu\u1eadt ng\u1eef ch\u00ednh x\u00e1c h\u01a1n.<\/li>\n<\/ul>\n<h2>RCCB so v\u1edbi MCB: S\u1ef1 kh\u00e1c bi\u1ec7t c\u1ed1t l\u00f5i<\/h2>\n<p>C\u00e1ch r\u00f5 r\u00e0ng nh\u1ea5t \u0111\u1ec3 so s\u00e1nh ch\u00fang l\u00e0 xem x\u00e9t l\u1ed7i m\u00e0 m\u1ed7i thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o \u0111\u1ec3 ph\u00e1t hi\u1ec7n.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-infographic-comparing-RCCB-and-MCB-by-function-and-protection-type.webp\" alt=\"Technical infographic comparing RCCB and MCB by function and protection type\" \/><figcaption><em>Bi\u1ec3u \u0111\u1ed3 th\u00f4ng tin so s\u00e1nh k\u1ef9 thu\u1eadt chi ti\u1ebft c\u00e1c ch\u1ee9c n\u0103ng v\u00e0 lo\u1ea1i b\u1ea3o v\u1ec7 kh\u00e1c nhau c\u1ee7a RCCB so v\u1edbi MCB.<\/em><\/figcaption><\/figure>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7<\/th>\n<th style=\"padding: 8px;\">H\u00ecnh th\u1ee9c \u0111\u1ea7y \u0111\u1ee7<\/th>\n<th style=\"padding: 8px;\">C\u00f4ng vi\u1ec7c ch\u00ednh<\/th>\n<th style=\"padding: 8px;\">Ph\u00e1t hi\u1ec7n<\/th>\n<th style=\"padding: 8px;\">N\u00f3 c\u00f3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt kh\u00f4ng?<\/th>\n<th style=\"padding: 8px;\">Vai tr\u00f2 \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">RCCB<\/td>\n<td style=\"padding: 8px;\">B\u1ed9 ng\u1eaft m\u1ea1ch d\u00f2ng d\u01b0<\/td>\n<td style=\"padding: 8px;\">Ng\u1eaft m\u1ea1ch khi d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t<\/td>\n<td style=\"padding: 8px;\">R\u00f2 r\u1ec9 \u0111\u1ea5t \/ m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng d\u01b0<\/td>\n<td style=\"padding: 8px;\">C\u00f3, \u0111\u1ed1i v\u1edbi nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt do ch\u1ea1m \u0111\u1ea5t<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n v\u00e0 b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">MCB<\/td>\n<td style=\"padding: 8px;\">M\u00e1y c\u1eaft m\u1ea1ch thu nh\u1ecf<\/td>\n<td style=\"padding: 8px;\">Ng\u1eaft m\u1ea1ch khi d\u00f2ng \u0111i\u1ec7n v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n \u0111\u1ecbnh m\u1ee9c<\/td>\n<td style=\"padding: 8px;\">Qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch<\/td>\n<td style=\"padding: 8px;\">Kh\u00f4ng c\u00f3<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng m\u1ea1ch nh\u00e1nh<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCBO<\/td>\n<td style=\"padding: 8px;\">Thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch d\u00f2ng d\u01b0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/td>\n<td style=\"padding: 8px;\">K\u1ebft h\u1ee3p c\u1ea3 hai ch\u1ee9c n\u0103ng trong m\u1ed9t thi\u1ebft b\u1ecb<\/td>\n<td style=\"padding: 8px;\">R\u00f2 r\u1ec9 \u0111\u1ea5t + qu\u00e1 t\u1ea3i + ng\u1eafn m\u1ea1ch<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 k\u1ebft h\u1ee3p khi kh\u00f4ng gian ho\u1eb7c t\u00ednh ch\u1ecdn l\u1ecdc quan tr\u1ecdng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao so s\u00e1nh <a href=\"https:\/\/test.viox.com\/vi\/rccb\/\">RCCB<\/a> v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> nh\u01b0 th\u1ec3 ch\u00fang c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau l\u00e0 g\u00e2y hi\u1ec3u l\u1ea7m. Ch\u00fang kh\u00f4ng th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau v\u1ec1 ch\u1ee9c n\u0103ng. Ch\u00fang l\u00e0 c\u00e1c thi\u1ebft b\u1ecb b\u1ed5 sung.<\/p>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n b\u1ea3n \u0111\u1ed3 thu\u1eadt ng\u1eef r\u1ed9ng h\u01a1n, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/what-is-the-difference-between-mcb-mccb-rcb-rcd-rccb-and-rcbo\/\">S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB, MCCB, RCB, RCD, RCCB v\u00e0 RCBO l\u00e0 g\u00ec?<\/a>.<\/p>\n<h2>Ch\u1ee9c n\u0103ng c\u1ee7a RCCB l\u00e0 g\u00ec?<\/h2>\n<p>RCCB so s\u00e1nh d\u00f2ng \u0111i\u1ec7n \u0111i ra tr\u00ean d\u00e2y d\u1eabn pha v\u1edbi d\u00f2ng \u0111i\u1ec7n tr\u1edf l\u1ea1i tr\u00ean d\u00e2y d\u1eabn trung t\u00ednh.<\/p>\n<p>Trong \u0111i\u1ec1u ki\u1ec7n b\u00ecnh th\u01b0\u1eddng:<\/p>\n<ul>\n<li>d\u00f2ng \u0111i\u1ec7n ra = d\u00f2ng \u0111i\u1ec7n v\u1ec1<\/li>\n<li>s\u1ef1 c\u00e2n b\u1eb1ng t\u1eeb t\u00ednh b\u00ean trong thi\u1ebft b\u1ecb v\u1eabn \u1ed5n \u0111\u1ecbnh<\/li>\n<li>RCCB v\u1eabn \u0111\u00f3ng<\/li>\n<\/ul>\n<p>Trong \u0111i\u1ec1u ki\u1ec7n ch\u1ea1m \u0111\u1ea5t:<\/p>\n<ul>\n<li>m\u1ed9t s\u1ed1 d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t th\u00f4ng qua l\u1edbp c\u00e1ch \u0111i\u1ec7n b\u1ecb h\u1ecfng, v\u1ecf kim lo\u1ea1i, h\u01a1i \u1ea9m ho\u1eb7c c\u01a1 th\u1ec3 ng\u01b0\u1eddi<\/li>\n<li>d\u00f2ng \u0111i\u1ec7n ra kh\u00f4ng c\u00f2n b\u1eb1ng d\u00f2ng \u0111i\u1ec7n v\u1ec1<\/li>\n<li>RCCB ph\u00e1t hi\u1ec7n s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng<\/li>\n<li>thi\u1ebft b\u1ecb ng\u1eaft v\u00e0 ng\u1eaft m\u1ea1ch<\/li>\n<\/ul>\n<p>\u0110\u00e2y l\u00e0 \u0111i\u1ec1u l\u00e0m cho RCCB kh\u00e1c v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch qu\u00e1 d\u00f2ng ti\u00eau chu\u1ea9n. N\u00f3 kh\u00f4ng t\u00ecm ki\u1ebfm \u201cqu\u00e1 nhi\u1ec1u d\u00f2ng \u0111i\u1ec7n\u201d theo ngh\u0129a th\u00f4ng th\u01b0\u1eddng. N\u00f3 \u0111ang t\u00ecm ki\u1ebfm <strong>d\u00f2ng \u0111i\u1ec7n b\u1ecb thi\u1ebfu<\/strong> \u0111\u00e3 \u0111i theo m\u1ed9t con \u0111\u01b0\u1eddng kh\u00f4ng mong mu\u1ed1n.<\/p>\n<p>V\u00ec thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 b\u1ecb h\u1ecfng v\u1ec1 m\u1eb7t c\u01a1 h\u1ecdc ho\u1eb7c \u0111i\u1ec7n theo th\u1eddi gian, n\u00ean vi\u1ec7c ki\u1ec3m tra th\u01b0\u1eddng xuy\u00ean r\u1ea5t quan tr\u1ecdng. N\u00fat <code>T<\/code> hay <code>B\u00e0i ki\u1ec3m tra<\/code> t\u00edch h\u1ee3p s\u1eb5n ph\u1ea3i l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a nh\u1eadn th\u1ee9c b\u1ea3o tr\u00ec th\u00f4ng th\u01b0\u1eddng. Nh\u1ea5n n\u00f3 x\u00e1c nh\u1eadn r\u1eb1ng thi\u1ebft b\u1ecb v\u1eabn c\u00f3 th\u1ec3 ng\u1eaft, m\u1eb7c d\u00f9 n\u00f3 kh\u00f4ng thay th\u1ebf cho vi\u1ec7c ki\u1ec3m tra b\u1eb1ng d\u1ee5ng c\u1ee5 trong qu\u00e1 tr\u00ecnh ki\u1ec3m tra chuy\u00ean nghi\u1ec7p.<\/p>\n<p>\u0110\u1ec3 c\u00f3 gi\u1ea3i th\u00edch s\u00e2u h\u01a1n v\u1ec1 c\u00e1c m\u1ed1i nguy hi\u1ec3m do d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/understanding-ground-fault-protection\/\">Hi\u1ec3u v\u1ec1 b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ed7i ti\u1ebfp \u0111\u1ea5t<\/a>.<\/p>\n<h2>T\u1ea1i sao MCB kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi kh\u1ecfi \u0111i\u1ec7n gi\u1eadt<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-showing-why-an-MCB-does-not-provide-personal-shock-protection.webp\" alt=\"Technical diagram showing why an MCB does not provide personal shock protection\" \/><figcaption><em>S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt gi\u1ea3i th\u00edch c\u00e1c \u0111\u01b0\u1eddng d\u1eabn \u0111i\u1ec7n v\u00e0 l\u00fd do t\u1ea1i sao MCB ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 cung c\u1ea5p b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u00e1 nh\u00e2n.<\/em><\/figcaption><\/figure>\n<p>MCB ng\u1eaft khi d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 ng\u01b0\u1ee1ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf c\u1ee7a n\u00f3. M\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 b\u1ecb \u0111i\u1ec7n gi\u1eadt nguy hi\u1ec3m ho\u1eb7c th\u1eadm ch\u00ed g\u00e2y t\u1eed vong \u1edf m\u1ee9c r\u00f2 r\u1ec9 th\u1ea5p h\u01a1n nhi\u1ec1u so v\u1edbi d\u00f2ng \u0111i\u1ec7n c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u1eaft m\u1ed9t MCB th\u00f4ng th\u01b0\u1eddng. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0:<\/p>\n<ul>\n<li>MCB 6 A, 10 A, 16 A ho\u1eb7c 32 A c\u00f3 th\u1ec3 v\u1eabn \u0111\u00f3ng<\/li>\n<li>d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 c\u00f3 th\u1ec3 v\u1eabn \u0111\u1ee7 cao \u0111\u1ec3 g\u00e2y th\u01b0\u01a1ng t\u00edch ho\u1eb7c gi\u1ebft ng\u01b0\u1eddi<\/li>\n<li>MCB \u0111ang l\u00e0m ch\u00ednh x\u00e1c nh\u1eefng g\u00ec n\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u00e0m, nh\u01b0ng lo\u1ea1i s\u1ef1 c\u1ed1 n\u1eb1m ngo\u00e0i c\u00f4ng vi\u1ec7c c\u1ee7a n\u00f3<\/li>\n<\/ul>\n<p>\u0110i\u1ec1u n\u00e0y tr\u1edf n\u00ean d\u1ec5 hi\u1ec3u h\u01a1n khi b\u1ea1n so s\u00e1nh m\u1ee9c d\u00f2ng \u0111i\u1ec7n qua c\u01a1 th\u1ec3 ng\u01b0\u1eddi v\u1edbi \u0111\u1ecbnh m\u1ee9c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch. Trong th\u1ef1c t\u1ebf an to\u00e0n \u0111i\u1ec7n h\u1ea1 th\u1ebf, <code>50 V AC<\/code> th\u01b0\u1eddng \u0111\u01b0\u1ee3c coi l\u00e0 ng\u01b0\u1ee1ng \u0111i\u1ec7n \u00e1p ti\u1ebfp x\u00fac th\u00f4ng th\u01b0\u1eddng quan tr\u1ecdng trong \u0111i\u1ec1u ki\u1ec7n kh\u00f4 r\u00e1o b\u00ecnh th\u01b0\u1eddng, nh\u01b0ng k\u1ebft qu\u1ea3 s\u1ed1c th\u1ef1c t\u1ebf v\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o \u0111i\u1ec7n tr\u1edf c\u1ee7a c\u01a1 th\u1ec3, \u0111i\u1ec1u ki\u1ec7n ti\u1ebfp x\u00fac, \u0111\u1ed9 \u1ea9m c\u1ee7a da v\u00e0 \u0111\u01b0\u1eddng \u0111i c\u1ee7a d\u00f2ng \u0111i\u1ec7n qua c\u01a1 th\u1ec3. Khi d\u00f2ng \u0111i\u1ec7n t\u0103ng l\u00ean h\u00e0ng ch\u1ee5c miliampe, r\u1ee7i ro tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng ngay c\u1ea3 khi n\u00f3 v\u1eabn c\u00f2n r\u1ea5t nh\u1ecf so v\u1edbi d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a m\u1ed9t MCB nh\u00e1nh.<\/p>\n<p>\u0110\u00f3 l\u00e0 kho\u1ea3ng tr\u1ed1ng b\u1ea3o v\u1ec7:<\/p>\n<ul>\n<li>m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 b\u1ecb ph\u01a1i nhi\u1ec5m d\u00f2ng \u0111i\u1ec7n r\u00f2 nguy hi\u1ec3m \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng miliampe<\/li>\n<li>m\u1ed9t MCB ti\u00eau chu\u1ea9n \u0111ang ch\u1edd d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c \u0111o b\u1eb1ng ampe<\/li>\n<li>c\u00fa s\u1ed1c c\u00f3 th\u1ec3 nghi\u00eam tr\u1ecdng r\u1ea5t l\u00e2u tr\u01b0\u1edbc khi MCB ph\u00e1t hi\u1ec7n ra b\u1ea5t k\u1ef3 \u0111i\u1ec1u g\u00ec b\u1ea5t th\u01b0\u1eddng<\/li>\n<\/ul>\n<p>\u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t t\u1ee7 \u0111i\u1ec7n c\u00f3 th\u1ec3 c\u00f3 v\u1ebb \u201c\u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 ho\u00e0n to\u00e0n\u201d nh\u01b0ng v\u1eabn kh\u00f4ng an to\u00e0n t\u1eeb g\u00f3c \u0111\u1ed9 b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n n\u1ebfu n\u00f3 ch\u1ec9 ch\u1ee9a MCB.<\/p>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n phi\u00ean b\u1ea3n an to\u00e0n cho ch\u1ee7 nh\u00e0 r\u1ed9ng h\u01a1n v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/why-circuit-breakers-dont-protect-people\/\">T\u1ea1i sao b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng b\u1ea3o v\u1ec7 con ng\u01b0\u1eddi<\/a>.<\/p>\n<h2>Khi n\u00e0o b\u1ea1n n\u00ean s\u1eed d\u1ee5ng RCCB thay v\u00ec MCB?<\/h2>\n<p>C\u00e1ch di\u1ec5n \u0111\u1ea1t <code>t\u1ea1i sao s\u1eed d\u1ee5ng RCCB thay v\u00ec MCB<\/code> c\u1ea7n m\u1ed9t ch\u1ec9nh s\u1eeda k\u1ef9 thu\u1eadt: trong h\u1ea7u h\u1ebft c\u00e1c c\u00e0i \u0111\u1eb7t, b\u1ea1n kh\u00f4ng n\u00ean thay th\u1ebf ho\u00e0n to\u00e0n ch\u1ee9c n\u0103ng MCB. B\u1ea1n n\u00ean th\u00eam ch\u1ee9c n\u0103ng b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 c\u00f2n thi\u1ebfu.<\/p>\n<p>Trong th\u1ef1c t\u1ebf, h\u00e3y ch\u1ecdn <code>RCCB<\/code> n\u01a1i m\u1ed1i quan t\u00e2m thi\u1ebft k\u1ebf ch\u00ednh l\u00e0 <strong>nguy c\u01a1 s\u1ed1c \u0111i\u1ec7n ho\u1eb7c r\u00f2 r\u1ec9 \u0111\u1ea5t<\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong:<\/p>\n<ul>\n<li>ph\u00f2ng t\u1eafm<\/li>\n<li>nh\u00e0 b\u1ebfp<\/li>\n<li>ph\u00f2ng gi\u1eb7t \u1ee7i<\/li>\n<li>\u1ed5 c\u1eafm v\u00e0 \u0111\u00e8n chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi<\/li>\n<li>nh\u00e0 \u0111\u1ec3 xe v\u00e0 x\u01b0\u1edfng<\/li>\n<li>m\u1ea1ch ph\u1ee5c v\u1ee5 c\u00e1c c\u00f4ng c\u1ee5 di \u0111\u1ed9ng<\/li>\n<li>m\u00f4i tr\u01b0\u1eddng \u1ea9m \u01b0\u1edbt ho\u1eb7c d\u1eabn \u0111i\u1ec7n<\/li>\n<\/ul>\n<p>Ch\u1ecdn <code>MCB<\/code> n\u01a1i m\u1ed1i quan t\u00e2m thi\u1ebft k\u1ebf ch\u00ednh l\u00e0:<\/p>\n<ul>\n<li>b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i<\/li>\n<li>b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch<\/li>\n<li>b\u1ea3o v\u1ec7 c\u00e1p m\u1ea1ch nh\u00e1nh<\/li>\n<li>b\u1ea3o v\u1ec7 d\u00e2y d\u1eabn h\u1ea1 l\u01b0u v\u00e0 t\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i kh\u1ecfi d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c<\/li>\n<\/ul>\n<p>Ch\u1ecdn <strong>RCCB + MCB c\u00f9ng nhau<\/strong> khi b\u1ea1n c\u1ea7n c\u1ea3 hai:<\/p>\n<ul>\n<li>b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n<\/li>\n<li>b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng cho c\u00e1p v\u00e0 thi\u1ebft b\u1ecb<\/li>\n<\/ul>\n<p>Ch\u1ecdn <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a> khi b\u1ea1n mu\u1ed1n c\u1ea3 hai ch\u1ee9c n\u0103ng trong m\u1ed9t thi\u1ebft b\u1ecb v\u00e0 c\u1ea7n:<\/p>\n<ul>\n<li>b\u1ea3o v\u1ec7 m\u1ea1ch ri\u00eang l\u1ebb<\/li>\n<li>\u00edt t\u00e1c \u0111\u1ed9ng g\u00e2y v\u1ea5p chung h\u01a1n<\/li>\n<li>b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 m\u1ea1ch \u0111\u01a1n gi\u1ea3n h\u01a1n<\/li>\n<\/ul>\n<p>N\u1ebfu RCBO l\u00e0 m\u1ed9t ph\u1ea7n trong l\u1ed9 tr\u00ecnh thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/how-to-select-the-right-rcbo\/\">C\u00e1ch ch\u1ecdn RCBO ph\u00f9 h\u1ee3p<\/a>.<\/p>\n<h2>RCCB so v\u1edbi MCB trong c\u00e1c c\u00e0i \u0111\u1eb7t th\u1ef1c t\u1ebf<\/h2>\n<p>Trong h\u1ea7u h\u1ebft c\u00e1c b\u1ea3ng th\u1ef1c t\u1ebf, h\u1ec7 th\u1ed1ng ph\u00e2n c\u1ea5p b\u1ea3o v\u1ec7 tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0y:<\/p>\n<ol>\n<li>Nh\u1eefng <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> b\u1ea3o v\u1ec7 m\u1ea1ch ch\u1ed1ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch.<\/li>\n<li>Nh\u1eefng <a href=\"https:\/\/test.viox.com\/vi\/rccb\/\">RCCB<\/a> gi\u00e1m s\u00e1t r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t.<\/li>\n<li>S\u1ef1 k\u1ebft h\u1ee3p n\u00e0y b\u1ea3o v\u1ec7 c\u1ea3 c\u00e0i \u0111\u1eb7t v\u00e0 ng\u01b0\u1eddi d\u00f9ng.<\/li>\n<\/ol>\n<p>\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao thi\u1ebft k\u1ebf b\u1ea3ng chuy\u00ean nghi\u1ec7p hi\u1ebfm khi \u0111\u00f3ng khung quy\u1ebft \u0111\u1ecbnh nh\u01b0 m\u1ed9t s\u1ef1 thay th\u1ebf thu\u1ea7n t\u00fay. Trong c\u00e1c c\u00e0i \u0111\u1eb7t th\u1ef1c \u0111\u1ecba, c\u00e1c c\u00e2u h\u1ecfi h\u1eefu \u00edch h\u01a1n l\u00e0:<\/p>\n<ul>\n<li>M\u1ea1ch n\u00e0y c\u00f3 c\u1ea7n b\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 c\u00e1 nh\u00e2n kh\u00f4ng?<\/li>\n<li>B\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng \u0111\u00e3 c\u00f3 ch\u01b0a?<\/li>\n<li>RCCB d\u00f9ng chung c\u00f3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c kh\u00f4ng, hay RCBO cho m\u1ed7i m\u1ea1ch t\u1ed1t h\u01a1n?<\/li>\n<li>\u0110\u1ed9 nh\u1ea1y d\u00f2ng d\u01b0 n\u00e0o l\u00e0 ph\u00f9 h\u1ee3p?<\/li>\n<\/ul>\n<p>\u0110\u00f3 l\u00e0 m\u1ee9c m\u00e0 l\u1ef1a ch\u1ecdn tr\u1edf th\u00e0nh m\u1ed9t quy\u1ebft \u0111\u1ecbnh thi\u1ebft k\u1ebf thay v\u00ec m\u1ed9t c\u00e2u h\u1ecfi v\u1ec1 b\u1ea3ng ch\u00fa gi\u1ea3i.<\/p>\n<h2>RCCB + MCB so v\u1edbi RCBO: Kh\u1ea3 n\u0103ng c\u1eaft v\u00e0 b\u1ea3o v\u1ec7 d\u1ef1 ph\u00f2ng<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Technical-diagram-comparing-RCCB-plus-MCB-with-RCBO-protection-architecture.webp\" alt=\"Technical diagram comparing RCCB plus MCB with RCBO protection architecture\" \/><figcaption><em>S\u01a1 \u0111\u1ed3 so s\u00e1nh c\u1ea5u h\u00ecnh RCCB + MCB so v\u1edbi ki\u1ebfn tr\u00fac b\u1ea3o v\u1ec7 RCBO t\u00edch h\u1ee3p.<\/em><\/figcaption><\/figure>\n<p>\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ec3m tra thi\u1ebft k\u1ebf quan tr\u1ecdng nh\u1ea5t trong to\u00e0n b\u1ed9 cu\u1ed9c th\u1ea3o lu\u1eadn.<\/p>\n<p>RCCB ch\u1ee7 y\u1ebfu l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0. N\u00f3 kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ecdn theo c\u00e1ch t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 trong thi\u1ebft k\u1ebf b\u1ea3ng \u0111i\u1ec7n th\u1ef1c t\u1ebf, n\u00f3 th\u01b0\u1eddng d\u1ef1a v\u00e0o b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch ng\u01b0\u1ee3c d\u00f2ng ho\u1eb7c \u0111\u1ed3ng h\u00e0nh \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p ch\u00ednh x\u00e1c. \u0110\u00f3 l\u00e0 l\u00fd do t\u1ea1i sao m\u1ed9t nh\u00e0 thi\u1ebft k\u1ebf b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n kh\u00f4ng th\u1ec3 d\u1eebng l\u1ea1i \u1edf \u0111\u1ed9 nh\u1ea1y r\u00f2 r\u1ec9.<\/p>\n<p>Khi \u0111\u00e1nh gi\u00e1 m\u1ed9t <code>RCCB + MCB<\/code> s\u1eafp x\u1ebfp, c\u00e1c k\u1ef9 s\u01b0 n\u00ean x\u00e1c minh:<\/p>\n<ul>\n<li>d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch d\u1ef1 ki\u1ebfn t\u1ea1i \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t<\/li>\n<li>kh\u1ea3 n\u0103ng c\u1eaft c\u1ee7a <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> ho\u1eb7c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ng\u01b0\u1ee3c d\u00f2ng<\/li>\n<li>b\u1ea5t k\u1ef3 y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 d\u1ef1 ph\u00f2ng ho\u1eb7c ph\u1ed1i h\u1ee3p n\u00e0o do nh\u00e0 s\u1ea3n xu\u1ea5t RCCB n\u00eau<\/li>\n<li>li\u1ec7u to\u00e0n b\u1ed9 c\u1ee5m b\u1ea3o v\u1ec7 c\u00f3 ph\u00f9 h\u1ee3p v\u1edbi m\u1ee9c s\u1ef1 c\u1ed1 hi\u1ec7n c\u00f3 hay kh\u00f4ng<\/li>\n<\/ul>\n<p>Khi \u0111\u00e1nh gi\u00e1 m\u1ed9t <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a>, nguy\u00ean t\u1eafc t\u01b0\u01a1ng t\u1ef1 v\u1eabn \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng: ch\u1ee9c n\u0103ng d\u00f2ng d\u01b0 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p v\u1edbi b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng, nh\u01b0ng kh\u1ea3 n\u0103ng c\u1eaft ng\u1eafn m\u1ea1ch c\u1ee7a thi\u1ebft b\u1ecb v\u1eabn ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi m\u1ee9c s\u1ef1 c\u1ed1 c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n<p>\u0110\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c k\u1ef9 s\u01b0 c\u00f3 kinh nghi\u1ec7m kh\u00f4ng d\u1eebng l\u1ea1i \u1edf vi\u1ec7c h\u1ecfi li\u1ec7u m\u1ed9t thi\u1ebft b\u1ecb c\u00f3 ph\u1ea3i l\u00e0 <code>30 mA Lo\u1ea1i A<\/code> hay <code>30 mA Lo\u1ea1i B<\/code>. H\u1ecd c\u0169ng h\u1ecfi li\u1ec7u s\u1ef1 k\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 c\u00f3 \u0111\u00fang v\u1edbi m\u1ee9c s\u1ef1 c\u1ed1 t\u1ea1i b\u1ea3ng \u0111\u00f3 hay kh\u00f4ng.<\/p>\n<h2>C\u00e1c nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 l\u1ef1a ch\u1ecdn RCCB: \u0110\u1ed9 nh\u1ea1y, Lo\u1ea1i v\u00e0 S\u1ed1 c\u1ef1c<\/h2>\n<h3>\u0110\u1ed9 nh\u1ea1y RCCB<\/h3>\n<p>C\u00e1c m\u1ee9c \u0111\u1ed9 nh\u1ea1y th\u00f4ng th\u01b0\u1eddng bao g\u1ed3m:<\/p>\n<ul>\n<li><code>30 mA<\/code> \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n<\/li>\n<li><code>30 mA<\/code> cho c\u00e1c \u1ee9ng d\u1ee5ng th\u01b0\u1ee3ng ngu\u1ed3n ho\u1eb7c h\u01b0\u1edbng \u0111\u1ebfn nguy c\u01a1 h\u1ecfa ho\u1ea1n t\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng<\/li>\n<li><code>100 mA<\/code> \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng ch\u00e1y \u1edf m\u1ee9c cao h\u01a1n, kh\u00f4ng b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt c\u00e1 nh\u00e2n<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c th\u1ea3o lu\u1eadn v\u1ec1 b\u1ea3o v\u1ec7 s\u1ef1 s\u1ed1ng, <code>30 mA<\/code> l\u00e0 gi\u00e1 tr\u1ecb quan tr\u1ecdng. N\u1ebfu b\u1ea1n mu\u1ed1n c\u00f3 logic \u0111\u1ecbnh c\u1ee1 chi ti\u1ebft, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/how-to-choose-the-right-rccb-sensitivity\/\">C\u00e1ch ch\u1ecdn \u0111\u1ed9 nh\u1ea1y RCCB ph\u00f9 h\u1ee3p<\/a>.<\/p>\n<h3>Lo\u1ea1i RCCB<\/h3>\n<p>Lo\u1ea1i thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 c\u00f3 vai tr\u00f2 quan tr\u1ecdng v\u00ec t\u1ea3i hi\u1ec7n \u0111\u1ea1i c\u00f3 th\u1ec3 t\u1ea1o ra c\u00e1c d\u1ea1ng s\u00f3ng d\u00f2ng r\u00f2 kh\u00e1c nhau.<\/p>\n<ul>\n<li><code>Lo\u1ea1i AC<\/code> ph\u00e1t hi\u1ec7n d\u00f2ng d\u01b0 xoay chi\u1ec1u h\u00ecnh sin<\/li>\n<li><code>Lo\u1ea1i A<\/code> ph\u00e1t hi\u1ec7n d\u00f2ng d\u01b0 xoay chi\u1ec1u v\u00e0 m\u1ed9t chi\u1ec1u xung<\/li>\n<li><code>Lo\u1ea1i B<\/code> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf nh\u1eefng n\u01a1i c\u00f3 th\u1ec3 x\u1ea3y ra d\u00f2ng d\u01b0 m\u1ed9t chi\u1ec1u tr\u01a1n<\/li>\n<\/ul>\n<p>\u0110\u1ed1i v\u1edbi t\u1ea3i d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i nh\u1eb9 hi\u1ec7n \u0111\u1ea1i, Lo\u1ea1i A th\u01b0\u1eddng l\u00e0 th\u1ea3o lu\u1eadn c\u01a1 b\u1ea3n ph\u00f9 h\u1ee3p h\u01a1n so v\u1edbi Lo\u1ea1i AC.<\/p>\n<h3>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf v\u1ec1 l\u1ef1a ch\u1ecdn lo\u1ea1i<\/h3>\n<p>\u0110\u00e2y l\u00e0 n\u01a1i l\u1ef1a ch\u1ecdn tr\u1edf n\u00ean \u00edt l\u00fd thuy\u1ebft h\u01a1n. Trong c\u00e1c d\u1ef1 \u00e1n th\u1ef1c t\u1ebf, lo\u1ea1i thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 ch\u00ednh x\u00e1c ph\u1ee5 thu\u1ed9c nhi\u1ec1u v\u00e0o t\u1ea3i \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i.<\/p>\n<ul>\n<li>\u0110\u1ed1i v\u1edbi m\u1ea1ch cu\u1ed1i c\u00f9ng ti\u00eau chu\u1ea9n d\u00e2n d\u1ee5ng c\u1ea5p ngu\u1ed3n cho \u1ed5 c\u1eafm, \u0111\u00e8n chi\u1ebfu s\u00e1ng, m\u00e1y gi\u1eb7t v\u00e0 m\u00e1y \u0111i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed d\u1ef1a tr\u00ean bi\u1ebfn t\u1ea7n, <code>Lo\u1ea1i A<\/code> th\u01b0\u1eddng l\u00e0 \u0111i\u1ec3m kh\u1edfi \u0111\u1ea7u th\u1ef1c t\u1ebf h\u01a1n v\u00ec nhi\u1ec1u thi\u1ebft b\u1ecb hi\u1ec7n \u0111\u1ea1i ch\u1ee9a c\u00e1c giai \u0111o\u1ea1n \u0111i\u1ec1u khi\u1ec3n v\u00e0 ch\u1ec9nh l\u01b0u \u0111i\u1ec7n t\u1eed.<\/li>\n<li>\u0110\u1ed1i v\u1edbi b\u1ed9 s\u1ea1c EV, giao di\u1ec7n bi\u1ebfn t\u1ea7n PV ho\u1eb7c thi\u1ebft b\u1ecb c\u00f4ng nghi\u1ec7p c\u00f3 b\u1ed9 chuy\u1ec3n \u0111\u1ed5i t\u1ea7n s\u1ed1 v\u00e0 \u0111i\u1ec7n t\u1eed c\u00f4ng su\u1ea5t ph\u1ee9c t\u1ea1p h\u01a1n, c\u00e2u h\u1ecfi v\u1ec1 d\u1ea1ng s\u00f3ng d\u00f2ng d\u01b0 tr\u1edf n\u00ean kh\u1eaft khe h\u01a1n. T\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf b\u1ed9 s\u1ea1c ho\u1eb7c \u1ed5 \u0111\u0129a, m\u1ed9t <code>Lo\u1ea1i B<\/code> thi\u1ebft b\u1ecb ho\u1eb7c m\u1ed9t s\u1ef1 s\u1eafp x\u1ebfp d\u1ef1a tr\u00ean Lo\u1ea1i A v\u1edbi kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 m\u1ed9t chi\u1ec1u b\u1ed5 sung \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p trong thi\u1ebft b\u1ecb, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u theo thi\u1ebft k\u1ebf \u1ee9ng d\u1ee5ng v\u00e0 c\u00e1c ti\u00eau chu\u1ea9n hi\u1ec7n h\u00e0nh.<\/li>\n<\/ul>\n<p>\u0110i\u1ec1u n\u00e0y \u0111\u1eb7c bi\u1ec7t quan tr\u1ecdng trong s\u1ea1c EV. Theo khu\u00f4n kh\u1ed5 IEC 60364-7-722, m\u1ed9t \u0111i\u1ec3m s\u1ea1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 \u1edf th\u01b0\u1ee3ng ngu\u1ed3n b\u1eb1ng m\u1ed9t <code>Lo\u1ea1i A<\/code> thi\u1ebft b\u1ecb n\u1ebfu EVSE \u0111\u00e3 cung c\u1ea5p <code>6 mA DC<\/code> ph\u00e1t hi\u1ec7n d\u00f2ng d\u01b0 th\u00f4ng qua ch\u1ee9c n\u0103ng RDC-DD tu\u00e2n th\u1ee7 IEC 62955. \u0110\u00f3 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed c\u00f3 \u00fd ngh\u0129a so v\u1edbi vi\u1ec7c ch\u1ec9 \u0111\u1ecbnh Lo\u1ea1i B \u1edf m\u1ecdi n\u01a1i. Nh\u01b0ng n\u1ebfu t\u00ednh n\u0103ng ph\u00e1t hi\u1ec7n DC 6 mA t\u00edch h\u1ee3p \u0111\u00f3 kh\u00f4ng c\u00f3 ho\u1eb7c n\u1ebfu t\u00e0i li\u1ec7u thi\u1ebft b\u1ecb y\u00eau c\u1ea7u m\u1ed9t s\u1ef1 s\u1eafp x\u1ebfp b\u1ea3o v\u1ec7 kh\u00e1c, th\u00ec chi\u1ebfn l\u01b0\u1ee3c thi\u1ebft b\u1ecb th\u01b0\u1ee3ng ngu\u1ed3n ph\u1ea3i thay \u0111\u1ed5i cho ph\u00f9 h\u1ee3p.<\/p>\n<p>Trong th\u1ef1c t\u1ebf, \u0111\u00e2y l\u00e0 l\u00fd do t\u1ea1i sao c\u00e1c k\u1ef9 s\u01b0 kh\u00f4ng n\u00ean ch\u1ecdn lo\u1ea1i RCCB ch\u1ec9 d\u1ef1a tr\u00ean gi\u00e1 c\u1ea3. M\u1ed9t thi\u1ebft b\u1ecb Lo\u1ea1i AC c\u01a1 b\u1ea3n c\u00f3 v\u1ebb ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c tr\u00ean gi\u1ea5y t\u1edd, nh\u01b0ng n\u00f3 c\u00f3 th\u1ec3 l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn sai l\u1ea7m cho m\u1ed9t m\u1ea1ch ph\u1ee5c v\u1ee5 t\u1ea3i \u0111i\u1ec7n t\u1eed hi\u1ec7n \u0111\u1ea1i. N\u1ebfu m\u1ea1ch bao g\u1ed3m s\u1ea1c EV, chuy\u1ec3n \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ho\u1eb7c \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1 ti\u00ean ti\u1ebfn, h\u00e3y lu\u00f4n x\u00e1c minh y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb so v\u1edbi h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t thi\u1ebft b\u1ecb v\u00e0 ti\u00eau chu\u1ea9n l\u1eafp \u0111\u1eb7t c\u00f3 li\u00ean quan.<\/p>\n<h3>C\u1ea5u h\u00ecnh c\u1ef1c<\/h3>\n<ul>\n<li><code>RCCB 2 c\u1ef1c<\/code> th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng m\u1ed9t pha<\/li>\n<li><code>RCCB 4 c\u1ef1c<\/code> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng ba pha c\u00f3 gi\u00e1m s\u00e1t trung t\u00ednh theo y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft k\u1ebf l\u1eafp \u0111\u1eb7t<\/li>\n<\/ul>\n<p>Ch\u1ecdn \u0111\u00fang s\u1ed1 l\u01b0\u1ee3ng c\u1ef1c r\u1ea5t quan tr\u1ecdng v\u00ec t\u1ea5t c\u1ea3 c\u00e1c d\u00e2y d\u1eabn mang d\u00f2ng \u0111i\u1ec7n \u0111\u01b0\u1ee3c gi\u00e1m s\u00e1t ph\u1ea3i \u0111i qua \u0111\u01b0\u1eddng d\u1eabn c\u1ea3m bi\u1ebfn d\u00f2ng d\u01b0.<\/p>\n<h2>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB v\u00e0 RCB<\/h2>\n<p>\u1ede nhi\u1ec1u th\u1ecb tr\u01b0\u1eddng, <code>RCB<\/code> \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t c\u00e1ch vi\u1ebft t\u1eaft l\u1ecfng l\u1ebbo cho m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0. Nh\u01b0ng v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, thu\u1eadt ng\u1eef n\u00e0y c\u00f3 th\u1ec3 r\u1ed9ng h\u01a1n v\u00e0 k\u00e9m ch\u00ednh x\u00e1c h\u01a1n <code>RCCB<\/code>.<\/p>\n<p>\u0110\u1ec3 mua v\u00e0 l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf:<\/p>\n<ul>\n<li><code>MCB<\/code> = ch\u1ec9 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/li>\n<li><code>RCB<\/code> hay <code>TI\u00caN<\/code> = h\u1ecd b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0<\/li>\n<li><code>RCCB<\/code> = thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u00edch h\u1ee3p<\/li>\n<li><code>RCBO<\/code> = b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 + qu\u00e1 d\u00f2ng trong m\u1ed9t thi\u1ebft b\u1ecb<\/li>\n<\/ul>\n<p>V\u00ec v\u1eady, n\u1ebfu ai \u0111\u00f3 h\u1ecfi v\u1ec1 <code>s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB v\u00e0 RCB<\/code>, c\u00e2u tr\u1ea3 l\u1eddi th\u1ef1c t\u1ebf l\u00e0:<\/p>\n<p><strong>MCB b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch; C\u00e1c thi\u1ebft b\u1ecb thu\u1ed9c h\u1ecd RCB b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c l\u1ed7i d\u00f2ng r\u00f2 v\u00e0 nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt.<\/strong><\/p>\n<p>\u0110\u1ec3 bi\u1ebft ph\u00e2n t\u00edch theo c\u1ea5p \u0111\u1ed9 thu\u1eadt ng\u1eef, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/rcb-full-form-residual-current-breaker\/\">D\u1ea1ng \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a RCB trong \u0111i\u1ec7n: B\u1ed9 ng\u1eaft d\u00f2ng d\u01b0<\/a> v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/rccb-full-form-understanding-residual-current-circuit-breakers\/\">RCCB Full Form: T\u00ecm hi\u1ec3u v\u1ec1 m\u00e1y c\u1eaft m\u1ea1ch d\u00f2ng \u0111i\u1ec7n d\u01b0<\/a>.<\/p>\n<h2>RCCB so v\u1edbi MCB so v\u1edbi RCBO<\/h2>\n<p>Khi m\u1ed9t d\u1ef1 \u00e1n v\u01b0\u1ee3t ra ngo\u00e0i nh\u1eadn th\u1ee9c c\u01a1 b\u1ea3n, nhi\u1ec1u k\u1ef9 s\u01b0 v\u00e0 ng\u01b0\u1eddi mua ng\u1eebng h\u1ecfi <code>RCCB so v\u1edbi MCB<\/code> v\u00e0 b\u1eaft \u0111\u1ea7u h\u1ecfi li\u1ec7u RCBO c\u00f3 ph\u1ea3i l\u00e0 ki\u1ebfn tr\u00fac t\u1ed1t h\u01a1n hay kh\u00f4ng.<\/p>\n<table style=\"border-collapse: collapse; width: 100%; text-align: left;\" border=\"1\">\n<thead>\n<tr>\n<th style=\"padding: 8px;\">Thi\u1ebft b\u1ecb<\/th>\n<th style=\"padding: 8px;\">B\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i<\/th>\n<th style=\"padding: 8px;\">B\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch<\/th>\n<th style=\"padding: 8px;\">B\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 \u0111\u1ea5t<\/th>\n<th style=\"padding: 8px;\">Tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng \u0111i\u1ec3n h\u00ecnh<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"padding: 8px;\">MCB<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">Kh\u00f4ng c\u00f3<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng m\u1ea1ch nh\u00e1nh ti\u00eau chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCCB<\/td>\n<td style=\"padding: 8px;\">Kh\u00f4ng c\u00f3<\/td>\n<td style=\"padding: 8px;\">Kh\u00f4ng c\u00f3<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 r\u00f2 r\u1ec9 \u0111\u01b0\u1ee3c chia s\u1ebb v\u1edbi MCB ri\u00eang bi\u1ec7t<\/td>\n<\/tr>\n<tr>\n<td style=\"padding: 8px;\">RCBO<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">Yes<\/td>\n<td style=\"padding: 8px;\">B\u1ea3o v\u1ec7 m\u1ea1ch ri\u00eang l\u1ebb v\u1edbi ch\u1ee9c n\u0103ng k\u1ebft h\u1ee3p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>N\u1ebfu kh\u00f4ng gian b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n, c\u00e1ch ly s\u1ef1 c\u1ed1 v\u00e0 t\u00ednh ch\u1ecdn l\u1ecdc tr\u00ean m\u1ed7i m\u1ea1ch l\u00e0 quan tr\u1ecdng, <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a> th\u01b0\u1eddng tr\u1edf th\u00e0nh c\u00e2u tr\u1ea3 l\u1eddi k\u1ef9 thu\u1eadt t\u1ed1t h\u01a1n.<\/p>\n<p>\u0110\u1ec3 so s\u00e1nh ki\u1ebfn tr\u00fac s\u00e2u h\u01a1n, h\u00e3y xem <a href=\"https:\/\/test.viox.com\/vi\/rcbo-vs-rccb-mcb-comparison-space-cost-selectivity\/\">RCBO so v\u1edbi RCCB + MCB: So s\u00e1nh v\u1ec1 kh\u00f4ng gian, chi ph\u00ed v\u00e0 t\u00ednh ch\u1ecdn l\u1ecdc<\/a>.<\/p>\n<h2>Nh\u1eefng sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi l\u1ef1a ch\u1ecdn gi\u1eefa RCCB v\u00e0 MCB<\/h2>\n<h3>1. Ch\u1ec9 s\u1eed d\u1ee5ng MCB khi c\u1ea7n b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt<\/h3>\n<p>\u0110\u00e2y l\u00e0 sai l\u1ea7m kh\u00e1i ni\u1ec7m ph\u1ed5 bi\u1ebfn nh\u1ea5t. B\u1ea3o v\u1ec7 ch\u1ec9 b\u1eb1ng MCB l\u00e0 kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7 trong c\u00e1c m\u1ea1ch \u1ea9m \u01b0\u1edbt, ngo\u00e0i tr\u1eddi ho\u1eb7c c\u00f3 \u0111\u1ed9 ti\u1ebfp x\u00fac cao, n\u01a1i d\u1ef1 ki\u1ebfn b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0.<\/p>\n<h3>2. Gi\u1ea3 \u0111\u1ecbnh RCCB thay th\u1ebf b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/h3>\n<p>RCCB kh\u00f4ng thay th\u1ebf ch\u1ee9c n\u0103ng qu\u00e1 d\u00f2ng c\u1ee7a MCB. N\u1ebfu b\u1ea1n ch\u1ec9 l\u1eafp \u0111\u1eb7t RCCB m\u00e0 kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng th\u00edch h\u1ee3p \u1edf th\u01b0\u1ee3ng ngu\u1ed3n ho\u1eb7c ph\u1ed1i h\u1ee3p, th\u00ec vi\u1ec7c l\u1eafp \u0111\u1eb7t l\u00e0 kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<h3>3. Ch\u1ecdn sai \u0111\u1ed9 nh\u1ea1y RCCB<\/h3>\n<p>Ng\u01b0\u1ee1ng d\u00f2ng d\u01b0 qu\u00e1 cao c\u00f3 th\u1ec3 kh\u00f4ng cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n d\u1ef1 ki\u1ebfn. Qu\u00e1 th\u1ea5p c\u00f3 th\u1ec3 g\u00e2y ra s\u1ef1 c\u1ed1 n\u1ebfu \u1ee9ng d\u1ee5ng kh\u00f4ng ph\u00f9 h\u1ee3p.<\/p>\n<h3>4. B\u1ecf qua lo\u1ea1i thi\u1ebft b\u1ecb<\/h3>\n<p>T\u1ea3i c\u00f3 chuy\u1ec3n \u0111\u1ed5i ngu\u1ed3n \u0111i\u1ec7n t\u1eed c\u00f3 th\u1ec3 thay \u0111\u1ed5i lo\u1ea1i thi\u1ebft b\u1ecb d\u00f2ng d\u01b0 c\u1ea7n thi\u1ebft. \u0110\u00e2y l\u00e0 m\u1ed9t l\u00fd do c\u0169 h\u01a1n <code>Lo\u1ea1i AC<\/code> c\u00e1c gi\u1ea3 \u0111\u1ecbnh kh\u00f4ng c\u00f2n ph\u00f9 h\u1ee3p v\u1edbi m\u1ecdi t\u1ea3i hi\u1ec7n \u0111\u1ea1i.<\/p>\n<h3>5. B\u1ecf qua ph\u1ed1i h\u1ee3p ng\u1eafn m\u1ea1ch v\u00e0 b\u1ea3o v\u1ec7 d\u1ef1 ph\u00f2ng<\/h3>\n<p>Ch\u1ec9 ch\u1ecdn \u0111\u00fang ch\u1ee9c n\u0103ng r\u00f2 r\u1ec9 l\u00e0 ch\u01b0a \u0111\u1ee7. S\u1ef1 s\u1eafp x\u1ebfp b\u1ea3o v\u1ec7 c\u0169ng ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 c\u00f3 s\u1eb5n t\u1ea1i \u0111i\u1ec3m \u0111\u00f3 trong h\u1ec7 th\u1ed1ng.<\/p>\n<h3>6. S\u1eed d\u1ee5ng l\u1eabn l\u1ed9n thu\u1eadt ng\u1eef m\u00e0 kh\u00f4ng l\u00e0m r\u00f5 ch\u1ee9c n\u0103ng c\u1ee7a thi\u1ebft b\u1ecb<\/h3>\n<p>Ng\u01b0\u1eddi d\u00f9ng th\u01b0\u1eddng n\u00f3i <code>RCB<\/code>, <code>TI\u00caN<\/code>, V\u00e0 <code>RCCB<\/code> thay th\u1ebf cho nhau. \u0110i\u1ec1u \u0111\u00f3 th\u01b0\u1eddng th\u1ea5y trong giao ti\u1ebfp th\u00f4ng th\u01b0\u1eddng, nh\u01b0ng \u0111\u1ed1i v\u1edbi \u0111\u1eb7c t\u1ea3 k\u1ef9 thu\u1eadt v\u00e0 mua s\u1eafm, lo\u1ea1i thi\u1ebft b\u1ecb ch\u00ednh x\u00e1c m\u1edbi quan tr\u1ecdng.<\/p>\n<h2>Chi\u1ebfn l\u01b0\u1ee3c B\u1ea3o v\u1ec7 Khuy\u1ebfn ngh\u1ecb<\/h2>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n m\u1ed9t khuy\u1ebfn ngh\u1ecb ng\u1eafn g\u1ecdn nh\u1ea5t v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, th\u00ec \u0111\u00e2y l\u00e0:<\/p>\n<ul>\n<li>s\u1eed d\u1ee5ng <a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB<\/a> \u0111\u1ec3 b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch<\/li>\n<li>s\u1eed d\u1ee5ng <a href=\"https:\/\/test.viox.com\/vi\/rccb\/\">RCCB<\/a> \u1edf nh\u1eefng n\u01a1i y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 \u0111\u1ea5t v\u00e0 b\u1ea3o v\u1ec7 c\u00e1 nh\u00e2n<\/li>\n<li>s\u1eed d\u1ee5ng <a href=\"https:\/\/test.viox.com\/vi\/rcbo\/\">RCBO<\/a> \u1edf nh\u1eefng n\u01a1i b\u1ea1n mu\u1ed1n c\u1ea3 hai trong m\u1ed9t thi\u1ebft b\u1ecb<\/li>\n<\/ul>\n<p>\u0110\u00f3 l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi th\u1ef1c t\u1ebf \u0111\u1eb1ng sau h\u1ea7u h\u1ebft c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn l\u1ef1a ch\u1ecdn t\u1ea1i hi\u1ec7n tr\u01b0\u1eddng v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y.<\/p>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa RCCB v\u00e0 MCB l\u00e0 g\u00ec?<\/h3>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh l\u00e0 lo\u1ea1i l\u1ed7i m\u00e0 ch\u00fang ph\u00e1t hi\u1ec7n. RCCB ph\u00e1t hi\u1ec7n s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng d\u00f2ng r\u00f2 xu\u1ed1ng \u0111\u1ea5t, trong khi MCB ph\u00e1t hi\u1ec7n qu\u00e1 t\u1ea3i v\u00e0 d\u00f2ng ng\u1eafn m\u1ea1ch.<\/p>\n<h3>Ch\u1ee9c n\u0103ng c\u1ee7a RCCB l\u00e0 g\u00ec?<\/h3>\n<p>Ch\u1ee9c n\u0103ng c\u1ed1t l\u00f5i c\u1ee7a RCCB l\u00e0 ph\u00e1t hi\u1ec7n d\u00f2ng \u0111i\u1ec7n r\u00f2 r\u1ec9 t\u1eeb \u0111\u01b0\u1eddng d\u1eabn m\u1ea1ch d\u1ef1 ki\u1ebfn xu\u1ed1ng \u0111\u1ea5t v\u00e0 ng\u1eaft m\u1ea1ch tr\u01b0\u1edbc khi s\u1ef1 r\u00f2 r\u1ec9 \u0111\u00f3 tr\u1edf th\u00e0nh nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt nghi\u00eam tr\u1ecdng ho\u1eb7c h\u1ecfa ho\u1ea1n.<\/p>\n<h3>RCCB c\u00f3 th\u1ec3 thay th\u1ebf MCB kh\u00f4ng?<\/h3>\n<p>B\u1ea3n th\u00e2n n\u00f3 th\u00ec kh\u00f4ng. RCCB kh\u00f4ng cung c\u1ea5p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng ti\u00eau chu\u1ea9n. Trong h\u1ea7u h\u1ebft c\u00e1c c\u00e0i \u0111\u1eb7t, RCCB ph\u1ea3i ho\u1ea1t \u0111\u1ed9ng v\u1edbi MCB, ho\u1eb7c b\u1ea1n n\u00ean s\u1eed d\u1ee5ng RCBO.<\/p>\n<h3>RCCB c\u00f3 t\u1ed1t h\u01a1n MCB kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng mang t\u00ednh t\u1ed5ng qu\u00e1t. RCCB t\u1ed1t h\u01a1n cho vi\u1ec7c b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9 v\u00e0 \u0111i\u1ec7n gi\u1eadt. MCB t\u1ed1t h\u01a1n cho vi\u1ec7c b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch. Ch\u00fang gi\u1ea3i quy\u1ebft c\u00e1c v\u1ea5n \u0111\u1ec1 kh\u00e1c nhau.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa MCB v\u00e0 RCB l\u00e0 g\u00ec?<\/h3>\n<p>MCB b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c s\u1ef1 c\u1ed1 qu\u00e1 d\u00f2ng. C\u00e1c thi\u1ebft b\u1ecb lo\u1ea1i RCB b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i d\u00f2ng d\u01b0 ho\u1eb7c c\u00e1c s\u1ef1 c\u1ed1 r\u00f2 r\u1ec9. Trong th\u1ef1c t\u1ebf, nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng c\u00f3 \u00fd ch\u1ec9 RCCB khi h\u1ecd n\u00f3i RCB.<\/p>\n<h3>T\u1ea1i sao RCCB c\u1ee7a t\u00f4i b\u1ecb ng\u1eaft m\u00e0 MCB th\u00ec kh\u00f4ng?<\/h3>\n<p>\u0110i\u1ec1u \u0111\u00f3 th\u01b0\u1eddng c\u00f3 ngh\u0129a l\u00e0 s\u1ef1 c\u1ed1 l\u00e0 r\u00f2 r\u1ec9 xu\u1ed1ng \u0111\u1ea5t h\u01a1n l\u00e0 qu\u00e1 t\u1ea3i ho\u1eb7c ng\u1eafn m\u1ea1ch. RCCB \u0111ang ph\u00e1t hi\u1ec7n s\u1ef1 m\u1ea5t c\u00e2n b\u1eb1ng, trong khi MCB kh\u00f4ng ph\u00e1t hi\u1ec7n \u0111\u1ee7 d\u00f2ng \u0111i\u1ec7n qu\u00e1 m\u1ee9c \u0111\u1ec3 ng\u1eaft.<\/p>\n<h3>T\u00f4i n\u00ean s\u1eed d\u1ee5ng RCCB hay RCBO cho m\u1ed9t m\u1ea1ch \u0111i\u1ec7n cu\u1ed1i c\u00f9ng?<\/h3>\n<p>N\u1ebfu b\u1ea1n mu\u1ed1n k\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 \u0111i\u1ec7n tr\u00ean m\u1ed9t m\u1ea1ch duy nh\u1ea5t, RCBO th\u01b0\u1eddng l\u00e0 gi\u1ea3i ph\u00e1p g\u1ecdn g\u00e0ng h\u01a1n. N\u1ebfu thi\u1ebft k\u1ebf s\u1eed d\u1ee5ng b\u1ea3o v\u1ec7 d\u00f2ng d\u01b0 chung v\u1edbi c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng nh\u00e1nh ri\u00eang bi\u1ec7t, th\u00ec RCCB + MCB c\u00f3 th\u1ec3 v\u1eabn ph\u00f9 h\u1ee3p.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>N\u1ebfu c\u00e2u h\u1ecfi c\u1ee7a b\u1ea1n l\u00e0 <code>t\u1ea1i sao s\u1eed d\u1ee5ng RCCB thay v\u00ec MCB<\/code>, c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt l\u00e0:<\/p>\n<p><strong>S\u1eed d\u1ee5ng RCCB \u1edf nh\u1eefng n\u01a1i b\u1ea1n c\u1ea7n b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt v\u00e0 r\u00f2 r\u1ec9 \u0111\u1ea5t. S\u1eed d\u1ee5ng MCB \u1edf nh\u1eefng n\u01a1i b\u1ea1n c\u1ea7n b\u1ea3o v\u1ec7 ch\u1ed1ng qu\u00e1 t\u1ea3i v\u00e0 ng\u1eafn m\u1ea1ch. Trong h\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng th\u1ef1c t\u1ebf, h\u00e3y s\u1eed d\u1ee5ng c\u1ea3 hai c\u00f9ng nhau ho\u1eb7c s\u1eed d\u1ee5ng RCBO khi b\u1ea1n mu\u1ed1n c\u1ea3 hai ch\u1ee9c n\u0103ng trong m\u1ed9t thi\u1ebft b\u1ecb.<\/strong><\/p>\n<p>\u0110\u00f3 c\u0169ng l\u00e0 c\u00e1ch r\u00f5 r\u00e0ng nh\u1ea5t \u0111\u1ec3 hi\u1ec3u:<\/p>\n<ul>\n<li><code>rccb so v\u1edbi mcb<\/code><\/li>\n<li><code>s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa rccb v\u00e0 mcb<\/code><\/li>\n<li><code>ch\u1ee9c n\u0103ng c\u1ee7a rccb<\/code><\/li>\n<li><code>c\u1ea7u dao rccb<\/code><\/li>\n<li><code>s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa mcb v\u00e0 rcb<\/code><\/li>\n<\/ul>\n<p>Nh\u1eefng \u0111i\u1ec3m kh\u00e1c bi\u1ec7t \u0111\u00f3 l\u00e0 \u0111i\u1ec1u quan tr\u1ecdng trong c\u00f4ng vi\u1ec7c l\u1ef1a ch\u1ecdn th\u1ef1c t\u1ebf, b\u1edfi v\u00ec b\u1ea3o v\u1ec7 ch\u1ed1ng r\u00f2 r\u1ec9, b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 ph\u1ed1i h\u1ee3p m\u1ee9c s\u1ef1 c\u1ed1 \u0111\u1ec1u ph\u1ea3i ch\u00ednh x\u00e1c c\u00f9ng m\u1ed9t l\u00fac.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5528.53px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 5528.53px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer You do not use an RCCB instead of an MCB for every purpose. You use an RCCB when you need electric shock and earth-leakage protection, and you use an MCB when you need overload and short-circuit protection. In most real installations, the correct answer is not RCCB or MCB, but RCCB + MCB [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18938,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-18935","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18935","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/comments?post=18935"}],"version-history":[{"count":1,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18935\/revisions"}],"predecessor-version":[{"id":23286,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18935\/revisions\/23286"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/18938"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=18935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=18935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=18935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}