{"id":17692,"date":"2025-06-30T14:48:12","date_gmt":"2025-06-30T06:48:12","guid":{"rendered":"https:\/\/viox.com\/?p=17692"},"modified":"2026-01-03T10:38:56","modified_gmt":"2026-01-03T02:38:56","slug":"what-is-a-dc-circuit-breaker","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/what-is-a-dc-circuit-breaker\/","title":{"rendered":"B\u1ed9 ng\u1eaft m\u1ea1ch DC l\u00e0 g\u00ec"},"content":{"rendered":"<div class=\"product-intro\">\n<p><strong>\u26a0\ufe0f C\u1ea2NH B\u00c1O QUAN TR\u1eccNG:<\/strong> S\u1eed d\u1ee5ng c\u1ea7u dao AC trong \u1ee9ng d\u1ee5ng DC c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb nghi\u00eam tr\u1ecdng, ch\u00e1y n\u1ed5 \u0111i\u1ec7n v\u00e0 c\u00e1c nguy c\u01a1 an to\u00e0n nghi\u00eam tr\u1ecdng. S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n trong h\u00e0nh vi h\u1ed3 quang gi\u1eefa h\u1ec7 th\u1ed1ng AC v\u00e0 DC l\u00e0m cho vi\u1ec7c thay th\u1ebf n\u00e0y c\u1ef1c k\u1ef3 nguy hi\u1ec3m v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng \u0111e d\u1ecda t\u00ednh m\u1ea1ng.<\/p>\n<p>M\u1ed9t <strong>C\u1ea7u dao DC<\/strong> l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 chuy\u00ean d\u1ee5ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng ng\u1eaft d\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u (DC) khi x\u1ea3y ra c\u00e1c \u0111i\u1ec1u ki\u1ec7n nguy hi\u1ec3m nh\u01b0 qu\u00e1 d\u00f2ng, ng\u1eafn m\u1ea1ch ho\u1eb7c s\u1ef1 c\u1ed1 \u0111i\u1ec7n. Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c c\u1ea7u dao AC ti\u00eau chu\u1ea9n, c\u1ea7u dao DC k\u1ebft h\u1ee3p c\u00f4ng ngh\u1ec7 d\u1eadp h\u1ed3 quang ti\u00ean ti\u1ebfn \u0111\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c m\u1ed9t c\u00e1ch an to\u00e0n\u2014m\u1ed9t th\u00e1ch th\u1ee9c khi\u1ebfn vi\u1ec7c b\u1ea3o v\u1ec7 DC v\u1ec1 c\u01a1 b\u1ea3n ph\u1ee9c t\u1ea1p h\u01a1n b\u1ea3o v\u1ec7 AC.<\/p>\n<p>C\u00e1c thi\u1ebft b\u1ecb an to\u00e0n thi\u1ebft y\u1ebfu n\u00e0y \u0111\u00f3ng vai tr\u00f2 l\u00e0 bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 ch\u00ednh trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n DC, b\u1ea3o v\u1ec7 c\u00e1c h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi, h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng pin, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ea1c xe \u0111i\u1ec7n, thi\u1ebft b\u1ecb vi\u1ec5n th\u00f4ng v\u00e0 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n h\u00e0ng h\u1ea3i.<\/p>\n<h2>V\u1eadt l\u00fd \u0111\u1eb1ng sau c\u1ea7u dao DC: T\u1ea1i sao c\u1ea7u dao AC kh\u00f4ng th\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng DC<\/h2>\n<h3>Hi\u1ec3u th\u00e1ch th\u1ee9c \u0111i\u1ec3m c\u1eaft kh\u00f4ng<\/h3>\n<p>S\u1ef1 kh\u00e1c bi\u1ec7t quan tr\u1ecdng gi\u1eefa b\u1ea3o v\u1ec7 m\u1ea1ch AC v\u00e0 DC n\u1eb1m \u1edf <strong>\u0111i\u1ec3m c\u1eaft kh\u00f4ng<\/strong>\u2014th\u1eddi \u0111i\u1ec3m \u0111i\u1ec7n \u00e1p d\u00f2ng \u0111i\u1ec7n xoay chi\u1ec1u gi\u1ea3m t\u1ef1 nhi\u00ean v\u1ec1 kh\u00f4ng volt.<\/p>\n<p>Trong h\u1ec7 th\u1ed1ng AC, d\u00f2ng \u0111i\u1ec7n dao \u0111\u1ed9ng qua \u0111i\u1ec7n \u00e1p kh\u00f4ng 100-120 l\u1ea7n m\u1ed7i gi\u00e2y (t\u00f9y thu\u1ed9c v\u00e0o t\u1ea7n s\u1ed1 50Hz ho\u1eb7c 60Hz). \u0110i\u1ec3m c\u1eaft kh\u00f4ng t\u1ef1 nhi\u00ean n\u00e0y t\u1ea1o ra c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ed1i \u01b0u \u0111\u1ec3 d\u1eadp t\u1eaft h\u1ed3 quang. Khi m\u1ed9t c\u1ea7u dao AC m\u1edf c\u00e1c ti\u1ebfp \u0111i\u1ec3m c\u1ee7a n\u00f3, h\u1ed3 quang s\u1ebd t\u1ef1 nhi\u00ean t\u1eaft t\u1ea1i \u0111i\u1ec3m c\u1eaft kh\u00f4ng ti\u1ebfp theo.<\/p>\n<p><strong>H\u1ec7 th\u1ed1ng DC kh\u00f4ng c\u00f3 \u0111i\u1ec3m c\u1eaft kh\u00f4ng.<\/strong> D\u00f2ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u ch\u1ea3y li\u00ean t\u1ee5c \u1edf \u0111i\u1ec7n \u00e1p kh\u00f4ng \u0111\u1ed5i, t\u1ea1o ra m\u1ed9t h\u1ed3 quang \u0111i\u1ec7n duy tr\u00ec li\u00ean t\u1ee5c, kh\u00f4ng t\u1ef1 d\u1eadp t\u1eaft. S\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n n\u00e0y l\u00e0m cho vi\u1ec7c ng\u1eaft h\u1ed3 quang DC tr\u1edf n\u00ean kh\u00f3 kh\u0103n v\u00e0 nguy hi\u1ec3m h\u01a1n theo c\u1ea5p s\u1ed1 nh\u00e2n.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border: 1px solid #ddd;\" src=\"https:\/\/img.viox.com\/AC-vs-DC-waveform-comparison-showing-zero-crossing-points-for-circuit-breaker-arc-extinction.webp\" alt=\"AC vs DC waveform comparison showing zero-crossing points for circuit breaker arc extinction\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px; font-size: 0.9em;\">Vi\u1ec7c kh\u00f4ng c\u00f3 \u0111i\u1ec3m c\u1eaft kh\u00f4ng trong h\u1ec7 th\u1ed1ng DC \u0111\u00f2i h\u1ecfi c\u00f4ng ngh\u1ec7 d\u1eadp h\u1ed3 quang chuy\u00ean d\u1ee5ng trong c\u1ea7u dao DC.<\/figcaption><\/figure>\n<h2>So s\u00e1nh quan tr\u1ecdng gi\u1eefa c\u1ea7u dao AC v\u00e0 DC<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f5f5f5;\">\n<th>N\u0103ng<\/th>\n<th>C\u1ea7u dao AC (MCB)<\/th>\n<th>C\u1ea7u dao DC (DC MCB)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Arc Tuy\u1ec7t Ch\u1ee7ng<\/strong><\/td>\n<td>T\u1ef1 nhi\u00ean t\u1ea1i \u0111i\u1ec3m c\u1eaft kh\u00f4ng (m\u1ed7i 8-10ms)<\/td>\n<td>Y\u00eau c\u1ea7u th\u1ed5i t\u1eeb c\u01b0\u1ee1ng b\u1ee9c<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u1eaft kh\u00f4ng<\/strong><\/td>\n<td>100-120 l\u1ea7n m\u1ed7i gi\u00e2y<\/td>\n<td>Kh\u00f4ng bao gi\u1edd x\u1ea3y ra<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u1ed9 nh\u1ea1y ph\u00e2n c\u1ef1c<\/strong><\/td>\n<td>Kh\u00f4ng y\u00eau c\u1ea7u ph\u00e2n c\u1ef1c<\/td>\n<td>Th\u01b0\u1eddng ph\u00e2n c\u1ef1c (h\u01b0\u1edbng +\/- quan tr\u1ecdng)<\/td>\n<\/tr>\n<tr>\n<td><strong>Thi\u1ebft k\u1ebf m\u00e1ng d\u1eadp h\u1ed3 quang<\/strong><\/td>\n<td>C\u1ea5u h\u00ecnh l\u01b0\u1edbi ti\u00eau chu\u1ea9n<\/td>\n<td>T\u0103ng c\u01b0\u1eddng v\u1edbi cu\u1ed9n d\u00e2y th\u1ed5i t\u1eeb<\/td>\n<\/tr>\n<tr>\n<td><strong>Kh\u1ea3 n\u0103ng ng\u1eaft<\/strong><\/td>\n<td>\u0110\u00e1nh gi\u00e1 th\u1ea5p h\u01a1n l\u00e0 \u0111\u1ee7<\/td>\n<td>Y\u00eau c\u1ea7u \u0111\u00e1nh gi\u00e1 cao h\u01a1n cho c\u00f9ng d\u00f2ng \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/strong><\/td>\n<td>Th\u01b0\u1eddng l\u00e0 230-400V AC<\/td>\n<td>12V \u0111\u1ebfn 1500V DC<\/td>\n<\/tr>\n<tr>\n<td><strong>K\u00edch c\u1ee1<\/strong><\/td>\n<td>Nh\u1ecf h\u01a1n cho \u0111\u00e1nh gi\u00e1 t\u01b0\u01a1ng \u0111\u01b0\u01a1ng<\/td>\n<td>L\u1edbn h\u01a1n 20-30% do d\u1eadp h\u1ed3 quang<\/td>\n<\/tr>\n<tr>\n<td><strong>Chi ph\u00ed<\/strong><\/td>\n<td>Th\u1ea5p h\u01a1n<\/td>\n<td>Cao h\u01a1n 30-50%<\/td>\n<\/tr>\n<tr>\n<td><strong>Ch\u1ebf \u0110\u1ed9 H\u1ecfng H\u00f3c<\/strong><\/td>\n<td>L\u1ed7i chuy\u1ebfn \u0111i an to\u00e0n<\/td>\n<td>Nguy c\u01a1 h\u1ecfa ho\u1ea1n n\u1ebfu \u0111\u00e1nh gi\u00e1 kh\u00f4ng ch\u00ednh x\u00e1c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>L\u01b0u \u00fd k\u1ef9 thu\u1eadt:<\/strong> Kh\u00f4ng bao gi\u1edd thay th\u1ebf m\u1ed9t c\u1ea7u dao AC \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho 250V AC trong m\u1ed9t \u1ee9ng d\u1ee5ng DC, ngay c\u1ea3 \u1edf \u0111i\u1ec7n \u00e1p DC th\u1ea5p h\u01a1n. M\u1ed9t c\u1ea7u dao AC 250V c\u00f3 th\u1ec3 h\u1ecfng h\u00f3c nghi\u00eam tr\u1ecdng ch\u1ec9 \u1edf 48V DC do kh\u1ea3 n\u0103ng d\u1eadp h\u1ed3 quang kh\u00f4ng \u0111\u1ee7.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border: 1px solid #ddd;\" src=\"https:\/\/img.viox.com\/VIOX-DC-circuit-breakers-installed-in-solar-photovoltaic-system-combiner-box.webp\" alt=\"VIOX DC circuit breakers installed in solar photovoltaic system combiner box\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px; font-size: 0.9em;\">VIOX DC <a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">b\u1ed9 ng\u1eaft m\u1ea1ch<\/a> cung c\u1ea5p b\u1ea3o v\u1ec7 \u0111\u00e1ng tin c\u1eady trong m\u1ed9t h\u1ec7 th\u1ed1ng l\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i, \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cho ho\u1ea1t \u0111\u1ed9ng 1000V DC.<\/figcaption><\/figure>\n<h2>Gi\u1ea3i ph\u1eabu b\u00ean trong: C\u1ea7u dao DC \u0111\u1ea1t \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng d\u1eadp h\u1ed3 quang nh\u01b0 th\u1ebf n\u00e0o<\/h2>\n<h3>C\u00e1c th\u00e0nh ph\u1ea7n quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 DC<\/h3>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border: 1px solid #ddd;\" src=\"https:\/\/img.viox.com\/Cutaway-diagram-of-DC-circuit-breaker-showing-arc-chute-and-magnetic-blowout-coil-components.webp\" alt=\"Cutaway diagram of DC circuit breaker showing arc chute and magnetic blowout coil components\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px; font-size: 0.9em;\">Gi\u1ea3i ph\u1eabu b\u00ean trong c\u1ee7a m\u1ed9t c\u1ea7u dao VIOX DC l\u00e0m n\u1ed5i b\u1eadt c\u00e1c th\u00e0nh ph\u1ea7n d\u1eadp h\u1ed3 quang chuy\u00ean d\u1ee5ng kh\u00f4ng c\u00f3 trong c\u1ea7u dao AC.<\/figcaption><\/figure>\n<h3>Nh\u1eefng <a href=\"https:\/\/test.viox.com\/vi\/what-is-an-arc-in-a-circuit-breaker\/\">\u1ed0ng d\u1eadp h\u1ed3 quang<\/a>: Tr\u00e1i tim c\u1ee7a b\u1ea3o v\u1ec7 DC<\/h3>\n<p>Nh\u1eefng <strong>\u1ed1ng d\u1eadp h\u1ed3 quang<\/strong> \u0111\u1ea1i di\u1ec7n cho th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 ph\u00e2n bi\u1ec7t c\u1ea7u dao DC v\u1edbi c\u1ea7u dao AC. C\u1ee5m n\u00e0y bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>T\u1ea5m chia:<\/strong> Nhi\u1ec1u t\u1ea5m kim lo\u1ea1i \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp n\u1ed1i ti\u1ebfp \u0111\u1ec3 chia h\u1ed3 quang th\u00e0nh c\u00e1c \u0111o\u1ea1n nh\u1ecf h\u01a1n<\/li>\n<li><strong>Ng\u01b0\u1eddi ch\u1ea1y v\u00f2ng cung:<\/strong> \u0110\u01b0\u1eddng ray b\u1eb1ng \u0111\u1ed3ng ho\u1eb7c th\u00e9p d\u1eabn h\u1ed3 quang l\u00ean tr\u00ean v\u00e0o c\u00e1c t\u1ea5m chia<\/li>\n<li><strong>Bu\u1ed3ng l\u00e0m m\u00e1t:<\/strong> Khu v\u1ef1c ng\u0103n ch\u1eb7n m\u1edf r\u1ed9ng gi\u00fap l\u00e0m m\u00e1t nhanh ch\u00f3ng c\u00e1c kh\u00ed h\u1ed3 quang<\/li>\n<\/ul>\n<h3>Cu\u1ed9n d\u00e2y th\u1ed5i t\u1eeb: Bu\u1ed9c d\u1eadp t\u1eaft h\u1ed3 quang<\/h3>\n<p><strong>Cu\u1ed9n d\u00e2y th\u1ed5i t\u1eeb<\/strong> t\u1ea1o ra c\u00e1c t\u1eeb tr\u01b0\u1eddng m\u1ea1nh m\u1ebd \u0111\u1ea9y v\u1eadt l\u00fd h\u1ed3 quang \u0111i\u1ec7n l\u00ean tr\u00ean v\u00e0o \u1ed1ng d\u1eadp h\u1ed3 quang. S\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa d\u00f2ng \u0111i\u1ec7n c\u1ee7a h\u1ed3 quang v\u00e0 t\u1eeb tr\u01b0\u1eddng t\u1ea1o ra m\u1ed9t l\u1ef1c Lorentz:<\/p>\n<ol>\n<li>K\u00e9o d\u00e0i chi\u1ec1u d\u00e0i h\u1ed3 quang (t\u0103ng \u0111i\u1ec7n tr\u1edf)<\/li>\n<li>\u0110\u1ea9y h\u1ed3 quang v\u00e0o c\u00e1c t\u1ea5m chia (chia v\u00e0 l\u00e0m m\u00e1t)<\/li>\n<li>\u00c9p kh\u00ed h\u1ed3 quang v\u00e0o bu\u1ed3ng l\u00e0m m\u00e1t<\/li>\n<li>\u0110\u1ea1t \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng d\u1eadp t\u1eaft h\u1ed3 quang th\u00f4ng qua ti\u00eau t\u00e1n n\u0103ng l\u01b0\u1ee3ng<\/li>\n<\/ol>\n<p>Vi\u1ec7c d\u1eadp h\u1ed3 quang c\u01b0\u1ee1ng b\u1ee9c n\u00e0y thay th\u1ebf c\u01a1 ch\u1ebf c\u1eaft kh\u00f4ng t\u1ef1 nhi\u00ean kh\u00f4ng c\u00f3 trong h\u1ec7 th\u1ed1ng DC.<\/p>\n<h2>An to\u00e0n quan tr\u1ecdng: Ph\u00e2n c\u1ef1c v\u00e0 \u0111\u1ea5u d\u00e2y c\u1ee7a c\u1ea7u dao DC<\/h2>\n<h3>C\u1ea7u dao DC ph\u00e2n c\u1ef1c so v\u1edbi kh\u00f4ng ph\u00e2n c\u1ef1c<\/h3>\n<p><strong>C\u1ea7u dao DC ph\u00e2n c\u1ef1c<\/strong> ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ea5u d\u00e2y v\u1edbi \u0111\u00fang c\u1ef1c \u0111\u1ec3 ho\u1ea1t \u0111\u1ed9ng an to\u00e0n. C\u01a1 ch\u1ebf d\u1eadp h\u1ed3 quang ph\u1ee5 thu\u1ed9c v\u00e0o h\u01b0\u1edbng d\u00f2ng \u0111i\u1ec7n qua cu\u1ed9n d\u00e2y th\u1ed5i t\u1eeb.<\/p>\n<p><strong>\u26a0\ufe0f C\u1ea2NH B\u00c1O:<\/strong> \u0110\u1ea5u d\u00e2y ng\u01b0\u1ee3c c\u1ef1c trong c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch DC ph\u00e2n c\u1ef1c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn:<\/p>\n<ul>\n<li>Tri\u1ec7t ti\u00eau h\u1ed3 quang kh\u00f4ng th\u00e0nh c\u00f4ng<\/li>\n<li>H\u00e0n ti\u1ebfp \u0111i\u1ec3m<\/li>\n<li>Ch\u1ea1y nhi\u1ec7t (Thermal runaway)<\/li>\n<li>Nguy c\u01a1 h\u1ecfa ho\u1ea1n<\/li>\n<\/ul>\n<p><strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC kh\u00f4ng ph\u00e2n c\u1ef1c<\/strong> (nh\u01b0 d\u00f2ng VIOX advanced) ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c b\u1ea5t k\u1ec3 h\u01b0\u1edbng ph\u00e2n c\u1ef1c, mang l\u1ea1i s\u1ef1 an to\u00e0n v\u00e0 linh ho\u1ea1t c\u00e0i \u0111\u1eb7t n\u00e2ng cao.<\/p>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border: 1px solid #ddd;\" src=\"https:\/\/img.viox.com\/Correct-and-incorrect-wiring-diagrams-for-polarized-DC-circuit-breaker-installation.webp\" alt=\"Correct and incorrect wiring diagrams for polarized DC circuit breaker installation\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px; font-size: 0.9em;\">\u0110\u1ea5u d\u00e2y \u0111\u00fang c\u1ef1c l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n cho b\u1ed9 ng\u1eaft m\u1ea1ch DC. B\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng ph\u00e2n c\u1ef1c VIOX lo\u1ea1i b\u1ecf r\u1ee7i ro c\u00e0i \u0111\u1eb7t n\u00e0y.<\/figcaption><\/figure>\n<h3>Danh s\u00e1ch ki\u1ec3m tra an to\u00e0n khi l\u1eafp \u0111\u1eb7t<\/h3>\n<ul>\n<li>X\u00e1c minh \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c DC c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a c\u1ee7a h\u1ec7 th\u1ed1ng<\/li>\n<li>X\u00e1c nh\u1eadn \u0111\u00fang h\u01b0\u1edbng ph\u00e2n c\u1ef1c (ki\u1ec3m tra d\u1ea5u + v\u00e0 \u2013)<\/li>\n<li>\u0110\u1ea3m b\u1ea3o ti\u1ebft di\u1ec7n d\u00e2y \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u v\u1ec1 d\u00f2ng \u0111i\u1ec7n c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li>X\u00e1c minh kh\u1ea3 n\u0103ng c\u1eaft c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 d\u00f2ng ng\u1eafn m\u1ea1ch \u0111\u00e3 t\u00ednh to\u00e1n<\/li>\n<li>L\u1eafp \u0111\u1eb7t \u1edf n\u01a1i th\u00f4ng gi\u00f3 t\u1ed1t, tr\u00e1nh xa v\u1eadt li\u1ec7u d\u1ec5 ch\u00e1y<\/li>\n<li>Ghi nh\u00e3n m\u1ea1ch r\u00f5 r\u00e0ng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n khi b\u1ea3o tr\u00ec<\/li>\n<\/ul>\n<h2>C\u00e1ch ch\u1ecdn k\u00edch th\u01b0\u1edbc b\u1ed9 ng\u1eaft m\u1ea1ch DC c\u1ee7a b\u1ea1n: Gi\u1ea3i th\u00edch quy t\u1eafc 1.25x<\/h2>\n<p>Kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c h\u1ec7 th\u1ed1ng AC, n\u01a1i d\u00f2ng \u0111i\u1ec7n dao \u0111\u1ed9ng t\u1ef1 nhi\u00ean v\u00e0 cung c\u1ea5p c\u00e1c kho\u1ea3ng th\u1eddi gian l\u00e0m m\u00e1t, t\u1ea3i DC\u2014\u0111\u1eb7c bi\u1ec7t trong c\u00e1c \u1ee9ng d\u1ee5ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi quang \u0111i\u1ec7n v\u00e0 pin\u2014duy tr\u00ec d\u00f2ng \u0111i\u1ec7n cao li\u00ean t\u1ee5c trong th\u1eddi gian d\u00e0i. D\u00f2ng \u0111i\u1ec7n li\u00ean t\u1ee5c n\u00e0y t\u1ea1o ra nhi\u1ec7t t\u00edch l\u0169y trong d\u00e2y d\u1eabn v\u00e0 ti\u1ebfp \u0111i\u1ec3m c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch, \u0111\u00f2i h\u1ecfi c\u00e1c k\u1ef9 s\u01b0 ph\u1ea3i \u00e1p d\u1ee5ng c\u00e1c h\u1ec7 s\u1ed1 an to\u00e0n \u0111\u1ec3 ng\u0103n ch\u1eb7n vi\u1ec7c ng\u1eaft m\u1ea1ch kh\u00f4ng mong mu\u1ed1n, qu\u00e1 nhi\u1ec7t ti\u1ebfp \u0111i\u1ec3m v\u00e0 h\u1ecfng h\u00f3c thi\u1ebft b\u1ecb s\u1edbm.<\/p>\n<p>C\u1ea3 Ti\u00eau chu\u1ea9n \u0110i\u1ec7n Qu\u1ed1c gia (NEC) v\u00e0 ti\u00eau chu\u1ea9n c\u1ee7a \u1ee6y ban K\u1ef9 thu\u1eadt \u0110i\u1ec7n Qu\u1ed1c t\u1ebf (IEC) \u0111\u1ec1u quy \u0111\u1ecbnh r\u1eb1ng c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch DC ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh c\u1ee1 \u0111\u1ec3 x\u1eed l\u00fd 125% d\u00f2ng \u0111i\u1ec7n t\u1ea3i li\u00ean t\u1ee5c, \u0111\u1ea3m b\u1ea3o ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong \u0111i\u1ec1u ki\u1ec7n d\u00f2ng \u0111i\u1ec7n cao li\u00ean t\u1ee5c.<\/p>\n<h3>1. <a href=\"https:\/\/test.viox.com\/vi\/ue-vs-ui-vs-uimp-voltage-ratings-guide\/\">\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/a> L\u1ef1a ch\u1ecdn (V<sub>breaker<\/sub>)<\/h3>\n<p>\u0110i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a c\u1ee7a h\u1ec7 th\u1ed1ng \u0111\u1ec3 cung c\u1ea5p kh\u1ea3 n\u0103ng tri\u1ec7t ti\u00eau h\u1ed3 quang v\u00e0 \u0111\u1ed9 b\u1ec1n \u0111i\u1ec7n m\u00f4i \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<p><strong>Quy t\u1eafc k\u1ef9 thu\u1eadt:<\/strong><br \/>\nV<sub>breaker<\/sub> \u2265 V<sub>system_max<\/sub><\/p>\n<p>\u0110\u1ec3 c\u00f3 bi\u00ean \u0111\u1ed9 an to\u00e0n t\u1ed1i \u01b0u, h\u00e3y ch\u1ecdn \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch \u00edt nh\u1ea5t l\u00e0 125% \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a c\u1ee7a h\u1ec7 th\u1ed1ng:<\/p>\n<p><strong>V\u00ed d\u1ee5 1:<\/strong> H\u1ec7 th\u1ed1ng pin 48V v\u1edbi \u0111i\u1ec7n \u00e1p s\u1ea1c t\u1ed1i \u0111a 58V<\/p>\n<ul>\n<li>\u0110\u1ecbnh m\u1ee9c b\u1ed9 ng\u1eaft m\u1ea1ch t\u1ed1i thi\u1ec3u: 58V \u00d7 1.25 = <strong>72.5V \u2192 Ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u1ecbnh m\u1ee9c 80V<\/strong><\/li>\n<\/ul>\n<p><strong>\u26a0\ufe0f C\u1ea3nh b\u00e1o quan tr\u1ecdng:<\/strong> Kh\u00f4ng bao gi\u1edd thay th\u1ebf b\u1ed9 ng\u1eaft m\u1ea1ch AC 230V trong c\u00e1c \u1ee9ng d\u1ee5ng DC, ngay c\u1ea3 \u1edf \u0111i\u1ec7n \u00e1p DC th\u1ea5p h\u01a1n. B\u1ed9 ng\u1eaft m\u1ea1ch AC 250V c\u00f3 th\u1ec3 h\u1ecfng h\u00f3c nghi\u00eam tr\u1ecdng ch\u1ec9 \u1edf 48V DC do c\u01a1 ch\u1ebf tri\u1ec7t ti\u00eau h\u1ed3 quang DC kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7. \u0110i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c AC v\u1ec1 c\u01a1 b\u1ea3n kh\u00f4ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c y\u00eau c\u1ea7u ng\u1eaft m\u1ea1ch DC.<\/p>\n<h3>2. T\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (I<sub>breaker<\/sub>)<\/h3>\n<p>Theo \u0110i\u1ec1u 690.8(B) c\u1ee7a NEC v\u00e0 ti\u00eau chu\u1ea9n IEC 60947-2, c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ea3o v\u1ec7 t\u1ea3i li\u00ean t\u1ee5c (ho\u1ea1t \u0111\u1ed9ng &gt;3 gi\u1edd) ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ecbnh m\u1ee9c \u1edf 125% d\u00f2ng \u0111i\u1ec7n t\u1ea3i li\u00ean t\u1ee5c.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c h\u1ec7 s\u1ed1 an to\u00e0n 1.25x:<\/strong><br \/>\nT\u00f4i<sub>breaker<\/sub> = I<sub>continuous_load<\/sub> \u00d7 1.25<\/p>\n<p>H\u1ec7 s\u1ed1 an to\u00e0n n\u00e0y t\u00ednh \u0111\u1ebfn:<\/p>\n<ul>\n<li>Ph\u00e1t sinh nhi\u1ec7t li\u00ean t\u1ee5c trong h\u1ec7 th\u1ed1ng DC m\u00e0 kh\u00f4ng c\u00f3 kho\u1ea3ng th\u1eddi gian l\u00e0m m\u00e1t t\u1ef1 nhi\u00ean<\/li>\n<li>Bi\u1ebfn \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1eb7c t\u00ednh nhi\u1ec7t c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li>\u0110i\u1ec7n tr\u1edf d\u00e2y d\u1eabn t\u0103ng theo nhi\u1ec7t \u0111\u1ed9<\/li>\n<li>Dung sai s\u1ea3n xu\u1ea5t trong \u0111\u1eb7c t\u00ednh ng\u1eaft m\u1ea1ch<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf 1 \u2013 D\u00e0n pin m\u1eb7t tr\u1eddi PV:<\/strong><\/p>\n<p>B\u1ea1n c\u00f3 m\u1ed9t d\u00e0n pin m\u1eb7t tr\u1eddi quang \u0111i\u1ec7n t\u1ea1o ra <strong>20 Amps li\u00ean t\u1ee5c<\/strong> trong gi\u1edd n\u1eafng cao \u0111i\u1ec3m.<\/p>\n<ul>\n<li>T\u00ednh to\u00e1n: 20A \u00d7 1.25 = <strong>25A<\/strong><\/li>\n<li>L\u1ef1a ch\u1ecdn: Ch\u1ecdn k\u00edch th\u01b0\u1edbc ti\u00eau chu\u1ea9n ti\u1ebfp theo \u2192 <strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC 25A ho\u1eb7c 32A<\/strong><\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5 th\u1ef1c t\u1ebf 2 \u2013 B\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ea1c n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi:<\/strong><\/p>\n<ul>\n<li>B\u1ed9 \u0111i\u1ec1u khi\u1ec3n s\u1ea1c n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi: 3000W \u00f7 48V = 62.5A<\/li>\n<li>\u0110\u1ecbnh m\u1ee9c b\u1ed9 ng\u1eaft m\u1ea1ch y\u00eau c\u1ea7u: 62.5A \u00d7 1.25 = <strong>78.125A \u2192 Ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch 80A ho\u1eb7c 100A<\/strong><\/li>\n<\/ul>\n<p><strong>D\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c ti\u00eau chu\u1ea9n c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch:<\/strong> Khi \u00e1p d\u1ee5ng quy t\u1eafc 1.25x, h\u00e3y l\u00e0m tr\u00f2n l\u00ean \u0111\u1ecbnh m\u1ee9c ti\u00eau chu\u1ea9n c\u00f3 s\u1eb5n ti\u1ebfp theo: 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A, 80A, 100A, 125A.<\/p>\n<h3>3. Kh\u1ea3 n\u0103ng c\u1eaft (\u0110\u1ecbnh m\u1ee9c AIC)<\/h3>\n<p>Kh\u1ea3 n\u0103ng c\u1eaft ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 d\u00f2ng ng\u1eafn m\u1ea1ch t\u1ed1i \u0111a c\u00f3 s\u1eb5n. \u0110\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng pin c\u00f3 \u0111i\u1ec7n tr\u1edf trong th\u1ea5p, d\u00f2ng ng\u1eafn m\u1ea1ch c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c nguy hi\u1ec3m m\u00e0 c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch ti\u00eau chu\u1ea9n kh\u00f4ng th\u1ec3 c\u1eaft m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>\n<p><strong>\u01af\u1edbc t\u00ednh d\u00f2ng ng\u1eafn m\u1ea1ch:<\/strong><br \/>\nT\u00f4i<sub>s\u1ef1 c\u1ed1<\/sub> = V<sub>battery<\/sub> \/ R<sub>total<\/sub><\/p>\n<p>Trong \u0111\u00f3 R<sub>total<\/sub> bao g\u1ed3m \u0111i\u1ec7n tr\u1edf trong c\u1ee7a pin, \u0111i\u1ec7n tr\u1edf d\u00e2y d\u1eabn v\u00e0 \u0111i\u1ec7n tr\u1edf k\u1ebft n\u1ed1i.<\/p>\n<p><strong>V\u00ed d\u1ee5:<\/strong> Ng\u00e2n h\u00e0ng pin 48V v\u1edbi t\u1ed5ng \u0111i\u1ec7n tr\u1edf 0.01\u03a9<\/p>\n<ul>\n<li>D\u00f2ng ng\u1eafn m\u1ea1ch: 48V \u00f7 0.01\u03a9 = <strong>4,800A<\/strong><\/li>\n<li>\u0110\u1ecbnh m\u1ee9c AIC y\u00eau c\u1ea7u: T\u1ed1i thi\u1ec3u <strong>6kA<\/strong>, \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb <strong>10kA<\/strong><\/li>\n<\/ul>\n<p><strong>H\u01b0\u1edbng d\u1eabn Ch\u1ecdn AIC theo \u1ee8ng d\u1ee5ng:<\/strong><\/p>\n<ul>\n<li>H\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi d\u00e2n d\u1ee5ng (ng\u00e2n h\u00e0ng pin nh\u1ecf): T\u1ed1i thi\u1ec3u 5kA<\/li>\n<li>L\u1eafp \u0111\u1eb7t n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i: T\u1ed1i thi\u1ec3u 10kA<\/li>\n<li>L\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng pin c\u00f4ng nghi\u1ec7p (ng\u00e2n h\u00e0ng l\u1edbn): T\u1ed1i thi\u1ec3u 15-20kA<\/li>\n<li>\u1ee8ng d\u1ee5ng quy m\u00f4 ti\u1ec7n \u00edch: Y\u00eau c\u1ea7u 25kA+<\/li>\n<\/ul>\n<p>\u0110\u00e1nh gi\u00e1 th\u1ea5p kh\u1ea3 n\u0103ng c\u1eaft g\u00e2y ra r\u1ee7i ro h\u1ecfng h\u00f3c th\u1ea3m kh\u1ed1c\u2014b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 ph\u00e1t n\u1ed5 ho\u1eb7c h\u00e0n k\u00edn trong \u0111i\u1ec1u ki\u1ec7n s\u1ef1 c\u1ed1, lo\u1ea1i b\u1ecf t\u1ea5t c\u1ea3 c\u00e1c bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 m\u1ea1ch.<\/p>\n<h2>H\u01b0\u1edbng d\u1eabn Ch\u1ecdn B\u1ed9 ng\u1eaft m\u1ea1ch DC theo \u0110i\u1ec7n \u00e1p H\u1ec7 th\u1ed1ng<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f5f5f5;\">\n<th>H\u1ec7 Th\u1ed1ng \u0110i\u1ec7n \u00c1p<\/th>\n<th>\u0110i\u1ec3n H\u00ecnh \u1ee8ng D\u1ee5ng<\/th>\n<th>\u0110\u1ecbnh m\u1ee9c B\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c \u0110\u1ec1 xu\u1ea5t<\/th>\n<th>Ph\u1ea1m Vi Hi\u1ec7n T\u1ea1i<\/th>\n<th>AIC T\u1ed1i thi\u1ec3u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>12V DC<\/strong><\/td>\n<td>\u00d4 t\u00f4, chi\u1ebfu s\u00e1ng RV, thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u00e0ng h\u1ea3i<\/td>\n<td>24V ho\u1eb7c 32V<\/td>\n<td>5-100A<\/td>\n<td>5kA<\/td>\n<\/tr>\n<tr>\n<td><strong>24V DC<\/strong><\/td>\n<td>Vi\u1ec5n th\u00f4ng, h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi nh\u1ecf<\/td>\n<td>48V ho\u1eb7c 60V<\/td>\n<td>10-125A<\/td>\n<td>5kA<\/td>\n<\/tr>\n<tr>\n<td><strong>48V DC<\/strong><\/td>\n<td>N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi ngo\u00e0i l\u01b0\u1edbi, trung t\u00e2m d\u1eef li\u1ec7u, vi\u1ec5n th\u00f4ng<\/td>\n<td>80V ho\u1eb7c 100V<\/td>\n<td>20-250A<\/td>\n<td>10kA<\/td>\n<\/tr>\n<tr>\n<td><strong>120-250V DC<\/strong><\/td>\n<td>N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i, s\u1ea1c EV<\/td>\n<td>400V ho\u1eb7c 500V<\/td>\n<td>32-400A<\/td>\n<td>15kA<\/td>\n<\/tr>\n<tr>\n<td><strong>600-1000V DC<\/strong><\/td>\n<td>N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi quy m\u00f4 ti\u1ec7n \u00edch, BESS<\/td>\n<td>1000V ho\u1eb7c 1500V<\/td>\n<td>63-630A<\/td>\n<td>20kA+<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border: 1px solid #ddd;\" src=\"https:\/\/img.viox.com\/VIOX-DC-MCB-close-up-showing-internal-arc-suppression-components-and-contact-system.webp\" alt=\"VIOX DC MCB close-up showing internal arc suppression components and contact system\" \/><figcaption style=\"font-style: italic; color: #555; margin-top: 8px; font-size: 0.9em;\">C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a VIOX DC MCB c\u00f3 m\u00e1ng h\u1ed3 quang n\u00e2ng cao v\u00e0 cu\u1ed9n d\u00e2y d\u1eadp h\u1ed3 quang t\u1eeb t\u00ednh \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ch DC \u0111\u00e1ng tin c\u1eady l\u00ean \u0111\u1ebfn 1000V.<\/figcaption><\/figure>\n<h2>C\u00e1c lo\u1ea1i m\u00e1y c\u1eaft m\u1ea1ch DC<\/h2>\n<h3>M\u00e1y c\u1eaft m\u1ea1ch thu nh\u1ecf (DC MCB)<\/h3>\n<ul>\n<li><strong>Ph\u1ea1m vi hi\u1ec7n t\u1ea1i:<\/strong> 6A \u0111\u1ebfn 125A<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng:<\/strong> N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi d\u00e2n d\u1ee5ng, h\u1ec7 th\u1ed1ng RV, vi\u1ec5n th\u00f4ng<\/li>\n<li><strong>Thu\u1eadn l\u1ee3i:<\/strong> Nh\u1ecf g\u1ecdn, l\u1eafp tr\u00ean DIN-rail, hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">M\u00e1y c\u1eaft m\u1ea1ch d\u1ea1ng h\u1ed9p \u0111\u00fac<\/a> (DC MCCB)<\/h3>\n<ul>\n<li><strong>Ph\u1ea1m vi hi\u1ec7n t\u1ea1i:<\/strong> 100A \u0111\u1ebfn 2500A<\/li>\n<li><strong>\u1ee8ng d\u1ee5ng:<\/strong> N\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi th\u01b0\u01a1ng m\u1ea1i, h\u1ec7 th\u1ed1ng pin c\u00f4ng nghi\u1ec7p, s\u1ea1c EV<\/li>\n<li><strong>\u0110\u1eb7c tr\u01b0ng:<\/strong> C\u00e0i \u0111\u1eb7t chuy\u1ebfn \u0111i c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh, kh\u1ea3 n\u0103ng c\u1eaft cao h\u01a1n<\/li>\n<\/ul>\n<h3><a href=\"https:\/\/test.viox.com\/vi\/type-of-mcb\/\">\u0110\u1eb7c t\u00ednh \u0110\u01b0\u1eddng cong Chuy\u1ebfn \u0111i<\/a><\/h3>\n<table style=\"width: 100%; border-collapse: collapse; margin: 20px 0; border: 1px solid #ccc;\" border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr style=\"background-color: #f5f5f5;\">\n<th>\u0110\u01b0\u1eddng cong chuy\u1ebfn \u0111i<\/th>\n<th>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/th>\n<th>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/th>\n<th>T\u00ednh ph\u00f9 h\u1ee3p DC<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Lo\u1ea1i B<\/strong><\/td>\n<td>D\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c 3-5\u00d7<\/td>\n<td>Chi\u1ebfu s\u00e1ng, n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi d\u00e2n d\u1ee5ng<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i C<\/strong><\/td>\n<td>D\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c 5-10\u00d7<\/td>\n<td>Th\u01b0\u01a1ng m\u1ea1i t\u1ed5ng h\u1ee3p, h\u1ec7 th\u1ed1ng pin<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i D<\/strong><\/td>\n<td>D\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c 10-20\u00d7<\/td>\n<td>M\u1ea1ch \u0111\u1ed9ng c\u01a1, t\u1ea3i kh\u1edfi \u0111\u1ed9ng cao<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i K\/Z<\/strong><\/td>\n<td>C\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/td>\n<td>Vi\u1ec5n th\u00f4ng, thi\u1ebft b\u1ecb nh\u1ea1y c\u1ea3m<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng quan tr\u1ecdng c\u1ee7a m\u00e1y c\u1eaft m\u1ea1ch DC<\/h2>\n<h3>H\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n m\u1eb7t tr\u1eddi<\/h3>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch DC b\u1ea3o v\u1ec7 c\u00e1c m\u1ea3ng PV, b\u1ed9 k\u1ebft h\u1ee3p chu\u1ed7i v\u00e0 \u0111\u1ea7u v\u00e0o bi\u1ebfn t\u1ea7n. C\u00e1c y\u00eau c\u1ea7u ch\u00ednh bao g\u1ed3m:<\/p>\n<ul>\n<li>\u200b\u200b\u0110\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p l\u00ean \u0111\u1ebfn 1000V ho\u1eb7c 1500V<\/li>\n<li>Ho\u1ea1t \u0111\u1ed9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao (thi\u1ebft b\u1ecb g\u1eafn tr\u00ean m\u00e1i nh\u00e0)<\/li>\n<li>V\u1ecf ch\u1ed1ng tia c\u1ef1c t\u00edm<\/li>\n<\/ul>\n<h3>H\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng pin (BESS)<\/h3>\n<p>B\u1ea3o v\u1ec7 cho c\u00e1c ng\u00e2n h\u00e0ng pin lithium-ion v\u00e0 axit-ch\u00ec y\u00eau c\u1ea7u:<\/p>\n<ul>\n<li>X\u1eed l\u00fd d\u00f2ng \u0111i\u1ec7n hai chi\u1ec1u (s\u1ea1c\/x\u1ea3)<\/li>\n<li>\u0110\u1ecbnh m\u1ee9c AIC cao (&gt;10kA) do tr\u1edf kh\u00e1ng pin th\u1ea5p<\/li>\n<li>T\u00edch h\u1ee3p gi\u00e1m s\u00e1t nhi\u1ec7t<\/li>\n<\/ul>\n<h3>Xe \u0110i\u1ec7n C\u01a1 S\u1edf H\u1ea1 T\u1ea7ng S\u1ea1c<\/h3>\n<p>B\u1ed9 s\u1ea1c nhanh DC y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 chuy\u00ean d\u1ee5ng:<\/p>\n<ul>\n<li>\u0110\u1ecbnh m\u1ee9c d\u00f2ng \u0111i\u1ec7n 125A \u0111\u1ebfn 500A<\/li>\n<li>Th\u1eddi gian ph\u1ea3n h\u1ed3i nhanh (&lt;5ms)<\/li>\n<li>Giao th\u1ee9c giao ti\u1ebfp \u0111\u1ec3 s\u1ea1c th\u00f4ng minh<\/li>\n<\/ul>\n<h3>Trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 vi\u1ec5n th\u00f4ng<\/h3>\n<p>C\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng y\u00eau c\u1ea7u:<\/p>\n<ul>\n<li>\u0110\u1ed9 tin c\u1eady cao (MTBF &gt;100.000 gi\u1edd)<\/li>\n<li>Kh\u1ea3 n\u0103ng gi\u00e1m s\u00e1t t\u1eeb xa<\/li>\n<li>Ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc v\u1edbi b\u1ea3o v\u1ec7 ng\u01b0\u1ee3c d\u00f2ng<\/li>\n<\/ul>\n<h2>C\u00e1c c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p v\u1ec1 b\u1ed9 ng\u1eaft m\u1ea1ch DC<\/h2>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea7u dao (MCB\/MCCB) AC cho c\u00e1c \u1ee9ng d\u1ee5ng DC kh\u00f4ng?<\/h3>\n<p><strong>Kh\u00f4ng, tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng.<\/strong> B\u1ed9 ng\u1eaft m\u1ea1ch AC thi\u1ebfu c\u00e1c c\u01a1 ch\u1ebf tri\u1ec7t ti\u00eau h\u1ed3 quang chuy\u00ean d\u1ee5ng c\u1ea7n thi\u1ebft \u0111\u1ec3 ng\u1eaft d\u00f2ng \u0111i\u1ec7n DC. S\u1eed d\u1ee5ng b\u1ed9 ng\u1eaft m\u1ea1ch AC trong \u1ee9ng d\u1ee5ng DC t\u1ea1o ra r\u1ee7i ro nghi\u00eam tr\u1ecdng v\u1ec1 h\u1ecfa ho\u1ea1n v\u00e0 h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb. Vi\u1ec7c kh\u00f4ng c\u00f3 c\u00e1c \u0111i\u1ec3m giao nhau b\u1eb1ng kh\u00f4ng trong h\u1ec7 th\u1ed1ng DC c\u00f3 ngh\u0129a l\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch AC kh\u00f4ng th\u1ec3 d\u1eadp t\u1eaft h\u1ed3 quang m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady, c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn \u0111\u1ebfn h\u00e0n ti\u1ebfp x\u00fac v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n m\u1ea5t ki\u1ec3m so\u00e1t nhi\u1ec7t.<\/p>\n<h3>\u0110i\u1ec1u g\u00ec g\u00e2y ra s\u1ef1 c\u1ed1 (trip) c\u1ee7a m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch DC (DC circuit breaker)?<\/h3>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch DC ng\u1eaft do: (1) <strong>\u0110i\u1ec1u ki\u1ec7n qu\u00e1 d\u00f2ng<\/strong> trong \u0111\u00f3 d\u00f2ng \u0111i\u1ec7n t\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111\u1ecbnh m\u1ee9c nhi\u1ec7t c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch trong th\u1eddi gian d\u00e0i, (2) <strong>M\u1ea1ch ng\u1eafn<\/strong> t\u1ea1o ra d\u00f2ng \u0111i\u1ec7n ng\u1eafn m\u1ea1ch cao t\u1ee9c th\u1eddi k\u00edch ho\u1ea1t c\u01a1 ch\u1ebf ng\u1eaft t\u1eeb, (3) <strong>L\u1ed7i ti\u1ebfp \u0111\u1ea5t<\/strong> trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f3 b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t, v\u00e0 (4) <strong>H\u1ed3 quang \u0111i\u1ec7n<\/strong> trong c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch \u0111\u01b0\u1ee3c trang b\u1ecb t\u00ednh n\u0103ng ph\u00e1t hi\u1ec7n h\u1ed3 quang \u0111i\u1ec7n. Thi\u1ebft k\u1ebf nhi\u1ec7t-t\u1eeb cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ph\u1ed1i h\u1ee3p ch\u1ed1ng l\u1ea1i c\u1ea3 qu\u00e1 t\u1ea3i k\u00e9o d\u00e0i v\u00e0 s\u1ef1 c\u1ed1 t\u1ee9c th\u1eddi.<\/p>\n<h3>Chi\u1ec1u ph\u00e2n c\u1ef1c c\u00f3 quan tr\u1ecdng khi \u0111\u1ea5u d\u00e2y aptomat DC kh\u00f4ng?<\/h3>\n<p><strong>C\u00f3, \u0111\u1ed1i v\u1edbi h\u1ea7u h\u1ebft c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch DC.<\/strong> C\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch DC ph\u00e2n c\u1ef1c ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ea5u d\u00e2y v\u1edbi c\u1ef1c d\u01b0\u01a1ng (+) \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi ngu\u1ed3n \u0111i\u1ec7n v\u00e0 c\u1ef1c \u00e2m (-) \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi t\u1ea3i. \u0110\u1ea3o ng\u01b0\u1ee3c c\u1ef1c c\u00f3 th\u1ec3 v\u00f4 hi\u1ec7u h\u00f3a c\u00e1c c\u01a1 ch\u1ebf tri\u1ec7t ti\u00eau h\u1ed3 quang v\u00e0 g\u00e2y ra nguy c\u01a1 h\u1ecfa ho\u1ea1n. Tuy nhi\u00ean, <strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC kh\u00f4ng ph\u00e2n c\u1ef1c VIOX<\/strong> ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c b\u1ea5t k\u1ec3 h\u01b0\u1edbng k\u1ebft n\u1ed1i, lo\u1ea1i b\u1ecf r\u1ee7i ro l\u1eafp \u0111\u1eb7t n\u00e0y v\u00e0 mang l\u1ea1i s\u1ef1 linh ho\u1ea1t cao h\u01a1n.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc aptomat ph\u00f9 h\u1ee3p cho h\u1ec7 th\u1ed1ng n\u0103ng l\u01b0\u1ee3ng m\u1eb7t tr\u1eddi c\u1ee7a t\u00f4i?<\/h3>\n<p>T\u00ednh to\u00e1n k\u00edch th\u01b0\u1edbc b\u1ed9 ng\u1eaft m\u1ea1ch b\u1eb1ng c\u00f4ng th\u1ee9c sau: <strong>\u0110\u1ecbnh m\u1ee9c b\u1ed9 ng\u1eaft m\u1ea1ch = D\u00f2ng \u0111i\u1ec7n t\u1ed1i \u0111a \u00d7 1,25<\/strong>. V\u00ed d\u1ee5: m\u1ed9t d\u00e3y pin m\u1eb7t tr\u1eddi 5kW \u1edf 48V t\u1ea1o ra 104A (5000W \u00f7 48V). \u00c1p d\u1ee5ng h\u1ec7 s\u1ed1 an to\u00e0n 1,25: 104A \u00d7 1,25 = 130A, v\u00ec v\u1eady h\u00e3y ch\u1ecdn <strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC 150A<\/strong>. Lu\u00f4n x\u00e1c minh \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p t\u1ed1i \u0111a c\u1ee7a h\u1ec7 th\u1ed1ng v\u00e0 kh\u1ea3 n\u0103ng c\u1eaft v\u01b0\u1ee3t qu\u00e1 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 \u0111\u00e3 t\u00ednh to\u00e1n.<\/p>\n<h3>S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa d\u00f2ng c\u1eaft \u0111\u1ecbnh m\u1ee9c (AIC) v\u00e0 \u0111i\u1ec7n \u00e1p \u0111\u1ecbnh m\u1ee9c l\u00e0 g\u00ec?<\/h3>\n<p><strong>X\u1ebfp h\u1ea1ng \u0111i\u1ec7n \u00e1p<\/strong> cho bi\u1ebft \u0111i\u1ec7n \u00e1p ho\u1ea1t \u0111\u1ed9ng li\u00ean t\u1ee5c t\u1ed1i \u0111a m\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 x\u1eed l\u00fd m\u1ed9t c\u00e1ch an to\u00e0n (v\u00ed d\u1ee5: 1000V DC). <strong>AIC (Kh\u1ea3 n\u0103ng ng\u1eaft d\u00f2ng Ampe)<\/strong> ch\u1ec9 \u0111\u1ecbnh d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 t\u1ed1i \u0111a m\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 c\u1eaft m\u1ed9t c\u00e1ch an to\u00e0n m\u00e0 kh\u00f4ng b\u1ecb h\u01b0 h\u1ea1i (v\u00ed d\u1ee5: 10kA). C\u1ea3 hai \u0111\u1ecbnh m\u1ee9c \u0111\u1ec1u r\u1ea5t quan tr\u1ecdng: \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng, trong khi AIC ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 t\u1ed1i \u0111a c\u00f3 s\u1eb5n. Vi\u1ec7c gi\u1ea3m k\u00edch th\u01b0\u1edbc b\u1ea5t k\u1ef3 th\u00f4ng s\u1ed1 n\u00e0o \u0111\u1ec1u t\u1ea1o ra c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 an to\u00e0n.<\/p>\n<h3>N\u00ean ki\u1ec3m tra v\u00e0 b\u1ea3o tr\u00ec aptomat DC (MCB DC) v\u1edbi t\u1ea7n su\u1ea5t nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p><strong>Ki\u1ec3m tra ban \u0111\u1ea7u:<\/strong> Trong v\u00f2ng 30 ng\u00e0y k\u1ec3 t\u1eeb ng\u00e0y l\u1eafp \u0111\u1eb7t, h\u00e3y v\u1eadn h\u00e0nh th\u1ee7 c\u00f4ng b\u1ed9 ng\u1eaft m\u1ea1ch 3-5 l\u1ea7n \u0111\u1ec3 x\u00e1c minh ch\u1ee9c n\u0103ng c\u01a1 h\u1ecdc. <strong>B\u1ea3o tr\u00ec \u0111\u1ecbnh k\u1ef3:<\/strong> Ki\u1ec3m tra h\u00e0ng qu\u00fd \u0111\u1ec3 t\u00ecm c\u00e1c d\u1ea5u hi\u1ec7u qu\u00e1 nhi\u1ec7t (\u0111\u1ed5i m\u00e0u, c\u00e1ch \u0111i\u1ec7n b\u1ecb n\u00f3ng ch\u1ea3y), x\u00e1c minh m\u00f4-men xo\u1eafn tr\u00ean c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ea7u cu\u1ed1i (theo th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t) v\u00e0 ki\u1ec3m tra ch\u1ee9c n\u0103ng ng\u1eaft m\u1ea1ch n\u1eeda n\u0103m m\u1ed9t l\u1ea7n. <strong>Ti\u00eau ch\u00ed thay th\u1ebf:<\/strong> Thay th\u1ebf c\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 d\u1ea5u hi\u1ec7u \u0103n m\u00f2n ti\u1ebfp \u0111i\u1ec3m, h\u01b0 h\u1ecfng v\u1ecf ho\u1eb7c \u0111\u00e3 c\u1eaft d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 l\u1edbn v\u01b0\u1ee3t qu\u00e1 80% \u0111\u1ecbnh m\u1ee9c AIC c\u1ee7a ch\u00fang. C\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 \u0111\u1ed9 tin c\u1eady cao c\u00f3 th\u1ec3 y\u00eau c\u1ea7u ki\u1ec3m tra h\u00ecnh \u1ea3nh nhi\u1ec7t h\u00e0ng n\u0103m.<\/p>\n<h2>K\u1ebft lu\u1eadn: L\u1ef1a ch\u1ecdn B\u1ed9 ng\u1eaft m\u1ea1ch DC ph\u00f9 h\u1ee3p<\/h2>\n<p>B\u1ed9 ng\u1eaft m\u1ea1ch DC \u0111\u1ea1i di\u1ec7n cho th\u00e0nh ph\u1ea7n an to\u00e0n quan tr\u1ecdng nh\u1ea5t trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n m\u1ed9t chi\u1ec1u. Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t c\u01a1 b\u1ea3n gi\u1eefa b\u1ea3o v\u1ec7 AC v\u00e0 DC\u2014\u0111\u1eb7c bi\u1ec7t l\u00e0 th\u00e1ch th\u1ee9c v\u1ec1 \u0111i\u1ec3m c\u1eaft kh\u00f4ng v\u00e0 c\u00e1c y\u00eau c\u1ea7u tri\u1ec7t ti\u00eau h\u1ed3 quang\u2014cho ph\u00e9p ch\u1ec9 \u0111\u1ecbnh v\u00e0 l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch.<\/p>\n<p>Khi l\u1ef1a ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch DC, h\u00e3y \u01b0u ti\u00ean ba y\u1ebfu t\u1ed1 thi\u1ebft y\u1ebfu:<\/p>\n<ol>\n<li><strong>X\u1ebfp h\u1ea1ng \u0111i\u1ec7n \u00e1p<\/strong> ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 \u0111i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng t\u1ed1i \u0111a 25%<\/li>\n<li><strong>X\u1ebfp h\u1ea1ng hi\u1ec7n t\u1ea1i<\/strong> ph\u1ea3i l\u00e0 125% d\u00f2ng \u0111i\u1ec7n t\u1ea3i li\u00ean t\u1ee5c<\/li>\n<li><strong>Kh\u1ea3 n\u0103ng ng\u1eaft<\/strong> ph\u1ea3i v\u01b0\u1ee3t qu\u00e1 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 \u0111\u00e3 t\u00ednh to\u00e1n<\/li>\n<\/ol>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng quang \u0111i\u1ec7n m\u1eb7t tr\u1eddi, h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef n\u0103ng l\u01b0\u1ee3ng pin, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng s\u1ea1c EV v\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng vi\u1ec5n th\u00f4ng, <strong>B\u1ed9 ng\u1eaft m\u1ea1ch DC VIOX<\/strong> cung c\u1ea5p \u0111\u1ed9 tin c\u1eady \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ee9ng minh v\u1edbi c\u00e1c t\u00ednh n\u0103ng ti\u00ean ti\u1ebfn bao g\u1ed3m ho\u1ea1t \u0111\u1ed9ng kh\u00f4ng ph\u00e2n c\u1ef1c, kh\u1ea3 n\u0103ng c\u1eaft cao l\u00ean \u0111\u1ebfn 20kA v\u00e0 \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n \u00e1p l\u00ean \u0111\u1ebfn 1500V DC.<\/p>\n<p>Kh\u00f4ng bao gi\u1edd th\u1ecfa hi\u1ec7p v\u1ec1 b\u1ea3o v\u1ec7 m\u1ea1ch DC\u2014kho\u1ea3n \u0111\u1ea7u t\u01b0 t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf v\u00e0o b\u1ed9 ng\u1eaft m\u1ea1ch ch\u1ea5t l\u01b0\u1ee3ng gi\u00fap ng\u0103n ng\u1eeba thi\u1ec7t h\u1ea1i thi\u1ebft b\u1ecb th\u1ea3m kh\u1ed1c, h\u1ecfa ho\u1ea1n \u0111i\u1ec7n v\u00e0 c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 an to\u00e0n. Li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a VIOX Electric \u0111\u1ec3 \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch DC c\u1ee5 th\u1ec3 cho \u1ee9ng d\u1ee5ng v\u00e0 h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt.<\/p>\n<hr \/>\n<p><strong>Gi\u1edbi thi\u1ec7u v\u1ec1 VIOX Electric:<\/strong> L\u00e0 nh\u00e0 s\u1ea3n xu\u1ea5t B2B h\u00e0ng \u0111\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 m\u1ea1ch DC, VIOX Electric chuy\u00ean v\u1ec1 b\u1ed9 ng\u1eaft m\u1ea1ch DC hi\u1ec7u su\u1ea5t cao cho c\u00e1c \u1ee9ng d\u1ee5ng n\u0103ng l\u01b0\u1ee3ng t\u00e1i t\u1ea1o, c\u00f4ng nghi\u1ec7p v\u00e0 v\u1eadn t\u1ea3i. \u0110\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i cung c\u1ea5p h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt cho c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 DC ph\u1ee9c t\u1ea1p tr\u00ean to\u00e0n th\u1ebf gi\u1edbi.<\/p>\n<\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1803.4px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 1803.4px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2458.66px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 2458.66px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3869.88px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 3869.88px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 6738.64px; left: 14px; display: none;\"><\/div>\n<div class=\"simg-pop-btn\" style=\"top: 6738.64px; left: 14px; display: none;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>\u26a0\ufe0f CRITICAL WARNING: Using an AC circuit breaker in a DC application can result in catastrophic equipment failure, electrical fires, and serious safety hazards. The fundamental difference in arc behavior between AC and DC systems makes this substitution extremely dangerous and potentially life-threatening. A DC circuit breaker is a specialized protective device engineered to automatically [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":17695,"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-17692","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\/17692","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=17692"}],"version-history":[{"count":2,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/17692\/revisions"}],"predecessor-version":[{"id":21155,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/17692\/revisions\/21155"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/17695"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=17692"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=17692"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=17692"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}