{"id":18485,"date":"2025-07-16T22:19:42","date_gmt":"2025-07-16T14:19:42","guid":{"rendered":"https:\/\/viox.com\/?p=18485"},"modified":"2026-01-27T02:00:09","modified_gmt":"2026-01-26T18:00:09","slug":"understanding-trip-curves","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/understanding-trip-curves\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 \u0110\u01b0\u1eddng cong Chuy\u1ebfn \u0111i"},"content":{"rendered":"<div class=\"product-intro\">\n<h2>Nh\u1eefng \u0111i\u1ec3m ch\u00ednh<\/h2>\n<ul>\n<li><strong>\u0110\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh<\/strong> l\u00e0 c\u00e1c \u0111\u1ed3 th\u1ecb th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n x\u00e1c \u0111\u1ecbnh t\u1ed1c \u0111\u1ed9 ph\u1ea3n \u1ee9ng c\u1ee7a c\u1ea7u dao \u0111\u1ed1i v\u1edbi c\u00e1c \u0111i\u1ec1u ki\u1ec7n qu\u00e1 d\u00f2ng<\/li>\n<li><strong>N\u0103m lo\u1ea1i \u0111\u01b0\u1eddng cong ch\u00ednh<\/strong> (B, C, D, K, Z) ph\u1ee5c v\u1ee5 c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau\u2014t\u1eeb thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ea1y c\u1ea3m \u0111\u1ebfn \u0111\u1ed9ng c\u01a1 c\u00f4ng nghi\u1ec7p n\u1eb7ng<\/li>\n<li><strong>C\u01a1 ch\u1ebf nhi\u1ec7t t\u1eeb<\/strong> k\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 qu\u00e1 t\u1ea3i ch\u1eadm v\u1edbi ng\u1eaft m\u1ea1ch ng\u1eafn t\u1ee9c th\u1eddi<\/li>\n<li><strong>L\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng cong ph\u00f9 h\u1ee3p<\/strong> lo\u1ea1i b\u1ecf vi\u1ec7c ng\u1eaft m\u1ea1ch kh\u00f4ng c\u1ea7n thi\u1ebft \u0111\u1ed3ng th\u1eddi duy tr\u00ec kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 m\u1ea1nh m\u1ebd cho d\u00e2y d\u1eabn v\u00e0 thi\u1ebft b\u1ecb<\/li>\n<li><strong>IEC 60898-1 v\u00e0 IEC 60947-2<\/strong> c\u00e1c ti\u00eau chu\u1ea9n x\u00e1c \u0111\u1ecbnh \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch cho MCB v\u00e0 MCCB<\/li>\n<li><strong>\u0110\u1ecdc \u0111\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch<\/strong> \u0111\u00f2i h\u1ecfi s\u1ef1 hi\u1ec3u bi\u1ebft v\u1ec1 thang \u0111o logarit, d\u1ea3i dung sai v\u00e0 \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/li>\n<li><strong>Ph\u00e2n t\u00edch ph\u1ed1i h\u1ee3p<\/strong> \u0111\u1ea3m b\u1ea3o c\u00e1c c\u1ea7u dao h\u1ea1 ngu\u1ed3n ng\u1eaft tr\u01b0\u1edbc c\u00e1c thi\u1ebft b\u1ecb th\u01b0\u1ee3ng ngu\u1ed3n, c\u00e1ch ly s\u1ef1 c\u1ed1 hi\u1ec7u qu\u1ea3<\/li>\n<\/ul>\n<hr \/>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Professional-installation-of-VIOX-miniature-circuit-breakers-on-DIN-rail-showing-proper-labeling-and-organization-in-industrial-electrical-panel.webp\" alt=\"Professional installation of VIOX miniature circuit breakers on DIN rail showing proper labeling and organization in industrial electrical panel\" \/><figcaption style=\"font-style: italic; color: #666; font-size: 0.9em; margin-top: 10px;\">H\u00ecnh 1: L\u1eafp \u0111\u1eb7t chuy\u00ean nghi\u1ec7p c\u1ea7u dao VIOX, trong \u0111\u00f3 vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch ph\u00f9 h\u1ee3p \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady trong t\u1ee7 \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p.<\/figcaption><\/figure>\n<p>M\u1ed9t <strong>\u0111\u01b0\u1eddng cong chuy\u1ebfn \u0111i<\/strong> l\u00e0 m\u1ed9t \u0111\u1ed3 th\u1ecb logarit hi\u1ec3n th\u1ecb m\u1ed1i quan h\u1ec7 th\u1eddi gian ng\u1eaft m\u1ea1ch c\u1ee7a c\u1ea7u dao \u1edf c\u00e1c m\u1ee9c qu\u00e1 d\u00f2ng kh\u00e1c nhau. Tr\u1ee5c ho\u00e0nh bi\u1ec3u th\u1ecb d\u00f2ng \u0111i\u1ec7n (th\u01b0\u1eddng \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb d\u01b0\u1edbi d\u1ea1ng b\u1ed9i s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c, In), trong khi tr\u1ee5c tung hi\u1ec3n th\u1ecb th\u1eddi gian ng\u1eaft m\u1ea1ch tr\u00ean thang \u0111o logarit t\u1eeb mili gi\u00e2y \u0111\u1ebfn gi\u1edd.<\/p>\n<p>\u0110\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch l\u00e0 n\u1ec1n t\u1ea3ng cho b\u1ea3o v\u1ec7 \u0111i\u1ec7n v\u00ec ch\u00fang cho ph\u00e9p c\u00e1c k\u1ef9 s\u01b0:<\/p>\n<ol>\n<li><strong>K\u1ebft h\u1ee3p c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 v\u1edbi \u0111\u1eb7c t\u00ednh t\u1ea3i<\/strong> (\u0111i\u1ec7n tr\u1edf, \u0111i\u1ec7n c\u1ea3m, kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1)<\/li>\n<li><strong>Ph\u1ed1i h\u1ee3p nhi\u1ec1u thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7<\/strong> m\u1eafc n\u1ed1i ti\u1ebfp \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c kh\u1ea3 n\u0103ng ng\u1eaft m\u1ea1ch ch\u1ecdn l\u1ecdc<\/li>\n<li><strong>\u9632\u6b62\u8bef\u8df3\u95f8<\/strong> \u0111\u1ed3ng th\u1eddi duy tr\u00ec kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u1ea7y \u0111\u1ee7 cho d\u00e2y d\u1eabn v\u00e0 thi\u1ebft b\u1ecb<\/li>\n<li><strong>Tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc \u0111i\u1ec7n<\/strong> (NEC, IEC) cho c\u00e1c ph\u01b0\u01a1ng ph\u00e1p l\u1eafp \u0111\u1eb7t an to\u00e0n<\/li>\n<\/ol>\n<p>Hi\u1ec3u c\u00e1c \u0111\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho b\u1ea5t k\u1ef3 ai ch\u1ec9 \u0111\u1ecbnh, l\u1eafp \u0111\u1eb7t ho\u1eb7c b\u1ea3o tr\u00ec h\u1ec7 th\u1ed1ng \u0111i\u1ec7n\u2014t\u1eeb t\u1ee7 \u0111i\u1ec7n d\u00e2n d\u1ee5ng \u0111\u1ebfn m\u1ea1ng l\u01b0\u1edbi ph\u00e2n ph\u1ed1i c\u00f4ng nghi\u1ec7p.<\/p>\n<hr \/>\n<h2>C\u00e1ch C\u1ea7u Dao S\u1eed D\u1ee5ng \u0110\u01b0\u1eddng Cong Ng\u1eaft M\u1ea1ch: C\u01a1 Ch\u1ebf Nhi\u1ec7t T\u1eeb<\/h2>\n<p>C\u1ea7u dao thu nh\u1ecf hi\u1ec7n \u0111\u1ea1i (MCB) v\u00e0 c\u1ea7u dao d\u00f2ng d\u01b0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng (RCBO) s\u1eed d\u1ee5ng <strong>b\u1ea3o v\u1ec7 c\u01a1 ch\u1ebf k\u00e9p<\/strong>:<\/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-cutaway-diagram-of-VIOX-MCB-showing-internal-thermal-magnetic-trip-mechanism-with-bimetallic-strip-and-electromagnetic-coil-components.webp\" alt=\"Technical cutaway diagram of VIOX MCB showing internal thermal magnetic trip mechanism with bimetallic strip and electromagnetic coil components\" \/><figcaption style=\"font-style: italic; color: #666; font-size: 0.9em; margin-top: 10px;\">H\u00ecnh 2: H\u00ecnh \u1ea3nh b\u00ean trong c\u1ee7a MCB VIOX cho th\u1ea5y d\u1ea3i l\u01b0\u1ee1ng kim (b\u1ea3o v\u1ec7 nhi\u1ec7t) v\u00e0 cu\u1ed9n d\u00e2y \u0111i\u1ec7n t\u1eeb (b\u1ea3o v\u1ec7 t\u1eeb) ho\u1ea1t \u0111\u1ed9ng c\u00f9ng nhau.<\/figcaption><\/figure>\n<h3>Ph\u1ea7n t\u1eed Ng\u1eaft Nhi\u1ec7t (B\u1ea3o V\u1ec7 Qu\u00e1 T\u1ea3i)<\/h3>\n<ul>\n<li><strong>D\u1ea3i kim lo\u1ea1i k\u00e9p<\/strong> n\u00f3ng l\u00ean v\u00e0 u\u1ed1n cong d\u01b0\u1edbi t\u00e1c \u0111\u1ed9ng c\u1ee7a qu\u00e1 d\u00f2ng k\u00e9o d\u00e0i<\/li>\n<li><strong>Ph\u1ea3n h\u1ed3i ph\u1ee5 thu\u1ed9c v\u00e0o th\u1eddi gian<\/strong>: D\u00f2ng \u0111i\u1ec7n c\u00e0ng cao th\u00ec ng\u1eaft m\u1ea1ch c\u00e0ng nhanh<\/li>\n<li><strong>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh<\/strong>: 1,13\u00d7 \u0111\u1ebfn 1,45\u00d7 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c trong 1-2 gi\u1edd<\/li>\n<li><strong>Nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9<\/strong>: Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn th\u1eddi gian ng\u1eaft m\u1ea1ch (\u0111\u01b0\u1ee3c hi\u1ec7u ch\u1ec9nh \u1edf 30\u00b0C cho \u0111\u01b0\u1eddng cong B\/C\/D, 20\u00b0C cho \u0111\u01b0\u1eddng cong K\/Z)<\/li>\n<\/ul>\n<h3>Ph\u1ea7n t\u1eed Ng\u1eaft T\u1eeb (B\u1ea3o V\u1ec7 Ng\u1eafn M\u1ea1ch)<\/h3>\n<ul>\n<li><strong>Cu\u1ed9n d\u00e2y \u0111i\u1ec7n t\u1eeb<\/strong> t\u1ea1o ra l\u1ef1c t\u1eeb t\u1ef7 l\u1ec7 v\u1edbi d\u00f2ng \u0111i\u1ec7n<\/li>\n<li><strong>Ph\u1ea3n h\u1ed3i t\u1ee9c th\u1eddi<\/strong>: Ng\u1eaft m\u1ea1ch trong v\u00f2ng 0,01 gi\u00e2y khi c\u00f3 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1<\/li>\n<li><strong>Ng\u01b0\u1ee1ng c\u1ee5 th\u1ec3 theo \u0111\u01b0\u1eddng cong<\/strong>: B (3-5\u00d7 In), C (5-10\u00d7 In), D (10-20\u00d7 In)<\/li>\n<li><strong>Kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o nhi\u1ec7t \u0111\u1ed9<\/strong>: Cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ng\u1eafn m\u1ea1ch nh\u1ea5t qu\u00e1n<\/li>\n<\/ul>\n<p>Nh\u1eefng <strong>\u0111\u01b0\u1eddng cong chuy\u1ebfn \u0111i<\/strong> k\u1ebft h\u1ee3p \u0111\u1ed3 h\u1ecda hai c\u01a1 ch\u1ebf n\u00e0y, hi\u1ec3n th\u1ecb v\u00f9ng nhi\u1ec7t d\u01b0\u1edbi d\u1ea1ng m\u1ed9t d\u1ea3i d\u1ed1c (th\u1eddi gian d\u00e0i h\u01a1n \u1edf d\u00f2ng \u0111i\u1ec7n th\u1ea5p h\u01a1n) v\u00e0 v\u00f9ng t\u1eeb d\u01b0\u1edbi d\u1ea1ng m\u1ed9t \u0111\u01b0\u1eddng g\u1ea7n nh\u01b0 th\u1eb3ng \u0111\u1ee9ng (t\u1ee9c th\u1eddi \u1edf d\u00f2ng \u0111i\u1ec7n cao).<\/p>\n<hr \/>\n<h2>5 Lo\u1ea1i \u0110\u01b0\u1eddng Cong Ng\u1eaft M\u1ea1ch Ti\u00eau Chu\u1ea9n: So S\u00e1nh Ho\u00e0n Ch\u1ec9nh<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Comparison-chart-of-VIOX-Type-B-C-and-D-trip-curves-showing-different-magnetic-trip-thresholds-for-various-applications-from-residential-to-heavy-industrial.webp\" alt=\"Comparison chart of VIOX Type B C and D trip curves showing different magnetic trip thresholds for various applications\" \/><figcaption style=\"font-style: italic; color: #666; font-size: 0.9em; margin-top: 10px;\">H\u00ecnh 3: So s\u00e1nh c\u1ea1nh nhau c\u00e1c \u0111\u01b0\u1eddng cong ng\u1eaft m\u1ea1ch Lo\u1ea1i B, C v\u00e0 D, l\u00e0m n\u1ed5i b\u1eadt c\u00e1c ng\u01b0\u1ee1ng ng\u1eaft t\u1eeb kh\u00e1c bi\u1ec7t cho c\u00e1c \u1ee9ng d\u1ee5ng t\u1ea3i kh\u00e1c nhau.<\/figcaption><\/figure>\n<h3>\u0110\u01b0\u1eddng Cong Lo\u1ea1i B: D\u00e2n D\u1ee5ng &amp; Th\u01b0\u01a1ng M\u1ea1i Nh\u1eb9<\/h3>\n<p><strong>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/strong>: 3-5\u00d7 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong>:<\/p>\n<ul>\n<li>\u00c1nh s\u00e1ng khu d\u00e2n c\u01b0 m\u1ea1ch<\/li>\n<li>\u1ed4 c\u1eafm \u0111a n\u0103ng<\/li>\n<li>Thi\u1ebft b\u1ecb nh\u1ecf c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng t\u1ed1i thi\u1ec3u<\/li>\n<li>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed c\u00f3 kh\u1edfi \u0111\u1ed9ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t<\/li>\n<\/ul>\n<p><strong>L\u1ee3i th\u1ebf<\/strong>:<\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 nhanh ch\u00f3ng cho t\u1ea3i \u0111i\u1ec7n tr\u1edf<\/li>\n<li>Ng\u0103n ng\u1eeba qu\u00e1 nhi\u1ec7t c\u00e1p trong c\u00e1c \u0111\u01b0\u1eddng ch\u1ea1y d\u00e0i<\/li>\n<li>Th\u00edch h\u1ee3p cho c\u00e1c c\u00e0i \u0111\u1eb7t m\u1ee9c s\u1ef1 c\u1ed1 th\u1ea5p<\/li>\n<\/ul>\n<p><strong>H\u1ea1n ch\u1ebf<\/strong>:<\/p>\n<ul>\n<li>C\u00f3 th\u1ec3 g\u00e2y ra ng\u1eaft m\u1ea1ch kh\u00f4ng c\u1ea7n thi\u1ebft v\u1edbi t\u1ea3i \u0111\u1ed9ng c\u01a1<\/li>\n<li>Kh\u00f4ng l\u00fd t\u01b0\u1edfng cho c\u00e1c m\u1ea1ch c\u00f3 d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng cao<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5<\/strong>: M\u1ed9t c\u1ea7u dao B16 s\u1ebd ng\u1eaft m\u1ea1ch t\u1ee9c th\u1eddi gi\u1eefa 48A-80A (3-5\u00d7 16A)<\/p>\n<hr \/>\n<h3>\u0110\u01b0\u1eddng Cong Lo\u1ea1i C: Ti\u00eau Chu\u1ea9n Th\u01b0\u01a1ng M\u1ea1i &amp; C\u00f4ng Nghi\u1ec7p<\/h3>\n<p><strong>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/strong>: 5-10\u00d7 d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong>:<\/p>\n<ul>\n<li>Chi\u1ebfu s\u00e1ng th\u01b0\u01a1ng m\u1ea1i (hu\u1ef3nh quang, tr\u00ecnh \u0111i\u1ec1u khi\u1ec3n LED)<\/li>\n<li>\u0110\u1ed9ng c\u01a1 nh\u1ecf \u0111\u1ebfn trung b\u00ecnh (HVAC, m\u00e1y b\u01a1m)<\/li>\n<li>M\u1ea1ch \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n b\u1eb1ng m\u00e1y bi\u1ebfn \u00e1p<\/li>\n<li>T\u1ea3i h\u1ed7n h\u1ee3p \u0111i\u1ec7n tr\u1edf-\u0111i\u1ec7n c\u1ea3m<\/li>\n<\/ul>\n<p><strong>L\u1ee3i th\u1ebf<\/strong>:<\/p>\n<ul>\n<li>Ch\u1ecbu \u0111\u01b0\u1ee3c d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng v\u1eeba ph\u1ea3i<\/li>\n<li>\u0110\u01b0\u1eddng cong linh ho\u1ea1t nh\u1ea5t cho m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng chung<\/li>\n<li>C\u00f3 s\u1eb5n r\u1ed9ng r\u00e3i v\u00e0 hi\u1ec7u qu\u1ea3 v\u1ec1 chi ph\u00ed<\/li>\n<\/ul>\n<p><strong>H\u1ea1n ch\u1ebf<\/strong>:<\/p>\n<ul>\n<li>C\u00f3 th\u1ec3 kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 cho c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ea1y c\u1ea3m<\/li>\n<li>Kh\u00f4ng \u0111\u1ee7 cho c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u1ed9ng c\u01a1 c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng cao<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5<\/strong>: M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch C20 s\u1ebd t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi trong kho\u1ea3ng 100A-200A (5-10 \u00d7 20A)<\/p>\n<hr \/>\n<h3>\u0110\u01b0\u1eddng cong lo\u1ea1i D: \u1ee8ng d\u1ee5ng d\u00f2ng kh\u1edfi \u0111\u1ed9ng cao<\/h3>\n<p><strong>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/strong>: 10-20 \u00d7 d\u00f2ng \u0111\u1ecbnh m\u1ee9c<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong>:<\/p>\n<ul>\n<li>\u0110\u1ed9ng c\u01a1 l\u1edbn kh\u1edfi \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp<\/li>\n<li>Thi\u1ebft b\u1ecb h\u00e0n<\/li>\n<li>M\u00e1y ch\u1ee5p X-quang<\/li>\n<li>M\u00e1y bi\u1ebfn \u00e1p c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng t\u1eeb h\u00f3a cao<\/li>\n<\/ul>\n<p><strong>L\u1ee3i th\u1ebf<\/strong>:<\/p>\n<ul>\n<li>Lo\u1ea1i b\u1ecf vi\u1ec7c t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/li>\n<li>X\u1eed l\u00fd d\u00f2ng \u0111i\u1ec7n qu\u00e1 \u0111\u1ed9 cao<\/li>\n<li>L\u00fd t\u01b0\u1edfng cho t\u1ea3i c\u00f4ng nghi\u1ec7p n\u1eb7ng<\/li>\n<\/ul>\n<p><strong>H\u1ea1n ch\u1ebf<\/strong>:<\/p>\n<ul>\n<li>Y\u00eau c\u1ea7u d\u00f2ng s\u1ef1 c\u1ed1 cao h\u01a1n \u0111\u1ec3 t\u00e1c \u0111\u1ed9ng nhanh ch\u00f3ng<\/li>\n<li>C\u00f3 th\u1ec3 kh\u00f4ng ph\u00f9 h\u1ee3p cho c\u00e1c \u0111\u01b0\u1eddng c\u00e1p d\u00e0i (d\u00f2ng s\u1ef1 c\u1ed1 kh\u00f4ng \u0111\u1ee7)<\/li>\n<li>Gi\u1ea3m \u0111\u1ed9 nh\u1ea1y b\u1ea3o v\u1ec7<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5<\/strong>: M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch D32 s\u1ebd t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi trong kho\u1ea3ng 320A-640A (10-20 \u00d7 32A)<\/p>\n<hr \/>\n<h3>\u0110\u01b0\u1eddng cong lo\u1ea1i K: M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1<\/h3>\n<p><strong>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/strong>: 8-12 \u00d7 d\u00f2ng \u0111\u1ecbnh m\u1ee9c<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong>:<\/p>\n<ul>\n<li>Trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1<\/li>\n<li>\u1ee8ng d\u1ee5ng d\u00f2ng kh\u1edfi \u0111\u1ed9ng trung b\u00ecnh<\/li>\n<li>M\u00e1y m\u00f3c c\u00f4ng nghi\u1ec7p c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng v\u1eeba ph\u1ea3i<\/li>\n<\/ul>\n<p><strong>L\u1ee3i th\u1ebf<\/strong>:<\/p>\n<ul>\n<li>T\u1ed1i \u01b0u h\u00f3a \u0111\u1ec3 b\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1<\/li>\n<li>Ph\u1ed1i h\u1ee3p t\u1ed1t h\u01a1n v\u1edbi b\u1ed9 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/li>\n<li>Gi\u1ea3m t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n so v\u1edbi lo\u1ea1i C<\/li>\n<\/ul>\n<p><strong>H\u1ea1n ch\u1ebf<\/strong>:<\/p>\n<ul>\n<li>\u00cdt ph\u1ed5 bi\u1ebfn h\u01a1n so v\u1edbi \u0111\u01b0\u1eddng cong B\/C\/D<\/li>\n<li>H\u1ea1n ch\u1ebf v\u1ec1 nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5<\/strong>: M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch K25 s\u1ebd t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi trong kho\u1ea3ng 200A-300A (8-12 \u00d7 25A)<\/p>\n<hr \/>\n<h3>\u0110\u01b0\u1eddng cong lo\u1ea1i Z: B\u1ea3o v\u1ec7 \u0111i\u1ec7n t\u1eed &amp; b\u00e1n d\u1eabn<\/h3>\n<p><strong>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/strong>: 2-3 \u00d7 d\u00f2ng \u0111\u1ecbnh m\u1ee9c<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng t\u1ed1t nh\u1ea5t<\/strong>:<\/p>\n<ul>\n<li>Ngu\u1ed3n \u0111i\u1ec7n PLC<\/li>\n<li>H\u1ec7 th\u1ed1ng \u0111i\u1ec7n DC<\/li>\n<li>M\u1ea1ch b\u00e1n d\u1eabn<\/li>\n<li>Thi\u1ebft b\u1ecb \u0111o \u0111\u1ea1c v\u00e0 \u0111i\u1ec1u khi\u1ec3n<\/li>\n<\/ul>\n<p><strong>L\u1ee3i th\u1ebf<\/strong>:<\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 c\u00f3 \u0111\u1ed9 nh\u1ea1y cao<\/li>\n<li>Ph\u1ea3n \u1ee9ng nhanh v\u1edbi d\u00f2ng qu\u00e1 t\u1ea3i nh\u1ecf<\/li>\n<li>B\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n t\u1eed tinh vi<\/li>\n<\/ul>\n<p><strong>H\u1ea1n ch\u1ebf<\/strong>:<\/p>\n<ul>\n<li>D\u1ec5 b\u1ecb t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n v\u1edbi b\u1ea5t k\u1ef3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng n\u00e0o<\/li>\n<li>Kh\u00f4ng ph\u00f9 h\u1ee3p cho t\u1ea3i \u0111\u1ed9ng c\u01a1 ho\u1eb7c m\u00e1y bi\u1ebfn \u00e1p<\/li>\n<li>Y\u00eau c\u1ea7u \u0111i\u1ec1u ki\u1ec7n t\u1ea3i r\u1ea5t \u1ed5n \u0111\u1ecbnh<\/li>\n<\/ul>\n<p><strong>V\u00ed d\u1ee5<\/strong>: M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch Z10 s\u1ebd t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi trong kho\u1ea3ng 20A-30A (2-3 \u00d7 10A)<\/p>\n<hr \/>\n<h2>B\u1ea3ng so s\u00e1nh \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng<\/h2>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>\u0110\u01b0\u1eddng Cong Lo\u1ea1i<\/th>\n<th>D\u1ea3i Ng\u1eaft T\u1eeb T\u00ednh<\/th>\n<th>T\u00e1c \u0111\u1ed9ng nhi\u1ec7t (1.45 \u00d7 In)<\/th>\n<th>T\u1ed1t nh\u1ea5t cho<\/th>\n<th>Tr\u00e1nh d\u00f9ng cho<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>Lo\u1ea1i Z<\/strong><\/td>\n<td>2-3 \u00d7 In<\/td>\n<td>1-2 gi\u1edd<\/td>\n<td>B\u00e1n d\u1eabn, PLC, ngu\u1ed3n DC<\/td>\n<td>\u0110\u1ed9ng c\u01a1, m\u00e1y bi\u1ebfn \u00e1p, b\u1ea5t k\u1ef3 t\u1ea3i n\u00e0o c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i B<\/strong><\/td>\n<td>3-5 \u00d7 In<\/td>\n<td>1-2 gi\u1edd<\/td>\n<td>\u00c1nh s\u00e1ng khu d\u00e2n c\u01b0 c\u1eeda h\u00e0ng gia d\u1ee5ng nh\u1ecf<\/td>\n<td>\u0110\u1ed9ng c\u01a1 kh\u1edfi \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp, thi\u1ebft b\u1ecb h\u00e0n<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i C<\/strong><\/td>\n<td>5-10 \u00d7 In<\/td>\n<td>1-2 gi\u1edd<\/td>\n<td>Chi\u1ebfu s\u00e1ng th\u01b0\u01a1ng m\u1ea1i, \u0111\u1ed9ng c\u01a1 nh\u1ecf, t\u1ea3i h\u1ed7n h\u1ee3p<\/td>\n<td>\u0110\u1ed9ng c\u01a1 l\u1edbn, thi\u1ebft b\u1ecb c\u00f3 d\u00f2ng kh\u1edfi \u0111\u1ed9ng cao<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i K<\/strong><\/td>\n<td>8-12 \u00d7 In<\/td>\n<td>1-2 gi\u1edd<\/td>\n<td>M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1, d\u00f2ng kh\u1edfi \u0111\u1ed9ng v\u1eeba ph\u1ea3i<\/td>\n<td>Thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed nh\u1ea1y c\u1ea3m, \u0111\u01b0\u1eddng c\u00e1p d\u00e0i<\/td>\n<\/tr>\n<tr>\n<td><strong>Lo\u1ea1i D<\/strong><\/td>\n<td>10-20 \u00d7 In<\/td>\n<td>1-2 gi\u1edd<\/td>\n<td>\u0110\u1ed9ng c\u01a1 l\u1edbn, h\u00e0n, m\u00e1y bi\u1ebfn \u00e1p<\/td>\n<td>H\u1ec7 th\u1ed1ng m\u1ee9c s\u1ef1 c\u1ed1 th\u1ea5p, t\u1ea3i nh\u1ea1y c\u1ea3m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>C\u00e1ch \u0111\u1ecdc bi\u1ec3u \u0111\u1ed3 \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng: H\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/Detailed-technical-diagram-of-Type-C-trip-curve-showing-thermal-and-magnetic-protection-zones-with-tolerance-bands-and-key-operating-points-for-VIOX-circuit-breakers.webp\" alt=\"Detailed technical diagram of Type C trip curve showing thermal and magnetic protection zones with tolerance bands\" \/><figcaption style=\"font-style: italic; color: #666; font-size: 0.9em; margin-top: 10px;\">H\u00ecnh 4: S\u01a1 \u0111\u1ed3 k\u1ef9 thu\u1eadt chi ti\u1ebft v\u1ec1 \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng lo\u1ea1i C hi\u1ec3n th\u1ecb c\u00e1c v\u00f9ng b\u1ea3o v\u1ec7 nhi\u1ec7t v\u00e0 t\u1eeb, d\u1ea3i dung sai v\u00e0 c\u00e1c \u0111i\u1ec3m v\u1eadn h\u00e0nh ch\u00ednh.<\/figcaption><\/figure>\n<h3>B\u01b0\u1edbc 1: Hi\u1ec3u c\u00e1c tr\u1ee5c<\/h3>\n<p><strong>Tr\u1ee5c X (Ngang)<\/strong>: D\u00f2ng \u0111i\u1ec7n theo b\u1ed9i s\u1ed1 c\u1ee7a d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c (In)<\/p>\n<ul>\n<li>V\u00ed d\u1ee5: \u0110\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft m\u1ea1ch 20A, \u201c5\u201d tr\u00ean tr\u1ee5c X = 100A (5 \u00d7 20A)<\/li>\n<li>Thang logarit cho ph\u00e9p ph\u1ea1m vi r\u1ed9ng (1 \u00d7 \u0111\u1ebfn 100 \u00d7 In)<\/li>\n<\/ul>\n<p><strong>Tr\u1ee5c Y (D\u1ecdc)<\/strong>: Th\u1eddi gian t\u00ednh b\u1eb1ng gi\u00e2y<\/p>\n<ul>\n<li>Thang logarit t\u1eeb 0,01 gi\u00e2y \u0111\u1ebfn 10.000 gi\u00e2y (2,77 gi\u1edd)<\/li>\n<li>Cho ph\u00e9p hi\u1ec3n th\u1ecb tr\u1ef1c quan c\u1ea3 b\u1ea3o v\u1ec7 t\u1ee9c th\u1eddi v\u00e0 b\u1ea3o v\u1ec7 d\u00e0i h\u1ea1n<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 2: X\u00e1c \u0111\u1ecbnh D\u1ea3i Dung Sai<\/h3>\n<p>\u0110\u01b0\u1eddng cong ng\u1eaft cho th\u1ea5y m\u1ed9t <strong>d\u1ea3i b\u00f3ng m\u1edd<\/strong> (kh\u00f4ng ph\u1ea3i m\u1ed9t \u0111\u01b0\u1eddng \u0111\u01a1n) v\u00ec:<\/p>\n<ul>\n<li>Dung sai s\u1ea3n xu\u1ea5t (th\u01b0\u1eddng l\u00e0 \u00b120%)<\/li>\n<li>Bi\u1ebfn \u0111\u1ed9ng nhi\u1ec7t \u0111\u1ed9<\/li>\n<li>L\u00e3o h\u00f3a linh ki\u1ec7n<\/li>\n<\/ul>\n<p><strong>Ranh gi\u1edbi tr\u00ean<\/strong>: Th\u1eddi gian t\u1ed1i \u0111a tr\u01b0\u1edbc khi \u0111\u1ea3m b\u1ea3o ng\u1eaft<br \/>\n<strong>Ranh gi\u1edbi d\u01b0\u1edbi<\/strong>: Th\u1eddi gian t\u1ed1i thi\u1ec3u tr\u01b0\u1edbc khi c\u00f3 th\u1ec3 ng\u1eaft<\/p>\n<h3>B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh \u0110i\u1ec3m V\u1eadn H\u00e0nh c\u1ee7a B\u1ea1n<\/h3>\n<ol>\n<li>T\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n d\u1ef1 ki\u1ebfn c\u1ee7a b\u1ea1n theo b\u1ed9i s\u1ed1 c\u1ee7a In<\/li>\n<li>V\u1ebd m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng t\u1eeb \u0111i\u1ec3m \u0111\u00f3 tr\u00ean tr\u1ee5c X<\/li>\n<li>T\u1ea1i n\u01a1i n\u00f3 giao v\u1edbi d\u1ea3i \u0111\u01b0\u1eddng cong ng\u1eaft, v\u1ebd m\u1ed9t \u0111\u01b0\u1eddng n\u1eb1m ngang \u0111\u1ebfn tr\u1ee5c Y<\/li>\n<li>\u0110\u1ecdc ph\u1ea1m vi th\u1eddi gian ng\u1eaft<\/li>\n<\/ol>\n<p><strong>V\u00ed d\u1ee5<\/strong>: \u0110\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft C20 v\u1edbi d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 80A:<\/p>\n<ul>\n<li>80A \u00f7 20A = 4 \u00d7 In<\/li>\n<li>T\u1ea1i 4 \u00d7 In, v\u00f9ng nhi\u1ec7t cho th\u1ea5y th\u1eddi gian ng\u1eaft l\u00e0 10-100 gi\u00e2y<\/li>\n<li>T\u1ea1i 100A (5 \u00d7 In), ng\u1eaft t\u1eeb b\u1eaft \u0111\u1ea7u (0,01-0,1 gi\u00e2y)<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: \u00c1p d\u1ee5ng C\u00e1c \u0110i\u1ec1u Ch\u1ec9nh M\u00f4i Tr\u01b0\u1eddng<\/h3>\n<p><strong>T\u00e1c \u0111\u1ed9ng c\u1ee7a nhi\u1ec7t \u0111\u1ed9<\/strong>:<\/p>\n<ul>\n<li>Hi\u1ec7u chu\u1ea9n ti\u00eau chu\u1ea9n: 30\u00b0C (B\/C\/D) ho\u1eb7c 20\u00b0C (K\/Z)<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao h\u01a1n = ng\u1eaft nhanh h\u01a1n (l\u01b0\u1ee1ng kim \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng tr\u01b0\u1edbc)<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng th\u1ea5p h\u01a1n = ng\u1eaft ch\u1eadm h\u01a1n<\/li>\n<li>C\u00e1c h\u1ec7 s\u1ed1 \u0111i\u1ec1u ch\u1ec9nh c\u00f3 s\u1eb5n trong b\u1ea3ng d\u1eef li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<\/ul>\n<p><strong>\u1ea2nh h\u01b0\u1edfng c\u1ee7a \u0110\u1ed9 cao<\/strong>:<\/p>\n<ul>\n<li>Tr\u00ean 2000m, m\u1eadt \u0111\u1ed9 kh\u00f4ng kh\u00ed gi\u1ea3m<\/li>\n<li>Kh\u1ea3 n\u0103ng d\u1eadp h\u1ed3 quang tr\u1edf n\u00ean k\u00e9m hi\u1ec7u qu\u1ea3 h\u01a1n<\/li>\n<li>Gi\u1ea3m \u0111\u1ecbnh m\u1ee9c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c y\u00eau c\u1ea7u theo IEC 60947-2<\/li>\n<\/ul>\n<hr \/>\n<h2>L\u1ef1a ch\u1ecdn \u0110\u01b0\u1eddng Cong Ng\u1eaft: Khung Quy\u1ebft \u0110\u1ecbnh Th\u1ef1c T\u1ebf<\/h2>\n<h3>B\u01b0\u1edbc 1: X\u00e1c \u0111\u1ecbnh Lo\u1ea1i T\u1ea3i c\u1ee7a B\u1ea1n<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Lo\u1ea1i t\u1ea3i<\/th>\n<th>\u0110\u1eb7c t\u00ednh D\u00f2ng Kh\u1edfi \u0110\u1ed9ng<\/th>\n<th>\u0110\u01b0\u1eddng Cong \u0110\u01b0\u1ee3c \u0110\u1ec1 Xu\u1ea5t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Thu\u1ea7n tr\u1edf (m\u00e1y s\u01b0\u1edfi, \u0111\u00e8n s\u1ee3i \u0111\u1ed1t)<\/td>\n<td>T\u1ed1i thi\u1ec3u (1-1,2 \u00d7 In)<\/td>\n<td>B ho\u1eb7c C<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec7n t\u1eed (LED, b\u1ed9 ngu\u1ed3n)<\/td>\n<td>Th\u1ea5p \u0111\u1ebfn trung b\u00ecnh (2-3 \u00d7 In)<\/td>\n<td>B ho\u1eb7c Z<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9ng c\u01a1 nh\u1ecf (&lt;5 HP)<\/td>\n<td>Trung b\u00ecnh (5-8 \u00d7 In)<\/td>\n<td>C<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9ng c\u01a1 l\u1edbn (&gt;5 HP)<\/td>\n<td>Cao (8-12 \u00d7 In)<\/td>\n<td>D ho\u1eb7c K<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y bi\u1ebfn \u00e1p<\/td>\n<td>R\u1ea5t cao (10-15 \u00d7 In)<\/td>\n<td>D<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb h\u00e0n<\/td>\n<td>C\u1ef1c \u0111oan (15-20 \u00d7 In)<\/td>\n<td>D<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>B\u01b0\u1edbc 2: T\u00ednh to\u00e1n D\u00f2ng \u0110i\u1ec7n S\u1ef1 C\u1ed1 Kh\u1ea3 D\u1ee5ng<\/h3>\n<p><strong>T\u1ea1i sao n\u00f3 quan tr\u1ecdng<\/strong>: C\u00e1c \u0111\u01b0\u1eddng cong ng\u1eaft cao h\u01a1n (D, K) y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 cao h\u01a1n \u0111\u1ec3 ng\u1eaft trong gi\u1edbi h\u1ea1n th\u1eddi gian theo quy \u0111\u1ecbnh.<\/p>\n<p><strong>C\u00f4ng th\u1ee9c<\/strong> (\u0111\u01a1n gi\u1ea3n h\u00f3a m\u1ed9t pha):<\/p>\n<pre><code>Isc = V \/ (Zsource + Zcable)<\/code><\/pre>\n<p><strong>Y\u00eau C\u1ea7u \u0111\u01b0\u1ee3c ...<\/strong>:<\/p>\n<ul>\n<li>D\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 ph\u1ea3i \u0111\u1ee7 \u0111\u1ec3 ng\u1eaft b\u1ed9 ng\u1eaft trong v\u00f2ng 0,4 gi\u00e2y (120V) ho\u1eb7c 5 gi\u00e2y (240V)<\/li>\n<li>X\u00e1c minh b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng \u0111\u01b0\u1eddng cong ng\u1eaft c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 \u0111\u00e3 t\u00ednh to\u00e1n<\/li>\n<\/ul>\n<p><strong>V\u1ea5n \u0111\u1ec1 Th\u01b0\u1eddng G\u1eb7p<\/strong>: C\u00e1c \u0111\u01b0\u1eddng c\u00e1p d\u00e0i \u0111\u1ebfn b\u1ed9 ng\u1eaft \u0111\u01b0\u1eddng cong D c\u00f3 th\u1ec3 kh\u00f4ng t\u1ea1o ra \u0111\u1ee7 d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 \u0111\u1ec3 ng\u1eaft nhanh.<\/p>\n<h3>B\u01b0\u1edbc 3: X\u00e1c minh B\u1ea3o v\u1ec7 D\u00e2y D\u1eabn<\/h3>\n<p><strong>NEC 240.4(D)<\/strong>: Thi\u1ebft b\u1ecb qu\u00e1 d\u00f2ng ph\u1ea3i b\u1ea3o v\u1ec7 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn<\/p>\n<p><strong>Ki\u1ec3m Tra<\/strong>:<\/p>\n<ol>\n<li>Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn (t\u1eeb B\u1ea3ng NEC 310.16, c\u00f3 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c)<\/li>\n<li>\u0110i\u1ec3m ng\u1eaft nhi\u1ec7t c\u1ee7a b\u1ed9 ng\u1eaft (1,45 \u00d7 In \u0111\u1ed1i v\u1edbi b\u1ed9 ng\u1eaft th\u00f4ng th\u01b0\u1eddng)<\/li>\n<li>\u0110\u1ea3m b\u1ea3o: Breaker In \u2264 Kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn<\/li>\n<\/ol>\n<p><strong>V\u00ed d\u1ee5<\/strong>:<\/p>\n<ul>\n<li>D\u00e2y \u0111\u1ed3ng 12 AWG (kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i 20A \u1edf 60\u00b0C)<\/li>\n<li>B\u1ed9 ng\u1eaft t\u1ed1i \u0111a: 20A<\/li>\n<li>T\u1ea1i 1,45 \u00d7 In = 29A, ph\u1ea3i ng\u1eaft trong v\u00f2ng 1 gi\u1edd<\/li>\n<li>D\u00e2y d\u1eabn c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c 29A trong 1 gi\u1edd theo NEC<\/li>\n<\/ul>\n<h3>B\u01b0\u1edbc 4: Ph\u1ed1i h\u1ee3p v\u1edbi c\u00e1c thi\u1ebft b\u1ecb \u1edf ngu\u1ed3n tr\u00ean<\/h3>\n<p><strong>Ph\u1ed1i h\u1ee3p c\u00f3 ch\u1ecdn l\u1ecdc<\/strong>: Aptomat \u1edf ph\u00eda t\u1ea3i s\u1ef1 c\u1ed1 tr\u01b0\u1edbc aptomat \u1edf ph\u00eda ngu\u1ed3n<\/p>\n<p><strong>Y\u00eau c\u1ea7u<\/strong>:<\/p>\n<ul>\n<li>NEC 700.27: H\u1ec7 th\u1ed1ng kh\u1ea9n c\u1ea5p<\/li>\n<li>NEC 701.27: D\u1ef1 ph\u00f2ng theo y\u00eau c\u1ea7u ph\u00e1p l\u00fd<\/li>\n<li>NEC 708.54: H\u1ec7 th\u1ed1ng \u0111i\u1ec7n cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng quan tr\u1ecdng<\/li>\n<\/ul>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p<\/strong>:<\/p>\n<ol>\n<li>V\u1ebd c\u1ea3 hai \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh t\u00e1c \u0111\u1ed9ng l\u00ean c\u00f9ng m\u1ed9t \u0111\u1ed3 th\u1ecb<\/li>\n<li>X\u00e1c minh \u0111\u01b0\u1eddng cong ph\u00eda t\u1ea3i n\u1eb1m ho\u00e0n to\u00e0n d\u01b0\u1edbi \u0111\u01b0\u1eddng cong ph\u00eda ngu\u1ed3n<\/li>\n<li>Kho\u1ea3ng c\u00e1ch t\u1ed1i thi\u1ec3u: 0.1-0.2 gi\u00e2y \u1edf t\u1ea5t c\u1ea3 c\u00e1c m\u1ee9c d\u00f2ng \u0111i\u1ec7n<\/li>\n<\/ol>\n<hr \/>\n<h2>C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p v\u1ec1 \u0111\u01b0\u1eddng cong chuy\u1ebfn \u0111i v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<h3>V\u1ea5n \u0111\u1ec1 1: T\u00e1c \u0111\u1ed9ng c\u1eaft kh\u00f4ng mong mu\u1ed1n trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/h3>\n<p><strong>Tri\u1ec7u ch\u1ee9ng<\/strong>:<\/p>\n<ul>\n<li>Aptomat t\u00e1c \u0111\u1ed9ng khi \u0111\u1ed9ng c\u01a1 kh\u1edfi \u0111\u1ed9ng<\/li>\n<li>Thi\u1ebft b\u1ecb ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng sau khi kh\u1edfi \u0111\u1ed9ng l\u1ea1i<\/li>\n<li>X\u1ea3y ra th\u01b0\u1eddng xuy\u00ean h\u01a1n trong th\u1eddi ti\u1ebft n\u00f3ng<\/li>\n<\/ul>\n<p><strong>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/strong>:<\/p>\n<ul>\n<li>\u0110\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng qu\u00e1 nh\u1ea1y (Lo\u1ea1i B tr\u00ean t\u1ea3i \u0111\u1ed9ng c\u01a1)<\/li>\n<li>Aptomat c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00f4ng \u0111\u1ee7 cho d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng cao l\u00e0m n\u00f3ng tr\u01b0\u1edbc ph\u1ea7n t\u1eed nhi\u1ec7t<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p<\/strong>:<\/p>\n<ol>\n<li><strong>N\u00e2ng c\u1ea5p l\u00ean \u0111\u01b0\u1eddng cong cao h\u01a1n<\/strong>: B \u2192 C ho\u1eb7c C \u2192 D<\/li>\n<li><strong>X\u00e1c minh d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/strong>: \u0110o b\u1eb1ng ampe k\u00ecm trong qu\u00e1 tr\u00ecnh kh\u1edfi \u0111\u1ed9ng<\/li>\n<li><strong>Ki\u1ec3m tra nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng<\/strong>: L\u1eafp \u0111\u1eb7t aptomat \u1edf v\u1ecb tr\u00ed m\u00e1t h\u01a1n ho\u1eb7c s\u1eed d\u1ee5ng th\u00f4ng gi\u00f3 c\u01b0\u1ee1ng b\u1ee9c<\/li>\n<li><strong>C\u00e2n nh\u1eafc s\u1eed d\u1ee5ng b\u1ed9 kh\u1edfi \u0111\u1ed9ng m\u1ec1m<\/strong>: Gi\u1ea3m d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng, cho ph\u00e9p \u0111\u01b0\u1eddng cong th\u1ea5p h\u01a1n<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 2: Aptomat kh\u00f4ng t\u00e1c \u0111\u1ed9ng khi c\u00f3 s\u1ef1 c\u1ed1<\/h3>\n<p><strong>Tri\u1ec7u ch\u1ee9ng<\/strong>:<\/p>\n<ul>\n<li>Aptomat \u1edf ngu\u1ed3n tr\u00ean t\u00e1c \u0111\u1ed9ng thay v\u00ec aptomat \u1edf ph\u00eda t\u1ea3i<\/li>\n<li>D\u00e2y d\u1eabn qu\u00e1 n\u00f3ng tr\u01b0\u1edbc khi aptomat t\u00e1c \u0111\u1ed9ng<\/li>\n<li>S\u1ef1 c\u1ed1 h\u1ed3 quang \u0111i\u1ec7n v\u1edbi th\u1eddi gian c\u1eaft ch\u1eadm<\/li>\n<\/ul>\n<p><strong>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/strong>:<\/p>\n<ul>\n<li>D\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea1t \u0111\u1ebfn v\u00f9ng t\u00e1c \u0111\u1ed9ng t\u1eeb<\/li>\n<li>\u0110\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng qu\u00e1 cao so v\u1edbi d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 c\u00f3 s\u1eb5n<\/li>\n<li>Chi\u1ec1u d\u00e0i c\u00e1p d\u00e0i l\u00e0m t\u0103ng tr\u1edf kh\u00e1ng<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p<\/strong>:<\/p>\n<ol>\n<li><strong>T\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 th\u1ef1c t\u1ebf<\/strong>: S\u1eed d\u1ee5ng tr\u1edf kh\u00e1ng h\u1ec7 th\u1ed1ng v\u00e0 chi\u1ec1u d\u00e0i c\u00e1p<\/li>\n<li><strong>H\u1ea1 c\u1ea5p \u0111\u01b0\u1eddng cong n\u1ebfu c\u00f3 th\u1ec3<\/strong>: D \u2192 C ho\u1eb7c C \u2192 B (n\u1ebfu d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng cho ph\u00e9p)<\/li>\n<li><strong>T\u0103ng k\u00edch th\u01b0\u1edbc d\u00e2y d\u1eabn<\/strong>: Gi\u1ea3m tr\u1edf kh\u00e1ng, t\u0103ng d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1<\/li>\n<li><strong>L\u1eafp \u0111\u1eb7t g\u1ea7n ngu\u1ed3n h\u01a1n<\/strong>: Gi\u1ea3m tr\u1edf kh\u00e1ng c\u00e1p<\/li>\n<\/ol>\n<h3>V\u1ea5n \u0111\u1ec1 3: Thi\u1ebfu ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc<\/h3>\n<p><strong>Tri\u1ec7u ch\u1ee9ng<\/strong>:<\/p>\n<ul>\n<li>C\u1ea3 aptomat \u1edf ngu\u1ed3n tr\u00ean v\u00e0 ph\u00eda t\u1ea3i \u0111\u1ec1u t\u00e1c \u0111\u1ed9ng<\/li>\n<li>To\u00e0n b\u1ed9 t\u1ee7 \u0111i\u1ec7n m\u1ea5t \u0111i\u1ec7n thay v\u00ec ch\u1ec9 m\u1ed9t m\u1ea1ch<\/li>\n<li>Kh\u00f3 x\u00e1c \u0111\u1ecbnh m\u1ea1ch b\u1ecb s\u1ef1 c\u1ed1<\/li>\n<\/ul>\n<p><strong>Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/strong>:<\/p>\n<ul>\n<li>C\u00e1c \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng ch\u1ed3ng l\u00ean nhau \u1edf c\u00e1c m\u1ee9c d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1<\/li>\n<li>Kh\u00f4ng \u0111\u1ee7 kho\u1ea3ng th\u1eddi gian gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb<\/li>\n<li>C\u1ea3 hai aptomat \u0111\u1ec1u \u1edf v\u00f9ng t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi<\/li>\n<\/ul>\n<p><strong>Gi\u1ea3i ph\u00e1p<\/strong>:<\/p>\n<ol>\n<li><strong>S\u1eed d\u1ee5ng b\u1ea3ng ph\u1ed1i h\u1ee3p<\/strong>: D\u1eef li\u1ec7u ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc do nh\u00e0 s\u1ea3n xu\u1ea5t cung c\u1ea5p<\/li>\n<li><strong>T\u0103ng \u0111\u01b0\u1eddng cong aptomat \u1edf ngu\u1ed3n tr\u00ean<\/strong>: C \u2192 D (n\u1ebfu t\u1ea3i cho ph\u00e9p)<\/li>\n<li><strong>Th\u00eam th\u1eddi gian tr\u1ec5<\/strong>: S\u1eed d\u1ee5ng b\u1ed9 t\u00e1c \u0111\u1ed9ng \u0111i\u1ec7n t\u1eed v\u1edbi \u0111\u1ed9 tr\u1ec5 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/li>\n<li><strong>L\u1eafp \u0111\u1eb7t aptomat h\u1ea1n ch\u1ebf d\u00f2ng \u0111i\u1ec7n<\/strong>: Gi\u1ea3m n\u0103ng l\u01b0\u1ee3ng th\u00f4ng qua<\/li>\n<\/ol>\n<hr \/>\n<h2>\u0110\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng cho MCB so v\u1edbi RCBO: C\u00e1c \u0111i\u1ec3m kh\u00e1c bi\u1ec7t ch\u00ednh<\/h2>\n<h3><a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">MCB (M\u00e1y c\u1eaft m\u1ea1ch thu nh\u1ecf)<\/a><\/h3>\n<p><strong>S\u1ef1 b\u1ea3o v\u1ec7<\/strong>: Ch\u1ec9 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng (nhi\u1ec7t + t\u1eeb)<\/p>\n<p><strong>\u0110\u01b0\u1eddng cong chuy\u1ebfn \u0111i<\/strong>: B, C, D, K, Z (nh\u01b0 m\u00f4 t\u1ea3 \u1edf tr\u00ean)<\/p>\n<p><strong>Ti\u00eau chu\u1ea9n<\/strong>: IEC 60898-1, UL 489<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng<\/strong>: B\u1ea3o v\u1ec7 m\u1ea1ch \u0111i\u1ec7n n\u00f3i chung m\u00e0 kh\u00f4ng c\u00f3 b\u1ea3o v\u1ec7 ch\u1ed1ng d\u00f2ng r\u00f2<\/p>\n<h3>RCBO (Aptomat ch\u1ed1ng d\u00f2ng r\u00f2 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng)<\/h3>\n<p><strong>S\u1ef1 b\u1ea3o v\u1ec7<\/strong>: Qu\u00e1 d\u00f2ng + d\u00f2ng d\u01b0 (s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t)<\/p>\n<p><strong>\u0110\u01b0\u1eddng cong chuy\u1ebfn \u0111i<\/strong>:<\/p>\n<ul>\n<li><strong>Qu\u00e1 d\u00f2ng<\/strong>: C\u00e1c \u0111\u01b0\u1eddng cong B\/C\/D gi\u1ed1ng nh\u01b0 MCB<\/li>\n<li><strong>D\u00f2ng d\u01b0<\/strong>: \u0110\u1ed9 nh\u1ea1y b\u1ed5 sung (10mA, 30mA, 100mA, 300mA)<\/li>\n<\/ul>\n<p><strong>Ti\u00eau chu\u1ea9n<\/strong>: IEC 61009-1, UL 943<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng<\/strong>: B\u1ea3o v\u1ec7 k\u1ebft h\u1ee3p khi c\u1ea7n c\u1ea3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt<\/p>\n<p><strong>IEC 60898-1 (MCB \u2013 D\u00e2n d\u1ee5ng)<\/strong>: Bi\u1ec3u \u0111\u1ed3 \u0111\u01b0\u1eddng cong ng\u1eaft c\u1ee7a RCBO cho th\u1ea5y <strong>hai \u0111\u01b0\u1eddng cong ri\u00eang bi\u1ec7t<\/strong>:<\/p>\n<ol>\n<li>\u0110\u01b0\u1eddng cong qu\u00e1 d\u00f2ng (nhi\u1ec7t-t\u1eeb, t\u01b0\u01a1ng t\u1ef1 nh\u01b0 MCB)<\/li>\n<li>\u0110\u01b0\u1eddng cong d\u00f2ng d\u01b0 (th\u01b0\u1eddng ng\u1eaft trong 0,04-0,3 gi\u00e2y \u1edf I\u0394n \u0111\u1ecbnh m\u1ee9c)<\/li>\n<\/ol>\n<p><strong>M\u1eb9o l\u1ef1a ch\u1ecdn<\/strong>: Ch\u1ecdn lo\u1ea1i \u0111\u01b0\u1eddng cong RCBO (B\/C\/D) d\u1ef1a tr\u00ean d\u00f2ng kh\u1edfi \u0111\u1ed9ng c\u1ee7a t\u1ea3i, sau \u0111\u00f3 ch\u1ecdn \u0111\u1ed9 nh\u1ea1y d\u00f2ng d\u01b0 d\u1ef1a tr\u00ean \u1ee9ng d\u1ee5ng:<\/p>\n<ul>\n<li><strong>10mA<\/strong>: Thi\u1ebft b\u1ecb y t\u1ebf<\/li>\n<li><strong>30mA<\/strong>: B\u1ea3o v\u1ec7 con ng\u01b0\u1eddi (NEC 210.8)<\/li>\n<li><strong>100-300mA<\/strong>: B\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb, ph\u00f2ng ch\u1ed1ng ch\u00e1y n\u1ed5<\/li>\n<\/ul>\n<hr \/>\n<h2>Ti\u00eau chu\u1ea9n v\u00e0 Ch\u1ee9ng nh\u1eadn \u0110\u01b0\u1eddng cong Ng\u1eaft<\/h2>\n<h3>Ti\u00eau chu\u1ea9n IEC (Qu\u1ed1c t\u1ebf)<\/h3>\n<p><strong>IEC 60898-1<\/strong>: Aptomat b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng cho c\u00e1c \u1ee9ng d\u1ee5ng gia \u0111\u00ecnh v\u00e0 t\u01b0\u01a1ng t\u1ef1<\/p>\n<ul>\n<li>X\u00e1c \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1eddng cong B, C, D<\/li>\n<li>Ch\u1ec9 \u0111\u1ecbnh c\u00e1c d\u1ea3i dung sai v\u00e0 quy tr\u00ecnh ki\u1ec3m tra<\/li>\n<li>Nhi\u1ec7t \u0111\u1ed9 tham chi\u1ebfu: 30\u00b0C<\/li>\n<\/ul>\n<p><strong>TRUY\u1ec0N th\u00f4ng 60947-2<\/strong>: Thi\u1ebft b\u1ecb \u0111\u00f3ng c\u1eaft v\u00e0 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n h\u1ea1 th\u1ebf - Aptomat<\/p>\n<ul>\n<li>Bao g\u1ed3m MCCB v\u00e0 aptomat c\u00f4ng nghi\u1ec7p<\/li>\n<li>X\u00e1c \u0111\u1ecbnh c\u00e1c lo\u1ea1i s\u1eed d\u1ee5ng (A, B, C)<\/li>\n<li>\u0110\u1eb7c t\u00ednh ng\u1eaft linh ho\u1ea1t h\u01a1n so v\u1edbi 60898-1<\/li>\n<\/ul>\n<p><strong>IEC 61009-1<\/strong>: Aptomat d\u00f2ng d\u01b0 c\u00f3 b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng t\u00edch h\u1ee3p (RCBO)<\/p>\n<ul>\n<li>K\u1ebft h\u1ee3p b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng v\u00e0 d\u00f2ng d\u01b0<\/li>\n<li>Tham chi\u1ebfu IEC 60898-1 cho c\u00e1c \u0111\u01b0\u1eddng cong qu\u00e1 d\u00f2ng<\/li>\n<\/ul>\n<h3>Ti\u00eau chu\u1ea9n UL (B\u1eafc M\u1ef9)<\/h3>\n<p><strong>UL 489<\/strong>: Aptomat v\u1ecf \u0111\u00fac<\/p>\n<ul>\n<li>Ti\u00eau chu\u1ea9n ch\u00ednh cho aptomat B\u1eafc M\u1ef9<\/li>\n<li>\u0110\u1eb7c t\u00ednh ng\u1eaft kh\u00e1c v\u1edbi IEC (kh\u00f4ng c\u00f3 k\u00fd hi\u1ec7u B\/C\/D)<\/li>\n<li>Ch\u1ec9 \u0111\u1ecbnh d\u00f2ng hi\u1ec7u chu\u1ea9n v\u00e0 d\u1ea3i th\u1eddi gian<\/li>\n<\/ul>\n<p><strong>Ti\u00eau chu\u1ea9n UL1077<\/strong>: Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 b\u1ed5 sung<\/p>\n<ul>\n<li>Kh\u00f4ng ph\u1ea3i l\u00e0 aptomat \u0111\u1ea7y \u0111\u1ee7 (kh\u00f4ng th\u1ec3 s\u1eed d\u1ee5ng l\u00e0m thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch ch\u00ednh)<\/li>\n<li>Th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u1ee7 \u0111i\u1ec1u khi\u1ec3n v\u00e0 thi\u1ebft b\u1ecb<\/li>\n<li>Ki\u1ec3m tra \u00edt nghi\u00eam ng\u1eb7t h\u01a1n so v\u1edbi UL 489<\/li>\n<\/ul>\n<p><strong>Ti\u00eau chu\u1ea9n UL943<\/strong>: B\u1ed9 ng\u1eaft m\u1ea1ch khi c\u00f3 s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t<\/p>\n<ul>\n<li>Bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb GFCI v\u00e0 RCBO<\/li>\n<li>Ch\u1ec9 \u0111\u1ecbnh c\u00e1c \u0111\u1eb7c t\u00ednh ng\u1eaft khi c\u00f3 s\u1ef1 c\u1ed1 ch\u1ea1m \u0111\u1ea5t<\/li>\n<\/ul>\n<h3>Y\u00eau c\u1ea7u c\u1ee7a NEC (B\u1eafc M\u1ef9)<\/h3>\n<p><strong>NEC 240.6<\/strong>: \u0110\u1ecbnh m\u1ee9c ampe ti\u00eau chu\u1ea9n cho c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/p>\n<p><strong>NEC 240.4<\/strong>: B\u1ea3o v\u1ec7 d\u00e2y d\u1eabn (aptomat ph\u1ea3i b\u1ea3o v\u1ec7 kh\u1ea3 n\u0103ng ch\u1ecbu t\u1ea3i c\u1ee7a d\u00e2y d\u1eabn)<\/p>\n<p><strong>\u0110\u01af\u1ee2C ... 110.9<\/strong>: Kh\u1ea3 n\u0103ng c\u1eaft (aptomat ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng c\u1eaft ng\u1eafn m\u1ea1ch ph\u00f9 h\u1ee3p)<\/p>\n<p><strong>NEC 240.12<\/strong>: Ph\u1ed1i h\u1ee3p h\u1ec7 th\u1ed1ng \u0111i\u1ec7n (ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc cho c\u00e1c h\u1ec7 th\u1ed1ng quan tr\u1ecdng)<\/p>\n<hr \/>\n<h2>H\u01b0\u1edbng d\u1eabn Tham kh\u1ea3o Nhanh v\u1ec1 L\u1ef1a ch\u1ecdn \u0110\u01b0\u1eddng cong Ng\u1eaft<\/h2>\n<h3>\u1ee8ng d\u1ee5ng d\u00e2n d\u1ee5ng<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Lo\u1ea1i m\u1ea1ch<\/th>\n<th>T\u1ea3i \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>\u0110\u01b0\u1eddng Cong \u0110\u01b0\u1ee3c \u0110\u1ec1 Xu\u1ea5t<\/th>\n<th>K\u00edch th\u01b0\u1edbc m\u00e1y c\u1eaft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chi\u1ebfu s\u00e1ng<\/td>\n<td>\u0110\u00e8n LED, s\u1ee3i \u0111\u1ed1t, hu\u1ef3nh quang<\/td>\n<td><strong>B ho\u1eb7c C<\/strong><\/td>\n<td>15-20A<\/td>\n<\/tr>\n<tr>\n<td>C\u1eeda h\u00e0ng t\u1ed5ng h\u1ee3p<\/td>\n<td>Thi\u1ebft b\u1ecb, \u0111i\u1ec7n t\u1eed<\/td>\n<td><strong>B ho\u1eb7c C<\/strong><\/td>\n<td>15-20A<\/td>\n<\/tr>\n<tr>\n<td>\u1ed4 c\u1eafm nh\u00e0 b\u1ebfp<\/td>\n<td>L\u00f2 vi s\u00f3ng, l\u00f2 n\u01b0\u1edbng b\u00e1nh m\u00ec, m\u00e1y pha c\u00e0 ph\u00ea<\/td>\n<td><strong>C<\/strong><\/td>\n<td>20A<\/td>\n<\/tr>\n<tr>\n<td>\u1ed4 c\u1eafm ph\u00f2ng t\u1eafm<\/td>\n<td>M\u00e1y s\u1ea5y t\u00f3c, dao c\u1ea1o \u0111i\u1ec7n<\/td>\n<td><strong>B ho\u1eb7c C<\/strong><\/td>\n<td>20A (y\u00eau c\u1ea7u GFCI\/RCBO)<\/td>\n<\/tr>\n<tr>\n<td>\u0110i\u1ec1u h\u00f2a kh\u00f4ng kh\u00ed<\/td>\n<td>\u0110i\u1ec1u h\u00f2a trung t\u00e2m, b\u01a1m nhi\u1ec7t<\/td>\n<td><strong>C ho\u1eb7c D<\/strong><\/td>\n<td>Theo nh\u00e3n m\u00e1c thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td>B\u1ebfp \u0111i\u1ec7n<\/td>\n<td>B\u1ebfp n\u1ea5u, l\u00f2 n\u01b0\u1edbng<\/td>\n<td><strong>C<\/strong><\/td>\n<td>40-50A<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y s\u1ea5y qu\u1ea7n \u00e1o<\/td>\n<td>M\u00e1y s\u1ea5y \u0111i\u1ec7n<\/td>\n<td><strong>C<\/strong><\/td>\n<td>30A<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y n\u01b0\u1edbc n\u00f3ng<\/td>\n<td>\u0110i\u1ec7n tr\u1edf<\/td>\n<td><strong>C<\/strong><\/td>\n<td>20-30A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng d\u1ee5ng th\u01b0\u01a1ng m\u1ea1i<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Lo\u1ea1i m\u1ea1ch<\/th>\n<th>T\u1ea3i \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>\u0110\u01b0\u1eddng Cong \u0110\u01b0\u1ee3c \u0110\u1ec1 Xu\u1ea5t<\/th>\n<th>K\u00edch th\u01b0\u1edbc m\u00e1y c\u1eaft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chi\u1ebfu s\u00e1ng v\u0103n ph\u00f2ng<\/td>\n<td>\u0110\u00e8n hu\u1ef3nh quang, t\u1ea5m LED<\/td>\n<td><strong>C<\/strong><\/td>\n<td>15-20A<\/td>\n<\/tr>\n<tr>\n<td>\u1ed4 c\u1eafm v\u0103n ph\u00f2ng<\/td>\n<td>M\u00e1y t\u00ednh, m\u00e1y in<\/td>\n<td><strong>B ho\u1eb7c C<\/strong><\/td>\n<td>20A<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb HVAC<\/td>\n<td>C\u1ee5m tr\u00ean m\u00e1i, b\u1ed9 x\u1eed l\u00fd kh\u00f4ng kh\u00ed<\/td>\n<td><strong>C ho\u1eb7c D<\/strong><\/td>\n<td>M\u1ed7i thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9ng c\u01a1 thang m\u00e1y<\/td>\n<td>Thang m\u00e1y k\u00e9o<\/td>\n<td><strong>D<\/strong><\/td>\n<td>Theo quy \u0111\u1ecbnh v\u1ec1 thang m\u00e1y<\/td>\n<\/tr>\n<tr>\n<td>B\u1ebfp th\u01b0\u01a1ng m\u1ea1i<\/td>\n<td>L\u00f2 n\u01b0\u1edbng, n\u1ed3i chi\u00ean, m\u00e1y r\u1eeda ch\u00e9n<\/td>\n<td><strong>C<\/strong><\/td>\n<td>20-60A<\/td>\n<\/tr>\n<tr>\n<td>L\u00e0m l\u1ea1nh<\/td>\n<td>T\u1ee7 l\u00e0m m\u00e1t c\u1ee1 l\u1edbn, t\u1ee7 \u0111\u00f4ng<\/td>\n<td><strong>C<\/strong><\/td>\n<td>15-30A<\/td>\n<\/tr>\n<tr>\n<td>Trung t\u00e2m d\u1eef li\u1ec7u<\/td>\n<td>Gi\u00e1 \u0111\u1ee1 m\u00e1y ch\u1ee7, h\u1ec7 th\u1ed1ng UPS<\/td>\n<td><strong>C<\/strong><\/td>\n<td>20-60A<\/td>\n<\/tr>\n<tr>\n<td>Chi\u1ebfu s\u00e1ng b\u00e1n l\u1ebb<\/td>\n<td>\u0110\u00e8n ray, tr\u01b0ng b\u00e0y<\/td>\n<td><strong>C<\/strong><\/td>\n<td>20A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u1ee8ng d\u1ee5ng c\u00f4ng nghi\u1ec7p<\/h3>\n<table style=\"border-collapse: collapse; width: 100%; margin-bottom: 20px;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Lo\u1ea1i m\u1ea1ch<\/th>\n<th>T\u1ea3i \u0111i\u1ec3n h\u00ecnh<\/th>\n<th>\u0110\u01b0\u1eddng Cong \u0110\u01b0\u1ee3c \u0110\u1ec1 Xu\u1ea5t<\/th>\n<th>K\u00edch th\u01b0\u1edbc m\u00e1y c\u1eaft<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1<\/td>\n<td>\u0110\u1ed9ng c\u01a1 3 pha &lt;50 HP<\/td>\n<td><strong>Lo\u1ea1i C ho\u1eb7c K<\/strong><\/td>\n<td>Theo d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7y t\u1ea3i (FLA) c\u1ee7a \u0111\u1ed9ng c\u01a1<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ed9ng c\u01a1 l\u1edbn<\/td>\n<td>&gt;50 HP, kh\u1edfi \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp<\/td>\n<td><strong>D<\/strong><\/td>\n<td>Theo d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7y t\u1ea3i (FLA) c\u1ee7a \u0111\u1ed9ng c\u01a1<\/td>\n<\/tr>\n<tr>\n<td>Thi\u1ebft b\u1ecb h\u00e0n<\/td>\n<td>M\u00e1y h\u00e0n h\u1ed3 quang, m\u00e1y h\u00e0n \u0111i\u1ec3m<\/td>\n<td><strong>D<\/strong><\/td>\n<td>M\u1ed7i thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y bi\u1ebfn \u00e1p<\/td>\n<td>M\u00e1y bi\u1ebfn \u00e1p ph\u00e2n ph\u1ed1i<\/td>\n<td><strong>D<\/strong><\/td>\n<td>Theo d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p<\/td>\n<\/tr>\n<tr>\n<td>H\u1ec7 th\u1ed1ng b\u0103ng t\u1ea3i<\/td>\n<td>X\u1eed l\u00fd v\u1eadt li\u1ec7u<\/td>\n<td><strong>C ho\u1eb7c D<\/strong><\/td>\n<td>Theo t\u1ea3i h\u1ec7 th\u1ed1ng<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y n\u00e9n<\/td>\n<td>M\u00e1y n\u00e9n kh\u00ed, m\u00e1y l\u00e0m l\u1ea1nh n\u01b0\u1edbc<\/td>\n<td><strong>C ho\u1eb7c D<\/strong><\/td>\n<td>Theo d\u00f2ng \u0111i\u1ec7n \u0111\u1ea7y t\u1ea3i (FLA) c\u1ee7a m\u00e1y n\u00e9n<\/td>\n<\/tr>\n<tr>\n<td>M\u00e1y m\u00f3c CNC<\/td>\n<td>M\u00e1y c\u00f4ng c\u1ee5, m\u00e1y ti\u1ec7n<\/td>\n<td><strong>C<\/strong><\/td>\n<td>Theo t\u1ea3i m\u00e1y<\/td>\n<\/tr>\n<tr>\n<td>T\u1ee7 \u0111i\u1ec7n PLC<\/td>\n<td>H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n<\/td>\n<td><strong>B ho\u1eb7c Z<\/strong><\/td>\n<td>10-20A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<h2>C\u00e1c ch\u1ee7 \u0111\u1ec1 n\u00e2ng cao: Ph\u1ed1i h\u1ee3p \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft<\/h2>\n<h3>Ph\u1ed1i h\u1ee3p n\u1ed1i ti\u1ebfp (Ph\u1ed1i h\u1ee3p d\u1ecdc)<\/h3>\n<p><strong>M\u1ee5c ti\u00eau<\/strong>: \u0110\u1ea3m b\u1ea3o aptomat h\u1ea1 ngu\u1ed3n ng\u1eaft tr\u01b0\u1edbc aptomat th\u01b0\u1ee3ng ngu\u1ed3n<\/p>\n<p><strong>Ph\u01b0\u01a1ng ph\u00e1p<\/strong>:<\/p>\n<ol>\n<li>V\u1ebd c\u1ea3 hai \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft tr\u00ean c\u00f9ng m\u1ed9t \u0111\u1ed3 th\u1ecb log-log<\/li>\n<li>X\u00e1c minh \u0111\u01b0\u1eddng cong h\u1ea1 ngu\u1ed3n n\u1eb1m ho\u00e0n to\u00e0n b\u00ean tr\u00e1i \u0111\u01b0\u1eddng cong th\u01b0\u1ee3ng ngu\u1ed3n<\/li>\n<li>Ki\u1ec3m tra kho\u1ea3ng th\u1eddi gian t\u00e1ch t\u1ed1i thi\u1ec3u (th\u01b0\u1eddng l\u00e0 0,1-0,2 gi\u00e2y)<\/li>\n<\/ol>\n<p><strong>V\u00ed d\u1ee5<\/strong>:<\/p>\n<ul>\n<li><strong>Th\u01b0\u1ee3ng ngu\u1ed3n<\/strong>: Aptomat ch\u00ednh C100<\/li>\n<li><strong>H\u1ea1 ngu\u1ed3n<\/strong>: Aptomat nh\u00e1nh C20<\/li>\n<li>T\u1ea1i s\u1ef1 c\u1ed1 200A (10\u00d7 h\u1ea1 ngu\u1ed3n, 2\u00d7 th\u01b0\u1ee3ng ngu\u1ed3n):\n<ul>\n<li>C20 ng\u1eaft trong 0,01-0,1 gi\u00e2y (v\u00f9ng t\u1eeb t\u00ednh)<\/li>\n<li>C100 v\u1eabn \u0111\u00f3ng (v\u00f9ng nhi\u1ec7t, s\u1ebd ng\u1eaft trong 100+ gi\u00e2y)<\/li>\n<li><strong>Qu\u1ea3<\/strong>: \u0110\u1ea1t \u0111\u01b0\u1ee3c ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Ph\u1ed1i h\u1ee3p v\u00f9ng (Ph\u1ed1i h\u1ee3p ngang)<\/h3>\n<p><strong>M\u1ee5c ti\u00eau<\/strong>: Ph\u1ed1i h\u1ee3p c\u00e1c aptomat \u1edf c\u00f9ng m\u1ee9c (m\u1ea1ch song song)<\/p>\n<p><strong>Nh\u1eefng c\u00e2n nh\u1eafc<\/strong>:<\/p>\n<ul>\n<li>T\u1ea5t c\u1ea3 c\u00e1c m\u1ea1ch nh\u00e1nh n\u00ean s\u1eed d\u1ee5ng c\u00f9ng lo\u1ea1i \u0111\u01b0\u1eddng cong \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n<\/li>\n<li>Ng\u0103n ch\u1eb7n s\u1ef1 c\u1ed1 c\u1ee7a m\u1ed9t m\u1ea1ch \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c m\u1ea1ch l\u00e2n c\u1eadn<\/li>\n<li>\u0110\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 v\u00e0 b\u1ea3o tr\u00ec<\/li>\n<\/ul>\n<h3>C\u00e1c c\u00e2n nh\u1eafc v\u1ec1 h\u1ed3 quang \u0111i\u1ec7n<\/h3>\n<p><strong>T\u00e1c \u0111\u1ed9ng c\u1ee7a \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft \u0111\u1ebfn nguy c\u01a1 h\u1ed3 quang \u0111i\u1ec7n<\/strong>:<\/p>\n<ul>\n<li>Th\u1eddi gian ng\u1eaft nhanh h\u01a1n = n\u0103ng l\u01b0\u1ee3ng s\u1ef1 c\u1ed1 th\u1ea5p h\u01a1n<\/li>\n<li>Ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc c\u00f3 th\u1ec3 l\u00e0m t\u0103ng nguy c\u01a1 h\u1ed3 quang \u0111i\u1ec7n (tr\u00ec ho\u00e3n th\u01b0\u1ee3ng ngu\u1ed3n)<\/li>\n<li>C\u00e2n b\u1eb1ng gi\u1eefa t\u00ednh ch\u1ecdn l\u1ecdc v\u00e0 gi\u1ea3m h\u1ed3 quang \u0111i\u1ec7n<\/li>\n<\/ul>\n<p><strong>C\u00e1c chi\u1ebfn l\u01b0\u1ee3c gi\u1ea3m thi\u1ec3u<\/strong>:<\/p>\n<ol>\n<li>S\u1eed d\u1ee5ng c\u00e0i \u0111\u1eb7t ng\u1eaft t\u1ee9c th\u1eddi khi ph\u1ed1i h\u1ee3p cho ph\u00e9p<\/li>\n<li>L\u1eafp \u0111\u1eb7t r\u01a1 le h\u1ed3 quang \u0111i\u1ec7n cho thi\u1ebft b\u1ecb n\u0103ng l\u01b0\u1ee3ng cao<\/li>\n<li>Tri\u1ec3n khai c\u00f4ng t\u1eafc ch\u1ebf \u0111\u1ed9 b\u1ea3o tr\u00ec (b\u1ecf qua ph\u1ed1i h\u1ee3p)<\/li>\n<li>S\u1eed d\u1ee5ng aptomat gi\u1edbi h\u1ea1n d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 gi\u1ea3m n\u0103ng l\u01b0\u1ee3ng th\u00f4ng qua<\/li>\n<\/ol>\n<hr \/>\n<h2>Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQ)<\/h2>\n<figure style=\"text-align: center; margin: 20px 0;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto;\" src=\"https:\/\/img.viox.com\/VIOX-circuit-breaker-trip-curve-testing-equipment-with-digital-display-showing-time-current-characteristic-analysis-in-professional-laboratory-setting.webp\" alt=\"VIOX circuit breaker trip curve testing equipment with digital display showing time current characteristic analysis in professional laboratory setting\" \/><figcaption style=\"font-style: italic; color: #666; font-size: 0.9em; margin-top: 10px;\">H\u00ecnh 5: Hi\u1ec7u chu\u1ea9n chuy\u00ean nghi\u1ec7p trong ph\u00f2ng th\u00ed nghi\u1ec7m c\u1ee7a aptomat VIOX \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 ch\u00ednh x\u00e1c \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 \u0111\u1ed9 tin c\u1eady.<\/figcaption><\/figure>\n<h3>C\u00e2u h\u1ecfi 1: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft v\u00e0 \u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n l\u00e0 g\u00ec?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: Ch\u00fang l\u00e0 c\u00f9ng m\u1ed9t th\u1ee9. \u201c\u0110\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft\u201d v\u00e0 \u201c\u0111\u01b0\u1eddng cong th\u1eddi gian-d\u00f2ng \u0111i\u1ec7n\u201d l\u00e0 c\u00e1c thu\u1eadt ng\u1eef c\u00f3 th\u1ec3 ho\u00e1n \u0111\u1ed5i cho nhau \u0111\u1ec3 bi\u1ec3u di\u1ec5n \u0111\u1ed3 h\u1ecda c\u00e1c \u0111\u1eb7c t\u00ednh ng\u1eaft c\u1ee7a aptomat. M\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t c\u0169ng g\u1ecdi ch\u00fang l\u00e0 \u201c\u0111\u01b0\u1eddng cong \u0111\u1eb7c tr\u01b0ng\u201d ho\u1eb7c \u201c\u0111\u01b0\u1eddng cong I-t\u201d.\u201d<\/p>\n<h3>C\u00e2u h\u1ecfi 2: T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng aptomat lo\u1ea1i D cho c\u00e1c \u1ee9ng d\u1ee5ng d\u00e2n d\u1ee5ng kh\u00f4ng?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: M\u1eb7c d\u00f9 v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt l\u00e0 c\u00f3 th\u1ec3, nh\u01b0ng th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb. Aptomat lo\u1ea1i D y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 r\u1ea5t cao (10-20\u00d7 In) \u0111\u1ec3 ng\u1eaft nhanh ch\u00f3ng. Trong c\u00e1c l\u1eafp \u0111\u1eb7t d\u00e2n d\u1ee5ng v\u1edbi \u0111\u01b0\u1eddng c\u00e1p d\u00e0i, d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 c\u00f3 s\u1eb5n c\u00f3 th\u1ec3 kh\u00f4ng \u0111\u1ee7, d\u1eabn \u0111\u1ebfn s\u1ef1 ch\u1eadm tr\u1ec5 ng\u1eaft nguy hi\u1ec3m. \u0110\u01b0\u1eddng cong lo\u1ea1i B ho\u1eb7c C ph\u00f9 h\u1ee3p cho h\u1ea7u h\u1ebft c\u00e1c t\u1ea3i d\u00e2n d\u1ee5ng.<\/p>\n<h3>C\u00e2u h\u1ecfi 3: L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 bi\u1ebft aptomat c\u1ee7a t\u00f4i l\u00e0 lo\u1ea1i B, C hay D?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: Ki\u1ec3m tra nh\u00e3n ho\u1eb7c d\u1ea5u tr\u00ean aptomat. C\u00e1c aptomat tu\u00e2n th\u1ee7 IEC s\u1ebd c\u00f3 lo\u1ea1i \u0111\u01b0\u1eddng cong \u0111\u01b0\u1ee3c in tr\u01b0\u1edbc \u0111\u1ecbnh m\u1ee9c ampe (v\u00ed d\u1ee5: \u201cC20\u201d = Lo\u1ea1i C, 20A). C\u00e1c aptomat \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea theo UL c\u00f3 th\u1ec3 kh\u00f4ng s\u1eed d\u1ee5ng k\u00fd hi\u1ec7u n\u00e0y; tham kh\u1ea3o b\u1ea3ng d\u1eef li\u1ec7u c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 bi\u1ebft c\u00e1c \u0111\u1eb7c t\u00ednh \u0111\u01b0\u1eddng cong \u0111\u1eb7c t\u00ednh ng\u1eaft.<\/p>\n<h3>C\u00e2u h\u1ecfi 4: T\u1ea1i sao aptomat c\u1ee7a t\u00f4i ng\u1eaft khi tr\u1eddi n\u00f3ng nh\u01b0ng kh\u00f4ng ng\u1eaft v\u00e0o m\u00f9a \u0111\u00f4ng?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: C\u00e1c ph\u1ea7n t\u1eed nhi\u1ec7t c\u1ee7a aptomat nh\u1ea1y c\u1ea3m v\u1edbi nhi\u1ec7t \u0111\u1ed9. Nhi\u1ec7t \u0111\u1ed9 m\u00f4i tr\u01b0\u1eddng xung quanh cao h\u01a1n l\u00e0m n\u00f3ng tr\u01b0\u1edbc d\u1ea3i l\u01b0\u1ee1ng kim, khi\u1ebfn n\u00f3 ng\u1eaft \u1edf d\u00f2ng \u0111i\u1ec7n th\u1ea5p h\u01a1n ho\u1eb7c th\u1eddi gian nhanh h\u01a1n. \u0110\u00e2y l\u00e0 h\u00e0nh vi b\u00ecnh th\u01b0\u1eddng. N\u1ebfu x\u1ea3y ra ng\u1eaft do nhi\u1ec5u, h\u00e3y c\u00e2n nh\u1eafc:<\/p>\n<ul>\n<li>C\u1ea3i thi\u1ec7n th\u00f4ng gi\u00f3 b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>Di chuy\u1ec3n b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n \u0111\u1ebfn khu v\u1ef1c m\u00e1t h\u01a1n<\/li>\n<li>N\u00e2ng c\u1ea5p l\u00ean \u0111\u1ecbnh m\u1ee9c ampe cao h\u01a1n ti\u1ebfp theo (n\u1ebfu d\u00e2y d\u1eabn cho ph\u00e9p)<\/li>\n<li>Chuy\u1ec3n sang lo\u1ea1i \u0111\u01b0\u1eddng cong cao h\u01a1n (B \u2192 C)<\/li>\n<\/ul>\n<h3>Q5: \u0110i\u1ec1u g\u00ec x\u1ea3y ra n\u1ebfu t\u00f4i l\u1eafp \u0111\u1eb7t m\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 \u0111\u01b0\u1eddng cong \u0111\u1ecbnh m\u1ee9c qu\u00e1 cao?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: B\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 kh\u00f4ng cung c\u1ea5p \u0111\u1ee7 kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 cho d\u00e2y d\u1eabn. Trong qu\u00e1 tr\u00ecnh x\u1ea3y ra s\u1ef1 c\u1ed1, c\u00e1p c\u00f3 th\u1ec3 qu\u00e1 n\u00f3ng tr\u01b0\u1edbc khi b\u1ed9 ng\u1eaft m\u1ea1ch t\u00e1c \u0111\u1ed9ng, c\u00f3 kh\u1ea3 n\u0103ng g\u00e2y h\u01b0 h\u1ecfng l\u1edbp c\u00e1ch \u0111i\u1ec7n ho\u1eb7c h\u1ecfa ho\u1ea1n. Lu\u00f4n x\u00e1c minh r\u1eb1ng c\u00e1c \u0111\u1eb7c t\u00ednh t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch b\u1ea3o v\u1ec7 d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p c\u1ee7a d\u00e2y d\u1eabn theo NEC 240.4.<\/p>\n<h3>Q6: T\u1ea5t c\u1ea3 c\u00e1c c\u1ef1c c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch nhi\u1ec1u c\u1ef1c c\u00f3 s\u1eed d\u1ee5ng c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng kh\u00f4ng?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: C\u00f3. M\u1ed9t b\u1ed9 ng\u1eaft m\u1ea1ch 3 c\u1ef1c c\u00f3 c\u00f9ng m\u1ed9t \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng (v\u00ed d\u1ee5: Lo\u1ea1i C) cho c\u1ea3 ba c\u1ef1c. Tuy nhi\u00ean, m\u1ed7i c\u1ef1c c\u00f3 c\u01a1 ch\u1ebf t\u00e1c \u0111\u1ed9ng t\u1eeb v\u00e0 nhi\u1ec7t ri\u00eang, do \u0111\u00f3, s\u1ef1 c\u1ed1 tr\u00ean b\u1ea5t k\u1ef3 pha n\u00e0o s\u1ebd l\u00e0m cho t\u1ea5t c\u1ea3 c\u00e1c c\u1ef1c t\u00e1c \u0111\u1ed9ng \u0111\u1ed3ng th\u1eddi (t\u00e1c \u0111\u1ed9ng chung).<\/p>\n<h3>Q7: T\u00f4i c\u00f3 th\u1ec3 tr\u1ed9n c\u00e1c lo\u1ea1i \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng kh\u00e1c nhau trong c\u00f9ng m\u1ed9t t\u1ee7 \u0111i\u1ec7n kh\u00f4ng?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: C\u00f3, b\u1ea1n c\u00f3 th\u1ec3 tr\u1ed9n c\u00e1c lo\u1ea1i \u0111\u01b0\u1eddng cong trong m\u1ed9t t\u1ee7 \u0111i\u1ec7n. Tr\u00ean th\u1ef1c t\u1ebf, th\u01b0\u1eddng c\u1ea7n thi\u1ebft ph\u1ea3i k\u1ebft h\u1ee3p b\u1ed9 ng\u1eaft m\u1ea1ch c\u1ee7a m\u1ed7i m\u1ea1ch v\u1edbi c\u00e1c \u0111\u1eb7c t\u00ednh t\u1ea3i c\u1ee5 th\u1ec3 c\u1ee7a n\u00f3. V\u00ed d\u1ee5: m\u1ed9t t\u1ee7 \u0111i\u1ec7n c\u00f3 th\u1ec3 c\u00f3 b\u1ed9 ng\u1eaft m\u1ea1ch Lo\u1ea1i B cho chi\u1ebfu s\u00e1ng, Lo\u1ea1i C cho \u1ed5 c\u1eafm chung v\u00e0 Lo\u1ea1i D cho m\u1ea1ch \u0111\u1ed9ng c\u01a1 l\u1edbn.<\/p>\n<h3>Q8: L\u00e0m c\u00e1ch n\u00e0o \u0111\u1ec3 ki\u1ec3m tra xem \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng c\u1ee7a b\u1ed9 ng\u1eaft m\u1ea1ch c\u1ee7a t\u00f4i c\u00f3 c\u00f2n ch\u00ednh x\u00e1c kh\u00f4ng?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: Ki\u1ec3m tra \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng \u0111\u00f2i h\u1ecfi thi\u1ebft b\u1ecb chuy\u00ean d\u1ee5ng (b\u1ed9 ki\u1ec3m tra d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p) \u0111\u1ec3 \u0111\u01b0a d\u00f2ng \u0111i\u1ec7n ch\u00ednh x\u00e1c v\u00e0 \u0111o th\u1eddi gian t\u00e1c \u0111\u1ed9ng. Vi\u1ec7c ki\u1ec3m tra n\u00e0y n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean c\u00f3 tr\u00ecnh \u0111\u1ed9 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a ch\u01b0\u01a1ng tr\u00ecnh b\u1ea3o tr\u00ec ph\u00f2ng ng\u1eeba, th\u01b0\u1eddng l\u00e0 3-5 n\u0103m m\u1ed9t l\u1ea7n \u0111\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t quan tr\u1ecdng ho\u1eb7c theo khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h3>Q9: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng c\u1ee7a MCB v\u00e0 MCCB l\u00e0 g\u00ec?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: MCB (B\u1ed9 ng\u1eaft m\u1ea1ch thu nh\u1ecf) s\u1eed d\u1ee5ng c\u00e1c \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng c\u1ed1 \u0111\u1ecbnh (B, C, D, K, Z) \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1edfi IEC 60898-1. MCCB (B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac) th\u01b0\u1eddng c\u00f3 c\u00e1c c\u00e0i \u0111\u1eb7t t\u00e1c \u0111\u1ed9ng c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh (d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i d\u00e0i h\u1ea1n, d\u00f2ng \u0111i\u1ec7n qu\u00e1 t\u1ea3i ng\u1eafn h\u1ea1n, d\u00f2ng \u0111i\u1ec7n t\u00e1c \u0111\u1ed9ng t\u1ee9c th\u1eddi) theo IEC 60947-2, cho ph\u00e9p t\u00f9y ch\u1ec9nh \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3.<\/p>\n<h3>Q10: T\u1ea1i sao m\u1ed9t s\u1ed1 \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng hi\u1ec3n th\u1ecb m\u1ed9t d\u1ea3i dung sai thay v\u00ec m\u1ed9t \u0111\u01b0\u1eddng \u0111\u01a1n?<\/h3>\n<p><strong>M\u1ed9t<\/strong>: D\u1ea3i dung sai t\u00ednh \u0111\u1ebfn c\u00e1c bi\u1ebfn th\u1ec3 s\u1ea3n xu\u1ea5t, \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9 v\u00e0 dung sai c\u1ee7a c\u00e1c th\u00e0nh ph\u1ea7n. Ti\u00eau chu\u1ea9n IEC cho ph\u00e9p bi\u1ebfn thi\u00ean \u00b120% v\u1ec1 th\u1eddi gian t\u00e1c \u0111\u1ed9ng. Ranh gi\u1edbi tr\u00ean bi\u1ec3u th\u1ecb th\u1eddi gian t\u1ed1i \u0111a tr\u01b0\u1edbc khi b\u1ed9 ng\u1eaft m\u1ea1ch ph\u1ea3i t\u00e1c \u0111\u1ed9ng (\u0111\u1ea3m b\u1ea3o b\u1ea3o v\u1ec7), trong khi ranh gi\u1edbi d\u01b0\u1edbi bi\u1ec3u th\u1ecb th\u1eddi gian t\u1ed1i thi\u1ec3u tr\u01b0\u1edbc khi b\u1ed9 ng\u1eaft m\u1ea1ch c\u00f3 th\u1ec3 t\u00e1c \u0111\u1ed9ng (ng\u0103n ch\u1eb7n t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n).<\/p>\n<hr \/>\n<h2>T\u00e0i nguy\u00ean VIOX li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u to\u00e0n di\u1ec7n v\u1ec1 b\u1ea3o v\u1ec7 m\u1ea1ch v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n \u0111i\u1ec7n, h\u00e3y kh\u00e1m ph\u00e1 c\u00e1c h\u01b0\u1edbng d\u1eabn VIOX li\u00ean quan sau:<\/p>\n<h3>Nguy\u00ean t\u1eafc c\u01a1 b\u1ea3n v\u1ec1 b\u1ed9 ng\u1eaft m\u1ea1ch<\/h3>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/what-is-a-miniature-circuit-breaker-mcb\/\">B\u1ed9 ng\u1eaft m\u1ea1ch thu nh\u1ecf (MCB) l\u00e0 g\u00ec?<\/a> \u2013 H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 c\u1ea5u t\u1ea1o, ho\u1ea1t \u0111\u1ed9ng v\u00e0 l\u1ef1a ch\u1ecdn MCB<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/what-is-a-molded-case-circuit-breaker-mccb\/\">B\u1ed9 ng\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac (MCCB) l\u00e0 g\u00ec?<\/a> \u2013 T\u00ecm hi\u1ec3u c\u00e1c \u1ee9ng d\u1ee5ng MCCB v\u00e0 c\u00e0i \u0111\u1eb7t t\u00e1c \u0111\u1ed9ng c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/types-of-circuit-breakers\/\">C\u00e1c lo\u1ea1i m\u00e1y c\u1eaft m\u1ea1ch<\/a> \u2013 T\u1ed5ng quan to\u00e0n di\u1ec7n v\u1ec1 t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/how-to-know-if-circuit-breaker-is-bad\/\">L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 bi\u1ebft c\u1ea7u dao b\u1ecb h\u1ecfng<\/a> \u2013 C\u00e1c quy tr\u00ecnh ki\u1ec3m tra v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1<\/li>\n<\/ul>\n<h3>L\u1ef1a ch\u1ecdn v\u00e0 \u0111\u1ecbnh c\u1ee1 b\u1ed9 ng\u1eaft m\u1ea1ch<\/h3>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/type-of-mcb\/\">Lo\u1ea1i MCB<\/a> \u2013 So s\u00e1nh chi ti\u1ebft c\u00e1c lo\u1ea1i v\u00e0 \u1ee9ng d\u1ee5ng MCB<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/how-to-choose-the-right-miniature-circuit-breaker\/\">C\u00e1ch ch\u1ecdn Aptomat thu nh\u1ecf ph\u00f9 h\u1ee3p<\/a> \u2013 Ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn v\u00e0 khu\u00f4n kh\u1ed5 quy\u1ebft \u0111\u1ecbnh<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/standard-breaker-sizes\/\">C\u00e1c k\u00edch c\u1ee1 ti\u00eau chu\u1ea9n c\u1ee7a \u00c1pt\u00f4m\u00e1t<\/a> \u2013 X\u1ebfp h\u1ea1ng ampe ti\u00eau chu\u1ea9n NEC v\u00e0 IEC<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/50-amp-wire-size-selection-guide\/\">H\u01b0\u1edbng d\u1eabn ch\u1ecdn k\u00edch th\u01b0\u1edbc d\u00e2y 50 Amp<\/a> \u2013 Ph\u1ed1i h\u1ee3p k\u00edch th\u01b0\u1edbc d\u00e2y v\u1edbi \u0111\u1ecbnh m\u1ee9c b\u1ed9 ng\u1eaft m\u1ea1ch<\/li>\n<\/ul>\n<h3>Ph\u1ed1i h\u1ee3p b\u1ea3o v\u1ec7<\/h3>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/what-is-breaker-selectivity-coordination-guide\/\">H\u01b0\u1edbng d\u1eabn ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc aptomat l\u00e0 g\u00ec<\/a> \u2013 \u0110\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/circuit-breaker-ratings-icu-ics-icw-icm\/\">\u0110\u1ecbnh m\u1ee9c Aptomat ICU ICS ICW ICM<\/a> \u2013 T\u00ecm hi\u1ec3u v\u1ec1 kh\u1ea3 n\u0103ng c\u1eaft v\u00e0 ph\u1ed1i h\u1ee3p<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/mcb-breaking-capacity-6ka-vs-10ka-selection-guide\/\">H\u01b0\u1edbng d\u1eabn l\u1ef1a ch\u1ecdn kh\u1ea3 n\u0103ng c\u1eaft MCB 6kA so v\u1edbi 10kA<\/a> \u2013 Ch\u1ecdn \u0111\u1ecbnh m\u1ee9c ng\u1eafn m\u1ea1ch ph\u00f9 h\u1ee3p<\/li>\n<\/ul>\n<h3>Thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 chuy\u00ean d\u1ee5ng<\/h3>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/rcd-vs-gfci-breaker-difference-iec-nec\/\">So s\u00e1nh s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa RCD v\u00e0 GFCI theo ti\u00eau chu\u1ea9n IEC NEC<\/a> \u2013 So s\u00e1nh b\u1ea3o v\u1ec7 ch\u1ea1m \u0111\u1ea5t<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/rcbo-vs-rccb-mcb-comparison-space-cost-selectivity\/\">So s\u00e1nh RCBO so v\u1edbi RCCB MCB v\u1ec1 kh\u00f4ng gian, chi ph\u00ed, t\u00ednh ch\u1ecdn l\u1ecdc<\/a> \u2013 So s\u00e1nh b\u1ea3o v\u1ec7 k\u1ebft h\u1ee3p so v\u1edbi c\u00e1c thi\u1ebft b\u1ecb ri\u00eang bi\u1ec7t<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/understanding-afdd-iec-62606-arc-fault-protection\/\">T\u00ecm hi\u1ec3u v\u1ec1 b\u1ea3o v\u1ec7 h\u1ed3 quang \u0111i\u1ec7n AFDD IEC 62606<\/a> \u2013 C\u00f4ng ngh\u1ec7 ph\u00e1t hi\u1ec7n h\u1ed3 quang \u0111i\u1ec7n<\/li>\n<\/ul>\n<h3>C\u00e0i \u0111\u1eb7t v\u00e0 ti\u00eau chu\u1ea9n<\/h3>\n<ul>\n<li><a href=\"https:\/\/test.viox.com\/vi\/electrical-derating-temperature-altitude-grouping-factors\/\">C\u00e1c y\u1ebfu t\u1ed1 gi\u1ea3m \u0111\u1ecbnh m\u1ee9c \u0111i\u1ec7n do nhi\u1ec7t \u0111\u1ed9, \u0111\u1ed9 cao, nh\u00f3m<\/a> \u2013 Gi\u1ea3m \u0111\u1ecbnh m\u1ee9c do m\u00f4i tr\u01b0\u1eddng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00ednh x\u00e1c<\/li>\n<li><a href=\"https:\/\/test.viox.com\/vi\/iec-60898-1-vs-iec-60947-2\/\">IEC 60898-1 so v\u1edbi IEC 60947-2<\/a> \u2013 T\u00ecm hi\u1ec3u c\u00e1c ti\u00eau chu\u1ea9n \u00e1p d\u1ee5ng cho MCB v\u00e0 <a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">MCCBs<\/a><\/li>\n<\/ul>\n<hr \/>\n<h2>K\u1ebft lu\u1eadn: N\u1eafm v\u1eefng c\u00e1c \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 t\u1ed1i \u01b0u<\/h2>\n<p>C\u00e1c \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng l\u00e0 n\u1ec1n t\u1ea3ng c\u1ee7a b\u1ea3o v\u1ec7 \u0111i\u1ec7n hi\u1ec7u qu\u1ea3. B\u1eb1ng c\u00e1ch hi\u1ec3u m\u1ed1i quan h\u1ec7 gi\u1eefa c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n v\u00e0 th\u1eddi gian t\u00e1c \u0111\u1ed9ng, b\u1ea1n c\u00f3 th\u1ec3:<\/p>\n<ul>\n<li>\u2705 <strong>Ch\u1ecdn \u0111\u00fang b\u1ed9 ng\u1eaft m\u1ea1ch<\/strong> cho m\u1ed7i \u1ee9ng d\u1ee5ng\u2014lo\u1ea1i b\u1ecf t\u00e1c \u0111\u1ed9ng kh\u00f4ng mong mu\u1ed1n \u0111\u1ed3ng th\u1eddi duy tr\u00ec kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 m\u1ea1nh m\u1ebd<\/li>\n<li>\u2705 <strong>\u0110\u1ea1t \u0111\u01b0\u1ee3c s\u1ef1 ph\u1ed1i h\u1ee3p ch\u1ecdn l\u1ecdc<\/strong>\u2014\u0111\u1ea3m b\u1ea3o c\u00e1c s\u1ef1 c\u1ed1 \u0111\u01b0\u1ee3c c\u00f4 l\u1eadp \u1edf m\u1ee9c th\u1ea5p nh\u1ea5t m\u00e0 kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c m\u1ea1ch th\u01b0\u1ee3ng ngu\u1ed3n<\/li>\n<li>\u2705 <strong>Tu\u00e2n th\u1ee7 c\u00e1c quy t\u1eafc \u0111i\u1ec7n<\/strong>\u2014\u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a NEC v\u00e0 IEC v\u1ec1 b\u1ea3o v\u1ec7 d\u00e2y d\u1eabn v\u00e0 an to\u00e0n h\u1ec7 th\u1ed1ng<\/li>\n<li>\u2705 <strong>T\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng<\/strong>\u2014gi\u1ea3m th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng v\u00e0 chi ph\u00ed b\u1ea3o tr\u00ec th\u00f4ng qua l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p<\/li>\n<li>\u2705 <strong>N\u00e2ng cao an to\u00e0n cho nh\u00e2n vi\u00ean<\/strong>\u2014cung c\u1ea5p kh\u1ea3 n\u0103ng lo\u1ea1i b\u1ecf s\u1ef1 c\u1ed1 nhanh ch\u00f3ng \u0111\u1ec3 gi\u1ea3m thi\u1ec3u c\u00e1c m\u1ed1i nguy hi\u1ec3m do h\u1ed3 quang \u0111i\u1ec7n v\u00e0 r\u1ee7i ro \u0111i\u1ec7n gi\u1eadt<\/li>\n<\/ul>\n<p><strong>\u0110i\u1ec3m ch\u00ednh<\/strong>: Kh\u00f4ng c\u00f3 \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng \u201ct\u1ed1t nh\u1ea5t\u201d\u2014ch\u1ec9 c\u00f3 \u0111\u01b0\u1eddng cong ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 c\u1ee7a b\u1ea1n. Lo\u1ea1i B v\u01b0\u1ee3t tr\u1ed9i cho t\u1ea3i \u0111i\u1ec7n tr\u1edf, Lo\u1ea1i C x\u1eed l\u00fd vi\u1ec7c s\u1eed d\u1ee5ng chung trong th\u01b0\u01a1ng m\u1ea1i\/c\u00f4ng nghi\u1ec7p v\u00e0 Lo\u1ea1i D qu\u1ea3n l\u00fd thi\u1ebft b\u1ecb c\u00f3 d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng cao. Lu\u00f4n ph\u00e2n t\u00edch c\u00e1c \u0111\u1eb7c t\u00ednh t\u1ea3i c\u1ee7a b\u1ea1n, t\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 c\u00f3 s\u1eb5n v\u00e0 x\u00e1c minh s\u1ef1 ph\u1ed1i h\u1ee3p tr\u01b0\u1edbc khi ho\u00e0n thi\u1ec7n vi\u1ec7c l\u1ef1a ch\u1ecdn b\u1ed9 ng\u1eaft m\u1ea1ch.<\/p>\n<p>\u0110\u1ed1i v\u1edbi c\u00e1c c\u00e0i \u0111\u1eb7t ph\u1ee9c t\u1ea1p ho\u1eb7c h\u1ec7 th\u1ed1ng quan tr\u1ecdng, h\u00e3y tham kh\u1ea3o \u00fd ki\u1ebfn c\u1ee7a c\u00e1c k\u1ef9 s\u01b0 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9 v\u00e0 s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m ph\u1ed1i h\u1ee3p c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u1ec3 x\u00e1c minh vi\u1ec7c l\u1ef1a ch\u1ecdn \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng. VIOX Electric cung c\u1ea5p h\u1ed7 tr\u1ee3 k\u1ef9 thu\u1eadt to\u00e0n di\u1ec7n v\u00e0 c\u00e1c nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng b\u1ea3o v\u1ec7 \u0111i\u1ec7n c\u1ee7a b\u1ea1n ho\u1ea1t \u0111\u1ed9ng \u0111\u00e1ng tin c\u1eady trong m\u1ecdi \u0111i\u1ec1u ki\u1ec7n v\u1eadn h\u00e0nh.<\/p>\n<p><strong>B\u1ea1n \u0111\u00e3 s\u1eb5n s\u00e0ng ch\u1ec9 \u0111\u1ecbnh b\u1ed9 ng\u1eaft m\u1ea1ch cho d\u1ef1 \u00e1n ti\u1ebfp theo c\u1ee7a m\u00ecnh ch\u01b0a?<\/strong> Li\u00ean h\u1ec7 v\u1edbi nh\u00f3m k\u1ef9 thu\u1eadt c\u1ee7a VIOX Electric \u0111\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t \u0111\u01b0\u1eddng cong t\u00e1c \u0111\u1ed9ng c\u1ee5 th\u1ec3 cho \u1ee9ng d\u1ee5ng v\u00e0 ph\u00e2n t\u00edch ph\u1ed1i h\u1ee3p.<\/p>\n<p>&nbsp;<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Key Takeaways Trip curves are time-current graphs that define how quickly circuit breakers respond to overcurrent conditions Five main curve types (B, C, D, K, Z) serve different applications\u2014from sensitive electronics to heavy industrial motors Thermal-magnetic mechanisms combine slow overload protection with instantaneous short-circuit interruption Proper curve selection eliminates nuisance tripping while maintaining robust protection [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18487,"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 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