{"id":18503,"date":"2025-07-21T01:08:29","date_gmt":"2025-07-20T17:08:29","guid":{"rendered":"https:\/\/viox.com\/?p=18503"},"modified":"2025-07-21T01:08:32","modified_gmt":"2025-07-20T17:08:32","slug":"ul-489-vs-ul-1077","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/ul-489-vs-ul-1077\/","title":{"rendered":"UL 489 so v\u1edbi UL 1077: H\u01b0\u1edbng d\u1eabn \u0111\u1ea7y \u0111\u1ee7 \u0111\u1ec3 hi\u1ec3u v\u1ec1 b\u1ea3o v\u1ec7 \u0111i\u1ec7n"},"content":{"rendered":"<div class=\"product-intro\"><strong>C\u00e2u Tr\u1ea3 L\u1eddi Tr\u1ef1c Ti\u1ebfp:<\/strong> Ti\u00eau chu\u1ea9n UL 489 bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch v\u00e0 c\u00f4ng t\u1eafc v\u1ecf \u0111\u00fac \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh trong t\u1ee7 b\u1ea3ng \u0111i\u1ec7n v\u00e0 t\u1ee7 ph\u00e2n ph\u1ed1i, trong khi UL 1077 bao g\u1ed3m c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 b\u1ed5 sung \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong thi\u1ebft b\u1ecb \u0111i\u1ec7n \u0111\u1ec3 b\u1ea3o v\u1ec7 \u1edf c\u1ea5p \u0111\u1ed9 linh ki\u1ec7n. S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh l\u00e0 thi\u1ebft b\u1ecb UL 489 cung c\u1ea5p b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh, trong khi thi\u1ebft b\u1ecb UL 1077 cung c\u1ea5p b\u1ea3o v\u1ec7 th\u1ee9 c\u1ea5p. Vi\u1ec7c hi\u1ec3u r\u00f5 hai ti\u00eau chu\u1ea9n UL quan tr\u1ecdng n\u00e0y l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ed1i v\u1edbi c\u00e1c nh\u00e0 th\u1ea7u \u0111i\u1ec7n, k\u1ef9 s\u01b0 v\u00e0 qu\u1ea3n l\u00fd c\u01a1 s\u1edf, nh\u1eefng ng\u01b0\u1eddi c\u1ea7n l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ph\u00f9 h\u1ee3p cho \u1ee9ng d\u1ee5ng c\u1ee7a m\u00ecnh v\u00e0 \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh.<img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-18763\" src=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL.webp\" alt=\"UL\" width=\"400\" height=\"400\" srcset=\"https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL.webp 400w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL-300x300.webp 300w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL-150x150.webp 150w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL-12x12.webp 12w, https:\/\/test.viox.com\/wp-content\/uploads\/2025\/07\/UL-100x100.webp 100w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<h2>Ti\u00eau chu\u1ea9n UL 489 v\u00e0 UL 1077 l\u00e0 g\u00ec?<\/h2>\n<h3>\u0110\u1ecbnh ngh\u0129a ti\u00eau chu\u1ea9n UL 489<\/h3>\n<p><a href=\"https:\/\/www.ul.com\/services\/circuit-breaker-and-supplementary-protector-services\" rel=\"nofollow noopener\" target=\"_blank\">UL 489<\/a> l\u00e0 Ti\u00eau chu\u1ea9n cho <a href=\"https:\/\/test.viox.com\/vi\/mccb\/\">M\u00e1y c\u1eaft m\u1ea1ch v\u1ecf \u0111\u00fac<\/a>, C\u00f4ng t\u1eafc \u0111\u00fac s\u1eb5n v\u00e0 V\u1ecf m\u00e1y c\u1eaft m\u1ea1ch. Ti\u00eau chu\u1ea9n n\u00e0y quy \u0111\u1ecbnh c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh m\u00e0 b\u1ea1n s\u1ebd t\u00ecm th\u1ea5y trong t\u1ee7 \u0111i\u1ec7n, b\u1ea3ng \u0111i\u1ec7n v\u00e0 trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1.<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>Ch\u00ednh b\u1ea3ng \u0111i\u1ec7n<\/li>\n<li>T\u1ee7 ph\u00e2n ph\u1ed1i<\/li>\n<li>Trung t\u00e2m \u0111i\u1ec1u khi\u1ec3n \u0111\u1ed9ng c\u01a1<\/li>\n<li>C\u00f4ng nghi\u1ec7p b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>Thi\u1ebft b\u1ecb l\u1ed1i v\u00e0o d\u1ecbch v\u1ee5<\/li>\n<\/ul>\n<h3>\u0110\u1ecbnh ngh\u0129a ti\u00eau chu\u1ea9n UL 1077<\/h3>\n<p>UL 1077 l\u00e0 Ti\u00eau chu\u1ea9n v\u1ec1 Thi\u1ebft b\u1ecb B\u1ea3o v\u1ec7 B\u1ed5 sung S\u1eed d\u1ee5ng trong Thi\u1ebft b\u1ecb \u0110i\u1ec7n. C\u00e1c thi\u1ebft b\u1ecb n\u00e0y cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 b\u1ed5 sung b\u00ean trong thi\u1ebft b\u1ecb \u0111i\u1ec7n v\u00e0 kh\u00f4ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 tr\u1edf th\u00e0nh ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 duy nh\u1ea5t.<\/p>\n<p><strong>\u1ee8ng d\u1ee5ng ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n b\u00ean trong thi\u1ebft b\u1ecb<\/li>\n<li>Th\u00e0nh ph\u1ea7n b\u1ea3o v\u1ec7 trong m\u00e1y m\u00f3c<\/li>\n<li>B\u1ea3o v\u1ec7 th\u1ee9 c\u1ea5p trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>B\u1ea3o v\u1ec7 l\u1ed7i c\u1ea5p thi\u1ebft b\u1ecb<\/li>\n<li>H\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n chi\u1ebfu s\u00e1ng<\/li>\n<\/ul>\n<h2>S\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa UL 489 v\u00e0 UL 1077<\/h2>\n<table>\n<tbody>\n<tr>\n<th>N\u0103ng<\/th>\n<th>UL 489<\/th>\n<th>Ti\u00eau chu\u1ea9n UL1077<\/th>\n<\/tr>\n<tr>\n<td><strong>S\u1eed d\u1ee5ng ch\u00ednh<\/strong><\/td>\n<td>B\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh<\/td>\n<td>B\u1ea3o v\u1ec7 b\u1ed5 sung<\/td>\n<\/tr>\n<tr>\n<td><strong>V\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t<\/strong><\/td>\n<td>T\u1ee7 \u0111i\u1ec7n, t\u1ee7 ph\u00e2n ph\u1ed1i<\/td>\n<td>Trong thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7<\/strong><\/td>\n<td>B\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh ch\u00ednh<\/td>\n<td>B\u1ea3o v\u1ec7 linh ki\u1ec7n\/thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>Kh\u1ea3 n\u0103ng ng\u1eaft<\/strong><\/td>\n<td>Cao (l\u00ean \u0111\u1ebfn 200kA)<\/td>\n<td>Th\u1ea5p h\u01a1n (th\u01b0\u1eddng l\u00e0 5-10kA)<\/td>\n<\/tr>\n<tr>\n<td><strong>M\u00e3 Ph\u00f9 H\u1ee3p<\/strong><\/td>\n<td>Tu\u00e2n th\u1ee7 \u0110i\u1ec1u 240 c\u1ee7a NEC<\/td>\n<td>Ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi b\u1ea3o v\u1ec7 UL 489<\/td>\n<\/tr>\n<tr>\n<td><strong>Y\u00eau c\u1ea7u ch\u1ea5m \u0111i\u1ec3m<\/strong><\/td>\n<td>&#8220;<a href=\"https:\/\/test.viox.com\/vi\/mcb\/\">C\u1ea7u dao \u0111i\u1ec7n<\/a>&#8220;<\/td>\n<td>\u201cNg\u01b0\u1eddi b\u1ea3o v\u1ec7 b\u1ed5 sung\u201d<\/td>\n<\/tr>\n<tr>\n<td><strong>Y\u00eau c\u1ea7u ki\u1ec3m tra<\/strong><\/td>\n<td>Ki\u1ec3m tra \u0111\u1ed9 b\u1ec1n m\u1edf r\u1ed9ng<\/td>\n<td>Ki\u1ec3m tra thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u00e1nh Gi\u00e1 C\u1ee7a Hi\u1ec7n T\u1ea1i<\/strong><\/td>\n<td>15A \u0111\u1ebfn 6000A<\/td>\n<td>Th\u00f4ng th\u01b0\u1eddng l\u00e0 0,5A \u0111\u1ebfn 63A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Hi\u1ec3u s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 k\u1ef9 thu\u1eadt<\/h2>\n<h3>Y\u00eau c\u1ea7u v\u1ec1 x\u00e2y d\u1ef1ng v\u00e0 thi\u1ebft k\u1ebf<\/h3>\n<p><strong>B\u1ed9 ng\u1eaft m\u1ea1ch UL 489:<\/strong><\/p>\n<ul>\n<li>K\u1ebft c\u1ea5u ch\u1eafc ch\u1eafn cho nhi\u1ec7m v\u1ee5 b\u1ea3o v\u1ec7 ch\u00ednh<\/li>\n<li>Nhi\u1ec1u bu\u1ed3ng d\u1eadp h\u1ed3 quang<\/li>\n<li>C\u01a1 ch\u1ebf chuy\u1ebfn \u0111i nhi\u1ec7t v\u00e0 t\u1eeb<\/li>\n<li>\u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 v\u1eadn h\u00e0nh th\u1ee7 c\u00f4ng th\u01b0\u1eddng xuy\u00ean<\/li>\n<li>Y\u00eau c\u1ea7u v\u1ec1 \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc cao h\u01a1n<\/li>\n<\/ul>\n<p><strong>B\u1ed9 b\u1ea3o v\u1ec7 b\u1ed5 sung UL 1077:<\/strong><\/p>\n<ul>\n<li>C\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3<\/li>\n<li>H\u1ec7 th\u1ed1ng d\u1eadp h\u1ed3 quang \u0111\u01a1n<\/li>\n<li>C\u01a1 ch\u1ebf chuy\u1ebfn \u0111i th\u01b0\u1eddng ch\u1ec9 c\u00f3 nhi\u1ec7t<\/li>\n<li>Y\u00eau c\u1ea7u v\u1eadn h\u00e0nh th\u1ee7 c\u00f4ng h\u1ea1n ch\u1ebf<\/li>\n<li>Ti\u00eau chu\u1ea9n \u0111\u1ed9 b\u1ec1n c\u01a1 h\u1ecdc th\u1ea5p h\u01a1n<\/li>\n<\/ul>\n<h3>\u0110\u1eb7c \u0111i\u1ec3m hi\u1ec7u su\u1ea5t<\/h3>\n<p><strong>So s\u00e1nh kh\u1ea3 n\u0103ng ng\u1eaft:<\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<th>\u1ee8ng d\u1ee5ng<\/th>\n<th>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh UL 489<\/th>\n<th>Ph\u1ea1m vi \u0111i\u1ec3n h\u00ecnh UL 1077<\/th>\n<\/tr>\n<tr>\n<td><strong>D\u00e2n c\u01b0<\/strong><\/td>\n<td>10kA \u2013 22kA<\/td>\n<td>5kA \u2013 10kA<\/td>\n<\/tr>\n<tr>\n<td><strong>Th\u01b0\u01a1ng nghi\u1ec7p<\/strong><\/td>\n<td>25kA \u2013 65kA<\/td>\n<td>5kA \u2013 10kA<\/td>\n<\/tr>\n<tr>\n<td><strong>C\u00f4ng nghi\u1ec7p<\/strong><\/td>\n<td>35kA \u2013 200kA<\/td>\n<td>T\u1ed1i \u0111a 10kA<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote><p><strong>Dr. Tr\u01b0\u1edbc An To\u00e0n C\u1ea3nh B\u00e1o:<\/strong> Kh\u00f4ng bao gi\u1edd thay th\u1ebf thi\u1ebft b\u1ecb UL 1077 b\u1eb1ng thi\u1ebft b\u1ecb UL 489 trong c\u00e1c \u1ee9ng d\u1ee5ng b\u1ea3o v\u1ec7 ch\u00ednh. \u0110i\u1ec1u n\u00e0y vi ph\u1ea1m c\u00e1c quy \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec7n v\u00e0 g\u00e2y ra c\u00e1c m\u1ed1i nguy hi\u1ec3m nghi\u00eam tr\u1ecdng v\u1ec1 an to\u00e0n.<\/p><\/blockquote>\n<h2>\u1ee8ng d\u1ee5ng, S\u1eed d\u1ee5ng tr\u01b0\u1eddng H\u1ee3p<\/h2>\n<h3>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng c\u1ea7u dao \u0111i\u1ec7n UL 489<\/h3>\n<p><strong>\u1ee8ng d\u1ee5ng ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 d\u1ecbch v\u1ee5 \u0111i\u1ec7n ch\u00ednh<\/li>\n<li>B\u1ea3o v\u1ec7 m\u1ea1ch c\u1ea5p ngu\u1ed3n<\/li>\n<li>B\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh trong b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>B\u1ea3o v\u1ec7 b\u1ed9 kh\u1edfi \u0111\u1ed9ng \u0111\u1ed9ng c\u01a1<\/li>\n<li>B\u1ea3o v\u1ec7 b\u1ea3ng chi\u1ebfu s\u00e1ng<\/li>\n<\/ul>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/strong><\/p>\n<ul>\n<li>C\u1ea7u dao ch\u00ednh 200A trong b\u1ea3ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng<\/li>\n<li>B\u1ed9 c\u1ea5p ngu\u1ed3n 100A cho b\u1ea3ng ph\u1ee5<\/li>\n<li>M\u1ea1ch nh\u00e1nh 20A cho \u1ed5 c\u1eafm<\/li>\n<li>B\u1ea3o v\u1ec7 \u0111\u1ed9ng c\u01a1 30A<\/li>\n<li>M\u1ea1ch chi\u1ebfu s\u00e1ng 277V<\/li>\n<\/ul>\n<h3>Khi n\u00e0o n\u00ean s\u1eed d\u1ee5ng B\u1ed9 b\u1ea3o v\u1ec7 b\u1ed5 sung UL 1077<\/h3>\n<p><strong>\u1ee8ng d\u1ee5ng ch\u00ednh:<\/strong><\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>B\u1ea3o v\u1ec7 linh ki\u1ec7n b\u00ean trong thi\u1ebft b\u1ecb<\/li>\n<li>B\u1ea3o v\u1ec7 th\u1ee9 c\u1ea5p trong m\u00e1y m\u00f3c<\/li>\n<li>B\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng \u0111i\u1ec1u khi\u1ec3n chi\u1ebfu s\u00e1ng<\/li>\n<li>B\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed<\/li>\n<\/ul>\n<p><strong>C\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng c\u1ee5 th\u1ec3:<\/strong><\/p>\n<ul>\n<li>B\u1ea3o v\u1ec7 5A cho m\u1ea1ch \u0111\u1ea7u v\u00e0o PLC<\/li>\n<li>B\u1ea3o v\u1ec7 2A cho m\u00e1y bi\u1ebfn \u00e1p \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>B\u1ea3o v\u1ec7 10A cho \u1ed5 \u0111\u0129a t\u1ea7n s\u1ed1 thay \u0111\u1ed5i<\/li>\n<li>B\u1ea3o v\u1ec7 15A cho ti\u1ebfp \u0111i\u1ec3m chi\u1ebfu s\u00e1ng<\/li>\n<li>B\u1ea3o v\u1ec7 1A cho c\u00e1c m\u00f4-\u0111un \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n t\u1eed<\/li>\n<\/ul>\n<h2>Ti\u00eau ch\u00ed l\u1ef1a ch\u1ecdn v\u00e0 th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t<\/h2>\n<h3>Ch\u1ecdn \u0111\u00fang ti\u00eau chu\u1ea9n<\/h3>\n<p><strong>S\u1eed d\u1ee5ng UL 489 khi:<\/strong><\/p>\n<ul>\n<li>B\u1ea1n c\u1ea7n b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh<\/li>\n<li>L\u1eafp \u0111\u1eb7t trong b\u1ea3ng \u0111i\u1ec7n ch\u00ednh<\/li>\n<li>B\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh ho\u1eb7c m\u1ea1ch c\u1ea5p \u0111i\u1ec7n<\/li>\n<li>\u0110\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u c\u1ee7a \u0110i\u1ec1u 240 NEC<\/li>\n<li>Y\u00eau c\u1ea7u kh\u1ea3 n\u0103ng ng\u1eaft cao<\/li>\n<\/ul>\n<p><strong>S\u1eed d\u1ee5ng UL 1077 khi:<\/strong><\/p>\n<ul>\n<li>B\u1ea1n c\u1ea7n s\u1ef1 b\u1ea3o v\u1ec7 b\u1ed5 sung<\/li>\n<li>L\u1eafp \u0111\u1eb7t b\u00ean trong thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/li>\n<li>B\u1ea3o v\u1ec7 m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li>\u0110\u00e3 c\u00f3 b\u1ea3o v\u1ec7 ch\u00ednh UL 489<\/li>\n<li>Y\u00eau c\u1ea7u c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o v\u1ec7 nh\u1ecf g\u1ecdn<\/li>\n<\/ul>\n<h3>Chuy\u00ean Gia L\u1ef1a Ch\u1ecdn L\u1eddi Khuy\u00ean<\/h3>\n<blockquote><p><strong>\ud83d\udca1 Chuy\u00ean Gia M\u1eb9o:<\/strong> Lu\u00f4n ki\u1ec3m tra xem c\u00e1c thi\u1ebft b\u1ecb UL 1077 c\u00f3 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u1edf h\u1ea1 l\u01b0u c\u1ee7a m\u1ee9c b\u1ea3o v\u1ec7 UL 489 ph\u00f9 h\u1ee3p hay kh\u00f4ng. Thi\u1ebft b\u1ecb UL 1077 ph\u1ea3i n\u1eb1m trong ph\u1ea1m vi b\u1ea3o v\u1ec7 c\u1ee7a thi\u1ebft b\u1ecb UL 489 \u1edf th\u01b0\u1ee3ng l\u01b0u.<\/p><\/blockquote>\n<p><strong>Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ea7n xem x\u00e9t:<\/strong><\/p>\n<table>\n<tbody>\n<tr>\n<th>T\u1ed1<\/th>\n<th>Nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 UL 489<\/th>\n<th>Nh\u1eefng c\u00e2n nh\u1eafc v\u1ec1 UL 1077<\/th>\n<\/tr>\n<tr>\n<td><strong>Hi\u1ec7n T\u1ea1i Gi\u00e1<\/strong><\/td>\n<td>T\u1ea3i ph\u00f9 h\u1ee3p v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u1ee7a d\u00e2y d\u1eabn<\/td>\n<td>Y\u00eau c\u1ea7u v\u1ec1 thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110i\u1ec7n \u0110\u00e1nh Gi\u00e1<\/strong><\/td>\n<td>\u0110i\u1ec7n \u00e1p h\u1ec7 th\u1ed1ng ph\u00f9 h\u1ee3p<\/td>\n<td>M\u1ea1ch \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n \u00e1p ph\u00f9 h\u1ee3p<\/td>\n<\/tr>\n<tr>\n<td><strong>Kh\u1ea3 n\u0103ng ng\u1eaft<\/strong><\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n l\u1ed7i c\u00f3 s\u1eb5n<\/td>\n<td>Xem x\u00e9t kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110\u1eb7c \u0111i\u1ec3m chuy\u1ebfn \u0111i<\/strong><\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i t\u1ea3i v\u00e0 d\u00f2ng \u0111i\u1ec7n kh\u1edfi \u0111\u1ed9ng<\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u b\u1ea3o v\u1ec7 th\u00e0nh ph\u1ea7n<\/td>\n<\/tr>\n<tr>\n<td><strong>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/strong><\/td>\n<td>Xem x\u00e9t m\u00f4i tr\u01b0\u1eddng b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/td>\n<td>Xem x\u00e9t m\u00f4i tr\u01b0\u1eddng thi\u1ebft b\u1ecb<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"ast-oembed-container\" style=\"height: 100%;\"><iframe title=\"MCB UL 489 so v\u1edbi UL 1077 trong t\u1ee7 \u0111i\u1ec1u khi\u1ec3n \u0111i\u1ec7n c\u00f4ng nghi\u1ec7p | c3controls\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/qEwP_F1IL8Q?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/div>\n<h2>M\u00e3 Ph\u00f9 h\u1ee3p v\u00e0 y\u00eau C\u1ea7u An to\u00e0n<\/h2>\n<h3>Y\u00eau C\u1ea7u \u0111\u01b0\u1ee3c ...<\/h3>\n<p><strong>Tu\u00e2n th\u1ee7 UL 489:<\/strong><\/p>\n<ul>\n<li>Ph\u1ea3i tu\u00e2n th\u1ee7 \u0110i\u1ec1u 240 c\u1ee7a NEC<\/li>\n<li>C\u1ea7n thi\u1ebft cho b\u1ea3o v\u1ec7 qu\u00e1 d\u00f2ng<\/li>\n<li>Ph\u1ea3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea v\u00e0 d\u00e1n nh\u00e3n<\/li>\n<li>C\u00e0i \u0111\u1eb7t theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<li>Ph\u1ed1i h\u1ee3p \u0111\u00fang c\u00e1ch v\u1edbi nh\u1ea1c tr\u01b0\u1edfng<\/li>\n<\/ul>\n<p><strong>Tu\u00e2n th\u1ee7 UL 1077:<\/strong><\/p>\n<ul>\n<li>Kh\u00f4ng th\u1ec3 l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n b\u1ea3o v\u1ec7 duy nh\u1ea5t<\/li>\n<li>Ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u1edbi b\u1ea3o v\u1ec7 UL 489<\/li>\n<li>Y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb<\/li>\n<li>Y\u00eau c\u1ea7u v\u1ec1 \u0111\u00e1nh d\u1ea5u v\u00e0 d\u00e1n nh\u00e3n<\/li>\n<li>Kh\u00f4ng \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn \u0111\u1ec3 b\u1ea3o v\u1ec7 m\u1ea1ch nh\u00e1nh<\/li>\n<\/ul>\n<h3>C\u00e2n nh\u1eafc v\u1ec1 an to\u00e0n<\/h3>\n<blockquote><p><strong>\u26a0\ufe0f C\u1ea3nh b\u00e1o an to\u00e0n quan tr\u1ecdng:<\/strong> Thi\u1ebft b\u1ecb UL 1077 kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m tra c\u00f9ng m\u1ee9c d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 nh\u01b0 thi\u1ebft b\u1ecb UL 489. S\u1eed d\u1ee5ng ch\u00fang kh\u00f4ng \u0111\u00fang c\u00e1ch c\u00f3 th\u1ec3 g\u00e2y ra h\u1ecfa ho\u1ea1n, h\u01b0 h\u1ecfng thi\u1ebft b\u1ecb ho\u1eb7c th\u01b0\u01a1ng t\u00edch c\u00e1 nh\u00e2n.<\/p><\/blockquote>\n<p><strong>C\u00e0i \u0110\u1eb7t Chuy\u00ean Nghi\u1ec7p Y\u00eau C\u1ea7u:<\/strong><\/p>\n<ul>\n<li>C\u1ea3 hai ti\u00eau chu\u1ea9n \u0111\u1ec1u y\u00eau c\u1ea7u ph\u1ea3i \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t b\u1edfi th\u1ee3 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9<\/li>\n<li>Ph\u1ea3i tu\u00e2n th\u1ee7 \u0111\u00fang th\u00f4ng s\u1ed1 m\u00f4-men xo\u1eafn<\/li>\n<li>C\u1ea7n \u0111\u00e1nh gi\u00e1 nguy c\u01a1 h\u1ed3 quang \u0111i\u1ec7n<\/li>\n<li>Nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t cho c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p<\/li>\n<\/ul>\n<h2>H\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec<\/h2>\n<h3>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 l\u1eafp \u0111\u1eb7t UL 489<\/h3>\n<p><strong>C\u00e0i \u0111\u1eb7t t\u1eebng b\u01b0\u1edbc:<\/strong><\/p>\n<ol>\n<li><strong>X\u00e1c minh T\u1eaft ngu\u1ed3n:<\/strong> X\u00e1c nh\u1eadn ngu\u1ed3n \u0111i\u1ec7n \u0111\u00e3 \u0111\u01b0\u1ee3c ng\u1eaft v\u00e0 kh\u00f3a<\/li>\n<li><strong>Ki\u1ec3m tra kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch:<\/strong> \u0110\u1ea3m b\u1ea3o b\u1ed9 ng\u1eaft m\u1ea1ch ph\u00f9 h\u1ee3p v\u1edbi nh\u00e0 s\u1ea3n xu\u1ea5t v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea3ng \u0111i\u1ec1u khi\u1ec3n<\/li>\n<li><strong>Ki\u1ec3m tra k\u1ebft n\u1ed1i:<\/strong> X\u00e1c minh k\u00edch th\u01b0\u1edbc d\u00e2y v\u00e0 m\u00f4-men xo\u1eafn k\u1ebft n\u1ed1i ph\u00f9 h\u1ee3p<\/li>\n<li><strong>Ho\u1ea1t \u0111\u1ed9ng th\u1eed nghi\u1ec7m:<\/strong> Th\u1ef1c hi\u1ec7n ki\u1ec3m tra v\u1eadn h\u00e0nh th\u1ee7 c\u00f4ng tr\u01b0\u1edbc khi c\u1ea5p \u0111i\u1ec7n<\/li>\n<li><strong>C\u00e0i \u0111\u1eb7t t\u00e0i li\u1ec7u:<\/strong> Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt v\u00e0 c\u00e0i \u0111\u1eb7t ph\u00e1 k\u1ef7 l\u1ee5c<\/li>\n<\/ol>\n<h3>Th\u1ef1c h\u00e0nh t\u1ed1t nh\u1ea5t v\u1ec1 l\u1eafp \u0111\u1eb7t UL 1077<\/h3>\n<p><strong>C\u00e0i \u0111\u1eb7t t\u1eebng b\u01b0\u1edbc:<\/strong><\/p>\n<ol>\n<li><strong>X\u00e1c minh b\u1ea3o v\u1ec7 ch\u00ednh:<\/strong> X\u00e1c nh\u1eadn b\u1ea3o v\u1ec7 UL 489 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u0111\u00fang c\u00e1ch \u1edf th\u01b0\u1ee3ng ngu\u1ed3n<\/li>\n<li><strong>Ki\u1ec3m tra x\u1ebfp h\u1ea1ng thi\u1ebft b\u1ecb:<\/strong> \u0110\u1ea3m b\u1ea3o b\u1ed9 b\u1ea3o v\u1ec7 b\u1ed5 sung ph\u00f9 h\u1ee3p v\u1edbi y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb<\/li>\n<li><strong>L\u1eafp \u0111\u1eb7t an to\u00e0n:<\/strong> C\u00e0i \u0111\u1eb7t theo h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<li><strong>X\u00e1c minh s\u1ef1 ph\u1ed1i h\u1ee3p:<\/strong> X\u00e1c nh\u1eadn s\u1ef1 ph\u1ed1i h\u1ee3p th\u00edch h\u1ee3p v\u1edbi b\u1ea3o v\u1ec7 th\u01b0\u1ee3ng ngu\u1ed3n<\/li>\n<li><strong>Ch\u1ee9c n\u0103ng ki\u1ec3m tra:<\/strong> Th\u1ef1c hi\u1ec7n ki\u1ec3m tra ho\u1ea1t \u0111\u1ed9ng trong h\u1ec7 th\u1ed1ng thi\u1ebft b\u1ecb<\/li>\n<\/ol>\n<h2>S\u1ef1 C\u1ed1 V\u1ea5n \u0110\u1ec1 Chung<\/h2>\n<h3>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 UL 489<\/h3>\n<p><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p:<\/strong><\/p>\n<ul>\n<li>S\u1ef1 c\u1ed1 b\u1ea5t ng\u1edd: Ki\u1ec3m tra k\u1ebft n\u1ed1i l\u1ecfng l\u1ebbo ho\u1eb7c qu\u00e1 t\u1ea3i<\/li>\n<li>Kh\u00f4ng \u0111\u1eb7t l\u1ea1i: X\u00e1c minh l\u1ed7i \u0111\u00e3 \u0111\u01b0\u1ee3c x\u00f3a v\u00e0 b\u1ed9 ng\u1eaft m\u1ea1ch kh\u00f4ng b\u1ecb h\u1ecfng<\/li>\n<li>Qu\u00e1 nhi\u1ec7t: Ki\u1ec3m tra th\u00f4ng s\u1ed1 m\u00f4-men xo\u1eafn v\u00e0 k\u00edch th\u01b0\u1edbc d\u00e2y d\u1eabn<\/li>\n<li>S\u1ef1 c\u1ed1 h\u1ed3 quang \u0111i\u1ec7n: \u0110\u1ea3m b\u1ea3o s\u1ef1 ph\u1ed1i h\u1ee3p v\u00e0 b\u1ea3o tr\u00ec ph\u00f9 h\u1ee3p<\/li>\n<\/ul>\n<h3>Kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 UL 1077<\/h3>\n<p><strong>C\u00e1c v\u1ea5n \u0111\u1ec1 th\u01b0\u1eddng g\u1eb7p:<\/strong><\/p>\n<ul>\n<li>Ho\u1ea1t \u0111\u1ed9ng th\u01b0\u1eddng xuy\u00ean: Ki\u1ec3m tra xem thi\u1ebft b\u1ecb c\u00f3 qu\u00e1 t\u1ea3i ho\u1eb7c tr\u1ee5c tr\u1eb7c kh\u00f4ng<\/li>\n<li>C\u00e1c v\u1ea5n \u0111\u1ec1 ph\u1ed1i h\u1ee3p: X\u00e1c minh m\u1ed1i quan h\u1ec7 ph\u00f9 h\u1ee3p v\u1edbi b\u1ea3o v\u1ec7 th\u01b0\u1ee3ng ngu\u1ed3n<\/li>\n<li>H\u1ecfng h\u00f3c s\u1edbm: \u0110\u1ea3m b\u1ea3o \u1ee9ng d\u1ee5ng v\u00e0 m\u00f4i tr\u01b0\u1eddng ph\u00f9 h\u1ee3p<\/li>\n<li>\u1ee8ng d\u1ee5ng kh\u00f4ng ch\u00ednh x\u00e1c: X\u00e1c minh kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 b\u1ea3o v\u1ec7 ch\u00ednh<\/li>\n<\/ul>\n<h2>\u0110\u1ec1 Ngh\u1ecb Chuy\u00ean Nghi\u1ec7p<\/h2>\n<h3>Khi n\u00e0o n\u00ean tham kh\u1ea3o \u00fd ki\u1ebfn chuy\u00ean gia<\/h3>\n<p><strong>T\u01b0 v\u1ea5n chuy\u00ean m\u00f4n b\u1eaft bu\u1ed9c:<\/strong><\/p>\n<ul>\n<li>Ph\u00e2n t\u00edch nguy c\u01a1 h\u1ed3 quang \u0111i\u1ec7n<\/li>\n<li>Nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p<\/li>\n<li>T\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n l\u1ed7i<\/li>\n<li>X\u00e1c minh tu\u00e2n th\u1ee7 m\u00e3<\/li>\n<li>Thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p<\/li>\n<\/ul>\n<blockquote><p><strong>\ud83d\udca1 Chuy\u00ean Gia M\u1eb9o:<\/strong> Lu\u00f4n c\u00f3 m\u1ed9t k\u1ef9 s\u01b0 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9 th\u1ef1c hi\u1ec7n nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p khi k\u1ebft h\u1ee3p c\u00e1c thi\u1ebft b\u1ecb UL 489 v\u00e0 UL 1077 trong c\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p.<\/p><\/blockquote>\n<h3>C\u00e1c y\u1ebfu t\u1ed1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 tin c\u1eady<\/h3>\n<p><strong>L\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb ch\u1ea5t l\u01b0\u1ee3ng:<\/strong><\/p>\n<ul>\n<li>Ch\u1ec9 ch\u1ecdn c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c UL li\u1ec7t k\u00ea<\/li>\n<li>Ch\u1ecdn nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 th\u00e0nh l\u1eadp<\/li>\n<li>X\u00e1c minh x\u1ebfp h\u1ea1ng v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ph\u00f9 h\u1ee3p<\/li>\n<li>Xem x\u00e9t kh\u1ea3 n\u0103ng cung c\u1ea5p l\u00e2u d\u00e0i<\/li>\n<li>\u0110\u00e1nh gi\u00e1 h\u1ed7 tr\u1ee3 c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t<\/li>\n<\/ul>\n<h2>Nhanh H\u01b0\u1edbng D\u1eabn Tham Kh\u1ea3o<\/h2>\n<h3>Th\u00f4ng tin nhanh v\u1ec1 UL 489<\/h3>\n<ul>\n<li><strong>M\u1ee5c \u0111\u00edch:<\/strong> B\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh<\/li>\n<li><strong>V\u1ecb tr\u00ed:<\/strong> T\u1ee7 \u0111i\u1ec7n, t\u1ee7 ph\u00e2n ph\u1ed1i, t\u1ee7 \u0111i\u1ec1u khi\u1ec3n trung t\u00e2m (MCC)<\/li>\n<li><strong>X\u1ebfp h\u1ea1ng:<\/strong> 15A \u0111\u1ebfn 6000A<\/li>\n<li><strong>Ng\u1eaft l\u1eddi:<\/strong> L\u00ean \u0111\u1ebfn 200kA<\/li>\n<li><strong>M\u00e3 s\u1ed1:<\/strong> Tu\u00e2n th\u1ee7 \u0110i\u1ec1u 240 c\u1ee7a NEC<\/li>\n<\/ul>\n<h3>Th\u00f4ng tin nhanh v\u1ec1 UL 1077<\/h3>\n<ul>\n<li><strong>M\u1ee5c \u0111\u00edch:<\/strong> B\u1ea3o v\u1ec7 b\u1ed5 sung<\/li>\n<li><strong>V\u1ecb tr\u00ed:<\/strong> Trong thi\u1ebft b\u1ecb \u0111i\u1ec7n<\/li>\n<li><strong>X\u1ebfp h\u1ea1ng:<\/strong> Th\u00f4ng th\u01b0\u1eddng l\u00e0 0,5A \u0111\u1ebfn 63A<\/li>\n<li><strong>Ng\u1eaft l\u1eddi:<\/strong> Th\u00f4ng th\u01b0\u1eddng l\u00ean \u0111\u1ebfn 10kA<\/li>\n<li><strong>M\u00e3 s\u1ed1:<\/strong> Ph\u1ea3i c\u00f3 UL 489 ng\u01b0\u1ee3c d\u00f2ng<\/li>\n<\/ul>\n<h2>Nh\u1eefng C\u00e2u H\u1ecfi Th\u01b0\u1eddng<\/h2>\n<h3>\u0110i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa UL 489 v\u00e0 UL 1077 v\u1ec1 m\u1eb7t an to\u00e0n l\u00e0 g\u00ec?<\/h3>\n<p>C\u00e1c b\u1ed9 ng\u1eaft m\u1ea1ch UL 489 tr\u1ea3i qua qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m r\u1ed9ng r\u00e3i cho c\u00e1c \u1ee9ng d\u1ee5ng b\u1ea3o v\u1ec7 ch\u00ednh, bao g\u1ed3m th\u1eed nghi\u1ec7m ng\u1eaft d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 cao v\u00e0 th\u1eed nghi\u1ec7m \u0111\u1ed9 b\u1ec1n. C\u00e1c b\u1ed9 b\u1ea3o v\u1ec7 b\u1ed5 sung UL 1077 \u0111\u01b0\u1ee3c th\u1eed nghi\u1ec7m cho c\u00e1c \u1ee9ng d\u1ee5ng thi\u1ebft b\u1ecb c\u1ee5 th\u1ec3 c\u00f3 y\u00eau c\u1ea7u d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 th\u1ea5p h\u01a1n v\u00e0 kh\u00f4ng th\u1ec3 cung c\u1ea5p c\u00f9ng m\u1ee9c \u0111\u1ed9 b\u1ea3o v\u1ec7.<\/p>\n<h3>T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb UL 1077 \u0111\u1ec3 thay th\u1ebf c\u1ea7u dao UL 489 kh\u00f4ng?<\/h3>\n<p>Kh\u00f4ng, \u0111i\u1ec1u n\u00e0y kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn v\u00e0 vi ph\u1ea1m c\u00e1c quy \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec7n. C\u00e1c thi\u1ebft b\u1ecb UL 1077 l\u00e0 c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 b\u1ed5 sung ph\u1ea3i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1ed5 sung, ch\u1ee9 kh\u00f4ng ph\u1ea3i thay th\u1ebf, cho c\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 ch\u00ednh UL 489.<\/p>\n<h3>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh kh\u1ea3 n\u0103ng ng\u1eaft ch\u00ednh x\u00e1c cho t\u1eebng ti\u00eau chu\u1ea9n?<\/h3>\n<p>\u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb UL 489, h\u00e3y t\u00ednh to\u00e1n d\u00f2ng \u0111i\u1ec7n s\u1ef1 c\u1ed1 kh\u1ea3 d\u1ee5ng t\u1ea1i \u0111i\u1ec3m l\u1eafp \u0111\u1eb7t v\u00e0 ch\u1ecdn c\u1ea7u dao c\u00f3 kh\u1ea3 n\u0103ng ng\u1eaft d\u00f2ng t\u01b0\u01a1ng \u0111\u01b0\u01a1ng ho\u1eb7c l\u1edbn h\u01a1n. \u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb UL 1077, h\u00e3y xem x\u00e9t \u0111\u1ecbnh m\u1ee9c ch\u1ecbu \u0111\u1ef1ng c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 \u0111\u1ea3m b\u1ea3o thi\u1ebft b\u1ecb UL 489 \u0111\u1ea7u v\u00e0o cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<h3>C\u00f3 y\u00eau c\u1ea7u ch\u1ea5m \u0111i\u1ec3m c\u1ee5 th\u1ec3 n\u00e0o cho t\u1eebng ti\u00eau chu\u1ea9n kh\u00f4ng?<\/h3>\n<p>C\u00f3, c\u00e1c thi\u1ebft b\u1ecb UL 489 ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u l\u00e0 \u201cC\u1ea7u dao\u201d v\u00e0 bao g\u1ed3m c\u00e1c \u0111\u1ecbnh m\u1ee9c, trong khi c\u00e1c thi\u1ebft b\u1ecb UL 1077 ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u l\u00e0 \u201cB\u1ed9 b\u1ea3o v\u1ec7 b\u1ed5 sung\u201d v\u00e0 bao g\u1ed3m c\u00e1c c\u1ea3nh b\u00e1o ph\u00f9 h\u1ee3p v\u1ec1 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee7a ch\u00fang.<\/p>\n<h3>H\u1eadu qu\u1ea3 c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n sai l\u00e0 g\u00ec?<\/h3>\n<p>Vi\u1ec7c s\u1eed d\u1ee5ng thi\u1ebft b\u1ecb UL 1077 l\u00e0m bi\u1ec7n ph\u00e1p b\u1ea3o v\u1ec7 ch\u00ednh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn vi\u1ec7c b\u1ea3o v\u1ec7 l\u1ed7i kh\u00f4ng \u0111\u1ea7y \u0111\u1ee7, vi ph\u1ea1m quy \u0111\u1ecbnh, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 b\u1ea3o hi\u1ec3m, nguy c\u01a1 h\u1ecfa ho\u1ea1n v\u00e0 kh\u1ea3 n\u0103ng g\u00e2y th\u01b0\u01a1ng t\u00edch c\u00e1 nh\u00e2n. Lu\u00f4n s\u1eed d\u1ee5ng ti\u00eau chu\u1ea9n ph\u00f9 h\u1ee3p cho t\u1eebng \u1ee9ng d\u1ee5ng.<\/p>\n<h3>Thi\u1ebft b\u1ecb c\u1ee7a t\u1eebng ti\u00eau chu\u1ea9n c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean nh\u01b0 th\u1ebf n\u00e0o?<\/h3>\n<p>C\u00e1c thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch UL 489 trong c\u00e1c \u1ee9ng d\u1ee5ng quan tr\u1ecdng c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra h\u00e0ng n\u0103m v\u00e0 th\u1eed nghi\u1ec7m 3-5 n\u0103m m\u1ed9t l\u1ea7n. C\u00e1c thi\u1ebft b\u1ecb b\u1ea3o v\u1ec7 b\u1ed5 sung UL 1077 c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a l\u1ecbch tr\u00ecnh b\u1ea3o tr\u00ec thi\u1ebft b\u1ecb, th\u01b0\u1eddng l\u00e0 h\u00e0ng n\u0103m ho\u1eb7c theo khuy\u1ebfn ngh\u1ecb c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/p>\n<h3>C\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u1ea3 hai ti\u00eau chu\u1ea9n c\u00f9ng nhau trong c\u00f9ng m\u1ed9t h\u1ec7 th\u1ed1ng kh\u00f4ng?<\/h3>\n<p>C\u00f3, \u0111i\u1ec1u n\u00e0y r\u1ea5t ph\u1ed5 bi\u1ebfn v\u00e0 th\u01b0\u1eddng c\u1ea7n thi\u1ebft. Thi\u1ebft b\u1ecb UL 489 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 ch\u00ednh, trong khi thi\u1ebft b\u1ecb UL 1077 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 b\u1ed5 sung b\u00ean trong thi\u1ebft b\u1ecb. S\u1ef1 ph\u1ed1i h\u1ee3p ph\u00f9 h\u1ee3p gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 \u0111\u1ea1t hi\u1ec7u su\u1ea5t t\u1ed1i \u01b0u.<\/p>\n<h3>C\u1ea7n \u0111\u00e0o t\u1ea1o g\u00ec \u0111\u1ec3 l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec?<\/h3>\n<p>C\u1ea3 hai ti\u00eau chu\u1ea9n \u0111\u1ec1u y\u00eau c\u1ea7u vi\u1ec7c l\u1eafp \u0111\u1eb7t ph\u1ea3i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1edfi th\u1ee3 \u0111i\u1ec7n c\u00f3 tr\u00ecnh \u0111\u1ed9 chuy\u00ean m\u00f4n, \u0111\u01b0\u1ee3c \u0111\u00e0o t\u1ea1o v\u00e0 c\u1ea5p ch\u1ee9ng ch\u1ec9 ph\u00f9 h\u1ee3p. C\u00e1c h\u1ec7 th\u1ed1ng ph\u1ee9c t\u1ea1p c\u00f3 th\u1ec3 c\u1ea7n \u0111\u00e0o t\u1ea1o th\u00eam v\u1ec1 nghi\u00ean c\u1ee9u ph\u1ed1i h\u1ee3p v\u00e0 an to\u00e0n h\u1ed3 quang \u0111i\u1ec7n.<\/p>\n<h2>K\u1ebft lu\u1eadn<\/h2>\n<p>Hi\u1ec3u \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa UL 489 v\u00e0 UL 1077 l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi an to\u00e0n \u0111i\u1ec7n v\u00e0 tu\u00e2n th\u1ee7 quy \u0111\u1ecbnh. C\u1ea7u dao UL 489 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 \u0111i\u1ec7n ch\u00ednh trong t\u1ee7 \u0111i\u1ec7n v\u00e0 b\u1ea3ng \u0111i\u1ec7n, trong khi c\u1ea7u dao b\u1ed5 sung UL 1077 cung c\u1ea5p kh\u1ea3 n\u0103ng b\u1ea3o v\u1ec7 b\u1ed5 sung b\u00ean trong thi\u1ebft b\u1ecb \u0111i\u1ec7n. Tuy\u1ec7t \u0111\u1ed1i kh\u00f4ng thay th\u1ebf c\u1ea7u dao n\u00e0y b\u1eb1ng c\u1ea7u dao kia v\u00e0 lu\u00f4n \u0111\u1ea3m b\u1ea3o s\u1ef1 ph\u1ed1i h\u1ee3p ph\u00f9 h\u1ee3p khi s\u1eed d\u1ee5ng c\u1ea3 hai ti\u00eau chu\u1ea9n trong c\u00f9ng m\u1ed9t h\u1ec7 th\u1ed1ng.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Direct Answer: UL 489 covers molded-case circuit breakers and switches used as main electrical protection in panels and switchboards, while UL 1077 covers supplementary protectors used within electrical equipment for component-level protection. The key difference is UL 489 devices provide primary electrical protection, while UL 1077 devices provide secondary protection.Understanding these two critical UL standards [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":18761,"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-18503","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\/18503","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=18503"}],"version-history":[{"count":0,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/posts\/18503\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media\/18761"}],"wp:attachment":[{"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/media?parent=18503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/categories?post=18503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.viox.com\/vi\/wp-json\/wp\/v2\/tags?post=18503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}