{"id":5077,"date":"2025-09-13T00:00:00","date_gmt":"2025-09-13T00:00:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/knowledge-center\/lan-transformer-isolation-voltage-explained\/"},"modified":"2026-06-22T07:19:49","modified_gmt":"2026-06-22T07:19:49","slug":"lan-transformer-isolation-voltage-explained","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/lan-transformer-isolation-voltage-explained","title":{"rendered":"Hi\u1ec3u r\u00f5 \u0111i\u1ec7n \u00e1p c\u00e1ch ly trong c\u00e1c bi\u1ebfn \u00e1p LAN"},"content":{"rendered":"<figure class=\"wp-block-image aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c.webp\" alt=\"LAN Transformers Isolation Voltage\" class=\"wp-image-5074\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/a0d79fff2b884121ab3b1e5596287c2c-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf Gi\u1edbi thi\u1ec7u<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Khi c\u00e1c k\u1ef9 s\u01b0 \u0111\u00e1nh gi\u00e1 bi\u1ebfn \u00e1p LAN cho c\u00e1c \u1ee9ng d\u1ee5ng Ethernet, m\u1ed9t th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee5 th\u1ec3 lu\u00f4n xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u: <strong>\u0110i\u1ec7n \u00e1p c\u00e1ch ly<\/strong>. C\u0169ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111i\u1ec7n \u00e1p ch\u1ecbu \u0111i\u1ec7n m\u00f4i ho\u1eb7c x\u1ebfp h\u1ea1ng \u201cHi-Pot\u201d, th\u00f4ng s\u1ed1 n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n \u0111i\u1ec7n, tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n IEEE v\u00e0 \u0111\u1ed9 tin c\u1eady d\u00e0i h\u1ea1n. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta ph\u00e2n t\u00edch \u00fd ngh\u0129a c\u1ee7a \u0111i\u1ec7n \u00e1p c\u00e1ch ly, l\u00fd do <strong>1500 Vrms<\/strong> l\u00e0 ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c c\u00f4ng nh\u1eadn, v\u00e0 c\u00e1ch LINK-PP thi\u1ebft k\u1ebf <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm\">danh m\u1ee5c bi\u1ebfn \u00e1p LAN<\/a> \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u \u0111a d\u1ea1ng c\u1ee7a c\u00e1c \u1ee9ng d\u1ee5ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >\u25cf \u0110i\u1ec7n \u00e1p c\u00e1ch ly l\u00e0 g\u00ec?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec7n \u00e1p c\u00e1ch ly m\u00f4 t\u1ea3 \u0111i\u1ec7n \u00e1p xoay chi\u1ec1u t\u1ed1i \u0111a m\u00e0 r\u00e0o c\u1ea3n c\u00e1ch \u0111i\u1ec7n b\u00ean trong bi\u1ebfn \u00e1p LAN c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u1ef1ng \u0111\u01b0\u1ee3c gi\u1eefa cu\u1ed9n s\u01a1 c\u1ea5p (k\u1ebft n\u1ed1i v\u1edbi <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/glossary\/what-is-phy-physical-layer-basics-explained\/\">chip PHY<\/a> v\u00e0 bo m\u1ea1ch in PCB) v\u00e0 cu\u1ed9n th\u1ee9 c\u1ea5p (k\u1ebft n\u1ed1i v\u1edbi <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/store-17492-integrated-rj45-connector.htm\">RJ45<\/a>ph\u00eda c\u00e1p).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vi\u1ec7c c\u00e1ch ly n\u00e0y r\u1ea5t quan tr\u1ecdng v\u00ec:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><p><strong>B\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb<\/strong> \u2013 ng\u0103n \u0111i\u1ec7n \u00e1p xung ho\u1eb7c s\u1ef1 c\u1ed1 lan truy\u1ec1n \u0111\u1ebfn chip PHY Ethernet v\u00e0 g\u00e2y h\u01b0 h\u1ecfng m\u1ea1ch.<\/p><\/li><li><p><strong>B\u1ea3o v\u1ec7 con ng\u01b0\u1eddi<\/strong> \u2013 \u0111\u1ea3m b\u1ea3o an to\u00e0n ng\u01b0\u1eddi d\u00f9ng b\u1eb1ng c\u00e1ch ng\u0103n \u0111i\u1ec7n \u00e1p nguy hi\u1ec3m r\u00f2 r\u1ec9 v\u00e0o thi\u1ebft b\u1ecb m\u1ea1ng.<\/p><\/li><li><p><strong>Duy tr\u00ec \u0111\u1ed9 nguy\u00ean v\u1eb9n t\u00edn hi\u1ec7u<\/strong> \u2013 lo\u1ea1i b\u1ecf v\u00f2ng n\u1ed1i \u0111\u1ea5t v\u00e0 nhi\u1ec5u ch\u1ebf \u0111\u1ed9 chung, c\u1ea3i thi\u1ec7n hi\u1ec7u n\u0103ng Ethernet t\u1ed1c \u0111\u1ed9 cao.<\/p><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean th\u1ef1c t\u1ebf, \u0111i\u1ec7n \u00e1p c\u00e1ch ly \u0111\u01b0\u1ee3c ki\u1ec3m tra th\u00f4ng qua <strong>ph\u00e9p th\u1eed Hi-Pot<\/strong>, trong \u0111\u00f3 bi\u1ebfn \u00e1p ch\u1ecbu m\u1ed9t \u0111i\u1ec7n \u00e1p th\u1eed nghi\u1ec7m xoay chi\u1ec1u cao trong kho\u1ea3ng th\u1eddi gian x\u00e1c \u0111\u1ecbnh (th\u01b0\u1eddng l\u00e0 60 gi\u00e2y).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >Ti\u00eau chu\u1ea9n v\u00e0 tu\u00e2n th\u1ee7<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a target=\"_blank\" rel=\"\" href=\"https:\/\/resourceslp.szlogic.cn\/vi\/knowledge-center\/ieee-802-3-ethernet-standard-explained\/\"><strong>IEEE 802.3 Ethernet<br><\/strong><\/a> quy \u0111\u1ecbnh r\u1eb1ng c\u1ed5ng Ethernet ph\u1ea3i cung c\u1ea5p <strong>\u00edt nh\u1ea5t 1500 Vrms c\u00e1ch ly trong 60 gi\u00e2y<\/strong> gi\u1eefa m\u1ea1ch v\u00e0 ph\u00eda \u0111\u01b0\u1eddng d\u00e2y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c ti\u00eau chu\u1ea9n an to\u00e0n kh\u00e1c, nh\u01b0 <strong>IEC 60950-1<\/strong> and <strong>IEC 62368-1,<\/strong> c\u0169ng \u0111\u01b0a ra c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng t\u1ef1, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed th\u01b0\u01a1ng m\u1ea1i v\u00e0 c\u00f4ng nghi\u1ec7p. \u0110\u1ed1i v\u1edbi c\u00e1c m\u00f4i tr\u01b0\u1eddng \u0111\u00f2i h\u1ecfi kh\u1eaft khe h\u01a1n\u2014v\u00ed d\u1ee5 nh\u01b0 m\u1ea1ng ngo\u00e0i tr\u1eddi, c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng vi\u1ec5n th\u00f4ng ho\u1eb7c thi\u1ebft b\u1ecb y t\u1ebf\u2014c\u00e1c k\u1ef9 s\u01b0 c\u00f3 th\u1ec3 y\u00eau c\u1ea7u m\u1ee9c c\u00e1ch ly cao h\u01a1n (v\u00ed d\u1ee5: 2250 Vrms, 3000 Vrms ho\u1eb7c cao h\u01a1n) nh\u1eb1m \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u an to\u00e0n v\u00e0 quy \u0111\u1ecbnh b\u1ed5 sung.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" >H\u01b0\u1edbng d\u1eabn th\u1ef1c ti\u1ec5n d\u00e0nh cho k\u1ef9 s\u01b0<\/h2>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1200\" height=\"712\" src=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed.webp\" alt=\"LAN transformer Datasheet\" class=\"wp-image-5075\" srcset=\"https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed.webp 1200w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed-300x178.webp 300w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed-1024x608.webp 1024w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed-768x456.webp 768w, https:\/\/resourceslp.szlogic.cn\/wp-content\/uploads\/2026\/05\/06df124ca94a425f9a1309f76face7ed-18x12.webp 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Khi xem x\u00e9t m\u1ed9t bi\u1ebfn \u00e1p <a target=\"_blank\" rel=\"\" href=\"https:\/\/www.l-p.com\/file\/datasheet\/lp82487pnl-drawing.pdf\">b\u1ea3ng d\u1eef li\u1ec7u<\/a>, h\u00e3y lu\u00f4n x\u00e1c minh:<\/p>\n\n\n\n<ol class=\"wp-block-list\" >\n<li><p><strong>X\u1ebfp h\u1ea1ng \u0111i\u1ec7n \u00e1p c\u00e1ch ly (Vrms, th\u1eddi gian th\u1eed nghi\u1ec7m)<\/strong> \u2013 C\u00f3 \u0111\u00e1p \u1ee9ng y\u00eau c\u1ea7u IEEE kh\u00f4ng?<\/p><\/li><li><p><strong>Kho\u1ea3ng c\u00e1ch tr\u01b0\u1ee3t v\u00e0 kho\u1ea3ng c\u00e1ch h\u1edf \u2013 C\u00e1c quy t\u1eafc thi\u1ebft k\u1ebf PCB \u0111\u00e3 \u0111\u01b0\u1ee3c tu\u00e2n th\u1ee7 ch\u01b0a<\/strong>?<\/p><\/li><li><p><strong>\u0110i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng<\/strong> \u2013 \u0110\u1ed9 \u1ea9m, nhi\u1ec7t \u0111\u1ed9 ho\u1eb7c ngu\u1ed3n PoE c\u00f3 l\u00e0m suy gi\u1ea3m l\u1edbp c\u00e1ch \u0111i\u1ec7n kh\u00f4ng?<\/p><\/li><li><p><strong>Ch\u1ee9ng ch\u1ec9<\/strong> \u2013 S\u1ef1 tu\u00e2n th\u1ee7 UL, RoHS v\u00e0 ISO x\u00e1c nh\u1eadn kh\u1ea3 n\u0103ng s\u1eb5n s\u00e0ng cho th\u1ecb tr\u01b0\u1eddng to\u00e0n c\u1ea7u.<\/p><\/li><li><p><strong>Ph\u00f9 h\u1ee3p \u1ee9ng d\u1ee5ng<\/strong> \u2013 Ch\u1ecdn c\u00e1c m\u1eabu c\u00e1ch ly cao h\u01a1n cho thi\u1ebft k\u1ebf c\u00f4ng nghi\u1ec7p, vi\u1ec5n th\u00f4ng ho\u1eb7c ngo\u00e0i tr\u1eddi.<\/p><\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" >K\u1ebft lu\u1eadn<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110i\u1ec7n \u00e1p c\u00e1ch ly kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t con s\u1ed1 tr\u00ean b\u1ea3ng d\u1eef li\u1ec7u\u2014m\u00e0 c\u00f2n l\u00e0 h\u00e0ng r\u00e0o b\u1ea3o v\u1ec7 thi\u1ebft b\u1ecb, ng\u01b0\u1eddi d\u00f9ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng t\u00edn hi\u1ec7u. M\u1eb7c d\u00f9 <strong>C\u00e1ch ly 1500 Vrms<\/strong> \u0111\u1ee7 cho h\u1ea7u h\u1ebft c\u00e1c thi\u1ebft b\u1ecb Ethernet, nh\u01b0ng c\u00e1c \u1ee9ng d\u1ee5ng \u0111\u00f2i h\u1ecfi kh\u1eaft khe h\u01a1n c\u00f3 th\u1ec3 c\u1ea7n x\u1ebfp h\u1ea1ng cao h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi danh m\u1ee5c r\u1ed9ng r\u00e3i c\u00e1c <strong>B\u1ed9 bi\u1ebfn \u00e1p LAN<\/strong>, LINK-PP \u0111\u1ea3m b\u1ea3o tu\u00e2n th\u1ee7 IEEE 802.3 \u0111\u1ed3ng th\u1eddi cung c\u1ea5p cho c\u00e1c k\u1ef9 s\u01b0 c\u00e1c gi\u1ea3i ph\u00e1p hi\u1ec7u su\u1ea5t cao v\u1edbi chi ph\u00ed h\u1ee3p l\u00fd. D\u00f9 b\u1ea1n c\u1ea7n <strong>c\u00e1c linh ki\u1ec7n ti\u00eau chu\u1ea9n 1500 Vrms hay c\u00e1c m\u1eabu c\u00e1ch ly cao n\u00e2ng cao<\/strong>, LINK-PP \u0111\u1ec1u cung c\u1ea5p c\u00e1c th\u00e0nh ph\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf nh\u1eb1m \u0111\u1ea3m b\u1ea3o an to\u00e0n, \u0111\u1ed9 tin c\u1eady v\u00e0 hi\u1ec7u n\u0103ng m\u1ea1ng d\u00e0i h\u1ea1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 Kh\u00e1m ph\u00e1 to\u00e0n b\u1ed9 d\u00f2ng s\u1ea3n ph\u1ea9m <a target=\"_new\" rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/www.l-p.com\/store-17548-lan-transformer.htm?utm_source=chatgpt.com\">S\u1ea3n ph\u1ea9m bi\u1ebfn \u00e1p LAN<\/a> \u0111\u1ec3 t\u00ecm gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p nh\u1ea5t cho thi\u1ebft k\u1ebf Ethernet c\u1ee7a b\u1ea1n.<\/p>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u vai tr\u00f2 c\u1ee7a \u0111i\u1ec7n \u00e1p c\u00e1ch ly trong c\u00e1c bi\u1ebfn \u00e1p LAN, l\u00fd do ti\u00eau chu\u1ea9n IEEE 802.3 quy \u0111\u1ecbnh gi\u00e1 tr\u1ecb 1500 Vrms v\u00e0 c\u00e1ch c\u00e1c s\u1ea3n ph\u1ea9m LINK-PP \u0111\u1ea3m b\u1ea3o c\u00e1c k\u1ebft n\u1ed1i Ethernet an to\u00e0n, \u0111\u00e1ng tin c\u1eady.<\/p>","protected":false},"author":1,"featured_media":5076,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[23],"class_list":["post-5077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge-center","tag-link-pp-lan-transformers"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/comments?post=5077"}],"version-history":[{"count":4,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5077\/revisions"}],"predecessor-version":[{"id":11138,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/posts\/5077\/revisions\/11138"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media\/5076"}],"wp:attachment":[{"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/media?parent=5077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/categories?post=5077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/resourceslp.szlogic.cn\/vi\/wp-json\/wp\/v2\/tags?post=5077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}