{"id":1218,"date":"2025-06-12T02:59:14","date_gmt":"2025-06-11T19:59:14","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=1218"},"modified":"2025-06-12T03:04:26","modified_gmt":"2025-06-11T20:04:26","slug":"bien-dong-1005a-la-gi","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/","title":{"rendered":"Bi\u1ebfn d\u00f2ng 100\/5A l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng (ZCT)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/#Bien_dong_thu_tu_khong_ZCT_la_gi\" >Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng (ZCT) l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/#Dong_thu_tu_khong_la_gi\" >D\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/#Nguyen_ly_hoat_dong_cua_ZCT\" >Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ZCT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/#Chuc_nang_cua_bien_dong_thu_tu_khong_ZCT\" >Ch\u1ee9c n\u0103ng c\u1ee7a bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng ZCT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/bien-dong-1005a-la-gi\/#Bien_dong_1005A_trong_ZCT\" >Bi\u1ebfn d\u00f2ng 100\/5A trong ZCT<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Bien_dong_thu_tu_khong_ZCT_la_gi\"><\/span>Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng (ZCT) l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng, hay c\u00f2n g\u1ecdi l\u00e0 Zero Current Transformer (ZCT) ho\u1eb7c Core Balance Current Transformer, l\u00e0 m\u1ed9t lo\u1ea1i bi\u1ebfn d\u00f2ng \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n.  Khi th\u1ea5y k\u00fd hi\u1ec7u ZCT tr\u00ean m\u1ed9t bi\u1ebfn d\u00f2ng, \u0111\u00f3 ch\u00ednh l\u00e0 bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Dong_thu_tu_khong_la_gi\"><\/span>D\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng l\u00e0 d\u00f2ng \u0111i\u1ec7n t\u1ed5ng vect\u01a1 c\u1ee7a 3 pha. Trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n 3 pha s\u1eed d\u1ee5ng d\u00e2y trung t\u00ednh, d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng ch\u00ednh l\u00e0 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y trung t\u00ednh. N\u1ebfu t\u1ea3i kh\u00f4ng s\u1eed d\u1ee5ng d\u00e2y trung t\u00ednh, d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng l\u00fd t\u01b0\u1edfng b\u1eb1ng 0.<\/p>\n<p><em>H\u00ecnh \u1ea3nh: Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng ZCT<\/em><\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p c\u00e1ch ly d\u00e2y trung t\u00ednh, d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng l\u00e0 d\u00f2ng \u0111i\u1ec7n \u0111i qua d\u00e2y trung t\u00ednh xu\u1ed1ng \u0111\u1ea5t khi c\u00f3 s\u1ef1 c\u1ed1 trong h\u1ec7 d\u00e2y trung t\u00ednh n\u1ed1i \u0111\u1ea5t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Nguyen_ly_hoat_dong_cua_ZCT\"><\/span>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ZCT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>ZCT ho\u1ea1t \u0111\u1ed9ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd c\u1ea3m \u1ee9ng \u0111i\u1ec7n t\u1eeb.  N\u00f3 ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 b\u1eb1ng c\u00e1ch \u0111o t\u1eeb tr\u01b0\u1eddng t\u1ed5ng h\u1ee3p xung quanh c\u00e1c d\u00e2y d\u1eabn L1, L2, L3 v\u00e0 N. Khi c\u00f3 d\u00f2ng r\u00f2 (v\u00ed d\u1ee5 nh\u01b0 d\u00f2ng \u0111i\u1ec7n r\u00f2 xu\u1ed1ng \u0111\u1ea5t), t\u1eeb tr\u01b0\u1eddng t\u1ed5ng h\u1ee3p s\u1ebd thay \u0111\u1ed5i, t\u1ea1o ra \u0111i\u1ec7n \u00e1p c\u1ea3m \u1ee9ng trong ZCT.  \u0110i\u1ec7n \u00e1p n\u00e0y \u0111\u01b0\u1ee3c truy\u1ec1n \u0111\u1ebfn r\u01a1 le r\u00f2 \u0111i\u1ec7n (ELR &#8211; Earth Leakage Relay) \u0111\u1ec3 k\u00edch ho\u1ea1t ng\u1eaft m\u1ea1ch, b\u1ea3o v\u1ec7 an to\u00e0n cho ng\u01b0\u1eddi v\u00e0 thi\u1ebft b\u1ecb.<\/p>\n<p>C\u1ee5 th\u1ec3 h\u01a1n:<\/p>\n<ul>\n<li>ZCT l\u00e0 bi\u1ebfn d\u00f2ng Pha &#8211; Trung t\u00ednh (Zero-phase current Transformer).<\/li>\n<li>Khi c\u00f3 s\u1ef1 c\u1ed1 r\u00f2 \u0111i\u1ec7n ho\u1eb7c \u0111i\u1ec7n gi\u1eadt, ZCT s\u1ebd ph\u00e1t t\u00edn hi\u1ec7u v\u1ec1 ELR (R\u01a1 le r\u00f2 \u0111i\u1ec7n).<\/li>\n<li>V\u1ec1 m\u1eb7t v\u1eadt l\u00fd, nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ZCT d\u1ef1a tr\u00ean s\u1ef1 c\u1ea3m \u1ee9ng v\u1edbi t\u1eeb tr\u01b0\u1eddng xung quanh c\u00e1c d\u00e2y \u0111i\u1ec7n L1, L2, L3 v\u00e0 N.<\/li>\n<li>T\u1eeb tr\u01b0\u1eddng t\u1ed5ng h\u1ee3p c\u1ee7a 4 d\u00e2y \u0111i\u1ec7n n\u00e0y s\u1ebd kh\u00e1c nhau khi kh\u00f4ng c\u00f3 d\u00f2ng r\u00f2 v\u00e0 khi xu\u1ea5t hi\u1ec7n d\u00f2ng r\u00f2, d\u1eabn \u0111\u1ebfn \u0111i\u1ec7n \u00e1p c\u1ea3m \u1ee9ng trong ZCT c\u0169ng kh\u00e1c nhau.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Chuc_nang_cua_bien_dong_thu_tu_khong_ZCT\"><\/span>Ch\u1ee9c n\u0103ng c\u1ee7a bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng ZCT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a ZCT l\u00e0 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00e0 ng\u01b0\u1eddi s\u1eed d\u1ee5ng kh\u1ecfi c\u00e1c s\u1ef1 c\u1ed1 li\u00ean quan \u0111\u1ebfn d\u00f2ng r\u00f2, bao g\u1ed3m:<\/p>\n<ul>\n<li>Ph\u00f2ng ch\u1ed1ng \u0111i\u1ec7n gi\u1eadt t\u1eeb c\u1ea7u dao r\u00f2 r\u1ec9 \u0111i\u1ec7n xu\u1ed1ng \u0111\u1ea5t.<\/li>\n<li>Ng\u1eafn m\u1ea1ch r\u01a1 le.<\/li>\n<li>L\u1ed7i t\u1eeb b\u1ed9 ng\u1eaft m\u1ea1ch ch\u1eadm \u0111\u1ea5t.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Bien_dong_1005A_trong_ZCT\"><\/span>Bi\u1ebfn d\u00f2ng 100\/5A trong ZCT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Bi\u1ebfn d\u00f2ng 100\/5A th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c h\u1ec7 th\u1ed1ng ZCT. Con s\u1ed1 100\/5A th\u1ec3 hi\u1ec7n t\u1ef7 l\u1ec7 bi\u1ebfn d\u00f2ng, ngh\u0129a l\u00e0 d\u00f2ng \u0111i\u1ec7n s\u01a1 c\u1ea5p (d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn lu\u1ed3n qua ZCT) l\u00e0 100A s\u1ebd \u0111\u01b0\u1ee3c bi\u1ebfn \u0111\u1ed5i th\u00e0nh d\u00f2ng \u0111i\u1ec7n th\u1ee9 c\u1ea5p l\u00e0 5A. D\u00f2ng \u0111i\u1ec7n th\u1ee9 c\u1ea5p n\u00e0y nh\u1ecf h\u01a1n, an to\u00e0n h\u01a1n v\u00e0 d\u1ec5 d\u00e0ng x\u1eed l\u00fd b\u1edfi r\u01a1 le r\u00f2 \u0111i\u1ec7n.  Vi\u1ec7c s\u1eed d\u1ee5ng bi\u1ebfn d\u00f2ng 100\/5A hay c\u00e1c t\u1ef7 l\u1ec7 kh\u00e1c ph\u1ee5 thu\u1ed9c v\u00e0o d\u00f2ng \u0111i\u1ec7n \u0111\u1ecbnh m\u1ee9c c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n c\u1ea7n b\u1ea3o v\u1ec7.<\/p>\n<p><em>H\u00ecnh \u1ea3nh: Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng ZCT 100\/5A (v\u00ed d\u1ee5 minh h\u1ecda)<\/em><\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng (ZCT) l\u00e0 g\u00ec? Bi\u1ebfn d\u00f2ng th\u1ee9 t\u1ef1 kh\u00f4ng, hay c\u00f2n g\u1ecdi l\u00e0 Zero Current Transformer (ZCT) ho\u1eb7c Core Balance Current Transformer, l\u00e0 m\u1ed9t lo\u1ea1i bi\u1ebfn d\u00f2ng \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ph\u00e1t hi\u1ec7n d\u00f2ng r\u00f2 trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Khi th\u1ea5y k\u00fd hi\u1ec7u ZCT tr\u00ean m\u1ed9t bi\u1ebfn d\u00f2ng, \u0111\u00f3&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1218","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1218","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=1218"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1218\/revisions"}],"predecessor-version":[{"id":18165,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/1218\/revisions\/18165"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=1218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=1218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=1218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}