{"id":1156,"date":"2021-08-13T04:00:33","date_gmt":"2021-08-13T04:00:33","guid":{"rendered":"https:\/\/toancau.vn\/?p=1156"},"modified":"2025-04-17T09:04:31","modified_gmt":"2025-04-17T09:04:31","slug":"nguyen-ly-lam-viec-cua-chong-set-van","status":"publish","type":"post","link":"https:\/\/toancau.vn\/en\/blog\/nguyen-ly-lam-viec-cua-chong-set-van.html","title":{"rendered":"WORKING PRINCIPLE OF A LIGHTNING PROTECTION VALVE"},"content":{"rendered":"<p><span style=\"color: #0000ff;\"><strong>Ch\u1ed1ng s\u00e9t van<\/strong><\/span> <span style=\"color: #000000;\">l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t ho\u00e0n h\u1ea3o nh\u1ea5t d\u00f9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 cho tr\u1ea1m bi\u1ebfn \u00e1p, tr\u1ea1m ph\u00e2n ph\u1ed1i v\u00e0 c\u00e1c m\u00e1y \u0111i\u1ec7n kh\u00e1c.<\/span><\/p>\n<div id=\"toc_container\" class=\"no_bullets\"><p class=\"toc_title\">Table of Contents<\/p><ul class=\"toc_list\"><li><a href=\"#Cau_tao_cua_chong_set_van_gom_hai_phan\"><span class=\"toc_number toc_depth_1\">1<\/span> The structure of a lightning arrester valve consists of two parts:<\/a><\/li><li><a href=\"#Nguyen_ly_hoat_dong_cua_chong_set_van_chu_yeu_phu_thuoc_vao_tinh_chat_cua_dien_tro_Vilit\"><span class=\"toc_number toc_depth_1\">2<\/span> Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ed1ng s\u00e9t van ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a \u0111i\u1ec7n tr\u1edf Vilit:<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Cau_tao_cua_chong_set_van_gom_hai_phan\"><strong>The structure of a lightning arrester valve consists of two parts:<\/strong><\/span><\/h2>\n<p><span style=\"color: #000000;\">\u2013 On the outside is an insulating ceramic or plastic tube, the shape, and size of which are determined by the rated voltage level.\u00a0<\/span><br \/>\n<span style=\"color: #000000;\">\u2013 The inside of the tube contains two main elements, the discharge gap and the nonlinear resistance<\/span><br \/>\n<img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter wp-image-3774\" src=\"https:\/\/toancau.vn\/wp-content\/uploads\/2021\/08\/Chong-set-van-707x707-2-300x300.png\" alt=\"\" width=\"520\" height=\"520\"><\/p>\n<p>&#8211;<span style=\"color: #000000;\">\u2014 The discharge gap consists of multiple pairs of gap couplings in series. Each pair of openings is made by two thin copper plates. In the middle is a mica pad or insulating board about 1mm thick to create a discharge gap. Each arrester valve has a number of pairs of discharge gaps depending on the design manufacturer.<\/span><br \/>\n<span style=\"color: #000000;\">\u2014 Nonlinear resistors consisting of circular, cylindrical plates connected in series. Nonlinear resistance can be Vilit, Tirit, or Tirit or ZnO\u2026 (usually Vilit)<\/span><\/p>\n<h2><span id=\"Nguyen_ly_hoat_dong_cua_chong_set_van_chu_yeu_phu_thuoc_vao_tinh_chat_cua_dien_tro_Vilit\"><span style=\"color: #000000;\"><strong>Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ed1ng s\u00e9t van ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o t\u00ednh ch\u1ea5t c\u1ee7a \u0111i\u1ec7n tr\u1edf Vilit:<\/strong><\/span><\/span><\/h2>\n<p><span style=\"color: #000000;\">Khi \u0111i\u1ec7n \u00e1p \u0111\u1eb7t l\u00ean Vilit t\u0103ng cao th\u00ec gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf c\u1ee7a n\u00f3 gi\u1ea3m v\u00e0 ng\u01b0\u1ee3c l\u1ea1i khi \u0111i\u1ec7n \u00e1p gi\u1ea3m xu\u1ed1ng th\u00ec \u0111i\u1ec7n tr\u1edf s\u1ebd t\u0103ng l\u00ean nhanh ch\u00f3ng.<\/span><\/p>\n<p><span style=\"color: #000000;\">When there is an overvoltage applied to the lightning arrester, the resistance of the lightning arrester is quickly lowered to facilitate the removal of all lightning waves through it to the ground. The resistance of the surge arrester is greatly increased, terminating the continuity line at the most appropriate time.<\/span><\/p>\n<p><span style=\"color: #000000;\">At the same time, during a lightning discharge, the residual voltage on the arrester valve is also small, this will ensure the safety of the protected equipment.<\/span><\/p>\n<p><span style=\"color: #000000;\"><strong>Ch\u1ed1ng s\u00e9t van c\u00f3 \u0111\u1eb7c t\u00ednh t\u00e1c \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i b\u1eb1ng ph\u1eb3ng<\/strong> n\u00ean ch\u1ed1ng s\u00e9t van kh\u00f4ng nh\u1eefng c\u00f3 t\u00e1c d\u1ee5ng h\u1ea1 th\u1ea5p bi\u00ean \u0111\u1ed9 m\u00e0 c\u00f2n l\u00e0m gi\u1ea3m \u0111\u1ed9 d\u1ed1c c\u1ee7a s\u00f3ng s\u00e9t. V\u00ec th\u1ebf, n\u00f3 c\u00f3 th\u1ec3 b\u1ea3o v\u1ec7 ch\u1ed1ng \u0111\u01b0\u1ee3c hi\u1ec7n t\u01b0\u1ee3ng xuy\u00ean k\u00edch gi\u1eefa c\u00e1c v\u00f2ng d\u00e2y trong c\u00f9ng m\u1ed9t pha c\u1ee7a c\u00e1c m\u00e1y \u0111i\u1ec7n.<\/span><\/p>\n<p><span style=\"color: #000000;\">Vilit resistors are susceptible to moisture, which will change electrical characteristics and make the valve lightning arrester ineffective, so it is necessary to take measures against moisture for Vilit resistors.<\/span><\/p>","protected":false},"excerpt":{"rendered":"<p>Ch\u1ed1ng s\u00e9t van l\u00e0 m\u1ed9t thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t ho\u00e0n h\u1ea3o nh\u1ea5t d\u00f9ng \u0111\u1ec3 b\u1ea3o v\u1ec7 cho tr\u1ea1m bi\u1ebfn \u00e1p, tr\u1ea1m ph\u00e2n ph\u1ed1i v\u00e0 c\u00e1c m\u00e1y \u0111i\u1ec7n kh\u00e1c. N\u1ed9i dung b&agrave;i vi\u1ebft1 C\u1ea5u t\u1ea1o c\u1ee7a ch\u1ed1ng s\u00e9t van g\u1ed3m hai ph\u1ea7n:2 Nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng c\u1ee7a ch\u1ed1ng s\u00e9t van ch\u1ee7 y\u1ebfu ph\u1ee5 thu\u1ed9c v\u00e0o t\u00ednh [&hellip;]<\/p>","protected":false},"author":3,"featured_media":2827,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"footnotes":""},"categories":[16,7],"tags":[],"class_list":["post-1156","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-tin-tuc-su-kien"],"acf":[],"_links":{"self":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/comments?post=1156"}],"version-history":[{"count":2,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1156\/revisions"}],"predecessor-version":[{"id":8474,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1156\/revisions\/8474"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media\/2827"}],"wp:attachment":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media?parent=1156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/categories?post=1156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/tags?post=1156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}