{"id":1140,"date":"2021-08-13T03:52:30","date_gmt":"2021-08-13T03:52:30","guid":{"rendered":"https:\/\/toancau.vn\/?p=1140"},"modified":"2025-04-17T08:59:24","modified_gmt":"2025-04-17T08:59:24","slug":"chon-thiet-bi-chong-set-lan-truyen-cho-duong-tin-hieu","status":"publish","type":"post","link":"https:\/\/toancau.vn\/en\/blog\/chon-thiet-bi-chong-set-lan-truyen-cho-duong-tin-hieu.html","title":{"rendered":"SELECTING LAN LIGHTNING PROTECTION DEVICES FOR SIGNAL LINES"},"content":{"rendered":"<p><span style=\"font-size: medium; color: #000000;\">To ensure that the cost of installing\u00a0<a style=\"color: #000000;\" href=\"https:\/\/toancau.vn\/en\/vietnam\/10\/12\/chong-set-lan-truyen\/\">surge protection devices<\/a>\u00a0for signal lines (for the protection of data, signal, and control circuits, etc.) is used effectively, there are 2 issues to:<\/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=\"#Thiet_bi_chong_set_lan_truyen_nen_duoc_lap_dat_o_dau\"><span class=\"toc_number toc_depth_1\">1<\/span> Where should surge arresters be installed?<\/a><\/li><li><a href=\"#Lam_sao_de_chon_thiet_bi_cho_mot_vi_tri_chi_dinh\"><span class=\"toc_number toc_depth_1\">2<\/span> How to select the device for a specified location?<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Thiet_bi_chong_set_lan_truyen_nen_duoc_lap_dat_o_dau\"><span style=\"font-size: medium; color: #000000;\"><strong>Where should surge arresters be installed?<\/strong><\/span><\/span><\/h2>\n<p><span style=\"font-size: medium; color: #000000;\">+ What type of surge arrester is suitable for each type of circuit and protection location?<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">+ Where should the surge protection device be installed?<\/span><\/p>\n<p><span style=\"color: #000000;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-3826 aligncenter\" src=\"https:\/\/toancau.vn\/wp-content\/uploads\/2021\/08\/chong-set-cho-duong-truyen-thiet-bi-300x176.png\" alt=\"\" width=\"472\" height=\"277\" srcset=\"https:\/\/toancau.vn\/wp-content\/uploads\/2021\/08\/chong-set-cho-duong-truyen-thiet-bi-300x176.png 300w, https:\/\/toancau.vn\/wp-content\/uploads\/2021\/08\/chong-set-cho-duong-truyen-thiet-bi-18x12.png 18w, https:\/\/toancau.vn\/wp-content\/uploads\/2021\/08\/chong-set-cho-duong-truyen-thiet-bi.png 677w\" sizes=\"(max-width: 472px) 100vw, 472px\" \/><\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">Communication devices are often at risk of damage due to induced pulses on the signal lines connecting these devices. The use of surge protection barriers installed at both ends of the line is a cost-effective method of reducing this risk. The highest risk is present on communication lines and signal lines in and out of the building. In these cases, surge arresters should be installed at the entry point to the building or at the top of the equipment. Building conductors longer than 30' or 50' should also be protected. Twisting and\/or wrapping the wire provides only a limited amount of protection, which should not be considered adequate protection for today's modern sensitive communication devices.<\/span><\/p>\n<h2><span id=\"Lam_sao_de_chon_thiet_bi_cho_mot_vi_tri_chi_dinh\"><span style=\"color: #000000;\"><strong><span style=\"font-size: medium;\">How to select the device for a specified location?<\/span><\/strong><\/span><\/span><\/h2>\n<p><span style=\"color: #000000;\"><strong><span style=\"font-size: medium;\">Five parameters must be considered to ensure surge arresters used in signal, data, or control circuits operate efficiently and do not adversely affect the operation of the circuit.<\/span><\/strong><\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">\u00a0\u00a0\u00a0 1. The surge arrester is designed to clamp the overvoltage surge down to a level that is safe for the device and does not affect the normal signal voltage. The clamping voltage of the surge arrester is selected in accordance with the maximum working voltage of the circuit.<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">\u00a0\u00a0\u00a0 2. The surge arrester must withstand the maximum signal current.<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">\u00a0\u00a0\u00a0 3. The bandwidth of the surge arrester must be enough for the system to operate smoothly without any signal degradation, that is, to ensure the loss of the surge arrester at the system's rated operating frequency. must not exceed certain limits. With most surge arresters, the maximum allowable frequency loss or baud rate data is usually specified.<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">\u00a0\u00a0\u00a0 4. Connection terminals, installation method, number of protection lines, and other physical characteristics must be evaluated.<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">\u00a0\u00a0\u00a0 5. The overvoltage protection level of the surge arrester must correspond to the installation location. For circuits inside the building, the minimum protection level is 0.25 KA. For circuits connected to the in\/out lines outside the building, the recommended protection level is 10\u201320 kA.<\/span><\/p>\n<p><span style=\"font-size: medium; color: #000000;\">Alternatively, a protocol or standard can define these five parameters. For example, CRITEC DEP-RS232\/9\/9 is designed to protect circuits that meet the V. 24 EIA-232 standard. Meanwhile, parameters 1-3 defined by the standard DEP-RS232\/9\/9 can be used in the RS-233 signaling protocol.<\/span><\/p>\n<div id=\"wrapper\">\n<div id=\"content\" style=\"text-align: right;\"><span style=\"color: #000000;\"><em>Ngu\u1ed3n: <a href=\"https:\/\/www.nvent.com\/en-us\/erico\" rel=\"nofollow noopener\" target=\"_blank\"><span style=\"text-decoration: underline;\"><span style=\"color: #0000ff; text-decoration: underline;\">www.erico.com<\/span><\/span><\/a><\/em><\/span><\/div>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ec3 \u0111\u1ea3m b\u1ea3o s\u1eed d\u1ee5ng chi ph\u00ed l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb\u00a0ch\u1ed1ng s\u00e9t lan truy\u1ec1n\u00a0cho \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u (cho vi\u1ec7c b\u1ea3o v\u1ec7 c\u00e1c m\u1ea1ch d\u1eef li\u1ec7u, t\u00edn hi\u1ec7u v\u00e0 \u0111i\u1ec1u khi\u1ec3n\u2026) m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3, c\u00f3 2 v\u1ea5n \u0111\u1ec1 ph\u1ea3i xem x\u00e9t: N\u1ed9i dung b&agrave;i vi\u1ebft1 Thi\u1ebft b\u1ecb ch\u1ed1ng s\u00e9t lan truy\u1ec1n n\u00ean \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t [&hellip;]<\/p>","protected":false},"author":3,"featured_media":2838,"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-1140","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\/1140","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=1140"}],"version-history":[{"count":2,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1140\/revisions"}],"predecessor-version":[{"id":8470,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/posts\/1140\/revisions\/8470"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media\/2838"}],"wp:attachment":[{"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/media?parent=1140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/categories?post=1140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/toancau.vn\/en\/wp-json\/wp\/v2\/tags?post=1140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}