{"id":14248,"date":"2026-03-22T14:47:00","date_gmt":"2026-03-22T06:47:00","guid":{"rendered":"https:\/\/www.tosunlux.eu\/?p=14248"},"modified":"2026-03-28T16:34:53","modified_gmt":"2026-03-28T08:34:53","slug":"3-pole-vs-4-pole-isolator-switch-when-how-to-use","status":"publish","type":"post","link":"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/","title":{"rendered":"3 Kutuplu ve 4 Kutuplu \u0130zolat\u00f6r Anahtarlar\u0131: Her Biri Ne Zaman ve Nas\u0131l Kullan\u0131l\u0131r?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 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\" >\u0130\u00e7indekiler<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"\u0130\u00e7indekiler Tablosunu A\u00e7\/Kapat\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Ge\u00e7i\u015f<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Understanding_the_Basics_What_Is_a_4-Pole_Isolator_Switch\" title=\"Temelleri Anlamak: 4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Nedir?\">Temelleri Anlamak: 4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Nedir?<\/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.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Comparing_3-Pole_and_4-Pole_Isolator_Switches\" title=\"3 Kutuplu ve 4 Kutuplu \u0130zolat\u00f6r Anahtarlar\u0131n\u0131n Kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131\">3 Kutuplu ve 4 Kutuplu \u0130zolat\u00f6r Anahtarlar\u0131n\u0131n Kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/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.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#How_to_Decide_Between_3-Pole_and_4-Pole_in_Real_Projects\" title=\"How to Decide Between 3-Pole and 4-Pole in Real Projects\">How to Decide Between 3-Pole and 4-Pole in Real Projects<\/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.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#When_to_Use_a_3-Pole_Isolator_Switch\" title=\"3 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?\">3 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?<\/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.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#When_to_Use_a_4-Pole_Isolator_Switch\" title=\"4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?\">4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Solar_PV_Systems\" title=\"G\u00fcne\u015f PV Sistemleri\">G\u00fcne\u015f PV Sistemleri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Generator_Systems\" title=\"Jenerat\u00f6r Sistemleri\">Jenerat\u00f6r Sistemleri<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Sensitive_Loads\" title=\"Sensitive Loads\">Sensitive Loads<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#TT_or_TN-C-S_Systems\" title=\"TT or TN-C-S Systems\">TT or TN-C-S Systems<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#4-Pole_Isolator_Switch_Wiring_Diagram_How_to_Connect\" title=\"4-Pole Isolator Switch Wiring Diagram: How to Connect\">4-Pole Isolator Switch Wiring Diagram: How to Connect<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Benefits_of_Using_a_4-Pole_Isolator_Switch\" title=\"4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Kullanman\u0131n Faydalar\u0131\">4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Kullanman\u0131n Faydalar\u0131<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Common_Mistakes_to_Avoid_When_Choosing_Isolators\" title=\"\u0130zolat\u00f6r Se\u00e7erken Ka\u00e7\u0131n\u0131lmas\u0131 Gereken Yayg\u0131n Hatalar\">\u0130zolat\u00f6r Se\u00e7erken Ka\u00e7\u0131n\u0131lmas\u0131 Gereken Yayg\u0131n Hatalar<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#FAQ\" title=\"SSS\">SSS<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#What_is_a_4-pole_isolator_switch\" title=\"4 kutuplu izolat\u00f6r anahtar\u0131 nedir?\">4 kutuplu izolat\u00f6r anahtar\u0131 nedir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#When_should_I_use_a_4-pole_isolator_switch\" title=\"4 kutuplu ay\u0131r\u0131c\u0131 \u015falteri ne zaman kullanmal\u0131y\u0131m?\">4 kutuplu ay\u0131r\u0131c\u0131 \u015falteri ne zaman kullanmal\u0131y\u0131m?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Is_a_3-pole_isolator_switch_enough_for_most_industrial_applications\" title=\"\u00c7o\u011fu end\u00fcstriyel uygulama i\u00e7in 3 kutuplu bir ay\u0131r\u0131c\u0131 anahtar yeterli midir?\">\u00c7o\u011fu end\u00fcstriyel uygulama i\u00e7in 3 kutuplu bir ay\u0131r\u0131c\u0131 anahtar yeterli midir?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#How_does_a_4-pole_isolator_improve_safety\" title=\"4 kutuplu izolat\u00f6r g\u00fcvenli\u011fi nas\u0131l art\u0131r\u0131r?\">4 kutuplu izolat\u00f6r g\u00fcvenli\u011fi nas\u0131l art\u0131r\u0131r?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Where_can_I_find_a_4-pole_isolator_switch_wiring_diagram\" title=\"4 kutuplu ay\u0131r\u0131c\u0131 \u015falter ba\u011flant\u0131 \u015femas\u0131n\u0131 nerede bulabilirim?\">4 kutuplu ay\u0131r\u0131c\u0131 \u015falter ba\u011flant\u0131 \u015femas\u0131n\u0131 nerede bulabilirim?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#What_is_the_difference_between_a_3-pole_and_a_4-pole_isolator_switch\" title=\"What is the difference between a 3-pole and a 4-pole isolator switch?\">What is the difference between a 3-pole and a 4-pole isolator switch?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Do_I_need_a_4-pole_isolator_for_solar_panels\" title=\"Do I need a 4-pole isolator for solar panels?\">Do I need a 4-pole isolator for solar panels?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Can_I_use_a_3-pole_isolator_switch_with_a_generator\" title=\"Can I use a 3-pole isolator switch with a generator?\">Can I use a 3-pole isolator switch with a generator?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#Conclusion\" title=\"\u00c7\u00f6z\u00fcm\">\u00c7\u00f6z\u00fcm<\/a><\/li><\/ul><\/nav><\/div>\n\n<p>In a three-phase system, the choice between a 3-pole and a 4-pole isolator switch depends on one key question: Does the neutral also need to be disconnected?<\/p>\n\n\n\n<p>A 3-pole isolator disconnects the three live conductors only. A 4-pole isolator disconnects the three phases plus the neutral, which is often preferred in generator connections, PV systems, TT earthing arrangements, and installations with sensitive electronic loads.<\/p>\n\n\n\n<p>This guide explains the practical difference when each option is used, what mistakes to avoid, and how to make a safer selection for industrial and commercial projects.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  \n  <title>Kahraman \u00dcr\u00fcn \u00d6zeti<\/title>\n  <style>\n    .hero-card {\n      display: flex;\n      flex-wrap: wrap;\n      align-items: center;\n      background: #f7f8fa;\n      border-radius: 16px;\n      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);\n      padding: 24px;\n      max-width: 900px;\n      margin: 40px auto;\n      font-family: Arial, sans-serif;\n      text-decoration: none;\n      color: inherit;\n font-family: 'Poppins';\n    }\n\n    .hero-image {\n      width: 220px;\n      height: auto;\n      border-radius: 12px;\n      object-fit: cover;\n      flex-shrink: 0;\n    }\n\n    .hero-content {\n      padding-left: 24px;\n      flex: 1;\n      min-width: 260px;\n    }\n\n    .hero-title {\n      font-size: 1.6rem;\n      font-weight: bold;\n      margin-bottom: 12px;\n      color: #222;\n      font-family: 'Poppins',\n    }\n\n    .hero-description {\n      font-size: 1rem;\n      color: #555;\n      margin-bottom: 18px;\n    }\n\n    .hero-link {\n      display: inline-block;\n      padding: 10px 20px;\n      background-color: #0066cc;\n      color: #fff;\n      text-decoration: none;\n      border-radius: 8px;\n      font-weight: bold;\n      transition: background 0.2s ease-in-out;\n    }\n\n    .hero-link:hover {\n      background-color: #004c99;\n    }\n\n    @media (max-width: 640px) {\n      .hero-card {\n        flex-direction: column;\n        text-align: center;\n      }\n\n      .hero-content {\n        padding-left: 0;\n        padding-top: 20px;\n      }\n\n      .hero-image {\n        width: 100%;\n        max-width: 280px;\n      }\n    }\n  <\/style>\n<\/head>\n<body>\n\n<a class=\"hero-card\" href=\"https:\/\/www.tosunlux.eu\/tr\/product\/\" target=\"_blank\">\n  <img decoding=\"async\" class=\"hero-image\" src=\"https:\/\/bunny-wp-pullzone-8eh7ulciaa.b-cdn.net\/wp-content\/uploads\/2024\/06\/DSC08160_%E5%89%AF%E6%9C%AC-1-1.webp\" alt=\"elektrik malzemeleri toptanc\u0131s\u0131\">\n  <div class=\"hero-content\">\n    <div class=\"hero-title\">Elektrik Malzemeleri Toptanc\u0131s\u0131<\/div>\n    <div class=\"hero-description\">G\u00fcvenilir bir elektrik malzemeleri toptanc\u0131s\u0131ndan tam bir elektrik \u00fcr\u00fcnleri yelpazesi ke\u015ffedin. TOSUNlux, k\u00fcresel pazarlar i\u00e7in devre kesiciler, kontakt\u00f6rler, anahtarlar ve daha fazlas\u0131n\u0131 sunar.<\/div>\n    <span class=\"hero-link\">\u00dcr\u00fcn\u00fc G\u00f6r\u00fcnt\u00fcle<\/span>\n  <\/div>\n<\/a>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Understanding_the_Basics_What_Is_a_4-Pole_Isolator_Switch\"><\/span><strong>Temelleri Anlamak: 4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Nedir?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"553\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image-1024x553.jpeg\" alt=\"3 Kutuplu ve 4 Kutuplu \u0130zolat\u00f6r Anahtarlar\u0131: Her Biri Ne Zaman ve Nas\u0131l Kullan\u0131l\u0131r?\" class=\"wp-image-14273\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image-1024x553.jpeg 1024w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image-300x162.jpeg 300w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image-768x415.jpeg 768w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image-18x10.jpeg 18w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/image.jpeg 1392w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>A four-pole (4P) isolator switch is an electrical disconnect device that isolates four conductors simultaneously\u2014usually three live wires (R, Y, B) and one neutral. This type of isolator is designed for systems where it\u2019s essential to disconnect the neutral along with the phases, such as in TN-C-S earthing systems or solar installations.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tam devre izolasyonu i\u00e7in n\u00f6tr ile birlikte \u00fc\u00e7 faz\u0131n tamam\u0131n\u0131 ay\u0131r\u0131r.<\/li>\n\n\n\n<li>Bak\u0131m s\u0131ras\u0131nda n\u00f6trden geri d\u00f6n\u00fc\u015f ak\u0131m\u0131n\u0131n ge\u00e7memesini sa\u011flayarak g\u00fcvenli\u011fi art\u0131r\u0131r.<\/li>\n\n\n\n<li>G\u00fcne\u015f enerjisi, jenerat\u00f6r ba\u011flant\u0131lar\u0131 veya dalgal\u0131 y\u00fcklerin oldu\u011fu sistemler gibi uygulamalar i\u00e7in olmazsa olmazd\u0131r.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Comparing_3-Pole_and_4-Pole_Isolator_Switches\"><\/span><strong>3 Kutuplu ve 4 Kutuplu \u0130zolat\u00f6r Anahtarlar\u0131n\u0131n Kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>\u00d6zellik<\/strong><\/td><td><strong>3 Kutuplu \u0130zolat\u00f6r Anahtar\u0131<\/strong><\/td><td><strong>4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131<\/strong><\/td><\/tr><tr><td>\u0130letken Say\u0131s\u0131<\/td><td>3 (Fazlar R, Y, B)<\/td><td>4 (Fazlar R, Y, B + N\u00f6tr)<\/td><\/tr><tr><td>N\u00f6tr \u0130zolasyon<\/td><td>Dahil De\u011fil<\/td><td>Dahil<\/td><\/tr><tr><td>Uygulama Kullan\u0131m\u0131<\/td><td>Standart 3 fazl\u0131 y\u00fckler<\/td><td>Kritik y\u00fckler, g\u00fcne\u015f ve jenerat\u00f6r sistemleri<\/td><\/tr><tr><td>G\u00fcvenlik Seviyesi<\/td><td>Orta<\/td><td>Y\u00fcksek (tamamen ba\u011flant\u0131 kesilmesi)<\/td><\/tr><tr><td>Uyumluluk Gereksinimi<\/td><td>Temel<\/td><td>Genellikle \u015febekeye ba\u011fl\u0131 uygulamalar i\u00e7in gereklidir<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" style=\"font-style:normal;font-weight:600\"><span class=\"ez-toc-section\" id=\"How_to_Decide_Between_3-Pole_and_4-Pole_in_Real_Projects\"><\/span>How to Decide Between 3-Pole and 4-Pole in Real Projects<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The selection is usually based on whether the neutral must remain connected or must be isolated together with the live conductors.<\/p>\n\n\n\n<p>Choose a 3-pole isolator when the load is a standard three-phase motor or machine and neutral isolation is not required by the system design. This is common in motor control panels, pumps, compressors, and general industrial loads.<\/p>\n\n\n\n<p>Choose a 4-pole isolator when the neutral must also be disconnected for safety, maintenance, or compliance reasons. This is more common in generator-backed systems, solar installations, TT earthing systems, and circuits serving sensitive electronic equipment.<\/p>\n\n\n\n<p>As a practical rule, if the application involves source switching, shared neutral concerns, or a requirement for full isolation during maintenance, a 4-pole isolator is usually the safer option.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_to_Use_a_3-Pole_Isolator_Switch\"><\/span><strong>3 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>3 kutuplu bir izolat\u00f6r anahtar\u0131, n\u00f6tr izolasyon gerektirmeyen standart \u00fc\u00e7 fazl\u0131 sistemler i\u00e7in idealdir. Genellikle \u015fu durumlarda kullan\u0131l\u0131r:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/how-to-select-3-phase-circuit-breaker-for-industrial-motor\/\">End\u00fcstriyel motorlar<\/a><\/li>\n\n\n\n<li>HVAC sistemleri<\/li>\n\n\n\n<li>Su pompalar\u0131<\/li>\n\n\n\n<li>Tak\u0131m tezgahlar\u0131<\/li>\n<\/ul>\n\n\n\n<p> As a standard AC isolator switch for three-phase loads, the 3-pole variant is cost-effective and widely available. These switches are sufficient when the neutral is grounded elsewhere or doesn\u2019t carry current under fault conditions.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><a href=\"https:\/\/www.tosunlux.eu\/tr\/products\/dc-isolating-switch-3\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img decoding=\"async\" width=\"255\" height=\"355\" src=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/1753166019295.png\" alt=\"PV Sisteminiz \u0130\u00e7in En \u0130yi DC \u0130zolasyon Anahtar\u0131n\u0131 Se\u00e7in\" class=\"wp-image-14186\" style=\"width:200px;height:auto\" srcset=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/1753166019295.png 255w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/1753166019295-215x300.png 215w, https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/1753166019295-9x12.png 9w\" sizes=\"(max-width: 255px) 100vw, 255px\" \/><\/a><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_to_Use_a_4-Pole_Isolator_Switch\"><\/span><strong>4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Ne Zaman Kullan\u0131lmal\u0131d\u0131r?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>N\u00f6tr ba\u011flant\u0131s\u0131n\u0131n kesilmesinin zorunlu oldu\u011fu durumlarda 4 kutuplu bir ay\u0131r\u0131c\u0131 anahtar kullan\u0131n. Bu \u015funlar\u0131 i\u00e7erir:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Solar_PV_Systems\"><\/span><strong>G\u00fcne\u015f PV Sistemleri<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Solar PV Systems: A reliable isolator switch for solar panel installations must isolate both DC and AC sides, including the neutral, for safe maintenance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Generator_Systems\"><\/span><strong>Jenerat\u00f6r Sistemleri<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>When switching between the grid <span style=\"box-sizing: border-box; margin: 0px; padding: 0px;\">Ve<a href=\"https:\/\/www.tosunlux.eu\/tr\/changeover-switch-supplier\/\" target=\"_blank\">\u00a0generator<\/a><\/span>, to prevent back-feed or a floating neutral.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Sensitive_Loads\"><\/span><strong>Sensitive Loads<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Veri merkezlerinde veya t\u0131bbi tesislerde n\u00f6tr dalgalanmalar\u0131 ekipmanlara zarar verebilir.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"TT_or_TN-C-S_Systems\"><\/span><strong>TT or TN-C-S Systems<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>N\u00f6tr dahil t\u00fcm iletkenlerin kesilmesinin uyum i\u00e7in gerekli oldu\u011fu durumlarda.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4-Pole_Isolator_Switch_Wiring_Diagram_How_to_Connect\"><\/span><strong>4-Pole Isolator Switch Wiring Diagram: How to Connect<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A 4-pole isolator switch <a href=\"https:\/\/www.tosunlux.eu\/tr\/dc-isolating-switch\/\">wiring diagram<\/a> typically includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u00dc\u00e7 fazl\u0131 giri\u015fler (R, Y, B)<\/strong><\/li>\n\n\n\n<li><strong>N\u00f6tr giri\u015f (N)<\/strong><\/li>\n\n\n\n<li><strong>\u00c7\u0131k\u0131\u015f y\u00fck terminalleri (hat i\u00e7i ba\u011fl\u0131)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Her kutup bir iletkene kar\u015f\u0131l\u0131k gelir ve t\u00fcm kutuplar birlikte \u00e7al\u0131\u015fmak \u00fczere mekanik olarak birbirine ba\u011fl\u0131d\u0131r. Anahtar kapat\u0131ld\u0131\u011f\u0131nda, d\u00f6rt hat da fiziksel olarak ayr\u0131l\u0131r ve canl\u0131 temas riskleri ortadan kalkar. Kablolama yaparken daima kurulum k\u0131lavuzuna ve yerel y\u00f6netmeliklere bak\u0131n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Benefits_of_Using_a_4-Pole_Isolator_Switch\"><\/span><strong>4 Kutuplu \u0130zolat\u00f6r Anahtar\u0131 Kullanman\u0131n Faydalar\u0131<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Switching to a four-pole isolator provides benefits beyond just compliance:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Geli\u015fmi\u015f G\u00fcvenlik:<\/strong> N\u00f6tr \u00fczerinden art\u0131k veya ka\u00e7ak ak\u0131m\u0131n ge\u00e7mesini \u00f6nler.<\/li>\n\n\n\n<li><strong>Geli\u015fmi\u015f Koruma:<\/strong> N\u00f6tr ar\u0131zalar\u0131, ba\u011flant\u0131s\u0131 kesilmedi\u011fi takdirde ciddi ekipman hasar\u0131na yol a\u00e7abilir.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.tosunlux.eu\/tr\/residual-current-circuit-breaker\/\">Sistem Uyumlulu\u011fu<\/a>:<\/strong> Tam ba\u011flant\u0131 kesmenin gerekli oldu\u011fu TN-CS ve TT topraklama sistemleriyle iyi \u00e7al\u0131\u015f\u0131r.<\/li>\n\n\n\n<li><strong>\u00c7ok y\u00f6nl\u00fcl\u00fck:<\/strong> Yedek jenerat\u00f6rler, g\u00fcne\u015f enerjisi dahil olmak \u00fczere \u00e7e\u015fitli uygulamalar i\u00e7in uygundur <a href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/the-comprehensive-guide-to-electrical-car-charge\/\" target=\"_blank\" rel=\"noreferrer noopener\">EV \u015farj\u0131<\/a> \u0130stasyonlar ve daha fazlas\u0131.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Common_Mistakes_to_Avoid_When_Choosing_Isolators\"><\/span><strong>\u0130zolat\u00f6r Se\u00e7erken Ka\u00e7\u0131n\u0131lmas\u0131 Gereken Yayg\u0131n Hatalar<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The most common isolator selection mistake is focusing only on the current rating while ignoring the neutral and the actual switching scenario.<\/p>\n\n\n\n<p>Another mistake is using a 3-pole isolator in applications where full neutral isolation is expected, such as generator supply switching or certain PV and TT system layouts. This can leave part of the circuit still referenced and create maintenance risk.<\/p>\n\n\n\n<p>Buyers should also verify voltage class, utilization category, enclosure requirement, and installation environment. Outdoor or rooftop installations may require different protection levels from indoor panel applications.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tarafs\u0131z\u0131 G\u00f6z Ard\u0131 Etmek:<\/strong> Payla\u015f\u0131ml\u0131 n\u00f6trl\u00fc sistemlerde sadece 3 kutuplu izolat\u00f6r kullan\u0131lmas\u0131 devreyi k\u0131smen enerjili b\u0131rakabilir.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/understanding-the-different-types-of-mccb\/\">Incorrect Rating<\/a>:<\/strong> \u0130zolat\u00f6r anahtar\u0131n\u0131n ak\u0131m ve voltaj de\u011ferinin uygulaman\u0131zla uyumlu oldu\u011fundan her zaman emin olun.<\/li>\n\n\n\n<li><strong>Kalitesizlik:<\/strong> Sertifikas\u0131z anahtarlardan ka\u00e7\u0131n\u0131n. Uygun sertifikaya sahip olmayan bir anahtar elektrik ar\u0131zas\u0131 veya yang\u0131n riski ta\u015f\u0131r.<\/li>\n<\/ul>\n\n\n\n<p><strong>TOSUNlux Do\u011fru Se\u00e7imi Yapman\u0131za Nas\u0131l Yard\u0131mc\u0131 Olur?<\/strong><\/p>\n\n\n\n<p>TOSUNlux ile \u00c7\u00f6z\u00fcm\u00fcn\u00fcz\u00fc Bulun. Projeniz ister sa\u011flam bir 3 kutuplu izolat\u00f6r anahtar\u0131, ister 4 kutuplu bir izolat\u00f6r anahtar\u0131n\u0131n geli\u015fmi\u015f g\u00fcvenli\u011fini gerektirsin, TOSUNlux tamamen sertifikal\u0131 ve y\u00fcksek performansl\u0131 bir \u00e7\u00f6z\u00fcm sunar. 30 y\u0131l\u0131 a\u015fk\u0131n k\u00fcresel uzmanl\u0131\u011f\u0131yla TOSUNlux, a\u015fa\u011f\u0131dakiler i\u00e7in g\u00fcvenilir izolat\u00f6r anahtarlar\u0131 sa\u011flar:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>G\u00fc\u00e7 <a href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/what-is-a-distribution-board-and-how-does-it-work\/\" target=\"_blank\" rel=\"noreferrer noopener\">da\u011f\u0131t\u0131m panolar\u0131<\/a><\/li>\n\n\n\n<li>G\u00fcne\u015f PV sistemleri<\/li>\n\n\n\n<li>End\u00fcstriyel otomasyon<\/li>\n\n\n\n<li>Tar\u0131msal uygulamalar<\/li>\n<\/ul>\n\n\n\n<p>\u0130zolat\u00f6r anahtarlar\u0131 hakk\u0131nda daha fazla bilgi edinmek i\u00e7in buraya t\u0131klay\u0131n:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.tosunlux.eu\/tr\/products\/dc-isolating-switch-3\/\" target=\"_blank\" rel=\"noreferrer noopener\">DC \u0130zolasyon Anahtar\u0131 \u00dcr\u00fcn Sayfas\u0131<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.tosunlux.eu\/tr\/category\/isolation-switch\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u0130zolasyon Anahtar\u0131 Kategorisi<\/a><\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-buttons is-content-justification-center is-layout-flex wp-container-core-buttons-is-layout-16018d1d wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-25\"><a class=\"wp-block-button__link has-white-color has-text-color has-background has-link-color wp-element-button\" href=\"https:\/\/www.tosunlux.eu\/tr\/contact\/\" style=\"border-radius:50px;background-color:#00b1cd\" target=\"_blank\" rel=\"noreferrer noopener\">Teklif Al\u0131n<\/a><\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span><strong>SSS<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_a_4-pole_isolator_switch\"><\/span><strong>4 kutuplu izolat\u00f6r anahtar\u0131 nedir?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A 4-pole isolator is an electrical switch that disconnects three-phase lines and the neutral wire simultaneously for complete isolation and safety.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"When_should_I_use_a_4-pole_isolator_switch\"><\/span><strong>4 kutuplu ay\u0131r\u0131c\u0131 \u015falteri ne zaman kullanmal\u0131y\u0131m?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Jenerat\u00f6r sistemleri, g\u00fcne\u015f PV kurulumlar\u0131 veya hassas ekipman devreleri gibi n\u00f6tr ba\u011flant\u0131s\u0131n\u0131n kesilmesi gerekti\u011finde kullan\u0131l\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Is_a_3-pole_isolator_switch_enough_for_most_industrial_applications\"><\/span><strong>\u00c7o\u011fu end\u00fcstriyel uygulama i\u00e7in 3 kutuplu bir ay\u0131r\u0131c\u0131 anahtar yeterli midir?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes, if neutral isolation is not critical, a 3-pole isolator switch is commonly used in motors and HVAC systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_does_a_4-pole_isolator_improve_safety\"><\/span><strong>4 kutuplu izolat\u00f6r g\u00fcvenli\u011fi nas\u0131l art\u0131r\u0131r?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>N\u00f6tr ba\u011flant\u0131s\u0131n\u0131 keserek beklenmedik ak\u0131m d\u00f6ng\u00fclerinin olu\u015fmas\u0131n\u0131 \u00f6nler, elektrik \u00e7arpmas\u0131 riskini ve ekipman ar\u0131zas\u0131n\u0131 azalt\u0131r.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Where_can_I_find_a_4-pole_isolator_switch_wiring_diagram\"><\/span><strong>4 kutuplu ay\u0131r\u0131c\u0131 \u015falter ba\u011flant\u0131 \u015femas\u0131n\u0131 nerede bulabilirim?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u00c7o\u011fu \u00fcretici, \u00fcr\u00fcn k\u0131lavuzuyla birlikte sunar. Ayr\u0131ca sekt\u00f6r forumlar\u0131nda veya TOSUNlux kaynaklar\u0131nda \u00f6rnek tasar\u0131mlara g\u00f6z atabilirsiniz.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_a_3-pole_and_a_4-pole_isolator_switch\"><\/span><strong>What is the difference between a 3-pole and a 4-pole isolator switch?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A 3-pole isolator disconnects only the three-phase conductors (R, Y, B), while a 4-pole isolator also disconnects the neutral wire, providing complete circuit isolation. The 4-pole version is required in solar PV systems, generator setups, and TN-C-S earthing systems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_I_need_a_4-pole_isolator_for_solar_panels\"><\/span><strong>Do I need a 4-pole isolator for solar panels?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Yes, for grid-tied solar PV installations, a 4-pole isolator switch is typically required to disconnect both the phase and neutral conductors during maintenance, ensuring full isolation from the grid.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Can_I_use_a_3-pole_isolator_switch_with_a_generator\"><\/span><strong>Can I use a 3-pole isolator switch with a generator?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A 3-pole isolator can be used with a generator if the neutral is solidly grounded.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>\u00c7\u00f6z\u00fcm<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Choosing the right isolator switch isn\u2019t just about compliance \u2014 it\u2019s about ensuring the safety and reliability of your entire electrical system. A 3-pole isolator switch serves well for basic three-phase applications, but a 4-pole isolator takes safety to the next level, making it ideal for critical or outdoor applications.<\/p>\n\n\n\n<p>Hat\u0131rlamak, <a href=\"https:\/\/www.tosunlux.eu\/tr\" target=\"_blank\" rel=\"noreferrer noopener\">TOSUNlux <\/a>D\u00fcnya \u00e7ap\u0131ndaki ihtiya\u00e7lar\u0131n\u0131z\u0131 kar\u015f\u0131lamaya haz\u0131r. \u0130ster end\u00fcstriyel makinelerde ister d\u0131\u015f mekan kurulumlar\u0131nda \u00e7al\u0131\u015f\u0131yor olun, sistemlerinizi g\u00fcvende tutan sertifikal\u0131 \u00e7\u00f6z\u00fcmler bulun.<\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>In a three-phase system, the choice between a 3-pole and a 4-pole isolator switch depends on one key question: Does the neutral also need to be disconnected? A 3-pole isolator disconnects the three live conductors only. A 4-pole isolator disconnects the three phases plus the neutral, which is often preferred in generator connections, PV systems, TT earthing arrangements, and installations with sensitive electronic loads. This guide explains the practical difference when each option is used, what mistakes to avoid, and how to make a safer selection for industrial and commercial projects. Hero Product Highlight Electrical Supply Wholesaler Discover a full range of electrical products from a trusted electrical supply wholesaler. TOSUNlux offers circuit breakers, contactors, switches, and more for global markets. View Product Understanding the Basics: What Is a 4-Pole Isolator Switch? A four-pole (4P) isolator switch is an electrical disconnect device that isolates four conductors simultaneously\u2014usually three live wires (R, Y, B) and one neutral. This type of isolator is designed for systems where it\u2019s essential to disconnect the neutral along with the phases, such as in TN-C-S earthing systems or solar installations. Comparing 3-Pole and 4-Pole Isolator Switches Feature 3-Pole Isolator Switch 4-Pole Isolator Switch Number of Conductors 3 (Phases R, Y, B) 4 (Phases R, Y, B + Neutral) Neutral Isolation Not Included Included Application Use Standard 3-phase loads Critical loads, solar, and generator systems Safety Level Medium High (complete disconnection) Compliance Requirement Basic Often required for grid-tied applications How to Decide Between 3-Pole and 4-Pole in Real Projects The selection is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14271,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-14248","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>3-Pole vs 4-Pole Isolator Switch: Differences,Wiring &amp; When to Use<\/title>\n<meta name=\"description\" content=\"What&#039;s the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"3-Pole vs 4-Pole Isolator Switch: Differences,Wiring &amp; When to Use\" \/>\n<meta property=\"og:description\" content=\"What&#039;s the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/\" \/>\n<meta property=\"og:site_name\" content=\"TOSUNlux Official Site - Electrical Circuit Breaker Manufacturer in China\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/TOSUNelectric\/\" \/>\n<meta property=\"article:published_time\" content=\"2026-03-22T06:47:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-28T08:34:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1392\" \/>\n\t<meta property=\"og:image:height\" content=\"752\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Yazan:\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tahmini okuma s\u00fcresi\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 dakika\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#\\\/schema\\\/person\\\/a775a92fd66d941e4cbb706a83cd3173\"},\"headline\":\"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each\",\"datePublished\":\"2026-03-22T06:47:00+00:00\",\"dateModified\":\"2026-03-28T08:34:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/\"},\"wordCount\":1279,\"publisher\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"tr\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/\",\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/\",\"name\":\"3-Pole vs 4-Pole Isolator Switch: Differences,Wiring & When to Use\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp\",\"datePublished\":\"2026-03-22T06:47:00+00:00\",\"dateModified\":\"2026-03-28T08:34:53+00:00\",\"description\":\"What's the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#breadcrumb\"},\"inLanguage\":\"tr\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp\",\"contentUrl\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2025\\\/07\\\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp\",\"width\":1392,\"height\":752,\"caption\":\"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/blog\\\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#website\",\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/\",\"name\":\"TOSUNlux Official Site - Electrical Circuit Breaker Manufacturer in China\",\"description\":\"Power Distribution System Supplier\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#organization\"},\"alternateName\":\"TOSUNlux\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"tr\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#organization\",\"name\":\"TOSUNlux\",\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/LOGOSYSM.71762f1.png\",\"contentUrl\":\"https:\\\/\\\/www.tosunlux.eu\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/LOGOSYSM.71762f1.png\",\"width\":153,\"height\":55,\"caption\":\"TOSUNlux\"},\"image\":{\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/TOSUNelectric\\\/\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/wenzhou-tosun-electric-co.-ltd\\\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.tosunlux.eu\\\/ru\\\/#\\\/schema\\\/person\\\/a775a92fd66d941e4cbb706a83cd3173\",\"name\":\"admin\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"tr\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g\",\"caption\":\"admin\"},\"sameAs\":[\"https:\\\/\\\/www.tosunlux.eu\"],\"url\":\"https:\\\/\\\/www.tosunlux.eu\\\/tr\\\/blog\\\/author\\\/admin\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"3-Pole vs 4-Pole Isolator Switch: Differences,Wiring & When to Use","description":"What's the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/","og_locale":"tr_TR","og_type":"article","og_title":"3-Pole vs 4-Pole Isolator Switch: Differences,Wiring & When to Use","og_description":"What's the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.","og_url":"https:\/\/www.tosunlux.eu\/tr\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/","og_site_name":"TOSUNlux Official Site - Electrical Circuit Breaker Manufacturer in China","article_publisher":"https:\/\/www.facebook.com\/TOSUNelectric\/","article_published_time":"2026-03-22T06:47:00+00:00","article_modified_time":"2026-03-28T08:34:53+00:00","og_image":[{"width":1392,"height":752,"url":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp","type":"image\/webp"}],"author":"admin","twitter_card":"summary_large_image","twitter_misc":{"Yazan:":"admin","Tahmini okuma s\u00fcresi":"6 dakika"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#article","isPartOf":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/"},"author":{"name":"admin","@id":"https:\/\/www.tosunlux.eu\/ru\/#\/schema\/person\/a775a92fd66d941e4cbb706a83cd3173"},"headline":"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each","datePublished":"2026-03-22T06:47:00+00:00","dateModified":"2026-03-28T08:34:53+00:00","mainEntityOfPage":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/"},"wordCount":1279,"publisher":{"@id":"https:\/\/www.tosunlux.eu\/ru\/#organization"},"image":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#primaryimage"},"thumbnailUrl":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp","articleSection":["Blog"],"inLanguage":"tr"},{"@type":"WebPage","@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/","url":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/","name":"3-Pole vs 4-Pole Isolator Switch: Differences,Wiring & When to Use","isPartOf":{"@id":"https:\/\/www.tosunlux.eu\/ru\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#primaryimage"},"image":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#primaryimage"},"thumbnailUrl":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp","datePublished":"2026-03-22T06:47:00+00:00","dateModified":"2026-03-28T08:34:53+00:00","description":"What's the difference between 3-pole and 4-pole isolator switches? Learn when each is required, the basics of wiring diagrams, and how to choose the right one for solar generators and industrial systems.","breadcrumb":{"@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#breadcrumb"},"inLanguage":"tr","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/"]}]},{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#primaryimage","url":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp","contentUrl":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2025\/07\/b8bbb7d7-5abc-44d2-9136-a48f05c3ea25.webp","width":1392,"height":752,"caption":"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each"},{"@type":"BreadcrumbList","@id":"https:\/\/www.tosunlux.eu\/blog\/3-pole-vs-4-pole-isolator-switch-when-how-to-use\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.tosunlux.eu\/ru\/"},{"@type":"ListItem","position":2,"name":"3-Pole vs. 4-Pole Isolator Switches: When and How to Use Each"}]},{"@type":"WebSite","@id":"https:\/\/www.tosunlux.eu\/ru\/#website","url":"https:\/\/www.tosunlux.eu\/ru\/","name":"TOSUNlux Resmi Sitesi - \u00c7in&#039;de Elektrik Sigortas\u0131 \u00dcreticisi","description":"G\u00fc\u00e7 Da\u011f\u0131t\u0131m Sistemi Tedarik\u00e7isi","publisher":{"@id":"https:\/\/www.tosunlux.eu\/ru\/#organization"},"alternateName":"TOSUNlux","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.tosunlux.eu\/ru\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"tr"},{"@type":"Organization","@id":"https:\/\/www.tosunlux.eu\/ru\/#organization","name":"TOSUNlux","url":"https:\/\/www.tosunlux.eu\/ru\/","logo":{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/www.tosunlux.eu\/ru\/#\/schema\/logo\/image\/","url":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/01\/LOGOSYSM.71762f1.png","contentUrl":"https:\/\/www.tosunlux.eu\/wp-content\/uploads\/2022\/01\/LOGOSYSM.71762f1.png","width":153,"height":55,"caption":"TOSUNlux"},"image":{"@id":"https:\/\/www.tosunlux.eu\/ru\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/TOSUNelectric\/","https:\/\/www.linkedin.com\/company\/wenzhou-tosun-electric-co.-ltd\/"]},{"@type":"Person","@id":"https:\/\/www.tosunlux.eu\/ru\/#\/schema\/person\/a775a92fd66d941e4cbb706a83cd3173","name":"y\u00f6netici","image":{"@type":"ImageObject","inLanguage":"tr","@id":"https:\/\/secure.gravatar.com\/avatar\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/75eeae9adbd42fdf679c24104222466e12c5914b74822c713229c94e98ed4d2f?s=96&d=mm&r=g","caption":"admin"},"sameAs":["https:\/\/www.tosunlux.eu"],"url":"https:\/\/www.tosunlux.eu\/tr\/blog\/author\/admin\/"}]}},"_links":{"self":[{"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/posts\/14248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/comments?post=14248"}],"version-history":[{"count":9,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/posts\/14248\/revisions"}],"predecessor-version":[{"id":15846,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/posts\/14248\/revisions\/15846"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/media\/14271"}],"wp:attachment":[{"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/media?parent=14248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/categories?post=14248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tosunlux.eu\/tr\/wp-json\/wp\/v2\/tags?post=14248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}