{"id":11057,"date":"2023-12-12T13:28:17","date_gmt":"2023-12-12T12:28:17","guid":{"rendered":"https:\/\/cubeconcepts.de\/?p=11057"},"modified":"2025-05-14T17:02:33","modified_gmt":"2025-05-14T15:02:33","slug":"disconnector-for-pv-systems","status":"publish","type":"post","link":"https:\/\/cubeconcepts.de\/en\/trennschalter-bei-pv-anlagen\/","title":{"rendered":"Disconnectors for PV systems"},"content":{"rendered":"<p>Basically there are <strong>Different types of disconnectors for PV systems<\/strong>. Your commitment since 2006 <strong>prescribed by law<\/strong> and they are next to the <a href=\"https:\/\/cubeconcepts.de\/en\/overvoltage-protection-for-pv-systems\/\">Overvoltage protection<\/a> an important component of a safe PV system. Disconnectors are used in PV systems to interrupt or close the circuit. They are used to disconnect the connection between the PV system and the internal and external power grid to ensure the safety of installers and maintenance technicians. Disconnectors make it possible to control the flow of electricity in the system and switch it off safely if necessary.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How disconnectors ensure safety in PV systems<\/h2>\n\n\n\n<p>Disconnectors are used to interrupt the circuit in PV systems. This is particularly important during <strong>Installation, <a href=\"https:\/\/cubeconcepts.de\/en\/maintenance-of-pv-systems-maximizing-performance-and-durability\/\">Maintenance<\/a> or repair<\/strong> of the system, as the individual <a href=\"https:\/\/cubeconcepts.de\/en\/efficiency-of-solar-cells\/\">Solar modules<\/a> always carry electricity as soon as daylight falls on them. By interrupting the flow of electricity, installers and technicians can work safely on the system, <strong>without danger<\/strong> of an electric shock. In addition, disconnectors also enable the system to be switched off quickly in the event of an emergency or fault.<\/p>\n\n\n\n<p>Disconnectors are also designed to provide a high level of electrical insulation. This means that they <strong>Safely interrupt the current flow<\/strong> without arcing or sparking. This minimizes the risk of fire or damage to the system. The use of disconnectors in PV systems is therefore essential to ensure the safety of the system.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Types of disconnectors used in PV systems<\/h2>\n\n\n\n<p>On the DC side of a PV system <strong>Disconnector at module level<\/strong> can be used. These load-break switches are installed externally near the module, regulate low to medium voltages and can disconnect individual modules or up to six modules from the line. So-called circuit-breakers can disconnect higher voltages. They are also installed on the outside and <strong>String level<\/strong> used. They are thus able to separate up to 20 solar modules from the system. Finally, they also serve <strong>the <a href=\"https:\/\/cubeconcepts.de\/en\/the-dimensioning-factor-for-inverters\/\">Inverter<\/a> as disconnector<\/strong> on the DC side and the so-called fireman's switch, which can disconnect the direct current from the rest of the system as a safety component.<\/p>\n\n\n\n<p>In general, the following applies <strong>No live DC cables <\/strong>into a<strong> lead closed building<\/strong>. If the inverters are installed inside the building, a <strong>Activation at string level <\/strong>indispensable. This requires the <strong>Installation of a fire department disconnector<\/strong> on the roof to de-energize the DC cables in the event of a fire. If the <strong>Inverter <\/strong>on the other hand <strong>on the roof or facade <\/strong>are installed, there is no need for disconnection at string or even module level. In this case, the live DC cables do not run through the interior of the building and, in the event of a fire, it is sufficient for the fire department to simply disconnect the building, as the inverters then switch off automatically and are de-energized after around five minutes due to the installed capacitors. The design of the strings and the <a href=\"https:\/\/cubeconcepts.de\/en\/wiring-of-pv-modules\/\">Wiring of PV modules<\/a> therefore also depends on the position of the inverters or rotary straighteners. <\/p>\n\n\n\n<p>Additional disconnectors are also usually installed downstream of the inverters. These <strong>AC load-break switch<\/strong> or safety disconnectors in rooftop PV systems are usually located inside the commercial or industrial buildings in front of the control cabinets in which the entire PV system is installed. <strong>additionally by RCD<\/strong> is secured.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Factors to consider when making a selection<\/h2>\n\n\n\n<p>There are various factors to consider when selecting disconnectors for PV systems. The most important ones include <strong><a href=\"https:\/\/cubeconcepts.de\/en\/rated-power-and-watt-peak-for-solar-modules\/\">Rated voltage and rated current<\/a> of the system<\/strong>. It is important to choose disconnectors that are suitable for the specific voltage and current of the PV system. A disconnector that is not designed for the correct voltage or current can lead to <strong>Malfunctions<\/strong> or even to <strong>Damage to the system<\/strong> lead.<\/p>\n\n\n\n<p>Another important factor when selecting disconnectors is the <strong>Protection class<\/strong>. PV systems are exposed to various environmental conditions, such as moisture or dust. It is therefore important to choose disconnectors with an appropriate degree of protection to ensure that they function reliably under the given conditions, as each individual plug connection basically represents a greater risk than a fixed cable.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Installation and maintenance of disconnectors for PV systems<\/h2>\n\n\n\n<p>The proper installation and maintenance of disconnectors is crucial for the <strong>Safety and efficiency<\/strong> of PV systems and is also used by the <a href=\"https:\/\/cubeconcepts.de\/en\/insurance-compliant-pv-systems\/\">Insurances<\/a> prescribed. During installation, the disconnectors must be installed in accordance with the applicable regulations and standards to ensure that they function properly. It is also important to test the disconnectors regularly. <strong>to maintain and check<\/strong>. After all <strong>Cables, connectors <\/strong>and the<strong> Electrical system of the PV modules<\/strong> They are exposed to the weather and are therefore subject to wear and tear, ageing, wind movements or animal browsing. <strong>Fire risk<\/strong>. An effective <strong>Fire protection system<\/strong> detects incipient fires at an early stage, the isolating switches specifically isolate these areas from the rest of the system, thus preventing consequential damage or operational failures.<\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/cubeconcepts.de\/en\/category\/photovoltaics-topics\/\">Back to the PV topics<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\t\t<div data-elementor-type=\"section\" data-elementor-id=\"15300\" class=\"elementor elementor-15300\" data-elementor-post-type=\"elementor_library\">\n\t\t\t<div class=\"elementor-element elementor-element-7720627 e-flex e-con-boxed e-con e-parent\" data-id=\"7720627\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-e2d7cf1 e-con-full e-flex e-con e-child\" data-id=\"e2d7cf1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-7f42313 e-con-full e-flex e-con e-child\" data-id=\"7f42313\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-42660e6 elementor-widget elementor-widget-heading\" data-id=\"42660e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Energy Newsletter<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b495a97 elementor-widget elementor-widget-spacer\" data-id=\"b495a97\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-916e623 elementor-widget elementor-widget-text-editor\" data-id=\"916e623\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Always stay up-to-date!<\/p><p><strong>Your advantages:<\/strong><\/p><p>\u2713 Latest news on renewable energies<\/p><p>\u2713 Updates on energy law &amp; subsidies<\/p><p>\u2713 Expert knowledge on PV and sustainability topics<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a28f7a5 elementor-widget elementor-widget-spacer\" data-id=\"a28f7a5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-397a653 elementor-widget elementor-widget-button\" data-id=\"397a653\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjE1MDQ0IiwidG9nZ2xlIjpmYWxzZX0%3D\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Register now<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0648968 e-con-full e-flex e-con e-child\" data-id=\"0648968\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e4654f0 elementor-widget elementor-widget-image\" data-id=\"e4654f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2024\/06\/Newsletter-Mockup-1024x768.png\" class=\"attachment-large size-large wp-image-15431\" alt=\"\" srcset=\"https:\/\/cubeconcepts.de\/wp-content\/uploads\/2024\/06\/Newsletter-Mockup-1024x768.png 1024w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2024\/06\/Newsletter-Mockup-300x225.png 300w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2024\/06\/Newsletter-Mockup-768x576.png 768w, https:\/\/cubeconcepts.de\/wp-content\/uploads\/2024\/06\/Newsletter-Mockup.png 1500w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Grunds\u00e4tzlich gibt es verschiedene Arten von Trennschalter bei PV-Anlagen. Ihr Einsatz ist seit 2006 gesetzlich vorgeschrieben und sie sind neben dem \u00dcberspannungsschutz ein wichtiger Bestandteil eines sicheren PV-Systems. Trennschalter werden in PV-Anlagen eingesetzt, um den Stromkreis zu unterbrechen oder zu schlie\u00dfen. Sie dienen dazu, die Verbindung zwischen der PV-Anlage und dem internen und externen Stromnetz [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":11058,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[50,25],"tags":[],"class_list":["post-11057","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-photovoltaik-themen-in-deutschland-wissenswertes-fuer-energieprojekte","category-photovoltaik-themen"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Trennschalter bei PV-Anlagen | CUBE CONCEPTS<\/title>\n<meta name=\"description\" content=\"Alle verschiedenen Trennschalter bei PV-Anlagen sorgen daf\u00fcr, dass die Solarmodule sicher vom Gesamtsystem getrennt werden k\u00f6nnen.\" \/>\n<meta name=\"robots\" content=\"index, follow, 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