{"id":7448,"date":"2026-01-29T15:26:49","date_gmt":"2026-01-29T14:26:49","guid":{"rendered":"https:\/\/q3-energie.de\/ac-connection-box-technical-aspects\/"},"modified":"2026-07-22T18:17:56","modified_gmt":"2026-07-22T16:17:56","slug":"ac-connection-box-technical-aspects","status":"publish","type":"page","link":"https:\/\/q3-energie.de\/en\/technic\/ac-connection-box-technical-aspects\/","title":{"rendered":"AC Connection Box (Technical Aspects)"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull\" style=\"min-height:603px;aspect-ratio:unset;\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"700\" class=\"wp-block-cover__image-background wp-image-2028 size-full\" alt=\"Wand Hintergrund\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund-300x109.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund-1024x373.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund-768x280.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Wand_Hintergrund-1536x560.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-60 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-columns alignfull are-vertically-aligned-center is-layout-flex wp-container-core-columns-is-layout-5b0bc1de wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50);flex-basis:65%\">\n<h1 class=\"wp-block-heading has-text-align-left has-nv-text-dark-bg-color has-text-color has-large-font-size\"><strong>AC Connection Box for PV Systems<\/strong><br><strong>Technology, Design and Standards-Compliant Engineering<\/strong><\/h1>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-text-align-left has-nv-text-dark-bg-color has-text-color wp-block-paragraph\" style=\"font-size:18px\"><strong>AC connection boxes ensure the safe feed-in, distribution and protection of AC circuits in photovoltaic systems \u2013 from the inverter to the grid connection point.<\/strong><\/p>\n\n\n\n<div style=\"height:9px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons has-custom-font-size has-x-large-font-size is-horizontal is-layout-flex wp-block-buttons-is-layout-flex\" style=\"padding-top:0;padding-bottom:0\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-primary animated fadeInLeft\"><a class=\"wp-block-button__link has-border-color has-nv-site-bg-border-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"#aufbau\" style=\"border-width:2px;border-top-left-radius:4px;border-top-right-radius:4px;border-bottom-left-radius:4px;border-bottom-right-radius:4px;padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--20)\">Design of an AC Connection Box \u2192<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-secondary animated fadeInLeft delay-100ms\"><a class=\"wp-block-button__link has-border-color has-nv-site-bg-border-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"#netz\" style=\"border-width:2px;border-top-left-radius:4px;border-top-right-radius:4px;border-bottom-left-radius:4px;border-bottom-right-radius:4px;padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--20)\">Grid Configurations and Protection Concepts \u2192<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-secondary animated fadeInLeft delay-200ms\"><a class=\"wp-block-button__link has-border-color has-nv-site-bg-border-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"#norm\" style=\"border-width:2px;border-top-left-radius:4px;border-top-right-radius:4px;border-bottom-left-radius:4px;border-bottom-right-radius:4px;padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--20)\">Standards and Regulatory Requirements \u2192<\/a><\/div>\n\n\n\n<div class=\"wp-block-button has-custom-width wp-block-button__width-50 is-style-primary animated fadeInLeft delay-500ms\"><a class=\"wp-block-button__link has-border-color has-nv-site-bg-border-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"#l\u00f6sung\" style=\"border-width:2px;border-top-left-radius:4px;border-top-right-radius:4px;border-bottom-left-radius:4px;border-bottom-right-radius:4px;padding-top:var(--wp--preset--spacing--30);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--30);padding-left:var(--wp--preset--spacing--20)\">Standard or Project-Specific? \u2192<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px.webp\" alt=\"250 A AC-Anschlussbox (WR - Netz\u00fcbergabe). 1 WR-Eingang. Standard TN-C, Option TN-S zur WR-Strecke. Beschichtung: C4 (Au\u00dfenbereich). WR-Sammelschienenklemmen: WR-Klemme 95\u2013120 mm\u00b2 \u2013 Bedarf: 5 St\u00fcck. Netz\u00fcbergabe-Sammelschienenklemmen: Netz\u00fcbergabe-Klemme 95\u2013120 mm\u00b2 \u2013 Bedarf: 5 St\u00fcck. \u00dcberspannungsschutz T1+T2: TN\u2013S - 3+1 (L\u2013N + N\u2013PE). Fernmeldungen: SPD-Ausfall, NH-OFF (potenzialfrei). Kabeleinf\u00fchrungen WR: \u2022 WR M75 (\u00d8 42\u201355 mm) \u00d7 1 Kabeleinf\u00fchrung Netz\u00fcbergabe: \u2022 Netz\u00fcbergabe M75 (\u00d8 42\u201355 mm) \u00d7 1 M20 Membran f\u00fcr Signale\/Service.\" class=\"wp-image-2030\" style=\"width:400px\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px.webp 800w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-768x768.webp 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-rank-math-toc-block q3-toc has-neve-link-color-color has-text-color has-link-color wp-elements-21087163a171bfb9a29b0ee92de499a8\" id=\"rank-math-toc\"><h2>On this page<\/h2><nav><ul><li class=\"\"><a href=\"#was-ist-eine-ac-anschlussbox\">What Is an AC Connection Box?<\/a><\/li><li class=\"\"><a href=\"#typische-einsatzbereiche\">Typical Applications<\/a><\/li><li class=\"\"><a href=\"#sichere-verbindung-zwischen-wechselrichter-und-netz\">Secure Connection between Inverter and Grid<\/a><\/li><li class=\"\"><a href=\"#aufgaben-einer-ac-anschlussbox-in-der-pv-anlage\">Functions of an AC Connection Box in a PV System<\/a><\/li><li class=\"\"><a href=\"#aufbau\">Design of an AC Connection Box<\/a><\/li><li class=\"\"><a href=\"#technische-auslegungskriterien\">Technical Design Criteria<\/a><\/li><li class=\"\"><a href=\"#netzformen-und-schutzkonzepte\">Grid Types and Protection Concepts<\/a><\/li><li class=\"\"><a href=\"#uberspannungsschutz-auf-der-ac-seite\">Surge Protection on the AC Side<\/a><\/li><li class=\"\"><a href=\"#kompakte-losung-fur-tn-s-netze-q-3-surge-box-tn-s-compact\">Compact solution for TN-S networks: Q3 SurgeBox TN-S Compact<\/a><\/li><li class=\"\"><a href=\"#norm\">Normative Requirements<\/a><\/li><li class=\"\"><a href=\"#l\u00f6sung\">Standardized or System-Specific Solution?<\/a><\/li><li class=\"\"><a href=\"#entsteht\">How a Q3 AC Connection Box Is Developed<\/a><\/li><li class=\"\"><a href=\"#abgrenzung-zur-dc-anschlusstechnik\">Distinction from DC Connection Technology<\/a><\/li><li class=\"\"><a href=\"#projektanfrage-ac-anschlussbox\">AC Connection Box Project Request<\/a><\/li><li class=\"\"><a href=\"#technische-unterlagen-ac-box\">Technical Documents for AC Connection Boxes<\/a><\/li><\/ul><\/nav><\/div>\n\n\n\n<div class=\"wp-block-columns has-neve-link-color-color has-text-color has-link-color wp-elements-4e43551d501b8b981aed908dc7ded848 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-bottom has-nv-site-bg-color has-text-color has-link-color wp-elements-3062d9d052ea1f6f5b64a29c1b690675 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:100%\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"was-ist-eine-ac-anschlussbox\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-8fc8c91488bc4eeb49674df6b9cae52e\" style=\"font-size:28px\">What Is an AC Connection Box?<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-46ff0371c1a7a5e9c33031a79d33a561 wp-block-paragraph\" style=\"font-size:16px\">An AC Connection Box forms the defined interface between the inverter and the low-voltage grid or building installation. It combines protection, switching, and distribution functions in a standards-compliant switchgear assembly according to EN 61439. <\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-7b5c70bb377d5963f5caa4304a488268 wp-block-paragraph\" style=\"font-size:16px\">In contrast to DC connection technology on the generator side, the AC box handles the grid-side integration of the PV system. It ensures that current, voltage, and the protection concept are correctly adapted to the existing infrastructure. <\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-90 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-left alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-b4e9a5eed16a2f065b2e15124896d574\" id=\"typische-einsatzbereiche\">Typical Applications<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-80c262a8786738fb44451c8a08e0ea42 wp-block-paragraph\" style=\"font-size:16px\">AC Connection Boxes are particularly used in:<\/p>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-top has-neve-link-color-color has-text-color has-link-color wp-elements-c31dfa8d056569602a7afe6a5bc703a0 is-layout-flex wp-container-core-columns-is-layout-5e6aac66 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:33.34%\">\n<div class=\"wp-block-group dc-card\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-99531212\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-industry\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"gewerblichen-und-industriellen-pv-anlagen\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-92a6e3755fde39b7fbcf8dbb6aabc0a5\" style=\"font-size:16px\"><strong>Commercial and industrial<\/strong><br><strong>PV systems<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group dc-card\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-ef43b35f\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-battery-half\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"speicherintegration-auf-ac-seite\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-20ed7ca4e0fc0b49e40aa709b42f6a79\" style=\"font-size:16px\"><strong>Storage integration<\/strong><br><strong>on the AC side<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.34%\">\n<div class=\"wp-block-group dc-card\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-f8b5a60a\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-align-center\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"zentralen-wechselrichterkonzepten\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-f3315a6e636ccbb4325d0deb18d50e7d\" style=\"font-size:16px\"><strong>Central<\/strong><br><strong>inverter concepts<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group dc-card\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-cd842345\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-network-wired\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"definierten-netzanschlusspunkten-gemass-vde-vorgaben\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-5adce5b56d409caa94f038adfff9f816\" style=\"font-size:16px\"><strong>Defined grid connection points<\/strong><br><strong>according to VDE specifications<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-group dc-card\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-ecd02c60\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-layer-group\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"mehreren-wechselrichtern-mit-gemeinsamer-einspeisung\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-b1832bca6e91357928f7f3db349b806d\" style=\"font-size:16px\"><strong>Multiple inverters<\/strong><br><strong>with common grid feed-in<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-13363878c76d04bb3644f9c63454f05f wp-block-paragraph\" style=\"font-size:16px\">They can be designed as pure feed-in boxes, as collection boxes for multiple inverters, or as transfer points to the main distribution board.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-dark-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-center has-nv-dark-bg-background-color has-background is-layout-flex wp-container-core-columns-is-layout-f54850f0 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--50);padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-right:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20);flex-basis:50%\">\n<h2 id=\"sichere-verbindung-zwischen-wechselrichter-und-netz\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-649a631424ded03c76751e141b5ab8d6\" style=\"font-size:28px\">Secure Connection between Inverter and Grid<\/h2>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-4e0a6f04f6feb4d5313f62eed8a73839 wp-block-paragraph\" style=\"font-size:16px\">In photovoltaic systems, AC Connection Boxes perform the central task of connecting inverters safely, in compliance with standards, and in a maintenance-friendly manner to the low-voltage grid, the grid transfer point, or the transformer. They bundle high AC currents, integrate protection and switching devices, and create a clear, defined interface between generation and the grid. <\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-30e2625b2299c702529258a5661ab859 wp-block-paragraph\" style=\"font-size:16px\">Q3 <em>ENERGIE<\/em>&#8216;s AC connection technology is designed for use in commercial, industrial, and grid-connected PV applications and is planned, constructed, and tested as a low-voltage switchgear assembly according to EN 61439.<\/p>\n\n\n\n<div style=\"height:50px\" 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 dc-card is-style-secondary\"><a class=\"wp-block-button__link has-neve-text-color-color has-text-color has-link-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/products\/ac-box-for-pv-systems-up-to-630-a\/\" style=\"border-width:1px\">More about the Q3 AC Connection Box product \u2192<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"533\" height=\"533\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Niederspannungsnetz.webp\" alt=\"Low-voltage network\" class=\"wp-image-2065\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Niederspannungsnetz.webp 533w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Niederspannungsnetz-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Niederspannungsnetz-150x150.webp 150w\" sizes=\"auto, (max-width: 533px) 100vw, 533px\" \/><\/figure>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" class=\"wp-block-cover__image-background wp-image-2029 size-full\" alt=\"AC Anschlussbox zum Anschluss an Netz\u00fcbergabe\/Trafo. Netzform TN-C. 4x Sammelschiene 30 x 10 CU. Eingang Wechselrichter f\u00fcr Kabel 4 x 300 mm\u00b2 \u00fcber M80 Kabelverschraubung Messing auf 4 Sammelschienenklemmen. Ausgang zum Trafo f\u00fcr Kabel 4 x 300 mm\u00b2 \u00fcber M80 Kabelverschraubung Messing auf 4 Sammelschienenklemmen (beide Kabel werden bauseits angebracht). Zus\u00e4tzliche Anschlussm\u00f6glichkeit f\u00fcr Kabel 1 x 300 mm\u00b2 auf 1 Sammelschienenklemme. \u00dcberspannungsschutz T1+2\u00a0 (Standard Citel DAC1-13S-30-275 Imax 50kA, Iimp 12,5kA) inkl. Kurzschluss-Schutz SFD1-13S-30 f\u00fcr AC SPD T1 (12,5kA 10\/350\u00b5s). Anschluss Fernmeldekontakt \u00fcber M16 Kunststoff (Kabel wird bauseits angebracht). Membran M20. Geh\u00e4use verzinktes Stahlblech mit geh\u00e4rteter Polyester-Lackbeschichtung 800x600x300 mm mit T\u00fcr. Aufkleber Vorsicht Hochspannung.\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px.webp\" style=\"object-position:46% 27%\" data-object-fit=\"cover\" data-object-position=\"46% 27%\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px.webp 800w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-768x768.webp 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-text-color-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-9ff7fd1509394ba913895d2729b7ca0d\" id=\"aufgaben-einer-ac-anschlussbox-in-der-pv-anlage\">Functions of an AC Connection Box in a PV System<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-1522aeb5579305dd56dc8f87bc527ad3 wp-block-paragraph\" style=\"font-size:16px\">AC Connection Boxes fulfill several safety- and operation-relevant functions within the PV system:<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-top has-neve-link-color-color has-text-color has-link-color wp-elements-4c6c47d8400afa492855722f85f5167b is-layout-flex wp-container-core-columns-is-layout-34acad51 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--50);padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-top has-nv-site-bg-color has-text-color has-link-color wp-elements-fe67631bf39ff27f57c0266915c3cef5 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-06b77a61\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-6adf424d\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>safe feed-in of inverter power towards the grid or transformer<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-48190b8b\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>bundling of high currents with large conductor cross-sections<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-953a992c\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>integration of disconnecting, switching, and protection functions<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-fede531c\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-6d2c6cdd\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>protection of inverters and downstream components against overvoltages<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-ff1748c6\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>clear separation of inverter and grid sides<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-e57bcced\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>simplified maintenance, inspection, and service<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-vertical is-content-justification-center is-layout-flex wp-container-core-group-is-layout-8664d8a3 wp-block-group-is-layout-flex\" style=\"padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\">\n<div style=\"height:0px\" aria-hidden=\"true\" class=\"wp-block-spacer wp-container-content-62aae154\"><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"dc-card has-nv-text-dark-bg-color has-text-color has-background has-link-color wp-elements-f76d121038a752dc20f5035b730e7848 wp-block-paragraph\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;border-top-style:none;border-top-width:0px;border-right-style:none;border-right-width:0px;border-bottom-style:none;border-bottom-width:0px;border-left-width:1px;background-color:#262626;font-size:16px\">They do not replace a building&#8217;s sub-distribution, but rather form a powerful interface specifically designed for PV applications between generation and the grid connection point.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"Technische Details\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-text-dark-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-64ec4a9989ce63edaf66b0b4013d4d75\" id=\"aufbau\">Design of an AC Connection Box<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-12ef7bb7891c9f09366939c750d12881 wp-block-paragraph\" style=\"font-size:16px\"><em>The specific structure is project-specific; typical components include:<\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide has-neve-link-color-color has-text-color has-link-color wp-elements-acd9dea7de19df9c25e65e80aa671d62 is-layout-flex wp-container-core-columns-is-layout-822b08ab wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-vertically-aligned-top has-nv-site-bg-color has-text-color has-link-color wp-elements-6369839bdcb71dba771e602f5b4ddabb is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-a050c9dc\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-d704894d\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Main switch or load disconnector<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-51e09970\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>NH fuses or circuit breakers<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-dfdcf125\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Busbars (dimensioned according to rated current and short-circuit withstand capability)<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-1c5ef249\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-e1ae580d\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Surge protection Type 1 or Type 2 according to EN 61643-11<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-a45f7bdd\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Connection terminals for incoming and outgoing lines<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-0c5a8fb9\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-sliders-h wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Optional: Measurement or monitoring devices<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-437b9673 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"dc-card has-neve-text-color-color has-nv-light-bg-background-color has-text-color has-background has-link-color wp-elements-7bef45878b64a857cdeddba99c907b74 wp-block-paragraph\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;border-top-style:none;border-top-width:0px;border-right-style:none;border-right-width:0px;border-bottom-style:none;border-bottom-width:0px;border-left-width:1px;font-size:16px\"><em>The unit is designed as a low-voltage switchgear and controlgear assembly in accordance with EN 61439-1 \/ -2.<\/em><br><br><strong>Where a complete AC distribution board is not required, AC-side surge protection can also be implemented separately as a compact protection box \u2013 for example with the <a href=\"https:\/\/q3-energie.de\/en\/products\/surge-protection-box-tn-s\/\" data-type=\"page\" data-id=\"8912\">Q3 SurgeBox TN-S Compact <\/a>for TN-S networks.<\/strong><\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<h2 class=\"wp-block-heading has-text-align-left alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-1ce82bfd956e9bbffea03f9f6daf778f\" id=\"technische-auslegungskriterien\" style=\"font-size:28px\">Technical Design Criteria<\/h2>\n\n\n\n<h3 class=\"wp-block-heading alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-57dcd17338f1d2cb32007789441aa914\" id=\"die-dimensionierung-einer-ac-anschlussbox-richtet-sich-nach\" style=\"font-size:16px\">The dimensioning of an AC connection box is based on:<\/h3>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-top has-neve-link-color-color has-text-color has-link-color wp-elements-574a21a3a2d0cc6c6c6810e0c657e114 is-layout-flex wp-container-core-columns-is-layout-0e642418 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:0;padding-bottom:var(--wp--preset--spacing--40);padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:33.34%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\" style=\"font-size:20px\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-d56461c2\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"nennstrom-des-wechselrichters-bzw-der-einspeiseleistung\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-67bb3cfc95c58c712c52dd0766539c9f\" style=\"font-size:20px\"><strong>Rated current of the inverter<\/strong><br><strong>or feed-in power<\/strong><\/h3>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-94db6988\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"netzform-tn-s-tn-c-tt\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-7f2b1ae5fbefb2a84e1d6fe051207e98\" style=\"font-size:20px\"><strong>Grid type<\/strong><br><strong>(TN-S, TN-C, TT)<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.34%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-394903a8\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"kurzschlussleistung-am-netzanschlusspunkt\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-19b58096ca2d0bde526ab187ca287a0d\" style=\"font-size:20px\"><strong>Short-circuit power at the grid connection point<\/strong><\/h3>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-a8c75ec3\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"selektivitat-zu-vorgeschalteten-schutzorganen\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-925123338533369f5b77f106de64fc15\" style=\"font-size:20px\"><strong>Selectivity to upstream protective devices<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\" style=\"font-size:16px\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-b71f39d4\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"bemessungsspannung-z-b-400-v-ac\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-a8146986b1bb911f39d0dcbb1979f55e\" style=\"font-size:20px\"><strong>Rated voltage<\/strong><br><strong>(e.g., 400 V AC)<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group dc-card is-nowrap is-layout-flex wp-container-core-group-is-layout-f221bfd0 wp-block-group-is-layout-flex\">\n<div id=\"wp-block-themeisle-blocks-font-awesome-icons-6978b014\" class=\"wp-block-themeisle-blocks-font-awesome-icons\"><span class=\"wp-block-themeisle-blocks-font-awesome-icons-container\"><i class=\"fas fa-sliders-h\"><\/i><\/span><\/div>\n\n\n\n<h3 id=\"thermischer-belastbarkeit-der-sammelschienen\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-0e3993f5e8ad33b6e8f5c40592f877bf\" style=\"font-size:20px\"><strong>Thermal load capacity of the busbars<\/strong><\/h3>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-top has-neve-link-color-color has-text-color has-link-color wp-elements-4dc023d9df3a67f4315bf58498b3a45a is-layout-flex wp-container-core-columns-is-layout-5e6aac66 wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--40);padding-right:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40);padding-left:var(--wp--preset--spacing--40)\">\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:100%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-884799b9090011efb2c6462dfb3a1d8f wp-block-paragraph\" style=\"font-size:16px\">Correct design considers both continuous current and potential short-circuit currents and their breaking capacity.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"533\" height=\"533\" class=\"wp-block-cover__image-background wp-image-2063 size-full\" alt=\"Stromnetz\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp\" style=\"object-position:48% 34%\" data-object-fit=\"cover\" data-object-position=\"48% 34%\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp 533w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-150x150.webp 150w\" sizes=\"auto, (max-width: 533px) 100vw, 533px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-link-color-background-color has-background-dim-90 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-eaa284ca4b5ea2e571aa41b5145f39bb\" id=\"netzformen-und-schutzkonzepte\" style=\"font-size:28px\">Grid Types and Protection Concepts<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-center has-neve-link-color-color has-text-color has-link-color wp-elements-13030ef0b8d19122477b8bb80b02c1ec is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-center has-nv-site-bg-color has-text-color has-link-color wp-elements-f41f6f8d6cdbd61f1a33668d8874f824 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--50);padding-left:0;flex-basis:66%\">\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">The configuration of the AC connection box is largely determined by the existing earthing system:<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-06b03173\" class=\"wp-block-themeisle-blocks-icon-list  is-style-horizontal\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-dba78e01\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-network-wired wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>TN-S<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-9db3731a\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-network-wired wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>TN-C<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-7ded4119\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-network-wired wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>TT<\/strong><\/p><\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">The protection concept defines:<\/p>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-c57f888b\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-92c5f527\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Type and position of surge protection<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-19cd73da\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft delay-1s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Design of the protective conductor routing<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-dc4672ba\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft delay-2s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Selective protection<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-bb38ea45\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft delay-3s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Coordination with grid operator specifications<\/strong><\/p><\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-bee13ea58daadcda6a5bb6a22cc30981 wp-block-paragraph\" style=\"font-size:16px\">Especially for systems with high feed-in power, considering short-circuit withstand capability is mandatory.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--50);padding-left:0;flex-basis:50%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"533\" height=\"533\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp\" alt=\"Power grid\" class=\"wp-image-2063\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp 533w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-150x150.webp 150w\" sizes=\"auto, (max-width: 533px) 100vw, 533px\" \/><\/figure>\n<\/div><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"Technische Details\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-434e266e5b6e03f7627dd72a9de51361\" id=\"uberspannungsschutz-auf-der-ac-seite\">Surge Protection on the AC Side<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-bottom has-neve-link-color-color has-text-color has-link-color wp-elements-972e0c4473436e4738f073d71a24d3a5 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-bottom has-nv-site-bg-color has-text-color has-link-color wp-elements-33425bcdc3235a68abe3b6c9492a9c56 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-347fd8d99fc787e18324b4bf87800be3 wp-block-paragraph\" style=\"font-size:16px\"><em>On the AC side, overvoltages arise, among other things, from:<\/em><\/p>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-43343aa1\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-3f092f9b\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft\"><i class=\"fas fa-bolt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Lightning events<\/strong><br><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-5949fa1b\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft delay-1s\"><i class=\"fas fa-bolt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Switching operations in the grid<\/strong><br><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-7721537a\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card animated fadeInLeft delay-2s\"><i class=\"fas fa-bolt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Repercussions from the supply grid<\/strong><br><\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-bottom is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"dc-card has-neve-text-color-color has-nv-light-bg-background-color has-text-color has-background has-link-color wp-elements-19b9f0d94e22924fa9f4ad363d3c0b11 wp-block-paragraph\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;border-left-color:var(--nv-text-color);border-left-width:1px;font-size:16px\">Q3 AC Connection Boxes can be equipped with surge protective devices of types <a href=\"https:\/\/www.vde.com\/en\/lightning-protection\" data-type=\"link\" data-id=\"https:\/\/www.vde.com\/en\/lightning-protection\" target=\"_blank\" rel=\"noopener\">1+2 or 1+2+3<\/a>. Integration is close to the current path and coordinated with the respective grid type. Remote signaling contacts for status monitoring can be optionally integrated.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 id=\"kompakte-losung-fur-tn-s-netze-q-3-surge-box-tn-s-compact\" class=\"wp-block-heading\">Compact solution for TN-S networks: Q3 SurgeBox TN-S Compact<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For applications where a complete AC distribution board with busbars, switch-disconnectors or feed-in function is not required, the Q3 SurgeBox TN-S Compact provides a compact surge protection box for TN-S networks.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The box combines AC-side surge protection Type 1+2+3, an integrated fuse\/disconnector unit, plug-in protection modules, optical status indication and a prepared remote signalling contact in a ready-to-connect polycarbonate enclosure.<\/p>\n<\/div>\n<\/div>\n\n\n\n<div style=\"height:30px\" 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:\/\/q3-energie.de\/en\/products\/surge-protection-box-tn-s\/\">View Q3 SurgeBox TN-S Compact \u2192<\/a><\/div>\n<\/div>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"Technische Details\n\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-text-color-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div class=\"wp-block-columns alignwide has-neve-link-color-color has-text-color has-link-color wp-elements-9feafb90b3b545bc2c7acfd97390a247 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-bottom has-nv-site-bg-color has-text-color has-link-color wp-elements-b0b8c3b9a16639ce6680b59db7a3afa2 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"norm\" class=\"wp-block-heading has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-fb0e9708791b9634a1fa97cccc0ab47d\">Normative Requirements<\/h2>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:16px\">For AC connection boxes, the following requirements are particularly relevant:<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-bottom is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<blockquote class=\"wp-block-quote has-border-color has-nv-text-dark-bg-border-color is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-90569ff742ba10b5f373dd71fca87217 wp-block-paragraph\" style=\"font-size:16px\"><em>Compliance with these standards ensures electrical safety and conformity with applicable technical regulations.<\/em><\/p>\n<\/blockquote>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide has-neve-link-color-color has-text-color has-link-color wp-elements-931de87d88051f062c9de812d49957b2 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-bottom has-nv-site-bg-color has-text-color has-link-color wp-elements-db44b210fe62c2cf9a757f495392d34e is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-7413ef0f\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-1a1ae030\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-layer-group wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>EN 61439-1 \/ -2 \u2013 Low-voltage switchgear and controlgear assemblies<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-c2458d08\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-box wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>EN 62208 \u2013 <\/strong> <strong>Empty enclosures<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-bottom is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0;flex-basis:50%\">\n<div id=\"wp-block-themeisle-blocks-icon-list-0cf09527\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-4e343fab\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-toggle-off wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>EN 60947-1 \/ -3 \u2013 Switchgear and load break switches<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-298d1e13\" class=\"wp-block-themeisle-blocks-icon-list-item dc-card\"><i class=\"fas fa-bolt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>EN 61643-11 \u2013 Surge protective devices<\/strong><\/p><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"533\" height=\"533\" class=\"wp-block-cover__image-background wp-image-2063 size-full\" alt=\"Stromnetz\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp\" style=\"object-position:48% 34%\" data-object-fit=\"cover\" data-object-position=\"48% 34%\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz.webp 533w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Netz-150x150.webp 150w\" sizes=\"auto, (max-width: 533px) 100vw, 533px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-site-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-6638d851ac0207e6834a5b54ba54f43b\" id=\"l\u00f6sung\" style=\"font-size:28px\">Standardized or System-Specific Solution?<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide are-vertically-aligned-center has-neve-link-color-color has-text-color has-link-color wp-elements-e6817dfb0c987fcf218e37b4fdd7a500 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-center has-nv-site-bg-color has-text-color has-link-color wp-elements-6f7218ab71064c2be23942f880207d53 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:0;padding-bottom:var(--wp--preset--spacing--50);padding-left:0;flex-basis:50%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-398f570874add045ea17d5dc5ead71c3 wp-block-paragraph\" style=\"font-size:16px\">AC connection boxes can be supplied as standardised variants or manufactured on a project-specific basis.<\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-f13aeec9e22125947281cc5981188c21 wp-block-paragraph\" style=\"font-size:16px\">For customized designs, the following are adapted:<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-eb28cded\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-c7c1fa7e\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Busbar cross-section<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-b539fba8\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-1s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Protective devices<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-3ff4ed54\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-2s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Enclosure size<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-b2b1c594\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-3s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Connection concept<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-1b97c2cd\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-4s\"><i class=\"fas fa-clipboard-check wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Degree of protection (e.g., IP54, IP65)<\/strong><\/p><\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-34f9616c6d9db34478814974aa435811 wp-block-paragraph\" style=\"font-size:16px\">to the respective project requirement.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:50%\"><div class=\"wp-block-image q3-duotone\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a6fe0fa61f23&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a6fe0fa61f23\" class=\"aligncenter size-full wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"800\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px.webp\" alt=\"AC connection box for connection to grid transfer point\/transformer. Network type TN-C. 4x busbar 30 x 10 CU. Inverter input for cable 4 x 300 mm\u00b2 via M80 brass cable gland to 4 busbar terminals. Output to transformer for cable 4 x 300 mm\u00b2 via M80 brass cable gland to 4 busbar terminals (both cables to be installed on-site). Additional connection option for cable 1 x 300 mm\u00b2 to 1 busbar terminal. Surge protection T1+2 (standard Citel DAC1-13S-30-275 Imax 50kA, Iimp 12.5kA) including short-circuit protection SFD1-13S-30 for AC SPD T1 (12.5kA 10\/350\u00b5s). Remote signaling contact connection via M16 plastic (cable to be installed on-site). M20 membrane. Enclosure galvanized sheet steel with hardened polyester coating 800x600x300 mm with door. High voltage warning label.           \" class=\"wp-image-2029\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px.webp 800w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-768x768.webp 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"dc-card has-neve-text-color-color has-text-color has-background has-link-color wp-elements-df99d04718bcd129ce31ded16d21a1cf wp-block-paragraph\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;border-left-color:var(--nv-text-color);border-left-width:1px;background-color:#f2f2f2\">In addition to large AC connection boxes for PV and storage projects, we also offer compact AC protection solutions for defined applications. The <a href=\"https:\/\/q3-energie.de\/en\/products\/surge-protection-box-tn-s\/\" data-type=\"page\" data-id=\"8912\">Q3 SurgeBox TN-S Compact<\/a> is a standard configuration for AC-side surge protection in TN-S networks and can be adapted on a project-specific basis where required. <\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-465 size-full\" alt=\"Technischer Hintergrund\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background2_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-text-dark-bg-background-color has-background-dim-60 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h2 id=\"entsteht\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-ab3089b59568e78468bb133ffc73e5d8\" style=\"font-size:28px\">How a Q3 AC Connection Box Is Developed<\/h2>\n\n\n\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-e6d737d5675122af4205c0b33dc85b9a wp-block-paragraph\" style=\"font-size:16px\">Each Q3 AC connection box is designed and manufactured on the basis of the project-specific requirements.<br><br>After reviewing the electrical key data \u2013 in particular rated current, short-circuit power, earthing system and protection concept \u2013 the technical dimensioning is carried out for:<\/p>\n\n\n\n<h3 id=\"\u25a0-sammelschienen-und-leiterquerschnitten-\u25a0-schalt-und-schutzgeraten-\u25a0-uberspannungsschutz-\u25a0-gehausegrosse-und-schutzart\" class=\"wp-block-heading has-neve-text-color-color has-text-color has-link-color wp-elements-d8d7513b76df4b7c1de793f487c7a394\" style=\"font-size:16px\">\u25a0 Busbars and conductor cross-sections<br><br>\u25a0 Switching and protective devices<br><br>\u25a0 Surge protection<br><br>\u25a0 Enclosure size and degree of protection<\/h3>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-a52cd71f56436545c919800e39f9cb8c wp-block-paragraph\" style=\"font-size:16px\">The design is carried out according to EN 61439 as a tested low-voltage switchgear assembly.<br>Both thermal load capacity and selectivity, as well as mechanical requirements, are taken into account.<\/p>\n\n\n\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-535681c862ed5c07c834483c4b40c82d wp-block-paragraph\" style=\"font-size:16px\">This results in an AC Connection Box that is not only standards-compliant but also precisely tailored to the respective system structure.<\/p>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns alignwide is-layout-flex wp-container-core-columns-is-layout-5b0bc1de wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-vertically-aligned-stretch is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image q3-duotone\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a6fe0fa63fec&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a6fe0fa63fec\" class=\"aligncenter size-thumbnail wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/05\/250-A-AC-Anschlussbox-mit-Ueberspannungsschutz-T1-2-TN-S-800px-150x150.webp\" alt=\"250 A AC Connection Box with Surge Protection T1-2 TN-S \" class=\"wp-image-5404\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/05\/250-A-AC-Anschlussbox-mit-Ueberspannungsschutz-T1-2-TN-S-800px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/05\/250-A-AC-Anschlussbox-mit-Ueberspannungsschutz-T1-2-TN-S-800px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/05\/250-A-AC-Anschlussbox-mit-Ueberspannungsschutz-T1-2-TN-S-800px-768x769.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/05\/250-A-AC-Anschlussbox-mit-Ueberspannungsschutz-T1-2-TN-S-800px.webp 800w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image q3-duotone\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a6fe0fa64495&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a6fe0fa64495\" class=\"aligncenter size-thumbnail wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-150x150.webp\" alt=\"AC connection box for connection to grid transfer point\/transformer. Network type TN-C. 4x busbar 30 x 10 CU. Inverter input for cable 4 x 300 mm\u00b2 via M80 brass cable gland to 4 busbar terminals. Output to transformer for cable 4 x 300 mm\u00b2 via M80 brass cable gland to 4 busbar terminals (both cables to be installed on-site). Additional connection option for cable 1 x 300 mm\u00b2 to 1 busbar terminal. Surge protection T1+2 (standard Citel DAC1-13S-30-275 Imax 50kA, Iimp 12.5kA) including short-circuit protection SFD1-13S-30 for AC SPD T1 (12.5kA 10\/350\u00b5s). Remote signaling contact connection via M16 plastic (cable to be installed on-site). M20 membrane. Enclosure galvanized sheet steel with hardened polyester coating 800x600x300 mm with door. High voltage warning label.           \" class=\"wp-image-2029\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px-768x768.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-BOX-TNC-630-A_800px.webp 800w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n<div class=\"wp-block-image q3-duotone\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a6fe0fa65500&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a6fe0fa65500\" class=\"aligncenter size-thumbnail wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/neu.q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box_offen_transparent-150x150.webp\" alt=\"AC Surge Box with SPD DEHN 941 405 Type T1 &amp; T2. In busbar enclosure MI6457. 2 x cable glands for 5 x 95mm cable M63. 2xM25 glands for PE. Busbars for TN-S with 10 connection terminals for up to 120mm. Ventilation flange. NH disconnector 3 x 160 A. Contact protection on busbars of L1,2,3. Wall bracket Z profile Mi MS 2.       \" class=\"wp-image-2031\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box_offen_transparent-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box_offen_transparent-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box_offen_transparent-768x768.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box_offen_transparent.webp 800w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div class=\"wp-block-image q3-duotone\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a6fe0fa66200&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a6fe0fa66200\" class=\"aligncenter size-thumbnail wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-150x150.webp\" alt=\"250 A AC connection box (inverter - grid transfer point). 1 inverter input. Standard TN-C, option TN-S to inverter section. Coating: C4 (outdoor). Inverter busbar terminals: inverter terminal 95\u2013120 mm\u00b2 \u2013 required: 5 units. Grid transfer point busbar terminals: grid transfer point terminal 95\u2013120 mm\u00b2 \u2013 required: 5 units. Surge protection T1+T2: TN\u2013S - 3+1 (L\u2013N + N\u2013PE). Remote signals: SPD failure, NH-OFF (potential-free). Cable entries inverter: \u2022 Inverter M75 (\u00d8 42\u201355 mm) \u00d7 1 Cable entry grid transfer point: \u2022 Grid transfer point M75 (\u00d8 42\u201355 mm) \u00d7 1 M20 membrane for signals\/service.        \" class=\"wp-image-2030\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px-768x768.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/250-A-AC-Anschlussbox-TN-C-mit-NH-Trenner-800-px.webp 800w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top is-layout-flow wp-block-column-is-layout-flow\">\n<div id=\"wp-block-themeisle-blocks-accordion-8c25616c\" class=\"wp-block-themeisle-blocks-accordion has-gap icon-first has-icon has-open-icon has-dark-title-bg has-dark-active-title-bg is-style-default\">\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>1. Mechanical Base and Mounting Plate<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_1.webp\" alt=\"Plan AC Box 1\" class=\"wp-image-2032\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-5312d4d6414e0a0fb3a218cb1e7bb189 wp-block-paragraph\" style=\"font-size:16px\">Stable mounting plate with defined fastening, insulation, and grounding points as a basis for busbars, terminals, and switchgear.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>2. Busbar System Assembly<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_2.webp\" alt=\"Plan AC Box 2\" class=\"wp-image-2033\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-bed40bb10e69083bef0aa022e52844e4 wp-block-paragraph\" style=\"font-size:16px\">Installation and dimensioning of solid copper busbars according to rated current, grid type, and short-circuit withstand capability.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>3. Connection Terminals and Cable Outlets<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_3.webp\" alt=\"Plan AC Box 3\" class=\"wp-image-2034\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-139960b9f210c7878e53bcaeab4e468b wp-block-paragraph\" style=\"font-size:16px\">Integration of high-performance connection terminals for preparing inverter and transformer connections for large conductor cross-sections.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>4. Integration of Protective and Switching Devices<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_4.webp\" alt=\"Plan AC Box 4\" class=\"wp-image-2035\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-863a22e59b2ccfff8141597695ba3be1 wp-block-paragraph\" style=\"font-size:16px\">Integration of NH load disconnectors and surge protective devices directly in the defined current path.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>5. Protection Against Accidental Contact and Electrical Safety<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_5.webp\" alt=\"Plan AC Box 5\" class=\"wp-image-2036\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-2ac6fa55b059a5cff36e74a229e4eaaa wp-block-paragraph\" style=\"font-size:16px\">Covering active parts with transparent protective covers according to IP2X\/IPXXB for safe operation and maintenance.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>6. Cable Entry and Strain Relief<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_6.webp\" alt=\"Plan AC Box 6\" class=\"wp-image-2037\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-9e872e043649761d3bfdda333d6df92f wp-block-paragraph\" style=\"font-size:16px\">Preparation of cable entries with suitable glands and mechanical strain relief.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>7. Installation in the Enclosure<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_7.webp\" alt=\"Plan AC Box 7\" class=\"wp-image-2038\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-b164226545d04974cd8f6d94df54eda4 wp-block-paragraph\" style=\"font-size:16px\">Installation of the equipped mounting plate into the IP66 enclosure for indoor or outdoor use, including door grounding.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n\n\n\n<details class=\"wp-block-themeisle-blocks-accordion-item dc-card\"><summary class=\"wp-block-themeisle-blocks-accordion-item__title\"><div>8. Testing and Documentation<\/div><\/summary><div class=\"wp-block-themeisle-blocks-accordion-item__content\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-8f761849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33%\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"200\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Box-planen_8.webp\" alt=\"Plan AC Box 8\" class=\"wp-image-2039\" title=\"\"><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-center is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-0efdd842ee0f157092f3024c028ae937 wp-block-paragraph\" style=\"font-size:16px\">Routine test according to EN 61439, labeling, and complete technical documentation.<\/p>\n<\/div>\n<\/div>\n<\/div><\/details>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\"><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-text-color-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<div class=\"wp-block-columns alignwide has-neve-text-color-background-color has-background is-layout-flex wp-container-core-columns-is-layout-5b0bc1de wp-block-columns-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 id=\"abgrenzung-zur-dc-anschlusstechnik\" class=\"wp-block-heading has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-4acd21d2c1d6e32dae50ece8a442c351\">Distinction from DC Connection Technology<\/h2>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-aaa32c384ae66dbf2a023f6e17a8ac5d wp-block-paragraph\" style=\"font-size:16px\">While DC connection boxes relate to the string level of the PV generator, AC connection technology operates on the AC side after the inverter. Accordingly, the following differ: <\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-3b1c8cc4\" class=\"wp-block-themeisle-blocks-icon-list\">\n<div id=\"wp-block-themeisle-blocks-icon-list-item-983afde8\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft\"><i class=\"fas fa-shield-alt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Protection concepts<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-d30e2db5\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-1s\"><i class=\"fas fa-bolt wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Current and voltage ranges<\/strong><\/p><\/div>\n\n\n\n<div id=\"wp-block-themeisle-blocks-icon-list-item-63c4fa00\" class=\"wp-block-themeisle-blocks-icon-list-item animated fadeInLeft delay-2s\"><i class=\"fas fa-file-pdf wp-block-themeisle-blocks-icon-list-item-icon-custom\"><\/i><p class=\"wp-block-themeisle-blocks-icon-list-item-content-custom\"><strong>Normative Requirements<\/strong><\/p><\/div>\n<\/div>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-99adeb00eaf56464c9ba1ba79c3d9f5c wp-block-paragraph\" style=\"font-size:16px\"><br>Both systems complement each other and together form a safe overall system.<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-cover alignfull\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"800\" class=\"wp-block-cover__image-background wp-image-454 size-full\" alt=\"Technische Details\n\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px.webp 1920w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-300x125.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1024x427.webp 1024w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-768x320.webp 768w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/01\/Background_1920px-1536x640.webp 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-nv-text-dark-bg-background-color has-background-dim-100 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-flow wp-block-cover-is-layout-flow\">\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading alignwide has-neve-text-color-color has-text-color has-link-color wp-elements-11c8fdcc564b818c7d2296550a86b1cd\" id=\"projektanfrage-ac-anschlussbox\">AC Connection Box Project Request<\/h2>\n\n\n\n<div class=\"wp-block-columns alignwide has-neve-link-color-color has-text-color has-link-color wp-elements-8b93deda63516e69d267185994017409 is-layout-flex wp-container-core-columns-is-layout-0fb72d45 wp-block-columns-is-layout-flex\" style=\"padding-top:0;padding-right:0;padding-bottom:0;padding-left:0\">\n<div class=\"wp-block-column is-vertically-aligned-bottom has-nv-site-bg-color has-text-color has-link-color wp-elements-5d43f90d37bb02258388cbfa097f3f20 is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);flex-basis:50%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-f84216d59c67e3d8aca669612732befb wp-block-paragraph\" style=\"font-size:16px\"><strong>Would you like to design an AC connection box for a specific project, have technical details reviewed or select the right configuration for your photovoltaic or storage system?<\/strong><br><br><br>Using the inquiry form below, we collect all relevant project data in a structured and transparent manner.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-bottom is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50);flex-basis:50%\">\n<p class=\"has-neve-text-color-color has-text-color has-link-color wp-elements-1aa5df6bee0d4a3a7f5b61b54e4d8ae7 wp-block-paragraph\" style=\"font-size:16px\"><em>You are welcome to send circuit diagrams, grid requirements, protection concepts, or other technical documentation directly. Based on this, we review the electrical parameters, dimension busbars, protective devices, and connection points, and design the AC Box to match your project. <\/em><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-buttons alignwide is-layout-flex wp-block-buttons-is-layout-flex\" style=\"padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 dc-card is-style-secondary\"><a class=\"wp-block-button__link has-neve-text-color-color has-text-color has-link-color has-border-color has-neve-text-color-border-color has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/products\/project-inquiry\/qfire-pv-firefighter-switch\/\" style=\"border-width:1px\">Start AC Connection Box Project Request \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group alignfull has-nv-c-2-background-color has-background\" id=\"produkte\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-right:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-container-core-group-is-layout-e59bffbc wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-columns alignfull is-layout-flex wp-container-core-columns-is-layout-5b0bc1de wp-block-columns-is-layout-flex\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-top:var(--wp--preset--spacing--50);padding-right:var(--wp--preset--spacing--50);padding-bottom:var(--wp--preset--spacing--50);padding-left:var(--wp--preset--spacing--50)\">\n<div class=\"wp-block-column is-vertically-aligned-top animated fadeIn q3-product-card has-large-font-size is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20)\">\n<div class=\"wp-block-cover aligncenter has-custom-content-position is-position-bottom-center\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"400\" class=\"wp-block-cover__image-background wp-image-1733 size-full\" alt=\"Anfrage\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage.webp 400w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-link-color-background-color has-background-dim-80 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-0255ba1e wp-block-cover-is-layout-constrained\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-5ea5b916c2b4f026c1e0740ffaf112b9\" id=\"projektanfrage-ac-anschlussbox-1\" style=\"font-size:20px\">Project Request<br>AC Connection Box<\/h2>\n\n\n<div class=\"wp-block-image wp-duotone-unset-1\">\n<figure class=\"aligncenter size-thumbnail has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage-150x150.webp\" alt=\"Submit Project Request\" class=\"wp-image-1733\" style=\"border-style:none;border-width:0px\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/Anfrage.webp 400w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-b7585b453aea54c5e3aee3cc5827ed24 wp-block-paragraph\" style=\"font-size:16px\"><br>Project-specific design of AC connection boxes for grid connection, feed-in points, and storage solutions.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-container-core-buttons-is-layout-00436373 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-primary q3-card-link\"><a class=\"wp-block-button__link has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/products\/project-inquiry\/project-inquiry-ac-box-configuration-for-your-pv-project\/\">Start AC Connection Box Project Request \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top animated fadeIn q3-product-card has-large-font-size is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20)\">\n<div class=\"wp-block-cover aligncenter has-custom-content-position is-position-bottom-center\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"400\" class=\"wp-block-cover__image-background wp-image-1732 size-full\" alt=\"PDF\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF.webp 400w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF-150x150.webp 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-link-color-background-color has-background-dim-80 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-0255ba1e wp-block-cover-is-layout-constrained\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-cd7e0037c6c6015f856711aeabadab9c\" id=\"technische-unterlagen-ac-box\" style=\"font-size:20px\">Technical Documentation AC Boxes<\/h2>\n\n\n<div class=\"wp-block-image wp-duotone-unset-2\">\n<figure class=\"aligncenter size-thumbnail has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF-150x150.webp\" alt=\"Visit our download area!\" class=\"wp-image-1732\" style=\"border-style:none;border-width:0px\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF-150x150.webp 150w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF-300x300.webp 300w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/PDF.webp 400w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/figure>\n<\/div>\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-0dbef652e225dfdc580d7cc9dcb0b72d wp-block-paragraph\" style=\"font-size:16px\"><br>Data sheets, circuit diagrams, certificates, and technical documentation for AC distribution and transfer points.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-container-core-buttons-is-layout-00436373 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-primary q3-card-link\"><a class=\"wp-block-button__link has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/downloads\/ac-connection-box-datasheets-and-technical-documentation\/\">AC Box Technical Downloads \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top animated fadeIn q3-product-card has-large-font-size is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20)\">\n<div class=\"wp-block-cover aligncenter has-custom-content-position is-position-bottom-center\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"751\" height=\"501\" class=\"wp-block-cover__image-background wp-image-2139 size-full\" alt=\"AC Anschlusstechnik\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik.webp\" style=\"object-position:48% 58%\" data-object-fit=\"cover\" data-object-position=\"48% 58%\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik.webp 751w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik-300x200.webp 300w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-link-color-background-color has-background-dim-80 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-0255ba1e wp-block-cover-is-layout-constrained\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-147080d36a6b0ec7e2cada4523fa2423\" id=\"q-3-ac-anschlussboxen\" style=\"font-size:20px\">Q3 AC-<br>Anschlussboxen<\/h2>\n\n\n<div class=\"wp-block-image wp-duotone-unset-3\">\n<figure class=\"aligncenter size-thumbnail has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik-150x150.webp\" alt=\"AC Connection Technology\" class=\"wp-image-2139\" style=\"border-style:none;border-width:0px\" title=\"\"><\/figure>\n<\/div>\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-a9425e981ca11dbc7c2118737941cdf7 wp-block-paragraph\" style=\"font-size:16px\"><br>Overview of standardized and customized AC boxes for various grid types and power ranges.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-container-core-buttons-is-layout-00436373 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-primary q3-card-link\"><a class=\"wp-block-button__link has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/products\/ac-box-for-pv-systems-up-to-630-a\/\">To AC Products \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-vertically-aligned-top animated fadeIn q3-product-card has-large-font-size is-layout-flow wp-block-column-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:var(--wp--preset--spacing--20);padding-bottom:var(--wp--preset--spacing--20);padding-left:var(--wp--preset--spacing--20)\">\n<div class=\"wp-block-cover aligncenter has-custom-content-position is-position-bottom-center\" style=\"border-top-left-radius:8px;border-top-right-radius:8px;border-bottom-left-radius:8px;border-bottom-right-radius:8px;padding-top:0;padding-right:var(--wp--preset--spacing--50);padding-bottom:0;padding-left:var(--wp--preset--spacing--50)\"><img loading=\"lazy\" decoding=\"async\" width=\"751\" height=\"501\" class=\"wp-block-cover__image-background wp-image-2139 size-full\" alt=\"AC Anschlusstechnik\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik.webp\" data-object-fit=\"cover\" title=\"\" srcset=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik.webp 751w, https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik-300x200.webp 300w\" sizes=\"auto, (max-width: 751px) 100vw, 751px\" \/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-neve-link-color-background-color has-background-dim-80 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-container-core-cover-is-layout-0255ba1e wp-block-cover-is-layout-constrained\">\n<div style=\"height:10px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h2 class=\"wp-block-heading has-text-align-center has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-177f1df951567fafee9d4bef098ca681\" id=\"q-3-surge-box-tn-s-compact\" style=\"font-size:20px\">Q3 SurgeBox<br>TN-S Compact<\/h2>\n\n\n<div class=\"wp-block-image wp-duotone-unset-4\">\n<figure class=\"aligncenter size-thumbnail has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/q3-energie.de\/wp-content\/uploads\/2026\/02\/AC-Anschlusstechnik-150x150.webp\" alt=\"AC Connection Technology\" class=\"wp-image-2139\" style=\"border-style:none;border-width:0px\" title=\"\"><\/figure>\n<\/div>\n\n\n<p class=\"has-nv-text-dark-bg-color has-text-color has-link-color wp-elements-0be1877d29c3fdbe42fcd82c5b0b7762 wp-block-paragraph\" style=\"font-size:16px\"><br>Compact Type 1+2+3 surge protection box for TN-S networks \u2013 ready to connect.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-container-core-buttons-is-layout-00436373 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button has-custom-width wp-block-button__width-100 is-style-primary q3-card-link\"><a class=\"wp-block-button__link has-medium-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/q3-energie.de\/en\/products\/surge-protection-box-tn-s\/\">Discover Q3 DC Connection Technology \u2192<\/a><\/div>\n<\/div>\n<\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>What Is an AC Connection Box? An AC Connection Box forms the defined interface between the inverter and the low-voltage grid or building installation. It combines protection, switching, and distribution functions in a standards-compliant switchgear assembly according to EN 61439. In contrast to DC connection technology on the generator side, the AC box handles the&hellip;&nbsp;<\/p>\n","protected":false},"author":1,"featured_media":7421,"parent":7465,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","neve_meta_reading_time":"","_themeisle_gutenberg_block_has_review":false,"footnotes":""},"class_list":["post-7448","page","type-page","status-publish","has-post-thumbnail","hentry"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/comments?post=7448"}],"version-history":[{"count":18,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7448\/revisions"}],"predecessor-version":[{"id":9633,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7448\/revisions\/9633"}],"up":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/pages\/7465"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/media\/7421"}],"wp:attachment":[{"href":"https:\/\/q3-energie.de\/en\/wp-json\/wp\/v2\/media?parent=7448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}