{"id":20540,"date":"2026-11-01T10:42:57","date_gmt":"2026-11-01T02:42:57","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/"},"modified":"2026-11-01T10:42:57","modified_gmt":"2026-11-01T02:42:57","slug":"whpu1000-inverter-neutral-earth-rcd-modes","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/","title":{"rendered":"Inverter Neutral-Earth and RCD Checks: Record Every Operating Mode"},"content":{"rendered":"<div class=\"weho-blog-content\">\n<p><strong>Verify the neutral\/earth arrangement and protective-device requirements separately for every permitted inverter operating mode.<\/strong> Do not add a neutral-to-earth link or assume one exists because the unit produces a pure sine wave.<\/p>\n<p>For an equipment integrator considering the <a href=\"https:\/\/www.wehopower.com\/ru\/product\/whpu-1000-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-1000 inverter\/charger family<\/a>, the next decision is whether the exact unit and installation documents establish a complete protection scheme. The public product table reviewed here does not define its internal neutral\/earth bond, switched-neutral arrangement or a transfer topology.<\/p>\n<nav class=\"toc\" aria-label=\"Article contents\">\n<p>In this article<\/p>\n<ol>\n<li><a href=\"#identity\">Identify the exact unit before drawing a protection scheme<\/a><\/li>\n<li><a href=\"#mode-map\">List operating modes and transitions explicitly<\/a><\/li>\n<li><a href=\"#rcd\">Specify RCD evidence for the complete circuit<\/a><\/li>\n<li><a href=\"#example\">A mains-fed check does not cover battery operation<\/a><\/li>\n<li><a href=\"#transition\">Include transitions, accessories and alternate sources<\/a><\/li>\n<li><a href=\"#release\">Hand over a mode-specific protection record<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"identity\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u041e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u0435<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u041f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0430\u0442\u044c<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Identify_the_exact_unit_before_drawing_a_protection_scheme\" >Identify the exact unit before drawing a protection scheme<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#List_operating_modes_and_transitions_explicitly\" >List operating modes and transitions explicitly<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Specify_RCD_evidence_for_the_complete_circuit\" >Specify RCD evidence for the complete circuit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#A_mains-fed_check_does_not_cover_battery_operation\" >A mains-fed check does not cover battery operation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Include_transitions_accessories_and_alternate_sources\" >Include transitions, accessories and alternate sources<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Hand_over_a_mode-specific_protection_record\" >Hand over a mode-specific protection record<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Use_the_project_record\" >Use the project record<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Request_the_earthing_and_mode_information_for_your_unit\" >Request the earthing and mode information for your unit<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/ru\/news\/whpu1000-inverter-neutral-earth-rcd-modes\/#Sources_and_further_reading\" >Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Identify_the_exact_unit_before_drawing_a_protection_scheme\"><\/span>Identify the exact unit before drawing a protection scheme<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Record the ordered DC input variant, AC output voltage\/frequency, socket arrangement and revision. The WHPU-1000 page lists 12 V and 24 V input variants and several AC output options. A photograph showing the family is not enough to establish which internal arrangement is supplied.<\/p>\n<p>Request the controlled installation manual, terminal identification, chassis\/PE requirements and an explanation of the neutral arrangement in every supported mode. If AC charging and AC feed-through are both proposed, confirm which functions the exact product actually provides and how they interact. A charger function alone does not prove an automatic bypass or transfer switch.<\/p>\n<p>The installation designer must determine the applicable local protective arrangement. Keep that design decision separate from the marketing waveform description.<\/p>\n<\/section>\n<section id=\"mode-map\">\n<h2><span class=\"ez-toc-section\" id=\"List_operating_modes_and_transitions_explicitly\"><\/span>List operating modes and transitions explicitly<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"https:\/\/www.victronenergy.com\/media\/pg\/The_Wiring_Unlimited_book\/en\/ground%2C-earth-and-electrical-safety.html\" target=\"_blank\" rel=\"noopener\">Victron\u2019s explanation of inverter\/charger earthing<\/a> illustrates why modes matter: its documented equipment can change internal connections when it changes between inverting and source-fed operation. That is a manufacturer-specific example of the documentation needed. It is not evidence that WHPU-1000 uses the same relay, bonding logic or AC\/DC isolation construction.<\/p>\n<div class=\"table-wrap\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Proposed state<\/th>\n<th scope=\"col\">Confirm with the exact unit documents<\/th>\n<th scope=\"col\">Record for the installation<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Battery inverting<\/th>\n<td>Output conductor identification, chassis connection and permitted neutral\/earth arrangement.<\/td>\n<td>Source identity and the specified protection path for this state.<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">AC charging<\/th>\n<td>Whether the AC input also energizes an output, and under what conditions.<\/td>\n<td>Which circuits remain live and which protection arrangement applies.<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Feed-through or bypass, if provided<\/th>\n<td>Connected\/switched conductors and source requirements.<\/td>\n<td>Upstream\/downstream relationships and permitted configuration.<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Source loss and restoration<\/th>\n<td>Supported transition behavior and switching sequence.<\/td>\n<td>Any intermediate states that the design must address.<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Off\/service state<\/th>\n<td>Isolation provisions and remaining energized circuits.<\/td>\n<td>Applicable isolation and verification procedure.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<figure class=\"figure\" id=\"figure-diagram\"><picture><source media=\"(max-width: 600px)\" srcset=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/decision-map-mobile-9.svg\" width=\"480\" height=\"1070\" type=\"image\/svg+xml\"><img loading=\"lazy\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/decision-map-9.svg\" alt=\"Inverter Neutral-Earth and RCD Checks: Record Every Operating Mode  title=\" width=\"1200\" height=\"740\" decoding=\"async\" inverter neutral-earth and rcd checks: record every operating mode title =\"\"><\/picture><figcaption>Document earthing and protection for every inverter mode. Decision sequence. No wiring diagram, dimensions, test results or product approval. <a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/decision-map-9.svg\">View original image<\/a><\/figcaption><\/figure>\n<\/section>\n<section id=\"rcd\">\n<h2><span class=\"ez-toc-section\" id=\"Specify_RCD_evidence_for_the_complete_circuit\"><\/span>Specify RCD evidence for the complete circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A residual-current device detects an imbalance in the conductors it monitors. Its type, location and performance must be appropriate to the actual source and connected equipment. Obtain the inverter manufacturer\u2019s requirements and the installation designer\u2019s protection assessment rather than selecting a device solely by its rated current.<\/p>\n<p>Separate the RCD\u2019s own functional test from verification of the installed protective arrangement. The <a href=\"https:\/\/electrical.theiet.org\/bs-7671-18th-edition-wiring-regulations\/faqs\/webinar-questions-and-answers\/rcds-selection-types-and-testing-webinar\/\" target=\"_blank\" rel=\"noopener\">IET\u2019s RCD testing explanation<\/a> describes a test-button circuit that creates an internal imbalance without sending test current to earth. A successful button operation cannot, by itself, establish the installation\u2019s PE continuity or the intended fault path in another source mode.<\/p>\n<p>Have qualified personnel establish the required installation tests and acceptance criteria under the applicable instructions. This guide does not prescribe a bond location, RCD type or test connection for WHPU-1000. Those decisions require the missing exact-unit and system information.<\/p>\n<\/section>\n<section id=\"example\">\n<h2><span class=\"ez-toc-section\" id=\"A_mains-fed_check_does_not_cover_battery_operation\"><\/span>A mains-fed check does not cover battery operation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>Illustrative handoff gap:<\/strong> a project file contains a successful RCD button check while an AC source is available. It also contains a WHPU-1000 product page stating pure-sine-wave output. The file has no documented neutral arrangement for battery inverting and no evaluation of that mode\u2019s protective scheme.<\/p>\n<p>Keep the AC-source check as evidence for what was actually checked. Add a separate request for the inverter-mode connection information and a corresponding installation verification plan. Do not mark battery operation accepted by analogy, and do not install an improvised bond to make an informal test behave as expected.<\/p>\n<p>If the product instructions do not support the required installation, reconsider the equipment or overall design. An undefined protection arrangement is a specific design gap; it is not resolved by a larger inverter wattage or a different waveform label.<\/p>\n<\/section>\n<section id=\"transition\">\n<h2><span class=\"ez-toc-section\" id=\"Include_transitions_accessories_and_alternate_sources\"><\/span>Include transitions, accessories and alternate sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A mode table is incomplete if it covers only the stable endpoints. Identify every permitted source change, external transfer device and alternate AC source. Ask which conductors are switched, which remain connected and whether the approved protection arrangement changes during the transition.<\/p>\n<p>Keep protective earth, AC neutral and DC negative separately identified in the documents. Do not assume that the DC negative may be bonded to chassis because another inverter manual allows it. The exact isolation construction and system requirements must support any such connection.<\/p>\n<p>Review extensions, distribution boards and auxiliary loads as part of the intended configuration. They can change the circuit being protected even when the inverter itself is unchanged. Retain their identities and the applicable connection requirements in the final record.<\/p>\n<\/section>\n<section id=\"release\">\n<h2><span class=\"ez-toc-section\" id=\"Hand_over_a_mode-specific_protection_record\"><\/span>Hand over a mode-specific protection record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Use the <a href=\"\/ru\/acceptance-record.html\/\">blank inverter neutral\/earth and RCD mode record<\/a> to organize manufacturer answers, the designer\u2019s decisions and the actual verification results. Mark a mode supported only when its documentation and required evaluation are complete. A proposed but unsupported mode should remain outside the released operating instructions.<\/p>\n<p>Tie the record to the inverter revision, external switching equipment, protection devices and allowed sources. Reassess affected states after a change. For WHPU-1000, this article provides a disciplined request and review method; it does not claim an internal bond, transfer arrangement or completed installation approval.<\/p>\n<\/section>\n<section id=\"project-record\">\n<h2><span class=\"ez-toc-section\" id=\"Use_the_project_record\"><\/span>Use the project record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><a href=\"\/ru\/acceptance-record.html\/\">Open the blank Inverter neutral\/earth and RCD operating-mode record<\/a> to record your conditions, evidence and decisions. The worksheet contains no pre-approved result.<\/p>\n<\/section>\n<section class=\"cta\" id=\"project-review\">\n<h2><span class=\"ez-toc-section\" id=\"Request_the_earthing_and_mode_information_for_your_unit\"><\/span>Request the earthing and mode information for your unit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Send WEHO the exact WHPU-1000 configuration, destination requirements, proposed AC\/DC sources, external switching equipment and intended operating modes. Request the installation manual and mode-specific neutral, chassis, protective-earth and RCD requirements before finalizing the system.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/ru\/contact\/\">Discuss the inverter installation evidence<\/a><\/p>\n<\/section>\n<section class=\"sources\" id=\"sources\">\n<h2><span class=\"ez-toc-section\" id=\"Sources_and_further_reading\"><\/span>Sources and further reading<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li><a href=\"https:\/\/www.wehopower.com\/ru\/product\/whpu-1000-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-1000 product information<\/a><\/li>\n<li><a href=\"https:\/\/www.victronenergy.com\/media\/pg\/The_Wiring_Unlimited_book\/en\/ground%2C-earth-and-electrical-safety.html\" target=\"_blank\" rel=\"noopener\">Victron Energy \u2014 Wiring Unlimited, earthing and inverter\/charger operating modes<\/a><\/li>\n<li><a href=\"https:\/\/electrical.theiet.org\/bs-7671-18th-edition-wiring-regulations\/faqs\/webinar-questions-and-answers\/rcds-selection-types-and-testing-webinar\/\" target=\"_blank\" rel=\"noopener\">IET \u2014 RCDs: selection, types and testing, webinar questions and answers<\/a><\/li>\n<\/ol>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>A pure-sine-wave rating does not define neutral-to-earth bonding, switched conductors or the protection arrangement in each inverter mode.<\/p>","protected":false},"author":2,"featured_media":20529,"parent":0,"menu_order":0,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20540","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/news\/20540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/comments?post=20540"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/news\/20540\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/media\/20529"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/media?parent=20540"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/ru\/wp-json\/wp\/v2\/news_category?post=20540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}