{"id":20867,"date":"2026-11-05T10:07:30","date_gmt":"2026-11-05T02:07:30","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/inverter-output-gap-load-hold-up-record\/"},"modified":"2026-11-05T10:07:30","modified_gmt":"2026-11-05T02:07:30","slug":"inverter-output-gap-load-hold-up-record","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/ar\/news\/inverter-output-gap-load-hold-up-record\/","title":{"rendered":"Inverter Output Interruptions: Compare the Gap with Load Hold-Up"},"content":{"rendered":"<figure class=\"hero\"><a href=\"https:\/\/www.wehopower.com\/ar\/product\/whpu-2500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/hero-17.webp\" alt=\"Inverter Output Interruptions: Compare the Gap with Load Hold-Up  title=\" fetchpriority=\"high\" inverter output interruptions: compare the gap with load hold-up title=\"\"><\/a><figcaption>Receiver-gap observation layout: the protected receiver AC-input path and a separate receiver-status channel feed the recorder. Screens are blank; the external event module illustrates a test setup, without asserting an internal transfer mechanism or measured hold-up result. AI-assisted illustration.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-10.jpg\">View original product image<\/a><\/figure>\n<p><strong>Compare the interruption at the receiver\u2019s AC input with that receiver\u2019s documented or verified hold-up behavior.<\/strong> A nominal transfer-time claim and a successful lamp demonstration cannot establish whether a controller, computer or process will remain operating.<\/p>\n<p>This guide helps an integrator evaluate allowed states involving the <a href=\"https:\/\/www.wehopower.com\/ar\/product\/whpu-2500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-2500 inverter\/charger family<\/a>. It does not claim the product has an automatic transfer relay, bypass path or UPS classification.<\/p>\n<nav class=\"toc\" aria-label=\"On this page\">\n<ol>\n<li><a href=\"#define-supported-states\">Establish which state transitions the system actually permits<\/a><\/li>\n<li><a href=\"#choose-observation\">Choose a receiver-relevant interruption definition<\/a><\/li>\n<li><a href=\"#load-hold-up\">Define the load\u2019s behavior, not only its power rating<\/a><\/li>\n<li><a href=\"#timing-example\">Compare timing on the same basis<\/a><\/li>\n<li><a href=\"#release-continuity\">Release the covered continuity result<\/a><\/li>\n<\/ol>\n<\/nav>\n<section id=\"define-supported-states\">\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\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/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;\">\u062a\u0628\u062f\u064a\u0644<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Establish_which_state_transitions_the_system_actually_permits\" >Establish which state transitions the system actually permits<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Choose_a_receiver-relevant_interruption_definition\" >Choose a receiver-relevant interruption definition<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Define_the_loads_behavior_not_only_its_power_rating\" >Define the load\u2019s behavior, not only its power rating<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Compare_timing_on_the_same_basis\" >Compare timing on the same basis<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Release_the_covered_continuity_result\" >Release the covered continuity result<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Specify_the_continuity_requirement\" >Specify the continuity requirement<\/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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Output-gap_and_receiver-continuity_record\" >Output-gap and receiver-continuity 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\/ar\/news\/inverter-output-gap-load-hold-up-record\/#Sources_and_further_reading\" >Sources and further reading<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Establish_which_state_transitions_the_system_actually_permits\"><\/span>Establish which state transitions the system actually permits<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Obtain the exact unit\u2019s operating-state description before planning a source-loss test. A charging input may have a different relationship to the output from the one an installer expects. If switching is external, identify that equipment and its controlled sequence separately.<\/p>\n<p>Choose only manufacturer-supported transitions for the assembled system. Define normal conditions, source loss and restoration, and the relevant receiver operating state. Keep neutral\/earth and protective-device design in its own competent review; this article concerns output timing and receiver continuity.<\/p>\n<p>The WHPU-2500 page identifies a pure-sine inverter\/charger and several DC\/AC options. It does not provide a complete output-interruption specification that can approve a particular receiver.<\/p>\n<figure id=\"fig-original\" class=\"product-original\"><a href=\"https:\/\/www.wehopower.com\/ar\/product\/whpu-2500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-10.jpg\" alt=\"Inverter Output Interruptions: Compare the Gap with Load Hold-Up  title=\" loading=\"lazy\" inverter output interruptions: compare the gap with load hold-up title=\"\"><\/a><figcaption>Official WHPU-2500 family product photograph. The pictured markings are retained; the image does not identify every available input or AC output option.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/original-10.jpg\">View original image<\/a><\/figure>\n<\/section>\n<section id=\"choose-observation\">\n<h2><span class=\"ez-toc-section\" id=\"Choose_a_receiver-relevant_interruption_definition\"><\/span>Choose a receiver-relevant interruption definition<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Write down what counts as lost supply for the receiver: a specified input envelope, a defined measurement method, or the applicable manufacturer test criterion. An AC waveform normally crosses zero, so one arbitrary instantaneous voltage threshold can confuse normal zero crossings with an interruption.<\/p>\n<p><a href=\"https:\/\/www.se.com\/au\/en\/faqs\/FA276173\/\" target=\"_blank\" rel=\"noopener\">Schneider Electric\u2019s ATS timing explanation<\/a> illustrates that the chosen measurement points and definition affect a switching-time result. Its equipment-specific timing numbers do not define WHPU behavior.<\/p>\n<p>Record the first and last samples or events used for the interval and retain the waveform. If a report gives only \u201c12 ms transfer,\u201d ask what began and ended that interval and under which load\/source conditions.<\/p>\n<\/section>\n<section id=\"load-hold-up\">\n<h2><span class=\"ez-toc-section\" id=\"Define_the_loads_behavior_not_only_its_power_rating\"><\/span>Define the load\u2019s behavior, not only its power rating<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Obtain the receiver\u2019s applicable interruption or hold-up information at the intended input and load. A receiver\u2019s internal output may remain active after its AC input is lost; the duration can vary with load and pre-event conditions.<\/p>\n<p>If the requirement is uninterrupted process operation, record the process consequence too. A display that remains lit may coexist with a controller reset, communications loss or data corruption. Identify the actual release criterion, such as no reset and completion of a defined transaction.<\/p>\n<p>Do not transfer a hold-up value from a different receiver, input condition or hardware revision. If no relevant specification exists, use an agreed qualification method instead of filling the gap with a typical number.<\/p>\n<figure id=\"fig-diagram\" class=\"diagram\"><img decoding=\"async\" class=\"technical-desktop\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-17.svg\" alt=\"Inverter Output Interruptions: Compare the Gap with Load Hold-Up  title=\" loading=\"lazy\" inverter output interruptions: compare the gap with load hold-up title=\"\"><img decoding=\"async\" class=\"technical-mobile\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-mobile-17.svg\" alt=\"Inverter Output Interruptions: Compare the Gap with Load Hold-Up  title=\" loading=\"lazy\" inverter output interruptions: compare the gap with load hold-up title=\"\"><figcaption>Continuity evaluation concept; no WHPU transfer topology, UPS classification or measured timing is implied.<\/figcaption><a class=\"original-link\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/diagram-17.svg\">Open full-size technical illustration<\/a><\/figure>\n<\/section>\n<section id=\"timing-example\">\n<h2><span class=\"ez-toc-section\" id=\"Compare_timing_on_the_same_basis\"><\/span>Compare timing on the same basis<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Consider an illustrative case with a defined 18 ms output interruption and a receiver validated to tolerate 12 ms under matching conditions. The gap exceeds the validated interval by 6 ms, so this evidence cannot approve continuity. If a later interruption were 8 ms, the 4 ms arithmetic difference would still need the agreed uncertainty and condition coverage.<\/p>\n<p>These are hypothetical timing values. They are not WHPU-2500 measurements or general UPS limits. A shorter observed gap cannot approve untested load states or all possible source restoration events.<\/p>\n<p>Capture the relevant AC behavior and receiver status on a common time basis using suitable, safely connected acquisition equipment. A phone video of a lamp is not a reliable millisecond measurement or a receiver reset log.<\/p>\n<\/section>\n<section id=\"release-continuity\">\n<h2><span class=\"ez-toc-section\" id=\"Release_the_covered_continuity_result\"><\/span>Release the covered continuity result<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Retain exact hardware, source configuration, load state, event, measurement definition, raw data and receiver response. Document the conditions actually covered, including any uncertainty relevant to a close comparison.<\/p>\n<p>If continuity fails, consider a different receiver interface, a documented energy buffer or equipment that supports the required supply behavior. Do not improvise parallel AC connections or assume a larger inverter wattage removes a timing gap.<\/p>\n<p>Repeat affected checks after changing switching equipment, receiver hardware\/firmware, source conditions or the inverter configuration. The result should say which receiver functions survived which defined transition, rather than labeling the whole system\u201cuninterruptible\u201d from one demonstration.<\/p>\n<\/section>\n<section class=\"cta\">\n<h2><span class=\"ez-toc-section\" id=\"Specify_the_continuity_requirement\"><\/span>Specify the continuity requirement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Provide WEHO with the exact WHPU-2500 configuration, documented state transitions, receiver hold-up requirement and timing method. Request the operating information needed before evaluating output continuity.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/ar\/contact\/\">Discuss the receiver interruption requirement<\/a><\/p>\n<\/section>\n<section id=\"worksheet\" class=\"sheet\">\n<h2><span class=\"ez-toc-section\" id=\"Output-gap_and_receiver-continuity_record\"><\/span>Output-gap and receiver-continuity record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"sheet-row\"><label>Unit \/ external switch \/ receiver revisions<input aria-label=\"Unit \/ external switch \/ receiver revisions\"><\/label><label>Supported transition reference<input aria-label=\"Supported transition reference\"><\/label><label>Interruption definition and method<input aria-label=\"Interruption definition and method\"><\/label><label>Receiver requirement and uncertainty<input aria-label=\"Receiver requirement and uncertainty\"><\/label><label>Reviewer \/ date<input aria-label=\"Reviewer \/ date\"><\/label><\/div>\n<div class=\"table-scroll\">\n<table>\n<thead>\n<tr>\n<th scope=\"col\">Event \/ load state<\/th>\n<th scope=\"col\">Output gap and raw trace<\/th>\n<th scope=\"col\">Receiver status \/ process result<\/th>\n<th scope=\"col\">Hold-up basis<\/th>\n<th scope=\"col\">Coverage \/ decision<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<tr>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<td contenteditable=\"true\" aria-label=\"Worksheet cell\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>Blank project worksheet. Enter verified project data; example calculations above are not measurements.<\/p>\n<\/section>\n<section class=\"source-list\">\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\/ar\/product\/whpu-2500-dc-to-ac-pure-sine-wave-power-inverter-with-charger\/\">WEHO WHPU-2500 family product information<\/a><\/li>\n<li><a href=\"https:\/\/www.se.com\/au\/en\/faqs\/FA276173\/\" target=\"_blank\" rel=\"noopener\">Schneider Electric: How to correctly measure the switch time of an ATS<\/a><\/li>\n<\/ol>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Define an output interruption and capture the load response on the same time base. Evaluate WHPU2500 states without assuming UPS classification or bypass.<\/p>","protected":false},"author":2,"featured_media":20848,"parent":0,"menu_order":12,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20867","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\/ar\/wp-json\/wp\/v2\/news\/20867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/comments?post=20867"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news\/20867\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/media\/20848"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/media?parent=20867"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/ar\/wp-json\/wp\/v2\/news_category?post=20867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}