{"id":2371,"date":"2026-07-30T11:28:49","date_gmt":"2026-07-30T03:28:49","guid":{"rendered":"https:\/\/eqsvq3fzct.wpdns.site\/product\/wlm6ly-250a-4300-4p-wlm6l-series-earth-leakage-protection-type-residual-current-circuit-breaker-400v\/"},"modified":"2026-10-17T09:25:45","modified_gmt":"2026-10-17T01:25:45","slug":"wlm6ly-250a-4300-4p-wlm6l-series-earth-leakage-protection-type-residual-current-circuit-breaker-400v","status":"publish","type":"product","link":"https:\/\/w9-group.com\/ja\/product\/wlm6ly-250a-4300-4p-wlm6l-series-earth-leakage-protection-type-residual-current-circuit-breaker-400v\/","title":{"rendered":"WLM6LY-250 earth leakage MCCB"},"content":{"rendered":"<div class=\"ksion-pdp--w9-wlm6ly-250-2371\">\n<nav class=\"ksion-pdp__jump\" aria-label=\"Product page sections\">\n    <a href=\"#specifications\">Specifications<\/a><a href=\"#selection\">Selection<\/a><a href=\"#evidence\">W9 Group<\/a><a href=\"#resources\">Resources<\/a><a href=\"#faq\">FAQ<\/a><a class=\"ksion-pdp__jump-cta\" href=\"#product-enquiry\">Request a quote<\/a><br \/>\n  <\/nav>\n<section class=\"ksion-pdp__section\" id=\"specifications\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">TECHNICAL DATA<\/p>\n<h2>WLM6LY-250 Earth Leakage MCCB Specifications<\/h2>\n<p>The WLM6LY-250 earth leakage MCCB is listed by W9 Group with a 250 A summary rating and 3P \/ 4P options. Its table identifies a thermal overcurrent release and an electronic leakage release. Specify the required residual-current response, pole arrangement and fault duty for the exact supplied version.<\/p>\n<\/div>\n<div class=\"ksion-pdp__table-wrap\">\n<table class=\"ksion-pdp__spec-table\">\n<caption>WLM6LY-250 product specifications<\/caption>\n<tbody>\n<tr>\n<th scope=\"row\">Model<\/th>\n<td>WLM6LY-250<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Product category<\/th>\n<td>Earth leakage molded case circuit breaker<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Summary rated current<\/th>\n<td>250 A<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Catalog current choices<\/th>\n<td>100, 125, 140, 150, 160, 175, 180, 200, 225, 250 A<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Summary pole options<\/th>\n<td>3P \/ 4P; confirm the complete order code<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Voltage selection<\/th>\n<td>400 V AC appears in the summary and table; confirm voltage for the selected configuration<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Overcurrent release listed<\/th>\n<td>Thermal<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Leakage release listed<\/th>\n<td>Electronic<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Residual-current type listed<\/th>\n<td>AC; confirm suitability for the expected waveform<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Insulation voltage Ui<\/th>\n<td>1000 V<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Impulse withstand voltage Uimp<\/th>\n<td>8 kV<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Leakage alarm without tripping<\/th>\n<td>Shown as an option; confirm availability and intended alarm \/ trip mode<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Standard listed<\/th>\n<td>IEC \/ EN 60947-2; request applicable model documents<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"ksion-pdp__section ksion-pdp__section--tint\" id=\"selection\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">SELECTION GUIDE<\/p>\n<h2>Selecting a 250A Earth Leakage MCCB by Sensitivity and Poles<\/h2>\n<p>Specify the selected current, poles, leakage sensitivity and delay, waveform requirement, voltage, fault duty and alarm mode when requesting a WLM6LY-250 quotation from W9 Group.<\/p>\n<\/div>\n<div class=\"ksion-pdp__selection-grid\">\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">01<\/span><\/p>\n<h3>Choose the ordered current<\/h3>\n<p>The 250 A page lists 100, 125, 140, 150, 160, 175, 180, 200, 225, 250 A. Confirm the selected current and full model suffix, including the pole arrangement.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">02<\/span><\/p>\n<h3>Specify leakage protection<\/h3>\n<p>Provide the required sensitivity, waveform response and delay. Confirm the actual available settings; residual-current making capacity is not the sensitivity setting.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">03<\/span><\/p>\n<h3>Check voltage and fault duty<\/h3>\n<p>Use the selected configuration\u2019s operational-voltage and breaking-capacity data. Confirm the capacity code and do not substitute insulation voltage for operating voltage.<\/p>\n<\/article>\n<article class=\"ksion-pdp__selection-card\"><span class=\"ksion-pdp__card-index\">04<\/span><\/p>\n<h3>Define alarm, mounting and wiring<\/h3>\n<p>Confirm tripping versus alarm-only behavior, mounting form, neutral routing and the connection drawing. Request the required test and commissioning instructions.<\/p>\n<\/article>\n<\/div>\n<div class=\"ksion-pdp__application-note\"><strong>Before specifying WLM6LY-250:<\/strong> Confirm current, poles, residual-current sensitivity and delay, alarm \/ trip mode, operating voltage and voltage-specific fault ratings. The source mixes generic RCCB prose and configuration data; do not treat the prose as a complete order specification.<\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"evidence\">\n<div class=\"ksion-pdp__evidence-grid\">\n<div class=\"ksion-pdp__evidence-copy\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">ABOUT W9 GROUP<\/p>\n<h2>W9 Group 250A Earth Leakage MCCB Supply and Support<\/h2>\n<\/p><\/div>\n<p>Zhejiang W9 Group Technology Co., Ltd. supplies low-voltage electrical products. For a WLM6LY-250 enquiry, contact W9 Group about configuration and matching product documents.<\/p>\n<div class=\"ksion-pdp__evidence-links\">\n          <a href=\"https:\/\/w9-group.com\/about-us\/\"><span>01<\/span><strong>About W9 Group<\/strong><em>Company profile and low-voltage product range<\/em><\/a><br \/>\n          <a href=\"https:\/\/w9-group.com\/oem-odm\/\"><span>02<\/span><strong>W9 Group OEM \/ ODM<\/strong><em>Ask about branding and configuration for your WLM6LY-250 order<\/em><\/a><br \/>\n          <a href=\"https:\/\/w9-group.com\/technical-support\/\"><span>03<\/span><strong>Technical support<\/strong><em>Request model-specific selection and installation documents<\/em><\/a>\n        <\/div>\n<\/p><\/div>\n<figure class=\"ksion-pdp__evidence-media\">\n        <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/w9-group.com\/wp-content\/uploads\/2026\/07\/oem-circuit-protection-devices.webp\" alt=\"W9 Group OEM and ODM circuit protection product scope\" width=\"1000\" height=\"669\"><figcaption>W9 Group circuit-protection range \u2014 category illustration.<\/figcaption><\/figure>\n<\/p><\/div>\n<\/section>\n<section class=\"ksion-pdp__section ksion-pdp__section--tint\" id=\"resources\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">RELATED RESOURCES<\/p>\n<h2>WLM6LY-250 Residual-Current MCCB Datasheet and Wiring Requests<\/h2>\n<p>Use technical support and related products to specify WLM6LY-250. Request a datasheet and wiring diagram matching the selected WLM6LY-250 configuration.<\/p>\n<\/div>\n<div class=\"ksion-pdp__resource-list\">\n      <a href=\"https:\/\/w9-group.com\/technical-support\/\"><span>TECHNICAL SUPPORT<\/span><strong>Selection and product documentation<\/strong><em>Request the datasheet and wiring drawing for the offered configuration<\/em><\/a><br \/>\n      <a href=\"https:\/\/w9-group.com\/product\/wlm6ly-250a-4300-4p-wlm6l-series-earth-leakage-protection-type-residual-current-circuit-breaker-400v-1\/\"><span>RELATED PRODUCT<\/span><strong>WLM6LY-400<\/strong><em>Compare function and configuration; request separate model ratings<\/em><\/a><br \/>\n      <a href=\"https:\/\/w9-group.com\/download\/\"><span>DOCUMENTS<\/span><strong>W9 Group download centre<\/strong><em>Request the current document for your quoted WLM6LY-250 variant<\/em><\/a>\n    <\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"faq\">\n<div class=\"ksion-pdp__section-heading\">\n<p class=\"ksion-pdp__eyebrow\">BUYER FAQ<\/p>\n<h2>WLM6LY-250 Earth Leakage MCCB FAQs: Sensitivity, Alarm and Fault Duty<\/h2>\n<p>Find answers about WLM6LY-250 selection, configuration and ordering.<\/p>\n<\/div>\n<div class=\"ksion-pdp__faq-list\">\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Which current choices are listed for WLM6LY-250?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">The summary identifies 250 A. The frame schedule lists 100, 125, 140, 150, 160, 175, 180, 200, 225, 250 A. Confirm the selected current and complete order code; the schedule is not a guaranteed adjustment range.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Is this an RCCB without overcurrent protection?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">The target table describes a molded-case device with overcurrent and leakage releases. Confirm the complete protection functions in the matching datasheet; generic RCCB text is insufficient to classify the ordered unit.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">What leakage sensitivity can I order?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">A definitive sensitivity schedule is not established by the available page. State your required residual-current pickup and delay, then confirm the available combination with W9 Group.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Does the listed residual-current type cover every waveform?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">The table lists AC residual-current response. Confirm the expected leakage waveform and required device type; do not assume support for other waveforms from the electronic release description.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">Can the breaker signal leakage without tripping?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">A leakage-alarm non-tripping function is marked as an option. Confirm whether it is available, which mode is supplied and how the alarm is wired for the exact order code.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">How should I select voltage and breaking capacity?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">Request the operational-voltage and Icu \/ Ics data for the pole arrangement and capacity code. Confirm discrepancies between the summary and table before installation; no universal fault rating is assigned here.<\/p>\n<\/details>\n<details class=\"ksion-pdp__faq-item\">\n<summary class=\"ksion-pdp__faq-question\">What is needed for a WLM6LY-250 quotation?<\/summary>\n<p class=\"ksion-pdp__faq-answer\">Send the required configuration, quantity, destination market and document requirements. Ask W9 Group to confirm price, minimum order quantity, samples and lead time for the selected configuration.<\/p>\n<\/details>\n<\/div>\n<\/section>\n<section class=\"ksion-pdp__section\" id=\"product-enquiry\">\n<div class=\"ksion-pdp__enquiry\">\n<div class=\"ksion-pdp__enquiry-copy\">\n<p class=\"ksion-pdp__eyebrow\">PRODUCT ENQUIRY<\/p>\n<h2>Request a WLM6LY-250 Earth Leakage MCCB Quotation<\/h2>\n<p>Tell W9 Group your selected current, poles, leakage sensitivity and delay, waveform requirement, voltage, fault duty and alarm mode, quantity and destination market so the selected configuration can be identified.<\/p>\n<\/div>\n<p><a class=\"ksion-pdp__button ksion-pdp__button--primary\" href=\"https:\/\/w9-group.com\/contact-us\/\">Contact W9 Group<\/a><\/div>\n<\/section>\n<\/div>\n<style 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