{"id":1154,"date":"2025-11-20T08:19:48","date_gmt":"2025-11-20T08:19:48","guid":{"rendered":"https:\/\/xbrele.com\/?page_id=1154"},"modified":"2026-01-11T03:33:33","modified_gmt":"2026-01-11T03:33:33","slug":"vs1-vacuum-circuit-breaker","status":"publish","type":"page","link":"https:\/\/xbrele.com\/fr\/vacuum-circuit-breaker\/vs1-vacuum-circuit-breaker\/","title":{"rendered":"Disjoncteur \u00e0 vide VS1"},"content":{"rendered":"\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-12435fb\" data-block-id=\"12435fb\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-12435fb-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-8d45a16\" data-v=\"4\" data-block-id=\"8d45a16\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-8d45a16-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-8d45a16-inner-blocks\">\n<section id=\"sec1-vs1-hero\">\n  <style>\n    #sec1-vs1-hero{\n      padding:200px 0 128px;\n      background:#0B1120;\n      color:#E5E7EB;\n    }\n\n    #sec1-vs1-hero .vs1-shell{\n      max-width:1600px;\n      margin:0 auto;\n      padding:0 5vw;\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n      display:grid;\n      grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);\n      gap:40px;\n      align-items:center;\n    }\n\n    @media(max-width:900px){\n      #sec1-vs1-hero{\n        padding:140px 0 96px;\n      }\n      #sec1-vs1-hero .vs1-shell{\n        grid-template-columns:1fr;\n      }\n    }\n\n    @media(max-width:600px){\n      #sec1-vs1-hero{\n        padding:110px 0 72px;\n      }\n    }\n\n    #sec1-vs1-hero .vs1-kicker{\n      text-transform:uppercase;\n      letter-spacing:.16em;\n      font-size:12px;\n      font-weight:600;\n      color:#00B8B8;\n      margin-bottom:10px;\n    }\n\n    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55%, #020617 100%);\n      overflow:hidden;\n      padding:22px 22px 20px;\n    }\n\n    \/* \u5de6\u4e0a\u6807\u7b7e *\/\n    #sec1-vs1-hero .vs1-hero-label{\n      font-size:11px;\n      text-transform:uppercase;\n      letter-spacing:.14em;\n      color:#E5E7EB;\n      opacity:.9;\n      margin-bottom:4px;\n    }\n\n    #sec1-vs1-hero .vs1-hero-text{\n      font-size:13px;\n      color:#C4CFDE;\n      max-width:70%;\n      line-height:1.6;\n    }\n\n    #sec1-vs1-hero .vs1-hero-tag{\n      position:absolute;\n      top:18px;\n      right:18px;\n      padding:4px 12px;\n      border-radius:999px;\n      background:rgba(15,23,42,.8);\n      border:1px solid rgba(148,163,184,.6);\n      font-size:11px;\n      color:#E5E7EB;\n      white-space:nowrap;\n    }\n\n    #sec1-vs1-hero .vs1-hero-note{\n      position:absolute;\n      left:22px;\n      bottom:18px;\n      font-size:12px;\n      color:#9CA3AF;\n      max-width:76%;\n      line-height:1.7;\n    }\n  <\/style>\n\n  <div class=\"vs1-shell\">\n    <div class=\"vs1-copy\">\n      <div class=\"vs1-kicker\">INDOOR VACUUM CIRCUIT BREAKERS<\/div>\n\n      <h1>VS1 &#038; LZND Series: Standard Protection &#038; High-Endurance Solutions<\/h1>\n\n      <p class=\"vs1-sub\">\n        One portfolio covering the full spectrum of indoor medium-voltage switching. \n        Choose the <strong>vs1 vacuum circuit breaker(ZN63)<\/strong> for standard 12kV\u201324kV distribution in KYN28 panels, \n        or upgrade to the <strong>LZND Electric Repulsion VCB<\/strong> for ultra-fast switching and a mechanical life of <strong>300,000 operations<\/strong>.\n      <\/p>\n\n      <p class=\"vs1-meta\">\n        Whether for utility substations or severe-duty industrial applications like mining hoists and electric arc furnaces, XBRELE provides the right breaker technology\u2014spring-operated or electric repulsion\u2014to match your operational needs.\n      <\/p>\n\n      <div class=\"vs1-cta-row\">\n        <a href=\"\/contact\/\" class=\"btn-primary\">Talk to an Engineer<\/a>\n        <a href=\"#sec4-vs1-specs\" class=\"btn-ghost\">Compare Specs<\/a>\n      <\/div>\n    <\/div>\n\n    <div class=\"vs1-hero-media\">\n      <div class=\"vs1-hero-label\">Indoor VCB Snapshot<\/div>\n\n      <div class=\"vs1-hero-text\">\n        Comprehensive 12kV\u201324kV solutions featuring both standard withdrawable trucks and maintenance-free electric repulsion units.\n      <\/div>\n\n      <div class=\"vs1-hero-tag\">VS1 \u00b7 LZND \u00b7 12\/24kV<\/div>\n\n      <div class=\"vs1-hero-note\">\n        Target applications: Utility Feeders (VS1) and Frequent Switching\/Heavy Industry (LZND).\n      <\/div>\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-4522f38\" data-block-id=\"4522f38\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-4522f38-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-5ea70fb\" data-v=\"4\" data-block-id=\"5ea70fb\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-5ea70fb-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-5ea70fb-inner-blocks\">\n<section id=\"sec2-vs1-overview\" style=\"background:#ffffff;padding:90px 0 105px;color:#0f172a;\">\n  <style>\n    #sec2-vs1-overview{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n    }\n    #sec2-vs1-overview .vs1-shell{\n      max-width:1600px;\n      margin:0 auto;\n      padding:0 5vw;\n    }\n    #sec2-vs1-overview .overview-grid{\n      display:grid;\n      grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);\n      gap:52px;\n      align-items:center;\n    }\n    #sec2-vs1-overview .kicker{\n      text-transform:uppercase;\n      letter-spacing:.16em;\n      font-size:12px;\n      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position:absolute;\n      left:0;\n      top:8px;\n      width:6px;\n      height:6px;\n      border-radius:999px;\n      background:#38bdf8;\n    }\n\n    @media(max-width:1000px){\n      #sec2-vs1-overview .overview-grid{\n        grid-template-columns:1fr;\n      }\n    }\n  <\/style>\n\n  <div class=\"vs1-shell\">\n    <div class=\"overview-grid\">\n\n      <div>\n        <div class=\"kicker\">Series overview<\/div>\n        <h2>VS1 &#038; LZND indoor vacuum circuit breakers for metal-clad switchgear<\/h2>\n\n        <p>\n          This series offers a unified platform for indoor medium-voltage protection, covering both standard distribution and severe industrial duty. It includes the industry-standard <strong>VS1 (ZN63)<\/strong> for general applications and the specialized <strong>LZND series<\/strong> for high-frequency switching, ensuring optimal performance in KYN28 and custom panels.\n        <\/p>\n\n        <p>\n          The standard <strong>VS1 models<\/strong> utilize a modular spring operating mechanism to deliver reliable switching for 12kV and 24kV utility networks. They are designed for cost-effective protection of feeders and transformers, with a mechanical life of up to 30,000 operations and short-circuit breaking capacity up to 31.5kA.\n        <\/p>\n\n        <p>\n          For demanding environments, the <strong>LZND models<\/strong> feature an advanced <strong>electric repulsion mechanism<\/strong>. This unique design separates normal closing from fault clearing, achieving an ultra-long life of <strong>300,000 operations<\/strong>. It is the ideal maintenance-free solution for electric arc furnaces, mining hoists, and soft starters where standard breakers fail.\n        <\/p>\n\n        <p style=\"margin-top:14px;font-size:14px;color:#4b5563;\">\n          For a broader view of XBRELE\u2019s vacuum circuit breaker solutions, please visit the\n          <a href=\"\/vacuum-circuit-breaker\/\" style=\"color:#2563EB;text-decoration:none;\">\n            vacuum circuit breaker pillar page\n          <\/a>.\n        <\/p>\n      <\/div>\n\n      <aside class=\"apps-box\">\n        <h3>Typical applications<\/h3>\n        <ul>\n          <li><strong>Utility Distribution:<\/strong> 12kV\/24kV KYN28 metal-clad switchgear<\/li>\n          <li><strong>Industrial Power:<\/strong> Transformer incomer and feeder protection<\/li>\n          <li><strong>Heavy Industry (LZND):<\/strong> Electric arc furnaces &#038; rolling mills<\/li>\n          <li><strong>Mining (LZND):<\/strong> High-frequency switching for hoists &#038; conveyors<\/li>\n          <li><strong>Special Purpose:<\/strong> High-voltage soft starter cabinets &#038; capacitor banks<\/li>\n        <\/ul>\n      <\/aside>\n\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-745ad43\" data-block-id=\"745ad43\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-745ad43-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-1279dfc\" data-v=\"4\" data-block-id=\"1279dfc\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-1279dfc-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-1279dfc-inner-blocks\">\n<section id=\"sec3-vs1-tech\" style=\"padding:90px 0;background:#F9FAFB;\">\n  <style>\n    #sec3-vs1-tech{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe 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color:#6B7280;\n    }\n\n    #sec3-vs1-tech .dim-right{\n      display:flex;\n      flex-direction:column;\n      justify-content:space-between;\n    }\n\n    \/* CTA *\/\n    #sec3-vs1-tech .cta-right-col{\n      display:flex;\n      justify-content:center;\n      margin-top:26px;\n    }\n    #sec3-vs1-tech .cta-btn{\n      display:inline-block;\n      padding:12px 30px;\n      background:#0F172A;\n      color:#F9FAFB;\n      font-size:15px;\n      font-weight:600;\n      border-radius:8px;\n      text-decoration:none;\n      letter-spacing:.03em;\n      transition:all .25s ease;\n      box-shadow:0 10px 24px rgba(15,23,42,.18);\n      white-space:nowrap;\n    }\n    #sec3-vs1-tech .cta-btn:hover{\n      background:#1E293B;\n      box-shadow:0 14px 32px rgba(15,23,42,.25);\n      transform:translateY(-1px);\n    }\n\n    @media(max-width:1000px){\n      #sec3-vs1-tech .panel-grid,\n      #sec3-vs1-tech .dim-block{\n        grid-template-columns:1fr;\n      }\n      #sec3-vs1-tech .cta-right-col{\n        justify-content:flex-start;\n      }\n    }\n    @media(max-width:690px){\n      #sec3-vs1-tech .tech-shell{padding:0 18px;}\n      #sec3-vs1-tech h2{font-size:24px;}\n    }\n  <\/style>\n\n  <div class=\"tech-shell\">\n    <div class=\"sec-header\">\n      <div class=\"kicker\">Technical data &#038; installation dimensions<\/div>\n      <h2>Indoor VCB technical specifications &#038; selection guide<\/h2>\n      <p>\n        Compare the technical parameters and dimensions of our Standard VS1 series and High-Endurance LZND series to select the right breaker for your switchgear.\n      <\/p>\n    <\/div>\n\n    <div class=\"tab-row\">\n      <div class=\"tab-btn active\" data-tab=\"vs1-12\">VS1 Series (Standard)<\/div>\n      <div class=\"tab-btn\" data-tab=\"lznd-12\">LZND Series (High Endurance)<\/div>\n    <\/div>\n\n    <div id=\"vs1-12\" class=\"tab-content active\">\n      <div class=\"panel-card\">\n        <div class=\"panel-grid\">\n          <figure class=\"main-fig\">\n            <img decoding=\"async\" src=\"https:\/\/xbrele.com\/wp-content\/uploads\/2025\/11\/XBR-VS1-Vacuum-circuit-breaker-.webp\"\n                 alt=\"XBRELE VS1-12 indoor vacuum circuit breaker structure showing vacuum interrupter, operating mechanism and insulation layout\">\n            <figcaption>\n              VS1-12 indoor vacuum circuit breaker with compact structure for metal-clad switchgear such as KYN28.\n            <\/figcaption>\n          <\/figure>\n\n          <div class=\"panel-right\">\n            <h3>VS1-12 technical overview<\/h3>\n            <p>\n              VS1-12 is an indoor vacuum circuit breaker with a three-phase AC 50&nbsp;Hz rated voltage of\n              12&nbsp;kV. It is used as the protection and control unit of power grid equipment and power\n              equipment of industrial and mining enterprises, suitable for frequent operation under rated\n              operating current or short-circuit conditions.\n            <\/p>\n            <p>\n              The breaker adopts an integral design of the operating mechanism and the interrupter\/insulation\n              body, and can be supplied as a fixed installation unit or combined with a special propulsion\n              mechanism to form a withdrawable handcart unit.\n            <\/p>\n            <div class=\"badge-row\">\n              <span class=\"badge\">12kV<\/span>\n              <span class=\"badge\">Indoor<\/span>\n              <span class=\"badge\">Metal-clad switchgear<\/span>\n              <span class=\"badge\">Fixed \/ withdrawable<\/span>\n            <\/div>\n            <p>\n              The table below is derived from the VS1-12 technical parameter sheet and summarizes the main\n              electrical ratings.\n            <\/p>\n          <\/div>\n        <\/div>\n\n        <p class=\"block-title\">Main technical parameters \u2014 VS1-12<\/p>\n        <p class=\"block-note\">Values according to the VS1-12 medium-voltage vacuum circuit breaker data sheet.<\/p>\n        <div class=\"table-wrap\">\n          <table>\n            <thead>\n              <tr>\n                <th style=\"width:56px;\">No.<\/th>\n                <th>Item<\/th>\n                <th style=\"width:80px;\">Unit<\/th>\n                <th>VS1-12<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr><td>1<\/td><td>Rated voltage<\/td><td>kV<\/td><td>12<\/td><\/tr>\n              <tr><td>2<\/td><td>Rated frequency<\/td><td>Hz<\/td><td>50<\/td><\/tr>\n              <tr>\n                <td>3<\/td>\n                <td>Power frequency withstand voltage (1 min)<\/td>\n                <td>kV<\/td>\n                <td>42 \/ 48<\/td>\n              <\/tr>\n              <tr>\n                <td>4<\/td>\n                <td>Lightning impulse withstand voltage (peak)<\/td>\n                <td>kV<\/td>\n                <td>75 \/ 85<\/td>\n              <\/tr>\n              <tr>\n                <td>5<\/td>\n                <td>Rated short-circuit breaking current<\/td>\n                <td>kA<\/td>\n                <td>20 \/ 25 \/ 31.5 \/ 40<\/td>\n              <\/tr>\n              <tr>\n                <td>6<\/td>\n                <td>Rated current<\/td>\n                <td>A<\/td>\n                <td>630 \/ 1250 \/ 1600 \/ 2000 \/ 2500<\/td>\n              <\/tr>\n              <tr>\n                <td>7<\/td>\n                <td>Rated short-time breaking current (effective value)<\/td>\n                <td>kA<\/td>\n                <td>20 \/ 25 \/ 31.5 \/ 40<\/td>\n              <\/tr>\n              <tr>\n                <td>8<\/td>\n                <td>Rated peak breaking current (peak value)<\/td>\n                <td>kA<\/td>\n                <td>50 \/ 63 \/ 80 \/ 100<\/td>\n              <\/tr>\n              <tr>\n                <td>9<\/td>\n                <td>Rated short-circuit making current (peak value)<\/td>\n                <td>kA<\/td>\n                <td>50 \/ 63 \/ 80 \/ 100<\/td>\n              <\/tr>\n              <tr>\n                <td>10<\/td>\n                <td>Rated short-circuit current duration<\/td>\n                <td>s<\/td>\n                <td>4<\/td>\n              <\/tr>\n              <tr>\n                <td>11<\/td>\n                <td>Mechanical life<\/td>\n                <td>operations<\/td>\n                <td>20,000<\/td>\n              <\/tr>\n              <tr>\n                <td>12<\/td>\n                <td>Power frequency withstand voltage of secondary circuit (1 min)<\/td>\n                <td>V<\/td>\n                <td>2000<\/td>\n              <\/tr>\n              <tr>\n                <td>13<\/td>\n                <td>Rated operating sequence<\/td>\n                <td>\u2014<\/td>\n                <td>O \u2013 0.3&nbsp;s \u2013 CO \u2013 180&nbsp;s \u2013 CO<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <p class=\"block-title\">Outline &amp; mounting dimensions \u2014 VS1-12<\/p>\n        <p class=\"block-note\">\n          Outline and mounting dimensions of VS1-12 indoor vacuum circuit breaker for KYN28-type metal-clad switchgear.\n        <\/p>\n        <div class=\"dim-block\">\n          <figure class=\"dim-fig\">\n            <img decoding=\"async\" src=\"https:\/\/xbrele.com\/wp-content\/uploads\/2025\/11\/XBRELE-VS1-Vacuum-circuit-breaker-installing-dimension.webp\"\n                 alt=\"XBRELE VS1-12 indoor vacuum circuit breaker installation dimensions and mounting interface for KYN28 metal-clad switchgear\">\n            <figcaption>\n              VS1-12 installation dimensions and mounting interface for KYN28 and similar metal-clad switchgear panels.\n            <\/figcaption>\n          <\/figure>\n\n          <div class=\"dim-right\">\n            <div class=\"table-wrap\">\n              <table>\n                <thead>\n                  <tr>\n                    <th>Item<\/th>\n                    <th>Symbol<\/th>\n                    <th>Value (mm)<\/th>\n                    <th>Note<\/th>\n                  <\/tr>\n                <\/thead>\n                <tbody>\n                  <tr><td>Overall height<\/td><td>H<\/td><td>\u2014<\/td><td>Overall height of breaker assembly<\/td><\/tr>\n                  <tr><td>Overall width<\/td><td>W<\/td><td>\u2014<\/td><td>Including phase spacing<\/td><\/tr>\n                  <tr><td>Depth<\/td><td>D<\/td><td>\u2014<\/td><td>Total depth inside switchgear cubicle<\/td><\/tr>\n                  <tr><td>Mounting hole spacing (horizontal)<\/td><td>L1<\/td><td>\u2014<\/td><td>Handcart or fixed base bolt spacing<\/td><\/tr>\n                  <tr><td>Mounting hole spacing (vertical)<\/td><td>L2<\/td><td>\u2014<\/td><td>To match switchgear frame<\/td><\/tr>\n                  <tr><td>Mounting hole size<\/td><td>\u03a6<\/td><td>\u2014<\/td><td>Diameter of mounting bolts<\/td><\/tr>\n                <\/tbody>\n              <\/table>\n            <\/div>\n\n            <div class=\"cta-right-col\">\n              <a href=\"#ct-popup-882\" class=\"cta-btn\">\n                Request a VS1 quotation\n              <\/a>\n            <\/div>\n          <\/div>\n        <\/div>\n\n      <\/div><\/div><div id=\"lznd-12\" class=\"tab-content\">\n      <div class=\"panel-card\">\n        <div class=\"panel-grid\">\n          <figure class=\"main-fig\">\n            <img decoding=\"async\" src=\"https:\/\/xbrele.com\/wp-content\/uploads\/2025\/11\/XBRELE-LZND-Electric-Repulsion-VCB-Structure.webp\"\n                 alt=\"LZND-12 electric repulsion vacuum circuit breaker structure showing U-shaped mechanism and embedded poles for frequent switching\">\n            <figcaption>\n              LZND-12 electric repulsion VCB structure showing the innovative U-shaped mechanism and solid embedded poles.\n            <\/figcaption>\n          <\/figure>\n\n          <div class=\"panel-right\">\n            <h3>LZND-12 High-Endurance VCB<\/h3>\n            <p>\n              The LZND-12 is a new generation indoor vacuum circuit breaker designed for severe duty applications. \n              It features a unique <strong>electric repulsion compensation mechanism<\/strong> that separates normal load closing from short-circuit closing.\n            <\/p>\n            <p>\n              This innovative design significantly reduces mechanism size and power requirements while achieving an incredible mechanical life of <strong>300,000 operations<\/strong>. It is the ultimate choice for frequent switching in electric arc furnaces, soft starters, and mining hoists.\n            <\/p>\n            <div class=\"badge-row\">\n              <span class=\"badge\">12kV<\/span>\n              <span class=\"badge\">300,000 Operations<\/span>\n              <span class=\"badge\">Electric Repulsion<\/span>\n              <span class=\"badge\">Maintenance-Free<\/span>\n            <\/div>\n            <p>\n              The table below summarizes the key technical parameters of the LZND-12\/630-20U model.\n            <\/p>\n          <\/div>\n        <\/div>\n\n        <p class=\"block-title\">Main technical parameters \u2014 LZND-12<\/p>\n        <p class=\"block-note\">Values according to the LZND-12 electric repulsion vacuum circuit breaker data sheet.<\/p>\n        <div class=\"table-wrap\">\n          <table>\n            <thead>\n              <tr>\n                <th style=\"width:56px;\">No.<\/th>\n                <th>Item<\/th>\n                <th style=\"width:80px;\">Unit<\/th>\n                <th>LZND-12\/630-20U<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr><td>1<\/td><td>Rated voltage<\/td><td>kV<\/td><td>12<\/td><\/tr>\n              <tr><td>2<\/td><td>Rated frequency<\/td><td>Hz<\/td><td>50 \/ 60<\/td><\/tr>\n              <tr><td>3<\/td><td>Power frequency withstand voltage (1 min)<\/td><td>kV<\/td><td>42<\/td><\/tr>\n              <tr><td>4<\/td><td>Lightning impulse withstand voltage (peak)<\/td><td>kV<\/td><td>75<\/td><\/tr>\n              <tr><td>5<\/td><td>Rated short-circuit breaking current<\/td><td>kA<\/td><td>20<\/td><\/tr>\n              <tr><td>6<\/td><td>Rated current<\/td><td>A<\/td><td>630<\/td><\/tr>\n              <tr><td>7<\/td><td>Rated short-time withstand current (thermal)<\/td><td>kA<\/td><td>20<\/td><\/tr>\n              <tr><td>8<\/td><td>Rated peak withstand current (dynamic)<\/td><td>kA<\/td><td>50<\/td><\/tr>\n              <tr><td>9<\/td><td>Rated short-circuit making current (peak)<\/td><td>kA<\/td><td>50<\/td><\/tr>\n              <tr><td>10<\/td><td>Rated short-circuit duration<\/td><td>s<\/td><td>4<\/td><\/tr>\n              <tr><td>11<\/td><td><strong>Mechanical life<\/strong><\/td><td>ops<\/td><td><strong>300,000<\/strong><\/td><\/tr>\n              <tr><td>12<\/td><td>Closing time \/ Opening time<\/td><td>ms<\/td><td>60 \/ \u226440<\/td><\/tr>\n              <tr><td>13<\/td><td>Control voltage<\/td><td>V<\/td><td>AC\/DC 220<\/td><\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <p class=\"block-title\">Outline &amp; mounting dimensions \u2014 LZND-12<\/p>\n        <p class=\"block-note\">\n          Compact installation dimensions for LZND-12 electric repulsion vacuum circuit breaker.\n        <\/p>\n        <div class=\"dim-block\">\n          <figure class=\"dim-fig\">\n            <img decoding=\"async\" src=\"https:\/\/xbrele.com\/wp-content\/uploads\/2025\/11\/XBRELE-LZND-12-630-Installation-Dimension.webp\"\n                 alt=\"Installation dimensions of LZND-12\/630-20U electric repulsion vacuum circuit breaker for indoor switchgear panels\">\n            <figcaption>\n              Installation dimensions of LZND-12\/630-20U. The compact footprint allows for flexible integration into various switchgear designs.\n            <\/figcaption>\n          <\/figure>\n\n          <div class=\"dim-right\">\n            <div class=\"table-wrap\">\n              <table>\n                <thead>\n                  <tr>\n                    <th>Item<\/th>\n                    <th>Value (mm)<\/th>\n                    <th>Note<\/th>\n                  <\/tr>\n                <\/thead>\n                <tbody>\n                  <tr><td>Overall Width<\/td><td>480<\/td><td>Compact width<\/td><\/tr>\n                  <tr><td>Overall Depth<\/td><td>451<\/td><td>Including terminals<\/td><\/tr>\n                  <tr><td>Overall Height<\/td><td>380<\/td><td>Pole top<\/td><\/tr>\n                  <tr><td>Phase Spacing<\/td><td>165<\/td><td>(150\/180\/210 optional)<\/td><\/tr>\n                  <tr><td>Mounting Hole (W)<\/td><td>460<\/td><td>Base width<\/td><\/tr>\n                  <tr><td>Mounting Hole (D)<\/td><td>286<\/td><td>Base depth<\/td><\/tr>\n                <\/tbody>\n              <\/table>\n            <\/div>\n\n            <div class=\"cta-right-col\">\n              <a href=\"#ct-popup-882\" class=\"cta-btn\">\n                Request an LZND quotation\n              <\/a>\n            <\/div>\n          <\/div>\n        <\/div>\n\n      <\/div><\/div><\/div>\n\n  <script>\n    (function(){\n      const root = document.querySelector('#sec3-vs1-tech');\n      if(!root) return;\n      const tabs = root.querySelectorAll('.tab-btn');\n      const panels = root.querySelectorAll('.tab-content');\n\n      tabs.forEach(tab => {\n        tab.addEventListener('click', () => {\n          const target = tab.getAttribute('data-tab');\n          tabs.forEach(t => t.classList.remove('active'));\n          panels.forEach(p => p.classList.remove('active'));\n          tab.classList.add('active');\n          root.querySelector('#'+target).classList.add('active');\n        });\n      });\n    })();\n  <\/script>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-2ead54b\" data-block-id=\"2ead54b\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-2ead54b-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-ffe19ee\" data-v=\"4\" data-block-id=\"ffe19ee\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-ffe19ee-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-ffe19ee-inner-blocks\">\n<section id=\"sec4-vs1-features\" style=\"background:#ffffff;padding:90px 0 100px;\">\n  <style>\n    #sec4-vs1-features{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n      color:#0F172A;\n    }\n    #sec4-vs1-features .features-shell{\n      max-width:1600px;\n      margin:0 auto;\n      padding:0 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class=\"card\">\n        <span class=\"tag\">Protection<\/span>\n        <h3>Advanced protection schemes<\/h3>\n        <p>\n          Build coordinated protection for both standard and severe-duty applications using VS1 or LZND breakers combined with modern relays.\n        <\/p>\n        <ul>\n          <li>Over-current and earth-fault protection for utility feeders<\/li>\n          <li>Short-circuit protection up to <strong>50kA<\/strong> (LZND peak withstand)<\/li>\n          <li>Integrated CTs for protection and metering functions<\/li>\n          <li>Reliable fault clearing for transformers and capacitor banks<\/li>\n        <\/ul>\n      <\/article>\n\n      <article class=\"card\">\n        <span class=\"tag\">Control<\/span>\n        <h3>Mechanism &#038; operating options<\/h3>\n        <p>\n          Choose the operating mechanism that fits your duty cycle: standard spring for distribution or electric repulsion for frequent switching.\n        <\/p>\n        <ul>\n          <li><strong>VS1:<\/strong> Spring mechanism with motor\/manual charging<\/li>\n          <li><strong>LZND:<\/strong> Electric repulsion mechanism for <strong>300,000 ops<\/strong><\/li>\n          <li>Mechanical and electrical interlocks for safe operation<\/li>\n          <li>Auxiliary contacts for SCADA feedback and interlocking logic<\/li>\n        <\/ul>\n      <\/article>\n\n      <article class=\"card\">\n        <span class=\"tag\">Integration<\/span>\n        <h3>Switchgear &#038; system integration<\/h3>\n        <p>\n          Designed for flexibility, our breakers fit into new panels or serve as high-performance upgrades for existing installations.\n        <\/p>\n        <ul>\n          <li>Compatible with KYN28 12kV\/24kV metal-clad switchgear<\/li>\n          <li>Ideal for <strong>high-voltage soft starter<\/strong> cabinets (LZND)<\/li>\n          <li>Fixed or withdrawable handcart versions available<\/li>\n          <li>Custom terminal arrangements for seamless OEM integration<\/li>\n        <\/ul>\n      <\/article>\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-d353668\" data-block-id=\"d353668\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-d353668-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-91c98eb\" data-v=\"4\" data-block-id=\"91c98eb\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-91c98eb-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-91c98eb-inner-blocks\">\n<section id=\"sec5-vs1-quality\" style=\"background:#0B1220;padding:72px 0 78px;color:#E5E7EB;\">\n  <style>\n    #sec5-vs1-quality{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n    }\n    #sec5-vs1-quality .quality-shell{\n      max-width:1500px;\n    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.qa-note{\n      font-size:12px;\n      color:#9CA3AF;\n      margin-top:4px;\n    }\n\n    @media(max-width:1000px){\n      #sec5-vs1-quality .grid{\n        grid-template-columns:1fr;\n      }\n    }\n    @media(max-width:690px){\n      #sec5-vs1-quality .quality-shell{padding:0 18px;}\n      #sec5-vs1-quality h2{font-size:22px;}\n    }\n  <\/style>\n\n  <div class=\"quality-shell\">\n    <div class=\"sec-header\">\n      <div class=\"kicker\">Manufacturing &amp; quality control<\/div>\n      <h2>How XBRELE builds reliable VS1 &#038; LZND vacuum circuit breakers<\/h2>\n      <p>\n        Behind every VS1 and LZND unit there is a controlled manufacturing flow \u2013 from vacuum interrupter\n        inspection to routine testing \u2013 designed to ensure long-term reliability in metal-clad\n        switchgear applications.\n      <\/p>\n    <\/div>\n\n    <div class=\"grid\">\n      <article class=\"process-card\">\n        <h3>From vacuum interrupter to finished breaker<\/h3>\n        <p>\n          XBRELE manufactures the vacuum interrupter assemblies, mechanism and breaker body in\n          a coordinated process. Each step is monitored and recorded for traceability of every\n          VS1 and LZND circuit breaker.\n        <\/p>\n\n        <ul class=\"step-list\">\n          <li class=\"step\">\n            <div class=\"step-badge\">01<\/div>\n            <div>\n              <h4>Vacuum interrupter inspection<\/h4>\n              <p>\n                Vacuum interrupters are checked for contact stroke, over-travel, contact resistance\n                and vacuum integrity before assembly.\n              <\/p>\n            <\/div>\n          <\/li>\n          <li class=\"step\">\n            <div class=\"step-badge\">02<\/div>\n            <div>\n              <h4>Insulation &amp; pole assembly<\/h4>\n              <p>\n                Interrupters are built into insulated pole units (VS1) or embedded poles (LZND) to\n                provide stable dielectric performance in service.\n              <\/p>\n            <\/div>\n          <\/li>\n          <li class=\"step\">\n            <div class=\"step-badge\">03<\/div>\n            <div>\n              <h4>Mechanism integration &amp; adjustment<\/h4>\n              <p>\n                The operating mechanism (spring or electric repulsion) is assembled and adjusted so \n                opening\/closing speeds and bounce times remain within strict limits.\n              <\/p>\n            <\/div>\n          <\/li>\n          <li class=\"step\">\n            <div class=\"step-badge\">04<\/div>\n            <div>\n              <h4>Handcart \/ fixed-frame assembly<\/h4>\n              <p>\n                Breaker poles and mechanism are mounted on a withdrawable handcart or fixed frame and\n                matched with the KYN28 switchgear interface.\n              <\/p>\n            <\/div>\n          <\/li>\n          <li class=\"step\">\n            <div class=\"step-badge\">05<\/div>\n            <div>\n              <h4>Routine testing &amp; final inspection<\/h4>\n              <p>\n                Each breaker passes electrical, mechanical and dielectric tests before packing,\n                with serial numbers linked to quality records.\n              <\/p>\n            <\/div>\n          <\/li>\n        <\/ul>\n      <\/article>\n\n      <section class=\"qa-card\">\n        <div class=\"qa-section\">\n          <div class=\"qa-label\">Electrical &amp; dielectric tests<\/div>\n          <h3>Routine tests for every breaker<\/h3>\n          <p>Electrical routine tests verify insulation level and switching performance of each pole.<\/p>\n        <\/div>\n\n        <div class=\"qa-block\">\n          <h4>Insulation &amp; switching verification<\/h4>\n          <ul>\n            <li>Power-frequency withstand tests between phases and to earth<\/li>\n            <li>Impulse withstand tests on a sample basis according to project requirements<\/li>\n            <li>Contact resistance measurement for each main circuit<\/li>\n            <li>Mechanical operating tests for O \/ CO sequences at rated control voltage<\/li>\n          <\/ul>\n          <p class=\"qa-note\">Routine-test records can be supplied together with the delivery if required.<\/p>\n        <\/div>\n\n        <div class=\"qa-block\">\n          <h4>Mechanical reliability<\/h4>\n          <ul>\n            <li>Verification of 30,000 (VS1) to <strong>300,000 (LZND)<\/strong> mechanical operations<\/li>\n            <li>Check of opening and closing speeds within specified limits<\/li>\n            <li>Control of closing bounce time and pole synchronism<\/li>\n            <li>Environmental checks for lubrication and low-temperature operation<\/li>\n          <\/ul>\n        <\/div>\n\n        <div class=\"qa-block\">\n          <h4>Documentation &amp; traceability<\/h4>\n          <ul>\n            <li>Type-test reports and routine-test certificates for VS1 &#038; LZND series<\/li>\n            <li>Factory inspection records with serial-number traceability<\/li>\n            <li>Outline drawings, wiring and terminal diagrams in digital format<\/li>\n            <li>Recommended maintenance guidelines for substation and industrial users<\/li>\n          <\/ul>\n          <p class=\"qa-note\">\n            FAT \/ QAP \/ ITP witness testing can be arranged for utility and EPC projects on request.\n          <\/p>\n        <\/div>\n      <\/section>\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-970f866\" data-block-id=\"970f866\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-970f866-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-10656bd\" data-v=\"4\" data-block-id=\"10656bd\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-10656bd-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-10656bd-inner-blocks\">\n<section id=\"sec6-vs1-delivery\" style=\"background:#FFFFFF;padding:86px 0 96px;color:#0F172A;\">\n  <style>\n    #sec6-vs1-delivery{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n    }\n    #sec6-vs1-delivery .delivery-shell{\n      max-width:1600px;\n      margin:0 auto;\n      padding:0 5vw;\n    }\n    #sec6-vs1-delivery .sec-header{\n      max-width:820px;\n      margin:0 auto 40px;\n      text-align:center;\n    }\n    #sec6-vs1-delivery .kicker{\n      text-transform:uppercase;\n      letter-spacing:.16em;\n      font-size:12px;\n      font-weight:600;\n      color:#38BDF8;\n      margin-bottom:8px;\n    }\n    #sec6-vs1-delivery h2{\n      font-size:26px;\n      margin:0 0 10px;\n      color:#0F172A;\n    }\n    #sec6-vs1-delivery .sec-header p{\n      margin:0;\n      font-size:15px;\n      color:#4B5563;\n      line-height:1.8;\n    }\n\n    #sec6-vs1-delivery .grid{\n      display:grid;\n      grid-template-columns:repeat(3,minmax(0,1fr));\n      gap:22px;\n      align-items:stretch;\n    }\n    #sec6-vs1-delivery .card{\n      border-radius:20px;\n      border:1px solid #E5E7EB;\n      background:#F9FAFB;\n      padding:20px 20px 22px;\n      box-shadow:0 14px 32px rgba(15,23,42,.04);\n      display:flex;\n      flex-direction:column;\n    }\n    #sec6-vs1-delivery .card h3{\n      font-size:16px;\n      margin:0 0 6px;\n      color:#0F172A;\n    }\n    #sec6-vs1-delivery .card p{\n      font-size:14px;\n      color:#4B5563;\n      line-height:1.8;\n      margin:0 0 8px;\n    }\n    #sec6-vs1-delivery .card ul{\n      list-style:none;\n      padding:0;\n      margin:4px 0 0;\n      font-size:13.5px;\n      color:#374151;\n    }\n    #sec6-vs1-delivery .card li{\n      position:relative;\n      padding-left:14px;\n      margin-bottom:4px;\n      line-height:1.7;\n    }\n    #sec6-vs1-delivery .card li::before{\n      content:\"\";\n      position:absolute;\n      left:0;\n      top:8px;\n      width:6px;\n      height:6px;\n      border-radius:999px;\n      background:#38BDF8;\n    }\n\n    #sec6-vs1-delivery .cta-row{\n      margin-top:30px;\n      display:flex;\n      justify-content:center;\n    }\n    #sec6-vs1-delivery .cta-btn{\n      display:inline-flex;\n      align-items:center;\n      justify-content:center;\n      padding:11px 30px;\n      border-radius:999px;\n      border:none;\n      background:#0F172A;\n      color:#F9FAFB;\n      font-size:14px;\n      font-weight:600;\n      text-decoration:none;\n      letter-spacing:.03em;\n      box-shadow:0 12px 28px rgba(15,23,42,.18);\n      cursor:pointer;\n      transition:background .2s ease, transform .2s ease, box-shadow .2s ease;\n    }\n    #sec6-vs1-delivery .cta-btn:hover{\n      background:#1E293B;\n      transform:translateY(-1px);\n      box-shadow:0 16px 36px rgba(15,23,42,.25);\n    }\n\n    @media(max-width:1000px){\n      #sec6-vs1-delivery .grid{\n        grid-template-columns:repeat(2,minmax(0,1fr));\n      }\n    }\n    @media(max-width:690px){\n      #sec6-vs1-delivery .delivery-shell{padding:0 18px;}\n      #sec6-vs1-delivery .grid{\n        grid-template-columns:1fr;\n      }\n      #sec6-vs1-delivery h2{font-size:24px;}\n    }\n  <\/style>\n\n  <div class=\"delivery-shell\">\n    <div class=\"sec-header\">\n      <div class=\"kicker\">Delivery, export packing &#038; support<\/div>\n      <h2>Global logistics for standard &#038; high-performance VCBs<\/h2>\n      <p>\n        XBRELE delivers both standard VS1 breakers and specialized LZND units worldwide. We provide export-grade packing and technical support to ensure your indoor switchgear projects run smoothly.\n      <\/p>\n    <\/div>\n\n    <div class=\"grid\">\n      <article class=\"card\">\n        <h3>Lead time &#038; availability<\/h3>\n        <p>\n          We maintain stock of common VS1 components for fast assembly, while specialized LZND units are built to order.\n        <\/p>\n        <ul>\n          <li><strong>VS1 (Standard):<\/strong> 15\u201320 days lead time<\/li>\n          <li><strong>LZND (Custom):<\/strong> 25\u201335 days for production &#038; testing<\/li>\n          <li>Low MOQ for OEM panel builders<\/li>\n          <li>Urgent air freight options for critical spares<\/li>\n        <\/ul>\n      <\/article>\n\n      <article class=\"card\">\n        <h3>Secure export packing<\/h3>\n        <p>\n          All breakers are packed to withstand long-distance transport, ensuring mechanism integrity upon arrival.\n        <\/p>\n        <ul>\n          <li>Reinforced wooden crates with shock-absorbing foam<\/li>\n          <li>Vacuum-sealed packaging for moisture protection<\/li>\n          <li>LZND mechanisms secured with extra bracing<\/li>\n          <li>Full shipping documentation (FOB\/CIF\/DDP) provided<\/li>\n        <\/ul>\n      <\/article>\n\n      <article class=\"card\">\n        <h3>Technical &#038; project support<\/h3>\n        <p>\n          Our engineering team assists with integration into KYN28 panels and custom industrial cabinets.\n        <\/p>\n        <ul>\n          <li>2D\/3D CAD models for panel layout design<\/li>\n          <li><strong>LZND Selection Guide<\/strong> for frequent switching duty<\/li>\n          <li>Wiring diagrams &#038; interlock logic support<\/li>\n          <li>Remote commissioning assistance available<\/li>\n        <\/ul>\n      <\/article>\n    <\/div>\n\n    <div class=\"cta-row\">\n      <a href=\"#ct-popup-882\" class=\"cta-btn\">\n        Get a Quote for VS1 \/ LZND\n      <\/a>\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-stackable-columns alignfull stk-block-columns stk-block stk-6d0bf80\" data-block-id=\"6d0bf80\"><div class=\"stk-row stk-inner-blocks stk-block-content stk-content-align stk-6d0bf80-column alignfull\">\n<div class=\"wp-block-stackable-column stk-block-column stk-column stk-block stk-4961aed\" data-v=\"4\" data-block-id=\"4961aed\"><div class=\"stk-column-wrapper stk-block-column__content stk-container stk-4961aed-container stk--no-background stk--no-padding\"><div class=\"stk-block-content stk-inner-blocks stk-4961aed-inner-blocks\">\n<section id=\"sec7-vs1-faq\" style=\"background:#F9FAFB;padding:90px 0 96px;color:#0F172A;\">\n  <style>\n    #sec7-vs1-faq{\n      font-family:system-ui,-apple-system,BlinkMacSystemFont,\"Segoe UI\",Arial,sans-serif;\n    }\n    #sec7-vs1-faq .faq-shell{\n      max-width:1600px;\n      margin:0 auto;\n      padding:0 5vw;\n    }\n    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justify-content:space-between;\n      gap:12px;\n    }\n    #sec7-vs1-faq summary::-webkit-details-marker{\n      display:none;\n    }\n    #sec7-vs1-faq .q-title{\n      font-size:14.5px;\n      font-weight:600;\n      color:#111827;\n    }\n    #sec7-vs1-faq .q-icon{\n      flex-shrink:0;\n      width:18px;\n      height:18px;\n      border-radius:999px;\n      border:1px solid #D1D5DB;\n      display:flex;\n      align-items:center;\n      justify-content:center;\n      font-size:12px;\n      color:#6B7280;\n      margin-top:2px;\n    }\n    #sec7-vs1-faq details[open] .q-icon{\n      background:#0F172A;\n      color:#F9FAFB;\n      border-color:#0F172A;\n    }\n    #sec7-vs1-faq .answer{\n      margin-top:10px;\n      padding-top:8px;\n      border-top:1px solid #E5E7EB;\n      font-size:14px;\n      color:#4B5563;\n      line-height:1.8;\n    }\n    #sec7-vs1-faq .answer p{\n      margin:0 0 8px;\n    }\n    #sec7-vs1-faq .answer ul{\n      margin:4px 0 0 18px;\n      padding:0;\n      font-size:13.5px;\n      color:#374151;\n    }\n    #sec7-vs1-faq .answer li{\n      margin-bottom:4px;\n      line-height:1.7;\n    }\n\n    @media(max-width:690px){\n      #sec7-vs1-faq .faq-shell{padding:0 18px;}\n      #sec7-vs1-faq h2{font-size:24px;}\n    }\n  <\/style>\n\n  <div class=\"faq-shell\">\n    <div class=\"sec-header\">\n      <div class=\"kicker\">VS1 series FAQ<\/div>\n      <h2>Frequently asked questions about VS1 vacuum circuit breaker<\/h2>\n      <p>\n        The answers below cover typical questions from panel builders, EPC contractors and\n        utilities when selecting and applying VS1 indoor vacuum circuit breakers.\n      <\/p>\n    <\/div>\n\n    <div class=\"faq-list\">\n      <!-- Q1 -->\n      <details open>\n        <summary>\n          <div class=\"q-title\">What are the typical applications of the VS1 indoor vacuum circuit breaker?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            VS1 indoor vacuum circuit breakers are mainly used in metal-clad switchgear such as\n            KYN28-12 \/ KYN28-24 panels for medium-voltage distribution systems.\n          <\/p>\n          <ul>\n            <li>Incoming and outgoing feeders in 6\u201312&nbsp;kV or 24&nbsp;kV substations<\/li>\n            <li>Transformer feeder bays and capacitor bank switching bays<\/li>\n            <li>Industrial plant distribution boards and motor control centers<\/li>\n            <li>Replacement of ageing oil or SF<sub>6<\/sub> breakers in existing switchgear<\/li>\n          <\/ul>\n        <\/div>\n      <\/details>\n\n      <!-- Q2 -->\n      <details>\n        <summary>\n          <div class=\"q-title\">Which standards does the VS1 vacuum circuit breaker comply with?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            VS1 breakers are designed and type-tested according to international and national\n            standards for high-voltage AC circuit breakers, typically including:\n          <\/p>\n          <ul>\n            <li>\n              IEC standard\n              <a href=\"https:\/\/webstore.iec.ch\/publication\/22297\" target=\"_blank\" rel=\"noopener\">\n                IEC&nbsp;62271-100\n              <\/a>\n              (High-voltage switchgear and controlgear \u2013 AC circuit-breakers)\n            <\/li>\n            <li>Relevant national standards such as GB\/T 1984 for AC high-voltage circuit breakers<\/li>\n            <li>Project-specific utility or tender requirements where applicable<\/li>\n          <\/ul>\n        <\/div>\n      <\/details>\n\n      <!-- Q3 -->\n      <details>\n        <summary>\n          <div class=\"q-title\">How should I select rated current and breaking capacity for a VS1 breaker?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            Rated current and breaking capacity must be coordinated with the system short-circuit\n            level and the load of the feeder or transformer.\n          <\/p>\n          <ul>\n            <li>Choose 630&nbsp;A, 1250&nbsp;A or higher current according to busbar and feeder loading<\/li>\n            <li>Select rated short-circuit breaking current based on calculated fault level at the panel<\/li>\n            <li>Check making current (peak) and short-time withstand current with the switchgear supplier<\/li>\n            <li>Ensure CT ratios and protection relay settings match the selected VS1 rating<\/li>\n          <\/ul>\n          <p>\n            For complex projects, XBRELE can review single-line diagrams and fault level calculations\n            to help confirm the correct VS1 rating.\n          <\/p>\n        <\/div>\n      <\/details>\n\n      <!-- Q4 -->\n      <details>\n        <summary>\n          <div class=\"q-title\">What control voltages and auxiliary circuits are available for VS1?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            The VS1 spring operating mechanism can be supplied with different control voltages and\n            auxiliary circuits to match the switchgear design.\n          <\/p>\n          <ul>\n            <li>Common control voltages: DC110&nbsp;V, DC220&nbsp;V, AC110&nbsp;V or AC220&nbsp;V<\/li>\n            <li>Auxiliary contacts for open\/close status, spring charged indication and trip signals<\/li>\n            <li>Terminals for shunt trip, closing coil and anti-pumping circuit<\/li>\n            <li>Optional under-voltage trip and closing interlocks on request<\/li>\n          <\/ul>\n        <\/div>\n      <\/details>\n\n      <!-- Q5 -->\n      <details>\n        <summary>\n          <div class=\"q-title\">What maintenance is recommended for VS1 indoor vacuum circuit breakers?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            Compared with oil or SF<sub>6<\/sub> breakers, VS1 vacuum circuit breakers require only\n            limited routine maintenance, but periodic checks are still important.\n          <\/p>\n          <ul>\n            <li>Regular visual inspection of insulation surfaces, shutters and earthing devices<\/li>\n            <li>Checking mechanical operation, interlocks and racking mechanism<\/li>\n            <li>Measurement of contact resistance and mechanism opening\/closing times when needed<\/li>\n            <li>Cleaning and lubrication according to the maintenance guidelines provided by XBRELE<\/li>\n          <\/ul>\n          <p>\n            For critical substations, condition-based monitoring and periodic diagnostic testing can\n            be added to extend service life and improve reliability.\n          <\/p>\n        <\/div>\n      <\/details>\n\n      <!-- Q6 -->\n      <details>\n        <summary>\n          <div class=\"q-title\">Is the VS1 breaker interchangeable with ABB, Schneider, Siemens or Eaton panels?<\/div>\n          <div class=\"q-icon\">+<\/div>\n        <\/summary>\n        <div class=\"answer\">\n          <p>\n            VS1 breakers are mainly designed for use in Chinese and international metal-clad switchgear\n            such as KYN28-type panels, and can in some cases be adapted as a replacement in panels\n            originally equipped with other brands.\n          <\/p>\n          <ul>\n            <li>Mechanical interface (racking, shutters, fixed contacts) must match the original panel design<\/li>\n            <li>Primary circuit dimensions and insulation clearances need to be checked against the existing busbar system<\/li>\n            <li>Control wiring, auxiliary contacts and interlocks must be adapted to the panel\u2019s schematic<\/li>\n            <li>In many cases a dedicated retrofit study or adapter handcart is required<\/li>\n          <\/ul>\n          <p>\n            For any replacement of ABB, Schneider, Siemens, Eaton or other OEM breakers, XBRELE recommends\n            providing panel drawings, photos and nameplate data so that a detailed compatibility check\n            can be carried out before offering a retrofit solution.\n          <\/p>\n        <\/div>\n      <\/details>\n    <\/div>\n  <\/div>\n<\/section>\n<\/div><\/div><\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>INDOOR VACUUM CIRCUIT BREAKERS VS1 &#038; LZND Series: Standard Protection &#038; High-Endurance Solutions One portfolio covering the full spectrum of indoor medium-voltage switching. Choose the vs1 vacuum circuit breaker(ZN63) for standard 12kV\u201324kV distribution in KYN28 panels, or upgrade to the LZND Electric Repulsion VCB for ultra-fast switching and a mechanical life of 300,000 operations. Whether [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1071,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_gspb_post_css":"","footnotes":""},"class_list":["post-1154","page","type-page","status-publish","hentry"],"blocksy_meta":{"has_hero_section":"disabled","vertical_spacing_source":"custom","content_area_spacing":"bottom","styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":6}},"_links":{"self":[{"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/pages\/1154","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/comments?post=1154"}],"version-history":[{"count":6,"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/pages\/1154\/revisions"}],"predecessor-version":[{"id":2547,"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/pages\/1154\/revisions\/2547"}],"up":[{"embeddable":true,"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/pages\/1071"}],"wp:attachment":[{"href":"https:\/\/xbrele.com\/fr\/wp-json\/wp\/v2\/media?parent=1154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}