{"id":539,"date":"2026-10-04T10:57:05","date_gmt":"2026-10-04T10:57:05","guid":{"rendered":"https:\/\/liqele.com\/products\/indoor-vacuum-circuit-breakers\/"},"modified":"2026-11-05T09:43:39","modified_gmt":"2026-11-05T09:43:39","slug":"indoor-vacuum-circuit-breakers","status":"publish","type":"page","link":"https:\/\/liqele.com\/fr\/products\/indoor-vacuum-circuit-breakers\/","title":{"rendered":"Disjoncteurs \u00e0 vide pour usage int\u00e9rieur"},"content":{"rendered":"\n<div class=\"liq-page alignfull\" data-liq-page=\"indoor-vacuum-circuit-breakers\" data-ic-layout=\"directory\">\n  <section class=\"lp-hero ic-hero\" aria-labelledby=\"indoor-title\">\n    <img decoding=\"async\" class=\"ic-hero-image\" src=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/workshop-hero-1920.webp\" width=\"1920\" height=\"1280\" alt=\"Indoor vacuum circuit breakers in the Liqiang assembly workshop\" srcset=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/workshop-hero-960.webp 960w, https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/workshop-hero-1920.webp 1920w\" sizes=\"100vw\" fetchpriority=\"high\">\n    <div class=\"lp-wrap ic-hero-inner\">\n      <div class=\"ic-hero-copy\"><p class=\"ic-location\">Indoor switching<\/p><h1 id=\"indoor-title\">Indoor vacuum<br><span>circuit breakers.<\/span><\/h1><p class=\"lp-lead\">Liqiang manufactures indoor vacuum circuit breakers for medium-voltage switchgear. Compare six series across 12 kV, 24 kV and 40.5 kV, with mounting, insulation and control options for your switchgear.<\/p><div class=\"lp-actions\"><a class=\"lp-button\" href=\"#indoor-models\">Compare indoor models<\/a><a class=\"lp-button-secondary\" href=\"\/contact\/?family=indoor&amp;request_type=selection\">Discuss indoor switching<\/a><\/div><\/div>\n      <p class=\"ic-hero-caption\">Liqiang workshop. Product arrangements vary by model.<\/p>\n    <\/div>\n  <\/section>\n  <nav class=\"ic-contents\" aria-label=\"Explore indoor breakers\"><div class=\"lp-wrap\"><a href=\"#indoor-models\">Models<\/a><a href=\"#indoor-overview\">Range<\/a><a href=\"#indoor-selection\">Requirements<\/a><a href=\"#indoor-inspection\">Manufacturing<\/a><a href=\"#indoor-manuals\">Documents<\/a><\/div><\/nav>\n  <section class=\"lp-section ic-model-section\" id=\"indoor-models\"><div class=\"lp-wrap\">\n    <div class=\"ic-section-heading\"><div><h2>Indoor vacuum circuit breaker <span>models<\/span><\/h2><p>Conventional VS1 arrangements, floor-mounted ZN85 and three-position VQL \/ VQLA series.<\/p><\/div><a class=\"ic-text-link\" href=\"#indoor-selection\">Prepare selection requirements<\/a><\/div>\n    <div class=\"ic-model-grid\">\n      <article class=\"ic-model\" id=\"indoor-vs1-12\"><a class=\"ic-model-image-link\" href=\"\/products\/vs1-12\/\" aria-label=\"View VS1-12 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vs1-12-front-angle-720x480-1.webp\" width=\"720\" height=\"480\" loading=\"lazy\" alt=\"VS1-12 withdrawable vacuum circuit breaker with embedded poles\"><figcaption>Withdrawable embedded-pole example<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/vs1-12\/\"><h3>VS1-12<\/h3><\/a><p class=\"ic-model-type\">Fixed \/ withdrawable \/ side-mounted \u00b7 12 kV<\/p><p class=\"ic-model-difference\">Conventional VS1 arrangements with installation and insulation structures to match the cabinet.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/vs1-12\/\">View VS1-12 details<\/a><\/div><\/div><\/div><\/article>\n      <article class=\"ic-model\" id=\"indoor-vs1-24\"><a class=\"ic-model-image-link\" href=\"\/products\/vs1-24\/\" aria-label=\"View VS1-24 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vs1-24-manual-product-432x288-1.webp\" width=\"432\" height=\"288\" loading=\"lazy\" alt=\"VS1(ZN63)-24 breaker illustration from the original Chinese manual\"><figcaption>Product illustration \u00b7 original manual<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/vs1-24\/\"><h3>VS1-24<\/h3><\/a><p class=\"ic-model-type\">Fixed \/ withdrawable \/ side-mounted \u00b7 24 kV<\/p><p class=\"ic-model-difference\">The 24 kV series, with arrangement-specific outline drawings and secondary circuits.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/vs1-24\/\">View VS1-24 details<\/a><\/div><\/div><\/div><\/article>\n      <article class=\"ic-model\" id=\"indoor-zn85\"><a class=\"ic-model-image-link\" href=\"\/products\/zn85-40-5\/\" aria-label=\"View ZN85-40.5 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/zn85-40-5-front-angle-720x480-1.webp\" width=\"720\" height=\"480\" loading=\"lazy\" alt=\"ZN85-40.5 floor-mounted indoor vacuum circuit breaker\"><figcaption>Floor-mounted arrangement example<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/zn85-40-5\/\"><h3>ZN85-40.5<\/h3><\/a><p class=\"ic-model-type\">Floor-mounted \u00b7 40.5 kV<\/p><p class=\"ic-model-difference\">A floor-mounted arrangement with its own cabinet envelope and connection layout.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/zn85-40-5\/\">View ZN85-40.5 details<\/a><\/div><\/div><\/div><\/article>\n      <article class=\"ic-model\" id=\"indoor-vql-12\"><a class=\"ic-model-image-link\" href=\"\/products\/vql-12\/\" aria-label=\"View VQL-12 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vql-12-front-720x480-1.webp\" width=\"720\" height=\"480\" loading=\"lazy\" alt=\"Front view of a VQL-12 three-position indoor vacuum circuit breaker\"><figcaption>VQL-12 arrangement example<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/vql-12\/\"><h3>VQL-12<\/h3><\/a><p class=\"ic-model-type\">Three-position \u00b7 12 kV<\/p><p class=\"ic-model-difference\">Three-position operation with model-specific indication, sequence and interlock interfaces.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/vql-12\/\">View VQL-12 details<\/a><\/div><\/div><\/div><\/article>\n      <article class=\"ic-model\" id=\"indoor-vql-24\"><a class=\"ic-model-image-link\" href=\"\/products\/vql-24\/\" aria-label=\"View VQL-24 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vql-24-manual-product-720x480-1.webp\" width=\"720\" height=\"480\" loading=\"lazy\" alt=\"VQL-24GD\/630-25 breaker illustration from the original Chinese manual\"><figcaption>Product illustration \u00b7 original manual<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/vql-24\/\"><h3>VQL-24<\/h3><\/a><p class=\"ic-model-type\">Three-position \u00b7 24 kV<\/p><p class=\"ic-model-difference\">The linked VQL-24GD manual covers a specific 630 A \/ 25 kA configuration.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/vql-24\/\">View VQL-24 details<\/a><\/div><\/div><\/div><\/article>\n      <article class=\"ic-model\" id=\"indoor-vqla\"><a class=\"ic-model-image-link\" href=\"\/products\/vqla-12\/\" aria-label=\"View VQLA-12 details\"><figure class=\"ic-model-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vqla-12-front-angle-720x480-1.webp\" width=\"720\" height=\"480\" loading=\"lazy\" alt=\"VQLA-12 middle-mounted three-position indoor vacuum circuit breaker\"><figcaption>Middle-mounted arrangement example<\/figcaption><\/figure><\/a><div class=\"ic-model-body\"><a class=\"ic-model-title-link\" href=\"\/products\/vqla-12\/\"><h3>VQLA-12<\/h3><\/a><p class=\"ic-model-type\">Middle-mounted three-position \u00b7 12 kV<\/p><p class=\"ic-model-difference\">The middle-mounted arrangement uses its own outline and secondary circuit drawings.<\/p><div class=\"ic-model-links\"><div class=\"ic-model-link-row\"><a class=\"ic-text-link\" href=\"\/products\/vqla-12\/\">View VQLA-12 details<\/a><\/div><\/div><\/div><\/article>\n    <\/div>\n  <\/div><\/section>\n  <section class=\"lp-section ip-section ip-overview-section\" id=\"indoor-overview\" aria-labelledby=\"indoor-overview-title\" data-range-layout=\"comparison\">\n<style data-indoor-range-layout>\n\/* Indoor SEC3: comparison first, concept illustration alongside. *\/\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-section-heading {\n  display: grid;\n  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);\n  gap: 48px;\n  align-items: end;\n  margin-bottom: 40px;\n}\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-section-heading h2 { max-width: 20ch; margin: 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-section-heading > p { max-width: 65ch; margin: 0; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-range-overview {\n  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);\n  gap: 40px;\n  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align-self: stretch;\n  width: 100%;\n  max-width: none;\n  margin: 0;\n  padding: 24px;\n  border: 0;\n  background: #F3F5F6;\n  box-shadow: none;\n}\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-selection-figure img { display: block; width: 100%; height: auto; max-height: 440px; object-fit: contain; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-selection-figure figcaption { margin-top: 16px; padding: 14px 0 0; border-top: 1px solid #D9DFE2; text-align: left; font-size: 12px; font-weight: 400; line-height: 1.6; color: #000; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-structure-notes { gap: 40px; margin-top: 32px; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-overview[data-range-layout=\"comparison\"] .ip-structure-notes summary { min-height: 60px; 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#indoor-overview[data-range-layout=\"comparison\"] .ip-structure-notes { gap: 24px; }\n}\n<\/style>\n<div class=\"lp-wrap\">\n    <div class=\"ip-section-heading\"><h2 id=\"indoor-overview-title\">Mounting, mechanisms and <span>insulation<\/span><\/h2><p>Indoor vacuum circuit breakers switch load current and interrupt short-circuit current in medium-voltage switchgear. Compare the voltage class and cabinet arrangement first, then specify the ratings and interfaces for the selected series.<\/p><\/div>\n    <div class=\"ip-range-overview\"><div class=\"ip-range-table\" id=\"indoor-construction\"><table><caption>Indoor breaker series by voltage and arrangement<\/caption><thead><tr><th scope=\"col\">Voltage class<\/th><th scope=\"col\">Series<\/th><th scope=\"col\">Selection starting point<\/th><\/tr><\/thead><tbody>\n      <tr><th scope=\"row\">12 kV<\/th><td><a href=\"\/products\/vs1-12\/\">VS1-12<\/a>, <a href=\"\/products\/vql-12\/\">VQL-12<\/a>, <a href=\"\/products\/vqla-12\/\">VQLA-12<\/a><\/td><td>Conventional fixed \/ withdrawable or side-mounted cabinet: VS1-12. Three-position operation: VQL-12. Middle-mounted three-position cabinet: VQLA-12.<\/td><\/tr>\n      <tr><th scope=\"row\">24 kV<\/th><td><a href=\"\/products\/vs1-24\/\">VS1-24<\/a>, <a href=\"\/products\/vql-24\/\">VQL-24<\/a><\/td><td>Conventional fixed \/ withdrawable or side-mounted cabinet: VS1-24. Three-position arrangement: VQL-24; match the documented VQL-24GD\/630-25 configuration.<\/td><\/tr>\n      <tr><th scope=\"row\">40.5 kV<\/th><td><a href=\"\/products\/zn85-40-5\/\">ZN85-40.5<\/a><\/td><td>Floor-mounted 40.5 kV arrangement: ZN85-40.5. Confirm the cabinet envelope and primary connections against its model outline.<\/td><\/tr>\n    <\/tbody><\/table><\/div>\n<figure class=\"ip-selection-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/indoor-switchgear-selection-1200.webp\" width=\"1200\" height=\"900\" loading=\"lazy\" alt=\"Concept view of a generic indoor switchgear cabinet and vacuum circuit breaker\"><figcaption>Concept illustration \u00b7 AI-generated. Configuration varies by model.<\/figcaption><\/figure><\/div>\n<div class=\"ip-structure-notes\">\n      <details><summary>Installation and switching functions<\/summary><p>Fixed or withdrawable describes installation. Side-, middle- and floor-mounted describe physical layout and operating access. VQL-12G(D) and VQLA-12G(D) combine circuit-breaking and isolation, with earthing in the D configuration. These functions differ from a withdrawable breaker&#8217;s service and test positions.<\/p><\/details>\n      <details><summary>Mechanism and pole insulation<\/summary><p>Spring mechanisms store mechanical energy for contact operation. Permanent-magnet versions use their specified drive and controller; match the operating supply and secondary schematic to the selected mechanism.<\/p><p>An insulating-cylinder design houses the vacuum interrupter in a separate cylinder. An embedded pole incorporates the interrupter and its connections in solid insulating material. Confirm the documented insulation clearances, terminal layout and rated combination for the selected version.<\/p><\/details>\n    <\/div>\n  <\/div><\/section>\n\n  <section class=\"lp-section ip-section ip-selection-section\" id=\"indoor-selection\" aria-labelledby=\"indoor-selection-title\" data-selection-layout=\"visual\">\n<style data-indoor-selection-layout>\n\/* Indoor SEC4: cabinet context, electrical review, interfaces, project files. *\/\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] { padding-top: 80px; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .lp-wrap { padding-bottom: 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-section-heading { max-width: 900px; margin-bottom: 40px; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-section-heading h2 { max-width: 25ch; 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width: 100%; height: auto; object-fit: contain; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-cabinet-figure figcaption { margin: 0; padding: 16px 0 0; font-size: 12px; line-height: 1.6; color: #000; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details { display: block; margin: 24px 0 0; padding: 0; border: 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details details { margin: 0; border: 0; border-top: 1px solid #D9DFE2; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details details:last-child { border-bottom: 1px solid #D9DFE2; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details summary { min-height: 58px; padding: 18px 0; font-size: 18px; line-height: 1.3; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details details p { padding: 0 0 20px; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-panel { min-width: 0; padding: 28px 32px; border: 0; background: #fff; box-shadow: none; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-panel > h3 { margin: 0 0 20px; font-size: 24px; line-height: 1.3; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid { display: block; margin: 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid > div { display: grid; grid-template-columns: minmax(120px, .75fr) minmax(0, 1.25fr); gap: 20px; padding: 20px 0; border-top: 1px solid #D9DFE2; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid dt { margin: 0; font-size: 16px; font-weight: 700; line-height: 1.5; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid dd { margin: 0; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-note { margin: 0; padding-top: 20px; border-top: 1px solid #D9DFE2; font-size: 14px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; margin: 40px 0 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid > div { padding-top: 24px; border-top: 1px solid #D9DFE2; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid dt { margin: 0 0 12px; font-size: 22px; font-weight: 700; line-height: 1.3; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid dd { margin: 0; max-width: 70ch; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .ip-project-reference { margin-top: 48px; padding: 40px 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .ip-project-reference > .lp-wrap { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 64px; align-items: start; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-files h3 { max-width: 28ch; margin: 0 0 16px; font-size: 24px; line-height: 1.3; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-files p { margin: 0; max-width: 70ch; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-files .ip-project-actions { margin-top: 24px; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-files .ip-project-actions .lp-button { color: #fff; text-decoration: none; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-scope { margin: 0; padding: 0; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-scope dt { margin: 0 0 16px; color: #fff; font-size: 22px; font-weight: 700; line-height: 1.3; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-scope dd { margin: 0; color: #e1e1e1; font-size: 15px; line-height: 1.75; }\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] :is(a, summary):focus-visible { outline: 2px solid #B92921; outline-offset: 4px; }\n@media (max-width: 1000px) {\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-selection-workspace { grid-template-columns: minmax(0, 1fr); gap: 32px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-cabinet-context { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 32px; align-items: center; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details { margin: 0; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid > div { grid-template-columns: minmax(140px, .55fr) minmax(0, 1.45fr); }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .ip-project-reference > .lp-wrap { gap: 36px; }\n}\n@media (max-width: 700px) {\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] { padding-top: 64px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-section-heading { margin-bottom: 28px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-section-heading > p { margin-top: 16px; font-size: 15px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-cabinet-context { display: block; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-cabinet-figure { padding: 16px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-integration-details { margin-top: 20px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-panel { padding: 24px 20px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-panel > h3 { font-size: 22px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid > div { display: block; padding-block: 18px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-rating-grid dt { margin-bottom: 8px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; margin-top: 32px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-input-grid dt { font-size: 20px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .ip-project-reference { margin-top: 36px; padding-block: 32px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] > .ip-project-reference > .lp-wrap { grid-template-columns: minmax(0, 1fr); gap: 28px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-files h3 { font-size: 22px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-scope { padding-top: 24px; border-top: 1px solid #52616b; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-selection[data-selection-layout=\"visual\"] .ip-project-scope dt { font-size: 20px; }\n}\n<\/style>\n<div class=\"lp-wrap\"><div class=\"ip-section-heading\"><h2 id=\"indoor-selection-title\">Switchgear installation and <span>product selection<\/span><\/h2><p>Find the mounting, connection and control details needed for new panels or replacement work.<\/p><\/div>\n<div class=\"ip-selection-workspace\"><div class=\"ip-cabinet-context\"><figure class=\"ip-cabinet-figure\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/indoor-cabinet-interface-1200.webp\" width=\"1200\" height=\"800\" loading=\"lazy\" alt=\"Concept illustration of an indoor breaker and switchgear cabinet interfaces\"><figcaption>Concept illustration \u00b7 AI-generated. Cabinet interfaces vary by model.<\/figcaption><\/figure>\n<div aria-label=\"New switchgear and replacement requirements\" class=\"ip-integration-details\" id=\"indoor-applications\">\n<details><summary>New switchgear<\/summary><p>Coordinate the outline, primary connections, insulation clearances and operating access with the cabinet design. Review the closing, tripping and indication circuits together with the interlocks and operating sequence.<\/p><\/details>\n<details><summary>Replacement equipment<\/summary><p>The same voltage class or model prefix does not establish interchangeability. Compare the installed equipment&#8217;s terminals, mounting, secondary connector pin assignments and interlocks with the proposed configuration. Include the nameplate, drawings and installation photographs.<\/p><\/details>\n<\/div><\/div>\n<div class=\"ip-rating-panel\"><h3>Electrical ratings<\/h3><dl class=\"ip-rating-grid\">\n<div><dt>Voltage and insulation<\/dt><dd>Rated voltage and insulation level required by the system.<\/dd><\/div>\n<div><dt>Current and breaking duty<\/dt><dd>Rated current addresses continuous load, whereas short-circuit breaking duty must be compared with the system fault current to be interrupted.<\/dd><\/div>\n<div><dt>Withstand currents<\/dt><dd>Short-time withstand current and duration, plus peak withstand current.<\/dd><\/div>\n<div><dt>Duty and service conditions<\/dt><dd>Frequency, operating sequence, temperature, altitude and other service conditions.<\/dd><\/div>\n<\/dl><p class=\"ip-rating-note\">A higher continuous-current rating does not, by itself, establish a higher breaking rating.<\/p><\/div><\/div>\n<dl class=\"ip-input-grid\"><div><dt>Cabinet interfaces<\/dt><dd>Installation arrangement, cabinet width, phase spacing, terminals, mounting dimensions and interlocks. Include the cabinet drawing.<\/dd><\/div><div><dt>Mechanism and insulation<\/dt><dd>Mechanism and pole insulation, operating supply, secondary connector, closing \/ tripping schematic, auxiliary contacts and indication.<\/dd><\/div><\/dl><\/div>\n<aside class=\"ip-project-reference\" id=\"indoor-inquiry\" aria-labelledby=\"indoor-inquiry-title\"><div class=\"lp-wrap\"><div class=\"ip-project-files\"><h3 id=\"indoor-inquiry-title\">Documents for a selection enquiry<\/h3><p>Provide the specification, cabinet drawing and secondary schematic with the full model designation. For replacement work, add the existing nameplate and installation photographs.<\/p><p class=\"ip-project-actions\"><a class=\"lp-button\" href=\"\/contact\/?family=indoor&amp;request_type=selection\">Discuss product selection<\/a><\/p><\/div><dl class=\"ip-project-scope\"><div><dt>Project requirements<\/dt><dd>Applicable standard and edition, required drawings and reports, quantity and destination.<\/dd><\/div><\/dl><\/div><\/aside><\/section>\n\n  <section class=\"lp-section ip-section ip-inspection-section\" id=\"indoor-inspection\" aria-labelledby=\"indoor-inspection-title\"><div class=\"lp-wrap\">\n    <div class=\"ip-section-heading\"><h2 id=\"indoor-inspection-title\">Circuit breaker <span>manufacturing<\/span> and inspection<\/h2><div><p>Zhejiang Liqiang Intelligent Equipment Co., Ltd. manufactures switching devices and operating mechanisms in Yueqing, Zhejiang, China.<\/p><p>Inspection addresses mechanical characteristics, circuit resistance and the applicable insulation or control circuits for the agreed configuration.<\/p><\/div><\/div>\n    <div class=\"ip-manufacturing-media\"><figure><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/assembly-960.webp\" width=\"960\" height=\"720\" loading=\"lazy\" alt=\"Operator working on indoor breaker mechanisms at the Liqiang assembly line\"><figcaption>Operating-mechanism assembly at Liqiang.<\/figcaption><\/figure><figure class=\"ip-tester\"><img decoding=\"async\" src=\"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/mechanical-testing-1000.webp\" width=\"1000\" height=\"748\" loading=\"lazy\" alt=\"XHR-8(B) switching-device mechanical characteristics tester in the Liqiang workshop\"><figcaption>Mechanical characteristics testing equipment.<\/figcaption><\/figure><\/div>\n    <details class=\"ip-inspection-records\"><summary>Assembly checks and records<\/summary><p>Factory inspection records identify the equipment, agreed configuration, checks performed and results. Match the named sample and rated combination in a test report to the breaker you need.<\/p><\/details>\n    <p class=\"ip-manufacturing-link\"><a href=\"\/about\/manufacturing-quality\/#inspection\">Explore Liqiang manufacturing and inspection<\/a><\/p>\n  <\/div><\/section>\n\n  <section class=\"lp-section ip-section ip-documents-section\" id=\"indoor-manuals\" aria-labelledby=\"indoor-manuals-title\"><div class=\"lp-wrap\">\n    <div class=\"ip-section-heading ip-documents-heading\"><h2 id=\"indoor-manuals-title\">Indoor vacuum circuit breaker <span>manuals<\/span><\/h2><div><p>Use the manuals for model-specific ratings, dimensions and secondary circuits. Match the document to the complete configuration.<\/p><p class=\"ip-document-count\" data-ip-document-count aria-live=\"polite\" aria-atomic=\"true\">6 manuals \u00b7 all voltages<\/p><\/div><\/div>\n    <div class=\"ip-document-workspace\" data-ip-documents>\n      <nav class=\"ip-document-filters\" aria-label=\"Browse manuals by voltage\"><a href=\"#indoor-manuals\" data-ip-filter=\"all\">All voltages<\/a><a href=\"#ip-doc-12\" data-ip-filter=\"12\">12 kV<\/a><a href=\"#ip-doc-24\" data-ip-filter=\"24\">24 kV<\/a><a href=\"#ip-doc-40-5\" data-ip-filter=\"40.5\">40.5 kV<\/a><\/nav>\n      <dl class=\"ip-document-list\">\n        <div class=\"ip-document-row\" id=\"ip-doc-12\" data-ip-document data-ip-voltage=\"12\"><dt>VS1-12<\/dt><dd><div><span class=\"ip-manual-scope\">2025 edition \u00b7 outline drawings and secondary circuits<\/span><span class=\"ip-document-meta\">PDF \u00b7 10.5 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vs1-12-manual.pdf\" class=\"ip-file-link\">Open VS1-12 manual<\/a><\/dd><\/div>\n        <div class=\"ip-document-row\" id=\"ip-doc-24\" data-ip-document data-ip-voltage=\"24\"><dt>VS1-24<\/dt><dd><div><span class=\"ip-manual-scope\">Installation arrangements, dimensions and secondary circuits<\/span><span class=\"ip-document-meta\">PDF \u00b7 7.0 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vs1-24-manual.pdf\" class=\"ip-file-link\">Open VS1-24 manual<\/a><\/dd><\/div>\n        <div class=\"ip-document-row\" id=\"ip-doc-40-5\" data-ip-document data-ip-voltage=\"40.5\"><dt>ZN85-40.5<\/dt><dd><div><span class=\"ip-manual-scope\">Floor-mounted outline, operation and circuit diagrams<\/span><span class=\"ip-document-meta\">PDF \u00b7 7.6 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/zn85-manual.pdf\" class=\"ip-file-link\">Open ZN85-40.5 manual<\/a><\/dd><\/div>\n        <div class=\"ip-document-row\" id=\"ip-doc-vql-12\" data-ip-document data-ip-voltage=\"12\"><dt>VQL-12<\/dt><dd><div><span class=\"ip-manual-scope\">Three-position operation and installation dimensions<\/span><span class=\"ip-document-meta\">PDF \u00b7 9.7 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vql-12-manual.pdf\" class=\"ip-file-link\">Open VQL-12 manual<\/a><\/dd><\/div>\n        <div class=\"ip-document-row\" id=\"ip-doc-vql-24\" data-ip-document data-ip-voltage=\"24\"><dt>VQL-24<\/dt><dd><div><span class=\"ip-manual-scope\">VQL-24GD\/630-25 \u00b7 specific configuration, control circuits and dimensions<\/span><span class=\"ip-document-meta\">PDF \u00b7 5.7 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vql-24-manual.pdf\" class=\"ip-file-link\">Open VQL-24 manual<\/a><\/dd><\/div>\n        <div class=\"ip-document-row\" id=\"ip-doc-vqla-12\" data-ip-document data-ip-voltage=\"12\"><dt>VQLA-12<\/dt><dd><div><span class=\"ip-manual-scope\">Middle-mounted outline and secondary circuits<\/span><span class=\"ip-document-meta\">PDF \u00b7 1.9 MB<\/span><\/div><a href=\"https:\/\/liqele.com\/wp-content\/uploads\/2026\/10\/vqla-12-manual.pdf\" class=\"ip-file-link\">Open VQLA-12 manual<\/a><\/dd><\/div>\n      <\/dl><p class=\"ip-document-empty\" data-ip-document-empty><\/p>\n    <\/div>\n    <div class=\"ip-document-questions\" id=\"indoor-faq\" aria-labelledby=\"indoor-faq-title\" data-faq-layout=\"sheet\">\n<style data-indoor-faq-layout>\n\/* Indoor document FAQ: shared heading, readable rows, native disclosure states. *\/\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] {\n  display: block;\n  margin-block-start: 48px;\n  padding: 36px 40px 12px;\n  border: 1px solid var(--ip-line, #D9DFE2);\n  background: var(--theme-palette-color-7, #fff);\n  scroll-margin-block-start: calc(var(--header-height, 96px) + 24px);\n}\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] .ip-faq-header {\n  display: grid;\n  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);\n  gap: 40px;\n  align-items: center;\n  margin-block-end: 28px;\n}\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] h3 {\n  max-inline-size: none;\n  margin: 0;\n  color: var(--ip-ink, #000);\n  font-size: 28px;\n  font-weight: 700;\n  line-height: 1.3;\n  text-wrap: balance;\n}\n.liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] h3 span { color: var(--ip-red, #B92921); 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padding: 20px 12px; gap: 16px; font-size: 16px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] summary::after { flex-basis: 32px; inline-size: 32px; block-size: 32px; }\n  .liq-page[data-liq-page=\"indoor-vacuum-circuit-breakers\"] #indoor-faq[data-faq-layout=\"sheet\"] details p { padding-block: 0 24px; padding-inline: 12px; font-size: 15px; }\n}\n<\/style>\n<div class=\"ip-faq-header\"><h3 id=\"indoor-faq-title\">Technical document <span>questions<\/span><\/h3><p class=\"ip-guide-link\">For help choosing a device, use the <a href=\"\/select-medium-voltage-switching-devices\/\">switching-device selection guide<\/a>.<\/p><\/div><div class=\"ip-faq-list\">\n      <details><summary>How do I choose between fixed and withdrawable indoor breakers?<\/summary><p>A fixed breaker mounts directly into the panel; a withdrawable breaker uses a carriage and mating primary connections. Compare the cabinet design, isolation arrangement, maintenance access and replacement requirements. Review the <a href=\"#indoor-overview\">mounting options<\/a> and the relevant model drawing before selecting the construction.<\/p><\/details>\n      <details><summary>What should I check when replacing an existing indoor breaker?<\/summary><p>Start with the existing nameplate and the required voltage, continuous current and fault duty. Then compare mounting or carriage dimensions, primary contacts, secondary connections, control supply and interlocks. Send the cabinet drawing and interface photographs for the <a href=\"#indoor-selection\">replacement and installation review<\/a>.<\/p><\/details>\n      <details><summary>Which outline and secondary drawings should I use?<\/summary><p>Match the drawings to the full model, mounting arrangement, primary connections and mechanism. Where a manual covers several versions, identify the applicable outline and secondary circuit before finalizing the specification.<\/p><\/details>\n    <\/div><\/div>\n  <\/div><\/section>\n  <nav class=\"ic-siblings\" aria-label=\"Other switching equipment\"><div class=\"lp-wrap\"><p>Other switching equipment<\/p><a href=\"\/products\/outdoor-vacuum-circuit-breakers\/\">Outdoor breakers<\/a><a href=\"\/products\/load-break-switches\/\">Load break switches<\/a><a href=\"\/products\/disconnectors-earthing-switches\/\">Isolation &amp; earthing<\/a><\/div><\/nav>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Indoor switching Indoor vacuumcircuit breakers. Liqiang manufactures indoor vacuum circuit breakers for medium-voltage switchgear. Compare six series across 12 kV, 24 kV and 40.5 kV, with mounting, insulation and control options for your switchgear. Compare indoor modelsDiscuss indoor switching Liqiang workshop. Product arrangements vary by model. ModelsRangeRequirementsManufacturingDocuments Indoor vacuum circuit breaker models Conventional VS1 arrangements, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":534,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"liq_structure_placeholder":false,"liq_content_page":true,"rank_math_title":"Indoor Vacuum Circuit Breaker Manufacturer | Liqiang","rank_math_description":"Liqiang manufactures 12, 24 and 40.5 kV indoor vacuum circuit breakers. Compare six series, mounting options, ratings and model-specific manuals.","rank_math_facebook_image":"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/indoor-breaker.webp","rank_math_twitter_image":"https:\/\/liqele.com\/wp-content\/plugins\/liq-site-components\/assets\/indoor-breaker.webp","footnotes":""},"class_list":["post-539","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/pages\/539","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/comments?post=539"}],"version-history":[{"count":28,"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/pages\/539\/revisions"}],"predecessor-version":[{"id":1857,"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/pages\/539\/revisions\/1857"}],"up":[{"embeddable":true,"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/pages\/534"}],"wp:attachment":[{"href":"https:\/\/liqele.com\/fr\/wp-json\/wp\/v2\/media?parent=539"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}