{"id":747,"date":"2026-05-20T15:21:18","date_gmt":"2026-05-20T15:21:18","guid":{"rendered":"https:\/\/haochengcompany.com\/?page_id=747"},"modified":"2026-07-04T13:58:32","modified_gmt":"2026-07-04T13:58:32","slug":"solid-insulated-ring-main-unit","status":"publish","type":"page","link":"https:\/\/haochengcompany.com\/fr\/gas-insulated-switchgear-gis-series\/solid-insulated-ring-main-unit\/","title":{"rendered":"Solid Insulated Ring Main Unit"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"747\" class=\"elementor elementor-747\" data-elementor-settings=\"{&quot;element_pack_global_tooltip_width&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_width_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_width_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;element_pack_global_tooltip_padding&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_padding_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_padding_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true},&quot;element_pack_global_tooltip_border_radius_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;top&quot;:&quot;&quot;,&quot;right&quot;:&quot;&quot;,&quot;bottom&quot;:&quot;&quot;,&quot;left&quot;:&quot;&quot;,&quot;isLinked&quot;:true}}\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-558ca7f e-flex e-con-boxed e-con e-parent\" data-id=\"558ca7f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-98171e6 elementor-widget elementor-widget-bdt-breadcrumbs\" data-id=\"98171e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"bdt-breadcrumbs.default\">\n\t\t\t\t\t<div class='bdt-ep-breadcrumbs-wrapper'><ul class=\"bdt-ep-breadcrumb breadcrumb-align-left\"><li><a href=\"https:\/\/haochengcompany.com\/fr\/\"><span class=\"bdt-ep-breadcrumbs-home-icon\"> <i aria-hidden=\"true\" class=\"fas fa-home\"><\/i> <\/span>Home<\/a><\/li>\n<li><span> Page<\/span><\/li>\n<\/ul><\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f350c26 e-flex e-con-boxed e-con e-child\" data-id=\"f350c26\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-c99b60f e-con-full e-flex e-con e-child\" data-id=\"c99b60f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-60d35f8 e-con-full e-flex e-con e-child\" data-id=\"60d35f8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-053b5d1 elementor-widget elementor-widget-image\" data-id=\"053b5d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"800\" src=\"https:\/\/haochengcompany.com\/wp-content\/uploads\/2026\/05\/solid-insulated-ring-main-unit.webp\" class=\"attachment-large size-large wp-image-533\" alt=\"\" srcset=\"https:\/\/haochengcompany.com\/wp-content\/uploads\/2026\/05\/solid-insulated-ring-main-unit.webp 1000w, https:\/\/haochengcompany.com\/wp-content\/uploads\/2026\/05\/solid-insulated-ring-main-unit-300x300.webp 300w, https:\/\/haochengcompany.com\/wp-content\/uploads\/2026\/05\/solid-insulated-ring-main-unit-150x150.webp 150w, https:\/\/haochengcompany.com\/wp-content\/uploads\/2026\/05\/solid-insulated-ring-main-unit-768x768.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e618c37 e-con-full e-flex e-con e-child\" data-id=\"e618c37\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-bf23ffb elementor-widget elementor-widget-heading\" data-id=\"bf23ffb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Solid Insulated Ring Main Unit<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89313aa elementor-widget__width-initial elementor-widget elementor-widget-heading\" data-id=\"89313aa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<div class=\"elementor-heading-title elementor-size-default\">Customizable<\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a00c642 elementor-widget elementor-widget-text-editor\" data-id=\"a00c642\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Solid insulated ring main unit is a fully insulated, fully sealed, maintenance-free solid insulated vacuum switchgear. All highvoltage ive parts are cast with epoxy resin materials with excellent insulation properties, integrating the vacuum arc extinguishing chamber, mainconductive crcuit, and insulating supports into a single unit Functionalunits are connected via a fully insulated solid busbar.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e951e73 e-grid e-con-full e-con e-child\" data-id=\"e951e73\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fe8d244 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"fe8d244\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjEzNCIsInRvZ2dsZSI6ZmFsc2V9\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">INQUIRY<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d722b7 elementor-align-left elementor-widget elementor-widget-button\" data-id=\"8d722b7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/haochengcompany.com\/fr\/technical-support\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">CAD.Blueprint<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-085f042 e-flex e-con-boxed e-con e-parent\" data-id=\"085f042\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-13d3c7d elementor-widget elementor-widget-html\" data-id=\"13d3c7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t\n\n<style>\n  .sir-card {\n    background: #fff;\n    border-radius: 10px;\n    box-shadow: 0 2px 16px rgba(0,0,0,0.07);\n    padding: 36px 40px;\n    margin-bottom: 28px;\n  }\n  .sir-section-title {\n    font-size: 19px;\n    font-weight: 700;\n    color: #1a1a2e;\n    margin-bottom: 20px;\n    padding-bottom: 12px;\n    border-bottom: 2px solid #e8eaf0;\n    position: relative;\n  }\n  .sir-section-title::before {\n    content: \"\";\n    position: absolute;\n    left: 0;\n    bottom: -2px;\n    width: 48px;\n    height: 2px;\n    background: #1a6fc4;\n    border-radius: 2px;\n  }\n  .sir-overview-text p {\n    font-size: 15px;\n    color: #555;\n    line-height: 1.85;\n    text-indent: 2em;\n    margin-bottom: 14px;\n  }\n  .sir-overview-text p:last-child { margin-bottom: 0; }\n  .sir-advantage-list {\n    list-style: none;\n    padding: 0;\n    margin: 0;\n    display: flex;\n    flex-direction: column;\n    gap: 10px;\n  }\n  .sir-advantage-list li {\n    display: flex;\n    align-items: flex-start;\n    gap: 12px;\n    font-size: 14px;\n    color: #444;\n    line-height: 1.6;\n  }\n  .sir-advantage-num {\n    width: 22px;\n    height: 22px;\n    background: linear-gradient(135deg, #1a6fc4, #3a8fd8);\n    color: #fff;\n    border-radius: 5px;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    font-size: 12px;\n    font-weight: 700;\n    flex-shrink: 0;\n    margin-top: 1px;\n  }\n  .sir-table-wrap {\n    border-radius: 8px;\n    overflow: hidden;\n    border: 1px solid #d8dde8;\n    margin-bottom: 20px;\n  }\n  .sir-table-wrap:last-child { margin-bottom: 0; }\n  .sir-param-table {\n    width: 100%;\n    border-collapse: collapse;\n    font-size: 13px;\n  }\n  .sir-param-table thead tr {\n    background: linear-gradient(90deg, #1a3a5c, #2a5fa0);\n  }\n  .sir-param-table th {\n    color: #fff;\n    font-weight: 500;\n    padding: 12px 14px;\n    text-align: center;\n    letter-spacing: 0.01em;\n    border-right: 1px solid rgba(255,255,255,0.15);\n  }\n  .sir-param-table th:last-child { border-right: none; }\n  .sir-param-table td {\n    padding: 11px 14px;\n    border-bottom: 1px solid #e4e8f2;\n    border-right: 1px solid #e4e8f2;\n    color: #444;\n    text-align: center;\n    vertical-align: middle;\n  }\n  .sir-param-table td:last-child { border-right: none; }\n  .sir-param-table td:first-child {\n    text-align: center;\n    font-weight: 500;\n    color: #2a3a52;\n  }\n  .sir-param-table td:nth-child(2) {\n    text-align: left;\n    font-weight: 500;\n    color: #2a3a52;\n  }\n  .sir-param-table td.unit-col {\n    width: 60px;\n    color: #888;\n    font-size: 12px;\n  }\n  .sir-param-table td.remark-col {\n    color: #666;\n    font-size: 12px;\n    text-align: left;\n  }\n  .sir-param-table tbody tr:nth-child(even) { background: #f7f9fd; }\n  .sir-param-table tbody tr:hover td { background: #eaf1fb; }\n  .sir-param-table tbody tr:last-child td { border-bottom: none; }\n  .sir-table-note {\n    font-size: 11px;\n    color: #888;\n    margin-top: 10px;\n    line-height: 1.7;\n  }\n  .sir-second-table th:first-child { width: 80px; }\n  .sir-second-table td:nth-child(2) { text-align: center; }\n<\/style>\n\n<!-- \u2500\u2500 Product Overview \u2500\u2500 -->\n<div class=\"sir-card\">\n  <h2 class=\"sir-section-title\">Product Overview<\/h2>\n  <div class=\"sir-overview-text\">\n    <p>The solid insulated ring main unit adopts solid insulation material as the medium, eliminating the disadvantages of traditional gas-insulated equipment such as SF6 gas greenhouse effect, complicated gas monitoring management, and high requirements for equipment installation environment. The solid insulation uses high-quality epoxy resin as the insulation material, which has excellent electrical performance, high mechanical strength, and good thermal stability. The vacuum circuit breaker is used as the functional unit, with a fully shielded and fully insulated design. All live parts are wrapped with solid insulation material, making the main circuit live parts completely isolated from the air, with an insulation level that does not decrease even in humid and polluted environments. The grounding switch is equipped with a special closing device, enabling reliable short-circuit closing capability.<\/p>\n    <p>The product is suitable for power distribution systems with rated voltage of 12kV and rated frequency of 50Hz, widely used in urban distribution networks, industrial and mining enterprises, power systems, infrastructure facilities, and other fields. It can meet the needs of various wiring modes such as single power supply, dual power supply, and ring network power supply. The product meets the standards of IEC62271-200 and GB3906.<\/p>\n  <\/div>\n<\/div>\n\n<!-- \u2500\u2500 Core Advantage \u2500\u2500 -->\n<div class=\"sir-card\">\n  <h2 class=\"sir-section-title\">Core Advantage<\/h2>\n  <ul class=\"sir-advantage-list\">\n    <li><span class=\"sir-advantage-num\">1<\/span><span>Environmentally friendly, no SF6 gas, no greenhouse gas emissions<\/span><\/li>\n    <li><span class=\"sir-advantage-num\">2<\/span><span>Compact structure, small footprint, can be installed in narrow spaces<\/span><\/li>\n    <li><span class=\"sir-advantage-num\">3<\/span><span>High reliability, excellent electrical performance, suitable for harsh environments<\/span><\/li>\n    <li><span class=\"sir-advantage-num\">4<\/span><span>Safe and reliable, all live parts are fully shielded and insulated<\/span><\/li>\n  <\/ul>\n<\/div>\n\n<!-- \u2500\u2500 Technical Parameters \u2500\u2500 -->\n<div class=\"sir-card\">\n  <h2 class=\"sir-section-title\">Technical Parameters<\/h2>\n  <div class=\"sir-table-wrap\">\n    <table class=\"sir-param-table\">\n      <thead>\n        <tr>\n          <th>No.<\/th>\n          <th>Parameters<\/th>\n          <th>Unit<\/th>\n          <th>Value<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1<\/td><td>Rated voltage<\/td><td class=\"unit-col\">kV<\/td><td>12<\/td><\/tr>\n        <tr><td>2<\/td><td>Rated frequency<\/td><td class=\"unit-col\">Hz<\/td><td>50<\/td><\/tr>\n        <tr><td>3<\/td><td>Rated current<\/td><td class=\"unit-col\">A<\/td><td>630<\/td><\/tr>\n        <tr><td>4<\/td><td>Rated short-time withstand current<\/td><td class=\"unit-col\">kA<\/td><td>20<\/td><\/tr>\n        <tr><td>5<\/td><td>Rated peak withstand current<\/td><td class=\"unit-col\">kA<\/td><td>50<\/td><\/tr>\n        <tr><td>6<\/td><td>Rated short-circuit duration<\/td><td class=\"unit-col\">s<\/td><td>3<\/td><\/tr>\n        <tr><td>7<\/td><td>Rated short-circuit breaking current<\/td><td class=\"unit-col\">kA<\/td><td>20<\/td><\/tr>\n        <tr><td>8<\/td><td>Rated short-circuit closing current (peak)<\/td><td class=\"unit-col\">kA<\/td><td>50<\/td><\/tr>\n        <tr><td>9<\/td><td>Rated transfer current<\/td><td class=\"unit-col\">A<\/td><td>1700<\/td><\/tr>\n        <tr><td>10<\/td><td>Mechanical life<\/td><td class=\"unit-col\">times<\/td><td>10000<\/td><\/tr>\n        <tr><td>11<\/td><td>Rated current breaking times<\/td><td class=\"unit-col\">times<\/td><td>100<\/td><\/tr>\n        <tr><td>12<\/td><td>Rated short-circuit breaking times<\/td><td class=\"unit-col\">times<\/td><td>30<\/td><\/tr>\n        <tr><td>13<\/td><td>Protection class<\/td><td class=\"unit-col\">\u2014<\/td><td>IP4X<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n  <div class=\"sir-table-wrap\">\n    <table class=\"sir-param-table sir-second-table\">\n      <thead>\n        <tr>\n          <th>Type<\/th>\n          <th>Note<\/th>\n          <th>I-1<\/th>\n        <\/tr>\n      <\/thead>\n      <tbody>\n        <tr><td>1<\/td><td>Rated voltage<\/td><td>12 kV<\/td><\/tr>\n        <tr><td>2<\/td><td>Rated frequency<\/td><td>50 Hz<\/td><\/tr>\n        <tr><td>3<\/td><td>Rated current<\/td><td>630 A<\/td><\/tr>\n        <tr><td>4<\/td><td>Rated short-time withstand current<\/td><td>20 kA \/ 3s<\/td><\/tr>\n        <tr><td>5<\/td><td>Rated peak withstand current<\/td><td>50 kA<\/td><\/tr>\n        <tr><td>6<\/td><td>Rated short-circuit breaking current<\/td><td>20 kA<\/td><\/tr>\n        <tr><td>7<\/td><td>Rated short-circuit closing current<\/td><td>50 kA<\/td><\/tr>\n        <tr><td>8<\/td><td>Rated transfer current<\/td><td>1700 A<\/td><\/tr>\n        <tr><td>9<\/td><td>Mechanical life<\/td><td>10000 times<\/td><\/tr>\n      <\/tbody>\n    <\/table>\n  <\/div>\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Home \u9875\u9762 Solid Insulated Ring Main Unit Customizable Solid insulated ring main unit is a fully insulated, fully sealed, maintenance-free solid insulated vacuum switchgear. All highvoltage ive parts are cast with epoxy resin materials with excellent insulation properties, integrating the vacuum arc extinguishing chamber, mainconductive crcuit, and insulating supports into a single unit Functionalunits are [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":650,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_joinchat":[],"footnotes":""},"class_list":["post-747","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/pages\/747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/comments?post=747"}],"version-history":[{"count":6,"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/pages\/747\/revisions"}],"predecessor-version":[{"id":1653,"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/pages\/747\/revisions\/1653"}],"up":[{"embeddable":true,"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/pages\/650"}],"wp:attachment":[{"href":"https:\/\/haochengcompany.com\/fr\/wp-json\/wp\/v2\/media?parent=747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}