{"id":11418,"date":"2026-09-02T23:27:34","date_gmt":"2026-09-02T15:27:34","guid":{"rendered":"https:\/\/subian-electric.com\/?page_id=11418"},"modified":"2026-09-02T23:29:36","modified_gmt":"2026-09-02T15:29:36","slug":"substation-33kv","status":"publish","type":"page","link":"https:\/\/subian-electric.com\/fr\/substation-33kv\/","title":{"rendered":"Fabricants et Fournisseurs de Sous-stations 33kV"},"content":{"rendered":"<section class=\"web-sem-module web-sem-module-one\" style=\"min-width: 100%;\">\n<div class=\"web-sem-container\">\n<div class=\"web-sem-flex-box\">\n<div class=\"web-sem-text\"><span class=\"web-sem-tag\">COMPANY PROFILE<\/span><\/p>\n<h1>33kV Substation Manufacturers &amp; Suppliers &#8211; Factory-Built Compact Substations<\/h1>\n<p>Subian Electric manufactures compact substations and distribution equipment at our 50,000-square-metre factory in Xuzhou, Jiangsu, China. A 33kV substation built here arrives as one tested unit: the incoming 33kV switchgear, the step-down transformer and the low-voltage board are engineered together and assembled under one roof.<br \/>\nBecause the factory controls the transformer, the MV switchgear integration and the final wiring, buyers get a single point of responsibility for quality. Our 350+ staff have supplied power grids, utilities and industrial customers in more than 50 countries since 2019.<br \/>\nSend your primary voltage, transformer rating and site conditions. Our engineers will respond with a single-line diagram, general arrangement drawing and quotation.<\/p>\n<div style=\"margin-top: 24px;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.08);\" src=\"\/wp-content\/uploads\/2026\/08\/subian-product-certification-marks.png\" alt=\"Subian Electric ISO9001 CE and UL product certification marks\" \/><\/div>\n<div class=\"hy-lb-btn-wrap\" style=\"margin-top: 20px;\"><a class=\"hy-lb-btn\" href=\"\/contact-us\/\">Get a Quote<\/a><\/div>\n<\/div>\n<div class=\"web-sem-media\">\n<div class=\"web-sem-main-img web-sem-rect-75\"><img decoding=\"async\" class=\"web-sem-full\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformer-assembly-process.webp\" alt=\"Factory-built 33kV prefabricated substation assembly at Subian\" \/><\/div>\n<div class=\"web-sem-float-card\"><strong>Factory-Direct Manufacturer<\/strong><br \/>\nSince 2019 \u00b7 50,000m\u00b2 \u00b7 350+ Staff<\/div>\n<\/div>\n<\/div>\n<div class=\"web-sem-stats-grid\">\n<div class=\"web-sem-stat-item\"><strong>50,000m\u00b2<\/strong>Manufacturing Base<\/div>\n<div class=\"web-sem-stat-item\"><strong>Up to 110kV<\/strong>Type-Tested Capability<\/div>\n<div class=\"web-sem-stat-item\"><strong>350+<\/strong>Employees<\/div>\n<div class=\"web-sem-stat-item\"><strong>50+<\/strong>Countries Served<\/div>\n<div class=\"web-sem-stat-item\"><strong>OEM\/ODM<\/strong>Support<\/div>\n<div class=\"web-sem-stat-item\"><strong>Wholesale<\/strong>Supply<\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"singlepage-products-section\" style=\"min-width: 100%;\">\n<div class=\"singlepage-container\">\n<h2 class=\"singlepage-section-title\">33kV Compact Substations We Build<\/h2>\n<p class=\"singlepage-section-desc\">Factory-built 33\/11kV and 33\/0.4kV prefabricated substations from about 50 kVA to 2,500 kVA, in terminal or ring-fed configurations, complete with protection, metering and LV distribution.<\/p>\n<div class=\"woocommerce columns-4 \"><ul class=\"products columns-4\" data-products=\"type-3\" data-hover=\"zoom-in\">\n<li class=\"product type-product post-2007 status-publish first instock product_cat-dry-type-transformer product_cat-all-product product_cat-transformer product_tag-amorphous-alloy-transformer product_tag-dry-type-transformer product_tag-scbh-series has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/10kv-dry-type-transformer-scbh-series\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/f3d771df622f51ee2386b290a0e687e.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"10kV  Dry-Type Transformer-SCBH series Amorphous Alloy\" \/><h2 class=\"woocommerce-loop-product__title\">10kV  Dry-Type Transformer-SCBH series Amorphous Alloy<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/10kv-dry-type-transformer-scbh-series\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2007\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"2007\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;10kV  Dry-Type Transformer-SCBH series Amorphous Alloy&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2007\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1966 status-publish instock product_cat-dry-type-transformer product_cat-all-product product_cat-transformer product_tag-20-35kv-transformer product_tag-cast-resin-transformer product_tag-dry-type-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/20-35kv-dry-type-transformer\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/1-1.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"20-35KV  Dry-Type Transformer\" \/><h2 class=\"woocommerce-loop-product__title\">20-35KV  Dry-Type Transformer<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/20-35kv-dry-type-transformer\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1966\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1966\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;20-35KV  Dry-Type Transformer&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1966\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1999 status-publish instock product_cat-dry-type-transformer product_cat-all-product product_cat-transformer product_tag-cast-resin-transformer product_tag-dry-type-transformer product_tag-scb-series has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/20-35kv-scb-series-epoxy-resin-dry-type-transformer\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/1-1.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"20-35KV SCB Series Epoxy Resin Dry-Type Transformer\" \/><h2 class=\"woocommerce-loop-product__title\">20-35KV SCB Series Epoxy Resin Dry-Type Transformer<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/20-35kv-scb-series-epoxy-resin-dry-type-transformer\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1999\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1999\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;20-35KV SCB Series Epoxy Resin Dry-Type Transformer&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1999\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-2005 status-publish last instock product_cat-oil-immersed-transformer product_cat-all-product product_cat-transformer product_tag-20kv-transformer product_tag-distribution-transformer product_tag-oil-immersed-distribution-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/20kv-oil-immersed-distribution-transformer\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/20kv-high-voltage-oil-immersed-distribution-transformer-3.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"20KV Oil-immersed Distribution Transformer\" \/><h2 class=\"woocommerce-loop-product__title\">20KV Oil-immersed Distribution Transformer<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/20kv-oil-immersed-distribution-transformer\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2005\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"2005\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;20KV Oil-immersed Distribution Transformer&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2005\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-2001 status-publish first instock product_cat-oil-immersed-transformer product_cat-all-product product_cat-transformer product_tag-35kv-transformer product_tag-oil-immersed-power-transformer product_tag-power-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/35kv-oil-immersed-power-transformer\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/35kvoil-immersed-power-transformer-1.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"35KV Oil-immersed Power Transformer\" \/><h2 class=\"woocommerce-loop-product__title\">35KV Oil-immersed Power Transformer<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/35kv-oil-immersed-power-transformer\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2001\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"2001\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;35KV Oil-immersed Power Transformer&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2001\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1998 status-publish instock product_cat-oil-immersed-transformer product_cat-all-product product_cat-transformer product_tag-6-10kv-transformer product_tag-distribution-transformer product_tag-oil-immersed-distribution-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/6-10kv-oil-immersed-power-distribution-transformer\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/kp0a4190.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"6-10KV Oil-Immersed Power Distribution Transformer\" \/><h2 class=\"woocommerce-loop-product__title\">6-10KV Oil-Immersed Power Distribution Transformer<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/6-10kv-oil-immersed-power-distribution-transformer\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1998\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1998\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;6-10KV Oil-Immersed Power Distribution Transformer&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1998\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1932 status-publish instock product_cat-new-energy-box-change product_cat-all-product product_tag-current-transformer product_tag-epoxy-resin-ct product_tag-indoor-current-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-10kv-indoor-high-voltage\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/h4f0a38a16f8d431cabf296113e8a958291-300x300-1.jpg\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Current Transformer --10KV Indoor High Voltage\" \/><h2 class=\"woocommerce-loop-product__title\">Current Transformer &#8211;10KV Indoor High Voltage<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-10kv-indoor-high-voltage\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1932\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1932\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;Current Transformer --10KV Indoor High Voltage&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1932\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1926 status-publish last instock product_cat-new-energy-box-change product_cat-all-product product_tag-current-transformer product_tag-instrument-transformer product_tag-wound-current-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lmzk-wound-current-transformer300-5a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/h94b3287a0c02400cb3896e070dd056b3o-300x300.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Current Transformer--LMZK Wound Current Transformer300\/5a\" \/><h2 class=\"woocommerce-loop-product__title\">Current Transformer&#8211;LMZK Wound Current Transformer300\/5a<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lmzk-wound-current-transformer300-5a\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1926\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1926\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;Current Transformer--LMZK Wound Current Transformer300\/5a&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1926\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1928 status-publish first instock product_cat-new-energy-box-change product_cat-oil-immersed-transformer product_cat-all-product product_cat-transformer product_tag-bar-type-ct product_tag-current-transformer product_tag-three-phase-current-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lsy-10-transformer-integrated-ct\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/h2f56a44db3a6408d8a0975c84031b3bck11-300x300-1.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Current Transformer--LSY-10 transformer Integrated CT\" \/><h2 class=\"woocommerce-loop-product__title\">Current Transformer&#8211;LSY-10 transformer Integrated CT<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lsy-10-transformer-integrated-ct\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1928\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1928\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;Current Transformer--LSY-10 transformer Integrated CT&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1928\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1930 status-publish instock product_cat-new-energy-box-change product_cat-all-product product_tag-current-transformer product_tag-ground-fault-protection product_tag-zero-sequence-current-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lxk-high-voltage-zero-sequence\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/h5dcc01e22724407bbb4d1219883fc468a1-300x300-1.png\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"current transformer--LXK high voltage zero sequence\" \/><h2 class=\"woocommerce-loop-product__title\">current transformer&#8211;LXK high voltage zero sequence<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/current-transformer-lxk-high-voltage-zero-sequence\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1930\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1930\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;current transformer--LXK high voltage zero sequence&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1930\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-2003 status-publish instock product_cat-dry-type-transformer product_cat-all-product product_cat-transformer product_tag-cast-resin-transformer product_tag-dry-type-transformer product_tag-scb-series has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/dry-type-distribution-transformer-6-10-kv-scb-series\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/dry-type-distribution-transformer-6-10-KV-SCB-series-epoxy-resin-cast-1-1-2.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"dry type distribution transformer-6-10 KV SCB series epoxy resin cast\" \/><h2 class=\"woocommerce-loop-product__title\">dry type distribution transformer-6-10 KV SCB series epoxy resin cast<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/dry-type-distribution-transformer-6-10-kv-scb-series\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2003\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"2003\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;dry type distribution transformer-6-10 KV SCB series epoxy resin cast&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2003\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<li class=\"product type-product post-1934 status-publish last instock product_cat-new-energy-box-change product_cat-all-product product_tag-instrument-transformer product_tag-potential-transformer product_tag-voltage-transformer has-post-thumbnail shipping-taxable product-type-simple\">\n\t<a href=\"https:\/\/subian-electric.com\/fr\/product\/electrical-transformers-jdz-10-power-voltage\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/h62d1d2268850460b947a0f5239537f12m.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Electrical Transformers--JDZ - 10  Power Voltage\" \/><h2 class=\"woocommerce-loop-product__title\">Electrical Transformers&#8211;JDZ &#8211; 10  Power Voltage<\/h2>\n<\/a><a href=\"https:\/\/subian-electric.com\/fr\/product\/electrical-transformers-jdz-10-power-voltage\/\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1934\" data-quantity=\"1\" class=\"button product_type_simple\" data-product_id=\"1934\" data-product_sku=\"\" aria-label=\"En savoir plus sur &ldquo;Electrical Transformers--JDZ - 10  Power Voltage&rdquo;\" rel=\"nofollow\" data-success_message=\"\">Lire la suite<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1934\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-acbr\" aria-labelledby=\"subian-semv2-acbr-title\">\n<div class=\"subian-semv2-acbr-split\">\n<div class=\"subian-semv2-acbr-text\">\n<h2 id=\"subian-semv2-acbr-title\">What Is a 33kV Substation?<\/h2>\n<p class=\"subian-semv2-acbr-intro\">A 33kV substation receives power at 33kV and steps it down to a lower distribution level &#8211; most often 11kV or 400V\/230V &#8211; so the energy can be fed into regional networks or local consumers. In the prefabricated compact form used widely by utilities and industrial sites, the incoming ring-main unit or breaker, the power transformer and the low-voltage switchboard share one weatherproof enclosure built at the factory.<\/p>\n<p>Specifying a factory-assembled unit shortens on-site civil work, removes the need to coordinate several suppliers at a remote location, and delivers a plant whose protection grading, interlocking and cable routing were verified before shipment. That is why project teams increasingly choose this route over a site-erected building.<\/p>\n<\/div>\n<ul class=\"subian-semv2-acbr-points\">\n<li><strong>33 \/ 11 kV and 33 \/ 0.4 kV<\/strong> &#8211; standard configurations tailored to the network and the load.<\/li>\n<li><strong>One tested enclosure<\/strong> &#8211; HV switchgear, transformer and LV panel coordinated and tested together.<\/li>\n<li><strong>50,000 m\u00b2 factory<\/strong> &#8211; in-house enclosure fabrication, transformer build and switchgear wiring.<\/li>\n<li><strong>Up to 110 kV experience<\/strong> &#8211; type-tested transformer designs support project approval.<\/li>\n<li><strong>Full documentation<\/strong> &#8211; single-line diagram, drawings, test reports and manuals supplied.<\/li>\n<li><strong>OEM \/ ODM &amp; wholesale<\/strong> &#8211; utility branding, packaging and volume supply supported.<\/li>\n<\/ul>\n<\/div>\n<h3 class=\"subian-semv2-acbr-subtitle\">Common Configurations<\/h3>\n<p class=\"subian-semv2-acbr-subtitle-desc\">We build three families of compact 33kV substation, matched to the incoming network and the load served:<\/p>\n<div class=\"subian-t2-types\">\n<div class=\"subian-t2-type\">\n<h4>33\/11kV substation<\/h4>\n<p>Steps 33kV down to an 11kV distribution network. Typical for zone substations, regional feeders and plants that run their own 11kV system.<\/p>\n<\/div>\n<div class=\"subian-t2-type\">\n<h4>33\/0.4kV substation<\/h4>\n<p>Feeds 400V\/230V consumers directly from a dedicated 33kV intake, common for commercial and light-industrial sites.<\/p>\n<\/div>\n<div class=\"subian-t2-type\">\n<h4>Ring-fed &amp; terminal types<\/h4>\n<p>Loop or radial connection via ring-main units, with metering, protection and optional telecontrol.<\/p>\n<\/div>\n<\/div>\n<h3 class=\"subian-semv2-acbr-subtitle\">33kV Substation Technical Data<\/h3>\n<div class=\"subian-semv2-acbr-table-wrap\">\n<table class=\"subian-semv2-acbr-specs\">\n<thead>\n<tr>\n<th scope=\"col\">Parameter<\/th>\n<th scope=\"col\">Specification<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Rated HV voltage<\/th>\n<td>33 kV (max. system voltage 36 kV)<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Rated LV voltage<\/th>\n<td>11 kV \/ 0.4 kV<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Transformer rating<\/th>\n<td>50 &#8211; 2,500 kVA per project<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">HV switching<\/th>\n<td>Ring-main unit \/ load-break switch \/ VCB<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">LV switchboard<\/th>\n<td>Fixed or withdrawable, per project<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Enclosure<\/th>\n<td>Weatherproof steel, IP43 &#8211; IP54<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Design standard<\/th>\n<td>IEC 62271-202 \/ GB\/T 17467<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Testing<\/th>\n<td>Routine tests on every unit; type tests per design<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-acbr\" aria-labelledby=\"subian-semv2-acbr-title\">\n<h2 id=\"subian-semv2-acbr-title\" style=\"font-size: 26px; line-height: 1.35;\">33\/11kV, 33\/0.4kV and 132\/33kV &#8211; Which Voltage Level Do You Need?<\/h2>\n<p>Network planners search by these level pairs because they describe where the substation sits in the system. A 132\/33kV substation feeds a 33kV distribution backbone from the transmission or sub-transmission network; a 33\/11kV unit supplies 11kV feeders for urban or industrial areas; and a 33\/0.4kV unit delivers low voltage straight to consumers.<\/p>\n<p>For a project connected at 33kV with downstream loads at 11kV, the single-line diagram typically shows the 33kV incoming bay with an isolator and breaker, a metering VT and CT set, the step-down transformer, and outgoing 11kV breaker panels. When the outgoing side is 0.4kV the same arrangement ends in a low-voltage main board with outgoing feeder breakers.<\/p>\n<p>Tell us the two voltage levels on your diagram &#8211; the rest of the configuration follows from the load and protection requirements.<\/p>\n<\/section>\n<section class=\"subian-semv2-acbr\" aria-labelledby=\"subian-semv2-acbr-title\">\n<h2 id=\"subian-semv2-acbr-title\" style=\"font-size: 26px; line-height: 1.35;\">Buying a 33kV Substation: From Enquiry to Delivery<\/h2>\n<p>Buyers searching locally for a 33kV substation usually work through an electrical contractor, an EPC firm or a utility engineering department. Wherever the project is located, the factory supports those partners with drawings, type-test evidence and commissioning documentation.<\/p>\n<p>The delivery cycle follows our standard cooperation flow: requirement review, technical confirmation, quotation, drawing approval, manufacturing and inspection, then packing and shipment coordination. Single-line diagram and general arrangement drawings are issued for approval before production starts, and a project manager keeps you updated on progress.<\/p>\n<\/section>\n<section class=\"subian-semv2-factory\" aria-labelledby=\"subian-semv2-factory-title\">\n<div class=\"subian-semv2-factory-head\">\n<h2 id=\"subian-semv2-factory-title\" class=\"subian-semv2-factory-title\">How a Compact 33kV Substation Is Manufactured<\/h2>\n<p class=\"subian-semv2-factory-intro\">Enclosure fabrication, transformer production, switchgear wiring and final testing all happen on one site in Xuzhou, so the complete substation is built and checked as a single product.<\/p>\n<\/div>\n<div class=\"subian-semv2-factory-gallery\">\n<div class=\"subian-semv2-factory-item subian-semv2-factory-item--a\"><img decoding=\"async\" class=\"subian-semv2-bg-img\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformer-assembly-process.webp\" alt=\"Production Workshop\" \/><\/p>\n<h3 class=\"subian-semv2-factory-card-title\">Production Workshop<\/h3>\n<p class=\"subian-semv2-factory-card-text\">Transformer assembly and electrical integration move through controlled stations, with quality checkpoints between every stage.<\/p>\n<p><a class=\"subian-semv2-factory-link\" href=\"\/about-us\/\">Learn More \u2192<\/a><\/p>\n<\/div>\n<div class=\"subian-semv2-factory-item subian-semv2-factory-item--b\"><img decoding=\"async\" class=\"subian-semv2-bg-img\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-quality-center.webp\" alt=\"Quality &amp; Testing Center\" \/><\/p>\n<h3 class=\"subian-semv2-factory-card-title\">Quality &amp; Testing Center<\/h3>\n<p class=\"subian-semv2-factory-card-text\">Every unit is inspected before delivery and routine test records are issued with the shipment.<\/p>\n<p><a class=\"subian-semv2-factory-link\" href=\"\/about-us\/\">Learn More \u2192<\/a><\/p>\n<\/div>\n<div class=\"subian-semv2-factory-item subian-semv2-factory-item--c\"><img decoding=\"async\" class=\"subian-semv2-bg-img\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformer-material-process.webp\" alt=\"Materials &amp; Components\" \/><\/p>\n<h3 class=\"subian-semv2-factory-card-title\">Materials &amp; Components<\/h3>\n<p class=\"subian-semv2-factory-card-text\">Core steel, windings, switchgear and accessories are checked against the approved bill of materials.<\/p>\n<p><a class=\"subian-semv2-factory-link\" href=\"\/about-us\/\">Learn More \u2192<\/a><\/p>\n<\/div>\n<div class=\"subian-semv2-factory-item subian-semv2-factory-item--d\"><img decoding=\"async\" class=\"subian-semv2-bg-img\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformer-final-process.webp\" alt=\"Packing &amp; Delivery\" \/><\/p>\n<h3 class=\"subian-semv2-factory-card-title\">Packing &amp; Delivery<\/h3>\n<p class=\"subian-semv2-factory-card-text\">Substations are protected for sea freight, marked and loaded under a coordinated dispatch plan.<\/p>\n<p><a class=\"subian-semv2-factory-link\" href=\"\/about-us\/\">Learn More \u2192<\/a><\/p>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-cta\" aria-labelledby=\"subian-semv2-cta-title\">\n<div class=\"subian-semv2-cta-content\">\n<h2 id=\"subian-semv2-cta-title\">33kV Substation Factory Quote &#8211; Request Pricing<\/h2>\n<p>Tell us the incoming voltage, the transformer rating and the site conditions, and our engineers will prepare the single-line diagram, general arrangement drawing and a factory quotation with lead time for your project.<\/p>\n<div class=\"subian-semv2-cta-actions\"><a class=\"subian-semv2-cta-btn subian-semv2-cta-btn--light\" href=\"\/oem-odm\/\">Get Started \u2192<\/a><br \/>\n<a class=\"subian-semv2-cta-btn subian-semv2-cta-btn--red\" href=\"\/contact-us\/\">Contact Us \u2192<\/a><\/div>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-section\" aria-labelledby=\"subian-semv2-title\">\n<div class=\"subian-semv2-head\">\n<h2 id=\"subian-semv2-title\" class=\"subian-semv2-head-title\">OEM \/ ODM &amp; Wholesale Substation Supply<\/h2>\n<p class=\"subian-semv2-head-intro\">Utilities and distributors can take 33kV substations under their own brand, with custom nameplates, colour, packaging and documentation.<\/p>\n<\/div>\n<div class=\"subian-semv2-grid\">\n<article class=\"subian-semv2-card\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformer-assembly-process.webp\" alt=\"OEM \/ ODM\" \/><\/p>\n<div class=\"subian-semv2-card-body\">\n<div class=\"subian-semv2-card-top\">\n<h3 class=\"subian-semv2-card-title\">OEM \/ ODM<\/h3>\n<p><span class=\"subian-semv2-card-tag\">Factory-Direct<\/span><\/p>\n<\/div>\n<p class=\"subian-semv2-card-desc\">Custom branding, layouts and ratings built on our standard compact-substation platforms.<\/p>\n<hr class=\"subian-semv2-card-line\" \/>\n<p class=\"subian-semv2-card-features\">Factory direct \u00b7 Test docs \u00b7 Export support<\/p>\n<\/div>\n<\/article>\n<article class=\"subian-semv2-card\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformers-production-workshop.webp\" alt=\"Wholesale Supply\" \/><\/p>\n<div class=\"subian-semv2-card-body\">\n<div class=\"subian-semv2-card-top\">\n<h3 class=\"subian-semv2-card-title\">Wholesale Supply<\/h3>\n<p><span class=\"subian-semv2-card-tag\">Volume Pricing<\/span><\/p>\n<\/div>\n<p class=\"subian-semv2-card-desc\">Factory pricing with mixed configurations per order for importers and channel partners.<\/p>\n<hr class=\"subian-semv2-card-line\" \/>\n<p class=\"subian-semv2-card-features\">Factory direct \u00b7 Test docs \u00b7 Export support<\/p>\n<\/div>\n<\/article>\n<article class=\"subian-semv2-card\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-quality-center.webp\" alt=\"Distributor Support\" \/><\/p>\n<div class=\"subian-semv2-card-body\">\n<div class=\"subian-semv2-card-top\">\n<h3 class=\"subian-semv2-card-title\">Distributor Support<\/h3>\n<p><span class=\"subian-semv2-card-tag\">Channel Partners<\/span><\/p>\n<\/div>\n<p class=\"subian-semv2-card-desc\">Drawings, tender documentation and priority production for distributors and EPC clients.<\/p>\n<hr class=\"subian-semv2-card-line\" \/>\n<p class=\"subian-semv2-card-features\">Factory direct \u00b7 Test docs \u00b7 Export support<\/p>\n<\/div>\n<\/article>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-compare\" aria-labelledby=\"subian-semv2-compare-title\">\n<div class=\"subian-semv2-compare-row\">\n<div class=\"subian-semv2-compare-text\">\n<h2 id=\"subian-semv2-compare-title\">Prefabricated vs Site-Built Substations<\/h2>\n<p>A prefabricated 33kV substation concentrates the engineering risk in the factory: components are matched, wired and tested before delivery, and installation on site is reduced to foundation work plus cable and earth connections. A site-built substation offers unlimited layout freedom but requires more civil works, longer programmes and coordination between several trades.<\/p>\n<p>For sites where speed, relocatability or restricted space matters &#8211; distribution zones, industrial plants, mining and temporary supplies &#8211; the compact factory-built unit is usually the practical choice. For very large ratings a conventional yard remains appropriate, and our engineers will confirm which approach fits your project.<\/p>\n<\/div>\n<div class=\"subian-semv2-compare-media\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-quality-center.webp\" alt=\"Product comparison and selection guide\" \/><\/div>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-brands\" aria-labelledby=\"subian-semv2-brands-title\">\n<div class=\"subian-semv2-brands-row\">\n<div class=\"subian-semv2-brands-media\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2026\/08\/subian-electric-transformers-production-workshop.webp\" alt=\"Factory suppliers and manufacturers in China\" \/><\/div>\n<div class=\"subian-semv2-brands-text\">\n<h2 id=\"subian-semv2-brands-title\">Choosing a 33kV Substation Supplier<\/h2>\n<p>Compare suppliers on evidence rather than price alone: ask for the type-test report against IEC 62271-202, the enclosure IP rating and corrosion protection, the brand and ratings of the switchgear installed, and reference deliveries to utilities in your region.<\/p>\n<p>Because the transformer represents most of the substation value, check that the supplier actually manufactures it. Subian controls the transformer, the enclosure and the MV integration at one factory, with ISO9001, ISO14001, ISO45001, CE and UL certification, and a 110 kV transformer type-test report in our documentation set.<\/p>\n<p>Request the single-line diagram and general arrangement drawing with your quotation &#8211; a manufacturer that engineers the unit for your network is a safer partner than one that only resells standard boxes.<\/p>\n<div class=\"hy-lb-btn-wrap\"><a class=\"hy-lb-btn\" href=\"\/contact-us\/\">Get a Quote \u2192<\/a><\/div>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"subian-semv2-cred\" aria-labelledby=\"subian-semv2-cred-title\">\n<div class=\"subian-semv2-cred-head\">\n<h2 id=\"subian-semv2-cred-title\" class=\"subian-semv2-cred-title\">Certifications &amp; Quality Assurance<\/h2>\n<p class=\"subian-semv2-cred-intro\">Our 33kV substation and transformer production is covered by ISO9001, ISO14001 and ISO45001 management systems, CE and UL certification, and type-tested transformer designs that support utility project approval.<\/p>\n<\/div>\n<h3 class=\"subian-semv2-cred-subtitle\">Product Certifications<\/h3>\n<div class=\"swiper subian-ab-cert-swiper\">\n<div class=\"swiper-wrapper\">\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"1 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-10kv-dry-type-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"10 kV Dry-Type Transformer Certificate\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-10kv-dry-type-certificate.webp\" alt=\"10 kV Dry-Type Transformer Certificate\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">10 kV Dry-Type Transformer Certificate<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"2 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-35kv-cb-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"35 kV Transformer CB Certificate\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-35kv-cb-certificate.webp\" alt=\"35 kV Transformer CB Certificate\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">35 kV Transformer CB Certificate<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"3 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-35kv-ce-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"35 kV Transformer CE Verification\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-35kv-ce-certificate.webp\" alt=\"35 kV Transformer CE Verification\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">35 kV Transformer CE Verification<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"4 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ce-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"Transformer CE Certificate\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ce-certificate.webp\" alt=\"Transformer CE Certificate\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">Transformer CE Certificate<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"5 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-cn26i11c-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"Dry-Type Transformer Test Verification\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-cn26i11c-certificate.webp\" alt=\"Dry-Type Transformer Test Verification\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">Dry-Type Transformer Test Verification<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"6 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-14001-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"ISO 14001 Environmental Management\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-14001-certificate.webp\" alt=\"ISO 14001 Environmental Management\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">ISO 14001 Environmental Management<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"7 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-45001-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"ISO 45001 Health &amp; Safety\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-45001-certificate.webp\" alt=\"ISO 45001 Health &amp; Safety\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">ISO 45001 Health &amp; Safety<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"8 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-9001-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"ISO 9001 Quality Management\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-iso-9001-certificate.webp\" alt=\"ISO 9001 Quality Management\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">ISO 9001 Quality Management<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"9 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ssz22-63000-110-nx1-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"110 kV Transformer Type Test Report\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ssz22-63000-110-nx1-certificate.webp\" alt=\"110 kV Transformer Type Test Report\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">110 kV Transformer Type Test Report<\/strong><\/a><\/div>\n<div class=\"swiper-slide\" role=\"group\" aria-label=\"10 \/ 10\"><a class=\"subian-ab-cert glightbox3\" href=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ul-certificate.webp\" data-gallery=\"subian-about-certificates\" data-title=\"UL Certificate of Compliance\"><img loading=\"lazy\" decoding=\"async\" class=\"attachment-large size-large\" src=\"https:\/\/subian-electric.com\/wp-content\/uploads\/2026\/08\/subian-electric-ul-certificate.webp\" alt=\"UL Certificate of Compliance\" width=\"600\" height=\"848\" \/><strong class=\"f18 lh-13\">UL Certificate of Compliance<\/strong><\/a><\/div>\n<\/div>\n<\/div>\n<p>&nbsp;<\/p>\n<\/section>\n<section class=\"subian-related\" style=\"margin: 40px 0;\">\n<div style=\"max-width: 1200px; margin: 0 auto; padding: 0 24px;\">\n<h2 style=\"font-size: 24px; margin-bottom: 12px;\">Related Manufacturer Guides<\/h2>\n<ul style=\"columns: 2; column-gap: 48px; margin: 0; padding-left: 20px; line-height: 2;\">\n<li><a href=\"\/substation-33-11kv\/\">33\/11kV Compact Substation<\/a><\/li>\n<li><a href=\"\/electric-distribution-transformer-manufacturers\/\">Electric Distribution Transformer Manufacturers<\/a><\/li>\n<li><a href=\"\/distribution-transformer-substation-manufacturers\/\">Distribution Transformer Substation Manufacturers<\/a><\/li>\n<li><a href=\"\/330-kva-transformer\/\">330 kVA Transformer<\/a><\/li>\n<li><a href=\"\/about-us\/\">About Our Factory<\/a><\/li>\n<li><a href=\"\/oem-odm\/\">OEM \/ ODM Programs<\/a><\/li>\n<\/ul>\n<\/div>\n<\/section>\n<section class=\"subian-faq-contact\">\n<div class=\"subian-faq-contact__container\">\n<div class=\"subian-faq-contact__grid\">\n<div class=\"subian-faq-contact__left\"><span class=\"subian-faq-contact__eyebrow\">FAQs<\/span><\/p>\n<h2 class=\"subian-faq-contact__title\">33kV Substation Manufacturers &amp; Suppliers FAQ<\/h2>\n<p class=\"subian-faq-contact__intro\">Common questions about 33kV substations, their voltage levels and factory sourcing.<\/p>\n<div class=\"subian-faq\">\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">What is a 33kV substation?<\/summary>\n<div class=\"subian-faq__answer\">It is the installation that transforms power at 33kV down to a lower distribution voltage &#8211; typically 11kV or 0.4kV. In the prefabricated compact form, the 33kV switchgear, the transformer and the low-voltage board are combined in one factory-built enclosure, which shortens on-site work and testing.<\/div>\n<\/details>\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">Is 33kV considered high-voltage?<\/summary>\n<div class=\"subian-faq__answer\">In everyday industry language, anything above 1 kV is often called high voltage, and 33kV certainly demands full HV switchgear practices. Under the stricter IEC classification used in many regions, 33kV falls in the medium-voltage band (roughly 1-36 kV) that covers most distribution networks. Either way it is a level that requires insulated switchgear, qualified operators and careful clearances.<\/div>\n<\/details>\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">How does a 33kV transformer work?<\/summary>\n<div class=\"subian-faq__answer\">It works by electromagnetic induction: an alternating current in the primary winding creates a changing magnetic field in the core, which induces a voltage in the secondary winding. The ratio of turns between the windings decides the step-down ratio &#8211; for example a transformer that changes 33kV to 11kV has a turns ratio of 3:1.<\/div>\n<\/details>\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">What is the purpose of a 33kV isolator in a substation?<\/summary>\n<div class=\"subian-faq__answer\">An isolator (disconnector) provides a visible, safe break in the circuit so maintenance can be carried out on the downstream equipment. It is not designed to break load current &#8211; the breaker opens the circuit first, then the isolator is opened to give a confirmed isolation point before work begins.<\/div>\n<\/details>\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">What is the difference between 33\/11kV and 33\/0.4kV substations?<\/summary>\n<div class=\"subian-faq__answer\">The pair of figures shows the incoming and outgoing voltages. A 33\/11kV substation feeds an 11kV network and suits zone substations, industrial plants and regional feeders. A 33\/0.4kV substation supplies 400V\/230V loads directly and is chosen where a customer takes a dedicated 33kV intake with no intermediate 11kV system.<\/div>\n<\/details>\n<details class=\"subian-faq__item\">\n<summary class=\"subian-faq__question\">How long does a compact 33kV substation take to install?<\/summary>\n<div class=\"subian-faq__answer\">Because the unit is factory-wired and tested, installation is normally a matter of days: preparing the level foundation, lifting the enclosure into place, connecting the MV incoming cable, the LV outgoing cables and the earth, then running the commissioning checks supplied with the unit.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<div class=\"subian-faq-contact__form\">\n<p class=\"subian-faq-contact__form-label\">Contact Subian<\/p>\n<h3 class=\"subian-faq-contact__form-title\">Need the Right Specification?<\/h3>\n<p class=\"subian-faq-contact__form-copy\">Tell us your target market, product type, quantity and technical requirements. Our team will help you identify a suitable configuration for your project.<\/p>\n<div class='fluentform ff-default fluentform_wrapper_1 ffs_default_wrap'><form data-form_id=\"1\" id=\"fluentform_1\" class=\"frm-fluent-form fluent_form_1 ff-el-form-top ff_form_instance_1_1 ff-form-loading ffs_default\" data-form_instance=\"ff_form_instance_1_1\" method=\"POST\" ><fieldset  style=\"border: none!important;margin: 0!important;padding: 0!important;background-color: transparent!important;box-shadow: none!important;outline: none!important; min-inline-size: 100%;\">\n                    <legend class=\"ff_screen_reader_title\" style=\"display: block; margin: 0!important;padding: 0!important;height: 0!important;text-indent: -999999px;width: 0!important;overflow:hidden;\">Contact Form Demo<\/legend>        <div\n                style=\"display: none!important; position: absolute!important; transform: translateX(1000%)!important;\"\n                class=\"ff-el-group ff-hpsf-container\"\n        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required\",\"global\":false,\"global_message\":\"This field is required\"},\"email\":{\"value\":true,\"message\":\"This field must contain a valid email\",\"global\":false,\"global_message\":\"This field must contain a valid email\"}},\"subject\":{\"required\":{\"value\":false,\"message\":\"This field is required\",\"global\":false,\"global_message\":\"This field is required\"}},\"message\":{\"required\":{\"value\":true,\"message\":\"This field is required\",\"global\":false,\"global_message\":\"This field is required\"}}},\"debounce_time\":300,\"file_upload_settings\":[]};\n                            <\/script>\n            \n<div class=\"subian-faq-contact__trust\">Your inquiry is sent directly to our export sales team.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<p><script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is a 33kV substation?\", \"acceptedAnswer\": 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A 33kV substation built here arrives as one tested unit: the incoming 33kV switchgear, the step-down transformer and the low-voltage board are engineered together and assembled under one [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"subian-seo-landing.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-11418","page","type-page","status-publish","hentry"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/pages\/11418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/comments?post=11418"}],"version-history":[{"count":3,"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/pages\/11418\/revisions"}],"predecessor-version":[{"id":11421,"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/pages\/11418\/revisions\/11421"}],"wp:attachment":[{"href":"https:\/\/subian-electric.com\/fr\/wp-json\/wp\/v2\/media?parent=11418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}