{"id":14039,"date":"2026-07-02T11:33:06","date_gmt":"2026-07-02T03:33:06","guid":{"rendered":"https:\/\/vicopower.com\/?post_type=product&p=14039"},"modified":"2026-09-23T21:53:42","modified_gmt":"2026-09-23T13:53:42","slug":"product-8","status":"publish","type":"product","link":"https:\/\/vicopower.com\/index.php\/product\/product-8\/","title":{"rendered":"Oil Immersed Transformer \u2013 Three-Phase Distribution Transformer 10kV\/35kV"},"content":{"rendered":"

Product Overview<\/h3>\n

The oil-immersed distribution transformer is the backbone of medium-voltage power distribution. Windings and core are immersed in high-grade insulating oil inside a sealed corrugated tank, which provides electrical insulation, efficient cooling and protection against environmental factors. The result is a rugged, dependable transformer with excellent overload capacity and decades of trouble-free operation.<\/p>\n

Available in a wide range of capacities from 50kVA to 2500kVA and primary voltages from 6kV to 35kV, our transformers are engineered to IEC 60076 and GB 1094 standards, with performance verified by full type tests.<\/p>\n

Construction<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n
Component<\/th>\nMaterial \/ Design<\/th>\nFunction<\/th>\n<\/tr>\n<\/thead>\n
Core<\/td>\nHigh-grade grain-oriented silicon steel (amorphous alloy optional)<\/td>\nLow-loss magnetic circuit<\/td>\n<\/tr>\n
Windings<\/td>\nHigh-conductivity copper or aluminum, layer or foil wound<\/td>\nReliable electrical circuit<\/td>\n<\/tr>\n
Tank<\/td>\nFully sealed corrugated steel tank<\/td>\nEfficient heat dissipation, low oil temperature rise<\/td>\n<\/tr>\n
Insulating Oil<\/td>\nMineral oil (vegetable \/ silicone oil optional)<\/td>\nInsulation and cooling<\/td>\n<\/tr>\n
Bushings<\/td>\nPorcelain or composite, HV and LV<\/td>\nSafe cable and busbar connection<\/td>\n<\/tr>\n
Accessories<\/td>\nOil level gauge, pressure relief valve, drain\/sampling valve, nameplate, thermometers<\/td>\nMonitoring and maintenance<\/td>\n<\/tr>\n
Tapping Switch<\/td>\nOff-circuit, \u00b12\u00d72.5% (5 steps)<\/td>\nVoltage adjustment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Key Features<\/h3>\n
    \n
  • Low losses, high efficiency<\/strong> \u2013 Grain-oriented silicon steel core and optimized winding design minimize no-load and load losses.<\/li>\n
  • Excellent cooling<\/strong> \u2013 Corrugated tank with ONAN cooling provides large radiating surface, keeping oil temperature rise low and extending insulation life.<\/li>\n
  • High overload capacity<\/strong> \u2013 Oil-immersed construction tolerates temporary overloads better than dry-type designs.<\/li>\n
  • Reliable insulation<\/strong> \u2013 High-grade insulating oil provides superior dielectric strength and protects windings from moisture and contamination.<\/li>\n
  • Hermetically sealed design<\/strong> \u2013 Prevents oil oxidation and moisture ingress, reducing maintenance to almost zero.<\/li>\n
  • Wide rating range<\/strong> \u2013 50kVA to 2500kVA (larger power transformers on request), primary 6kV\u201335kV, secondary 0.4kV and other voltages.<\/li>\n
  • Flexible configuration<\/strong> \u2013 Copper or aluminum windings, vector groups (Dyn11 \/ Yyn0), mineral or eco-friendly vegetable oil options.<\/li>\n
  • Full safety accessories<\/strong> \u2013 Oil level gauge, pressure relief valve, temperature indicator and drain valve as standard.<\/li>\n
  • Standards compliance<\/strong> \u2013 Designed and type-tested to IEC 60076, GB 1094, IEEE and other international standards.<\/li>\n<\/ul>\n

    Technical Specifications<\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Parameter<\/th>\nTypical Range<\/th>\n<\/tr>\n<\/thead>\n
    Rated Capacity<\/td>\n50kVA \u2013 2500kVA (customizable)<\/td>\n<\/tr>\n
    Rated Primary Voltage<\/td>\n6kV \/ 10kV \/ 11kV \/ 20kV \/ 33kV \/ 35kV<\/td>\n<\/tr>\n
    Rated Secondary Voltage<\/td>\n0.4kV (and other voltages on request)<\/td>\n<\/tr>\n
    Frequency<\/td>\n50 \/ 60 Hz<\/td>\n<\/tr>\n
    Cooling Method<\/td>\nONAN (ONAF optional)<\/td>\n<\/tr>\n
    Vector Group<\/td>\nDyn11 \/ Yyn0 (or as specified)<\/td>\n<\/tr>\n
    Impedance Voltage<\/td>\n4% \u2013 6% (per rating)<\/td>\n<\/tr>\n
    Tapping Range<\/td>\n\u00b12\u00d72.5% (off-circuit, 5 steps)<\/td>\n<\/tr>\n
    Core Material<\/td>\nSilicon steel (amorphous alloy optional)<\/td>\n<\/tr>\n
    Winding Material<\/td>\nCopper or aluminum<\/td>\n<\/tr>\n
    Insulating Oil<\/td>\nMineral oil (vegetable \/ silicone oil optional)<\/td>\n<\/tr>\n
    Standards<\/td>\nIEC 60076; GB 1094; IEEE (on request)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Note: exact ratings, dimensions and weights vary by capacity and voltage \u2014 please provide your project parameters for a detailed technical datasheet.<\/em><\/p>\n

    Applications<\/h3>\n
      \n
    • Distribution networks (urban and rural)<\/li>\n
    • Industrial plants and commercial substations<\/li>\n
    • Renewable energy stations (solar, wind)<\/li>\n
    • Utility power distribution and metering<\/li>\n
    • Mining and infrastructure projects<\/li>\n
    • Export \/ containerized substation projects<\/li>\n<\/ul>\n

      Why Choose Our Oil Immersed Transformer<\/h3>\n
        \n
      • Proven reliability<\/strong> \u2013 Sealed, low-maintenance design with decades of service life in demanding environments.<\/li>\n
      • Energy-efficient<\/strong> \u2013 Low-loss core and winding designs reduce lifetime operating cost.<\/li>\n
      • Full customization<\/strong> \u2013 Capacity, voltage, vector group, oil type, accessories and painting customized to your specification.<\/li>\n
      • Complete quality assurance<\/strong> \u2013 Full type tests per IEC 60076 with test reports available on request.<\/li>\n
      • One-stop supply<\/strong> \u2013 Transformers, accessories and matching LV\/MV switchgear supplied together.<\/li>\n<\/ul>\n

        Installation & Maintenance<\/h3>\n
          \n
        1. Transport upright and protect bushings and accessories from impact; check oil level and any leakage upon arrival.<\/li>\n
        2. Install on a firm foundation with adequate clearance for cooling; connect HV\/LV bushings with proper torque per the drawing.<\/li>\n
        3. Before energizing, verify the tap position, vector group and earthing; perform the routine insulation checks specified in the manual.<\/li>\n
        4. Maintenance is minimal: periodic visual inspection of oil level, pressure relief valve and bushings. Oil sampling every 1\u20133 years is recommended.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

          Our oil-immersed distribution transformer is a three-phase, hermetically sealed unit designed for reliable power distribution in utility and industrial networks. Available from 50kVA to 2500kVA with primary voltages up to 35kV and ONAN cooling, it features a corrugated tank for efficient heat dissipation, high-quality silicon steel core, and copper or aluminum windings. Manufactured and tested to IEC 60076 and GB 1094, it delivers low losses, long service life and minimal maintenance \u2014 the trusted choice for distribution substations, industrial plants and renewable energy projects.<\/p>\n","protected":false},"featured_media":14300,"comment_status":"open","ping_status":"closed","template":"","meta":{"_angie_page":false},"product_brand":[],"product_cat":[42],"product_tag":[],"class_list":{"0":"post-14039","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-mens","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/product\/14039","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/comments?post=14039"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/media\/14300"}],"wp:attachment":[{"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/media?parent=14039"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=14039"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=14039"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/vicopower.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=14039"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}