{"id":2063,"date":"2026-09-17T15:12:53","date_gmt":"2026-09-17T07:12:53","guid":{"rendered":"https:\/\/www.zishengelectric.com\/?post_type=product&p=2063"},"modified":"2026-09-17T15:20:06","modified_gmt":"2026-09-17T07:20:06","slug":"50kva-conventional-type-single-phase-pole-mounted-transformer","status":"publish","type":"product","link":"https:\/\/www.zishengelectric.com\/es\/product\/50kva-conventional-type-single-phase-pole-mounted-transformer","title":{"rendered":"50kVA Conventional Type Single Phase Pole Mounted Transformer"},"content":{"rendered":"

The 50kVA conventional single-phase pole-mounted transformer is designed to step medium-voltage distribution power down to a stable low-voltage supply. It is commonly installed on utility poles for residential communities, rural electrification, farms, small commercial facilities and municipal distribution networks.<\/p>\n

Unlike a CSP transformer, the conventional type normally relies on externally installed primary fuses, surge arresters and secondary protection. Primary voltage, secondary voltage, winding material, insulating fluid, bushings and mounting accessories can be customized for different utility standards.<\/p>\n

Main Technical Specifications<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nStandard Configuration \/ Options<\/th>\n<\/tr>\n<\/thead>\n
Rated Capacity<\/td>\n50kVA<\/td>\n<\/tr>\n
Transformer Type<\/td>\nConventional single-phase pole-mounted transformer<\/td>\n<\/tr>\n
Phase<\/td>\nSingle phase<\/td>\n<\/tr>\n
Primary Voltage<\/td>\n2.4kV\u201334.5kV or customized<\/td>\n<\/tr>\n
Secondary Voltage<\/td>\n120\/240V, 240\/480V, 277V or customized<\/td>\n<\/tr>\n
Rated Frequency<\/td>\n50Hz or 60Hz<\/td>\n<\/tr>\n
Cooling Method<\/td>\nONAN<\/td>\n<\/tr>\n
Winding Material<\/td>\nCopper or aluminum<\/td>\n<\/tr>\n
Core Material<\/td>\nCold-rolled grain-oriented silicon steel<\/td>\n<\/tr>\n
Insulating Fluid<\/td>\nMineral oil or natural ester fluid<\/td>\n<\/tr>\n
Tapping Range<\/td>\nTypically \u00b12 \u00d7 2.5% or customized<\/td>\n<\/tr>\n
Temperature Rise<\/td>\n55\u00b0C, 65\u00b0C or project-specific<\/td>\n<\/tr>\n
Tank Construction<\/td>\nSealed cylindrical steel tank<\/td>\n<\/tr>\n
Primary Bushing<\/td>\nOne- or two-bushing configuration<\/td>\n<\/tr>\n
Secondary Bushings<\/td>\nThree- or four-bushing arrangement<\/td>\n<\/tr>\n
Mounting<\/td>\nSingle-pole mounting brackets<\/td>\n<\/tr>\n
Installation<\/td>\nOutdoor<\/td>\n<\/tr>\n
Standard Altitude<\/td>\nUp to 1,000m; high-altitude design available<\/td>\n<\/tr>\n
Ambient Temperature<\/td>\nAccording to IEEE, CSA, IEC or project requirements<\/td>\n<\/tr>\n
Applicable Standards<\/td>\nIEEE C57, ANSI, CSA, IEC 60076 or specified utility standard<\/td>\n<\/tr>\n
Polarity<\/td>\nAdditive or subtractive according to the approved design<\/td>\n<\/tr>\n
Finish<\/td>\nWeather-resistant coating; custom colour available<\/td>\n<\/tr>\n
Expected Service Life<\/td>\nApproximately 25\u201330 years with correct loading and maintenance<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Typical Voltage Configurations<\/h2>\n

Common primary and secondary voltage combinations include:<\/p>\n

    \n
  • 7.2kV\/120\u2013240V<\/li>\n
  • 7.62kV\/120\u2013240V<\/li>\n
  • 7.97kV\/120\u2013240V<\/li>\n
  • 12.47kV\/120\u2013240V<\/li>\n
  • 13.2kV\/120\u2013240V<\/li>\n
  • 13.8kV\/120\u2013240V<\/li>\n
  • 14.4kV\/120\u2013240V<\/li>\n
  • 24.94kV\/120\u2013240V<\/li>\n
  • 34.5kV\/120\u2013240V<\/li>\n
  • 13.2kV\/240\u2013480V<\/li>\n
  • 13.8kV\/240\u2013480V<\/li>\n
  • Other project-specific voltage ratios<\/li>\n<\/ul>\n

    The primary voltage should be specified as both the system voltage and the actual phase-to-neutral voltage applied to the transformer.<\/p>\n

    Typical Rated Current<\/h2>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Voltage Side<\/th>\nExample Voltage<\/th>\nApproximate Rated Current<\/th>\n<\/tr>\n<\/thead>\n
    Primary<\/td>\n7.2kV<\/td>\n6.94A<\/td>\n<\/tr>\n
    Primary<\/td>\n13.2kV<\/td>\n3.79A<\/td>\n<\/tr>\n
    Primary<\/td>\n14.4kV<\/td>\n3.47A<\/td>\n<\/tr>\n
    Primary<\/td>\n24.94kV<\/td>\n2.00A<\/td>\n<\/tr>\n
    Secondary<\/td>\n240V<\/td>\n208.3A<\/td>\n<\/tr>\n
    Secondary<\/td>\n480V<\/td>\n104.2A<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

    Rated current values are calculated from the full 50kVA capacity and must be confirmed against the approved voltage configuration.<\/em><\/p>\n

    Key Product Features<\/h2>\n

    Compact Pole-Mounted Construction<\/h3>\n

    The cylindrical tank and integrated mounting brackets provide a compact installation footprint. The transformer is suitable for overhead distribution systems where ground space is limited.<\/p>\n

    Low-Loss Magnetic Core<\/h3>\n

    The core uses grain-oriented electrical steel with optimized joints to reduce no-load loss, excitation current, operating noise and vibration.<\/p>\n

    Reliable Winding System<\/h3>\n

    Copper or aluminum conductors can be supplied. The winding structure is mechanically reinforced to withstand short-circuit forces, voltage fluctuations and normal transportation stresses.<\/p>\n

    Oil Insulation and Natural Cooling<\/h3>\n

    The core and coil assembly is immersed in insulating fluid, which provides electrical insulation and transfers heat to the tank wall. ONAN cooling requires no external fans or pumps.<\/p>\n

    Sealed Steel Tank<\/h3>\n

    The sealed tank limits contact between the insulating fluid and outside air, helping reduce moisture ingress, oxidation and maintenance requirements.<\/p>\n

    Outdoor Durability<\/h3>\n

    The transformer can be supplied with:<\/p>\n

      \n
    • UV-resistant exterior coating<\/li>\n
    • Corrosion-resistant hardware<\/li>\n
    • Stainless-steel nameplate<\/li>\n
    • Sealed bushings and gaskets<\/li>\n
    • Coastal or high-humidity protection<\/li>\n
    • Bird guards and wildlife-protection covers<\/li>\n<\/ul>\n

      Conventional Type vs. CSP Type<\/h2>\n
      \n
      \n\n\n\n\n\n\n\n\n\n\n
      Feature<\/th>\nConventional Type<\/th>\nCSP Type<\/th>\n<\/tr>\n<\/thead>\n
      Primary Fuse<\/td>\nNormally installed externally<\/td>\nUsually integrated<\/td>\n<\/tr>\n
      Surge Arrester<\/td>\nNormally installed externally<\/td>\nMay be factory-mounted<\/td>\n<\/tr>\n
      Secondary Breaker<\/td>\nNot normally included<\/td>\nCommonly integrated<\/td>\n<\/tr>\n
      Protection Coordination<\/td>\nDesigned by utility or project engineer<\/td>\nPartially integrated into transformer<\/td>\n<\/tr>\n
      Maintenance<\/td>\nSimple transformer construction<\/td>\nMore integrated components<\/td>\n<\/tr>\n
      Application<\/td>\nFlexible utility protection schemes<\/td>\nStandardized distribution networks<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

      Main Components<\/h2>\n

      A typical 50kVA conventional pole-mounted transformer includes:<\/p>\n

        \n
      • Magnetic core<\/li>\n
      • Primary winding<\/li>\n
      • Secondary winding<\/li>\n
      • Insulating fluid<\/li>\n
      • Cylindrical steel tank<\/li>\n
      • Tank cover and sealing gasket<\/li>\n
      • High-voltage bushing or bushings<\/li>\n
      • Low-voltage bushings<\/li>\n
      • Grounding terminals<\/li>\n
      • Pole-mounting brackets<\/li>\n
      • Lifting lugs<\/li>\n
      • Pressure-relief device<\/li>\n
      • Oil filling plug<\/li>\n
      • Drain or sampling valve, when specified<\/li>\n
      • Stainless-steel nameplate<\/li>\n<\/ul>\n

        Optional Accessories<\/h2>\n

        Available accessories include:<\/p>\n

          \n
        • External surge arrester<\/li>\n
        • Primary fuse cutout<\/li>\n
        • Lightning arrester mounting bracket<\/li>\n
        • Pressure-relief device<\/li>\n
        • Oil-level plug or indicator<\/li>\n
        • Drain and sampling valve<\/li>\n
        • Grounding strap<\/li>\n
        • Wildlife guards<\/li>\n
        • Secondary terminal covers<\/li>\n
        • Tank ground connectors<\/li>\n
        • Copper or tin-plated terminals<\/li>\n
        • Dual-voltage switch<\/li>\n
        • Series-multiple switch<\/li>\n
        • Off-circuit tap changer<\/li>\n
        • Natural ester insulating fluid<\/li>\n
        • Stainless-steel hardware<\/li>\n
        • Special pole-mounting brackets<\/li>\n<\/ul>\n

          Customization Options<\/h2>\n
          \n
          \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
          Customizable Item<\/th>\nAvailable Options<\/th>\n<\/tr>\n<\/thead>\n
          Primary Voltage<\/td>\n2.4kV\u201334.5kV<\/td>\n<\/tr>\n
          Secondary Voltage<\/td>\n120\/240V, 240\/480V, 277V or customized<\/td>\n<\/tr>\n
          Frequency<\/td>\n50Hz or 60Hz<\/td>\n<\/tr>\n
          Winding Material<\/td>\nCopper or aluminum<\/td>\n<\/tr>\n
          Primary Connection<\/td>\nSingle-bushing or dual-bushing<\/td>\n<\/tr>\n
          Secondary Connection<\/td>\nCentre-tapped or project-specific<\/td>\n<\/tr>\n
          Tap Range<\/td>\nStandard or customized off-circuit taps<\/td>\n<\/tr>\n
          Insulating Fluid<\/td>\nMineral oil or natural ester<\/td>\n<\/tr>\n
          Temperature Rise<\/td>\n55\u00b0C or 65\u00b0C<\/td>\n<\/tr>\n
          Efficiency<\/td>\nUtility- or market-specific efficiency level<\/td>\n<\/tr>\n
          BIL<\/td>\nSelected according to the voltage class<\/td>\n<\/tr>\n
          Tank Material<\/td>\nCarbon steel or stainless steel<\/td>\n<\/tr>\n
          Paint Colour<\/td>\nLight grey, green or custom colour<\/td>\n<\/tr>\n
          Corrosion Protection<\/td>\nStandard, coastal or heavy-duty system<\/td>\n<\/tr>\n
          Mounting<\/td>\nStandard or customized pole brackets<\/td>\n<\/tr>\n
          Accessories<\/td>\nArresters, fuse brackets, wildlife guards and terminal covers<\/td>\n<\/tr>\n
          Standards<\/td>\nIEEE\/ANSI, CSA, IEC or customer specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

          Manufacturing Process<\/h2>\n
            \n
          1. Technical requirement review<\/li>\n
          2. Electrical and mechanical design<\/li>\n
          3. Core cutting and assembly<\/li>\n
          4. Primary and secondary winding production<\/li>\n
          5. Core-and-coil assembly<\/li>\n
          6. Insulation drying<\/li>\n
          7. Tank fabrication and surface treatment<\/li>\n
          8. Vacuum oil filling<\/li>\n
          9. Electrical testing<\/li>\n
          10. Leakage and accessory inspection<\/li>\n
          11. Final packing and shipment<\/li>\n<\/ol>\n

            Routine Factory Tests<\/h2>\n

            Each transformer is tested before shipment. Routine tests can include:<\/p>\n

              \n
            • Winding resistance measurement<\/li>\n
            • Voltage-ratio measurement<\/li>\n
            • Polarity verification<\/li>\n
            • No-load loss measurement<\/li>\n
            • No-load current measurement<\/li>\n
            • Load-loss measurement<\/li>\n
            • Impedance measurement<\/li>\n
            • Insulation resistance measurement<\/li>\n
            • Applied voltage withstand test<\/li>\n
            • Induced voltage test<\/li>\n
            • Insulating-fluid dielectric-strength test<\/li>\n
            • Tank leakage test<\/li>\n
            • Visual and dimensional inspection<\/li>\n
            • Nameplate and terminal-marking verification<\/li>\n<\/ul>\n

              Optional Type and Special Tests<\/h2>\n

              When required, the following tests can be arranged:<\/p>\n

                \n
              • Temperature-rise test<\/li>\n
              • Lightning impulse test<\/li>\n
              • Sound-level measurement<\/li>\n
              • Short-circuit withstand verification<\/li>\n
              • Insulating-fluid analysis<\/li>\n
              • Customer-witnessed FAT<\/li>\n
              • Independent third-party inspection<\/li>\n<\/ul>\n

                Applications<\/h2>\n

                The 50kVA conventional single-phase pole-mounted transformer is suitable for:<\/p>\n

                  \n
                • Residential distribution<\/li>\n
                • Rural electrification<\/li>\n
                • Farms and agricultural facilities<\/li>\n
                • Small commercial buildings<\/li>\n
                • Street-lighting systems<\/li>\n
                • Schools and community facilities<\/li>\n
                • Telecommunications equipment<\/li>\n
                • Water-pumping stations<\/li>\n
                • Small workshops<\/li>\n
                • Utility grid-extension projects<\/li>\n
                • Temporary construction power<\/li>\n
                • Remote electrical loads<\/li>\n<\/ul>\n

                  Packing and Shipping<\/h2>\n

                  The transformer is protected for international transportation with:<\/p>\n

                    \n
                  • Reinforced wooden pallet or steel base<\/li>\n
                  • Protected bushings and terminals<\/li>\n
                  • Moisture-resistant wrapping<\/li>\n
                  • Anti-corrosion protection<\/li>\n
                  • Export-standard wooden case when required<\/li>\n
                  • Clear lifting and handling markings<\/li>\n
                  • Separately packed accessories<\/li>\n
                  • Packing list and technical documents<\/li>\n<\/ul>\n

                    Shipment can be arranged by sea, road, railway or multimodal transportation.<\/p>\n

                    Information Required for a Quotation<\/h2>\n

                    Please provide:<\/p>\n

                      \n
                    • Rated capacity: 50kVA<\/li>\n
                    • System voltage<\/li>\n
                    • Primary winding voltage<\/li>\n
                    • Secondary voltage<\/li>\n
                    • Frequency<\/li>\n
                    • Winding material<\/li>\n
                    • Single- or dual-bushing primary connection<\/li>\n
                    • Required BIL<\/li>\n
                    • Tap range<\/li>\n
                    • Insulating-fluid type<\/li>\n
                    • Temperature-rise requirement<\/li>\n
                    • Applicable utility standard<\/li>\n
                    • Required accessories<\/li>\n
                    • Installation altitude<\/li>\n
                    • Ambient temperature<\/li>\n
                    • Quantity<\/li>\n
                    • Destination country<\/li>\n<\/ul>\n

                      Final losses, impedance, BIL, dimensions, weight and accessory configuration are subject to the approved utility specification and manufacturing drawings.<\/em><\/p>","protected":false},"excerpt":{"rendered":"

                      The 50kVA conventional single-phase pole-mounted transformer is designed to step medium-voltage distribution power down to a stable low-voltage supply. It is commonly installed on utility poles for residential communities, rural electrification, farms, small commercial facilities and municipal distribution networks. Unlike a CSP transformer, the conventional type normally relies on externally installed primary fuses, surge arresters […]<\/p>\n","protected":false},"featured_media":2064,"template":"","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false},"product_brand":[],"product_cat":[74],"product_tag":[],"class_list":["post-2063","product","type-product","status-publish","has-post-thumbnail","product_cat-pole-mounted-transformer","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product\/2063","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/media\/2064"}],"wp:attachment":[{"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/media?parent=2063"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_brand?post=2063"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_cat?post=2063"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.zishengelectric.com\/es\/wp-json\/wp\/v2\/product_tag?post=2063"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}