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Used Power Transformers

  • Trusted Seller
    HAMMOND POWER SOLUTIONS – NMK015PKCN

    HAMMOND POWER SOLUTIONS – NMK015PKCN Transformer 600V – 480Y/277V, 15kVA

    • Manufacturer: Hammond

    HAMMOND POWER SOLUTIONS NMK015PKCN Transformer available. Rated at 15kVA, this used general purpose transformer operates at 600V – 480Y/277V. Ideal for various industrial applications. Cat No. NMK015PKCN Pri. Vol...

    $350 USD
    Detroit, MI
  • RELIANCE ELECTRIC,64670-11S,TRANSFORMER NOS

    RELIANCE ELECTRIC,64670-11S,TRANSFORMER NOS

    • Manufacturer: Reliance Electric

    RELIANCE ELECTRIC,64670-11S,TRANSFORMER NOS What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be ...

    $60 USD
    Galion, OH
  • Acme,ET-83327,Transformer 500VA NOS

    Acme,ET-83327,Transformer 500VA NOS

    • Manufacturer: Acme

    New, box is dirty from storage. NOS. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictu...

    $50 USD
    Galion, OH
  • Trusted Seller
    POWERTRAN 3PTN43-75K-E2 75kVA 3PH Dry-Type

    POWERTRAN 3PTN43-75K-E2 75kVA 3PH Dry-Type Transformer

      This listing is for a USED POWERTRAN 3PTN43-75K-E2 Dry-Type Transformer. It is designed for stepping down or isolating electrical power in industrial applications. This unit is categorized as a Dry-Type Transform...

      $3,500 USD
      Detroit, MI
    • RELIANCE ELECTRIC,64670-15R,TRANSFORMER NOS

      RELIANCE ELECTRIC,64670-15R,TRANSFORMER NOS

      • Manufacturer: Reliance Electric

      RELIANCE ELECTRIC,64670-15R,TRANSFORMER NOS What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be ...

      $50 USD
      Galion, OH
    • UNBRANDED,G5AX-1012-1,TRANSFORMER

      UNBRANDED,G5AX-1012-1,TRANSFORMER

      • Manufacturer: Unbranded

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $30 USD
      Galion, OH
    • Unbranded,7.0432.7092.0.W,Transformer

      Unbranded,7.0432.7092.0.W,Transformer

      • Manufacturer: Unbranded

      Used and in good condition. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the pictures to ma...

      $120 USD
      Galion, OH
    • General Signal,E850,Transformer .850KVA

      General Signal,E850,Transformer .850KVA

      • Manufacturer: General Signal

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $60 USD
      Galion, OH
    • General Electric,15G7429,Ballast Transformer

      General Electric,15G7429,Ballast Transformer

      • Manufacturer: GE

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $36 USD
      Galion, OH
    • Unknown,10701-01E,Transformer 605 0349

      Unknown,10701-01E,Transformer 605 0349

      • Manufacturer: Unbranded

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $28 USD
      Galion, OH
    • DONGAN,35-Y005,TRANSFORMER .050 KVA

      DONGAN,35-Y005,TRANSFORMER .050 KVA

      • Manufacturer: Dongan

      New, dirty and has rust from storage. NOS Please see pictures for details and condition. You will receive what’s in the pictures. If we have multiples of the same item, the pictures may differ. Please review the ...

      $30 USD
      Galion, OH
    • Hevi-Duty,T500,Transformer .500KVA

      Hevi-Duty,T500,Transformer .500KVA

      • Manufacturer: Hevi-Duty

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $11 USD
      Galion, OH
    • Shape Electronics,SR130-Z1651,Transformer

      Shape Electronics,SR130-Z1651,Transformer

      • Manufacturer: Shape Electronics

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $24 USD
      Galion, OH
    • EDS,T-294,TRANSFORMER 120V NOS

      EDS,T-294,TRANSFORMER 120V NOS

      • Manufacturer: EDS

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $20 USD
      Galion, OH
    • MG Electronics,MGT1640,Transformer Class 2

      MG Electronics,MGT1640,Transformer Class 2

      • Manufacturer: MG Electronics

      What's Included? See photos. We try our best to provide full details of each item and any included accessories, but if it's not shown in the photos then it will not be included with the item. 30-Day Easy Returns ...

      $8 USD
      Galion, OH
    7891011

    Overview

    Power transformers transfer electrical energy between voltage levels for utilities, substations, and large industrial plants. These heavy, high-capacity units come in oil-filled or dry-type designs, with cooling classes (ONAN, ONAF, etc.), on-load tap changers, bushings and protection gear. Buyers must match voltage class, impedance, capacity (kVA/MVA), and cooling to system needs, and plan for foundation, handling, transport and commissioning.

    FAQ

    What specifications should I check when buying a used power transformer?

    Confirm voltage ratios, kVA/MVA rating, impedance, cooling type, phase configuration, on-load tap changer condition, bushing types and insulation class, and recent test reports (DGA, insulation resistance, turns ratio).

    How do I verify a used transformer's condition before purchase?

    Request factory and maintenance records, Dissolved Gas Analysis (DGA), insulation resistance, power factor tests, sweep-frequency response (SFRA) and a visual inspection report for leaks, rust and bushing integrity.

    What are the key shipping considerations for heavy power transformers?

    Plan for specialized heavy-haul transport, load lifting equipment, route permits, weight/axle limits, skidding or cradling, draining oil if required by regulations, and coordination with local authorities for oversized loads.

    What site preparations are needed before delivery and installation?

    Prepare a level, rated foundation or skid with proper anchoring, ensure crane access and pad capacity, verify cable entry, grounding, oil containment for liquid-filled units, and arrange for qualified rigging and electrical commissioning crews.

    What ongoing maintenance keeps a power transformer reliable?

    Perform regular DGA, insulation resistance and oil quality tests, thermographic inspections, tap changer maintenance, bushing checks, cooling system inspections and timely repairs. Follow manufacturer intervals and keep detailed service records.