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Used Power Transformers

  • 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
  • Tamura,3FD-536,Transformer 130B

    Tamura,3FD-536,Transformer 130B

    • Manufacturer: Tamura

    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...

    $14 USD
    Galion, OH
  • DONGAN,53-05,TRANSFORMER 50 VA NOS

    DONGAN,53-05,TRANSFORMER 50 VA NOS

    • Manufacturer: Dongan

    DONGAN,53-05,TRANSFORMER 50 VA 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 included ...

    $60 USD
    Galion, OH
  • SQUARE D,15T3H,TRANSFORMER 15KVA TRANSFORMER H.V.

    SQUARE D,15T3H,TRANSFORMER 15KVA TRANSFORMER H.V. 480 L.V. 208Y/120V

    • Manufacturer: Square D
    • Model: 15T3H

    WILL ARRANGE SHIPPING WITH BUYER WEIGHT 210 MEASURING 24X24X28 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 t...

    $450 USD
    Galion, OH
  • SQUARE D,30T3H,TRANSFORMER 30KVA TRANSFORMER H.V.

    SQUARE D,30T3H,TRANSFORMER 30KVA TRANSFORMER H.V. 480 L.V. 208Y/120V

    • Manufacturer: Square D

    WILL ARRANGE SHIPPING WITH BUYER WEIGHT 280LBS MEASURING 28X28X30 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 photo...

    $550 USD
    Galion, OH
  • STANCOR,P-6375,CONTROL TRANSFORMER 1-PHASE NOS

    STANCOR,P-6375,CONTROL TRANSFORMER 1-PHASE NOS

    • Manufacturer: Stancor

    STANCOR,P-6375,CONTROL TRANSFORMER 1-PHASE 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 ...

    $45 USD
    Galion, OH
  • General Electric,9T97Y558,Transformer

    General Electric,9T97Y558,Transformer

    • Manufacturer: GE

    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 make sure the part number(s) m...

    $200 USD
    Galion, OH
  • General Electric,9T53Y3517,Transformer

    General Electric,9T53Y3517,Transformer

    • Manufacturer: GE

    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 make sure the part number(s) m...

    $140 USD
    Galion, OH
  • Fanuc,A80L-001-0176-04,Transformer

    Fanuc,A80L-001-0176-04,Transformer

    • Manufacturer: Fanuc

    New unused stock surplus, see pictures for details

    $260 USD
    Galion, OH
  • Square D,SK5271R,Transformer Disconnect Series A

    Square D,SK5271R,Transformer Disconnect Series A

    • Manufacturer: Square D

    New unused no box, 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 pictures to make su...

    $144 USD
    Galion, OH
  • SBA,Type DWD Art Nr 204-026,Transformer

    SBA,Type DWD Art Nr 204-026,Transformer

    • Manufacturer: SBA

    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...

    $80 USD
    Galion, OH
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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.