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Used Power Transformers

  • WEM,BV24855,TRANSFORMER 115/220V 50/60HZ

    WEM,BV24855,TRANSFORMER 115/220V 50/60HZ

    • Manufacturer: WEM

    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 ...

    $40 USD
    Galion, OH
  • NSD Corporation,3.1H-4.0 H,Transformer Chokecoil

    NSD Corporation,3.1H-4.0 H,Transformer Chokecoil

    • Manufacturer: NSD Corporation

    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 ...

    $40 USD
    Galion, OH
  • Square D,9070T5200D1,Industrial Control Transformer

    Square D,9070T5200D1,Industrial Control Transformer

    • Manufacturer: Square D

    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
  • Allen Bradley,1497-N11,Control Circuit Transformer NOS

    Allen Bradley,1497-N11,Control Circuit Transformer NOS

    • Manufacturer: Allen-Bradley

    New, box is extremely 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...

    $76 USD
    Galion, OH
  • Harnischfeger,75Z542D1,.300KVA Transformer

    Harnischfeger,75Z542D1,.300KVA Transformer

    • Manufacturer: Harnischfeger

    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
  • GE,9T58K1803,Core & Coil Transformer

    GE,9T58K1803,Core & Coil 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 ...

    $200 USD
    Galion, OH
  • Teknik,ENL20052/V4 555 698,24V Transformer

    Teknik,ENL20052/V4 555 698,24V Transformer

    • Manufacturer: Teknik

    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 ...

    $85 USD
    Galion, OH
  • NUNOME ELECTRIC,L32929,TRANSFORMER 100VA NOS

    NUNOME ELECTRIC,L32929,TRANSFORMER 100VA NOS

    • Manufacturer: NUNOME ELECTRIC

    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
  • Emerson,HS1F500B,General Purpose Transformer

    Emerson,HS1F500B,General Purpose Transformer

    • Manufacturer: Emerson

    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 ...

    $84 USD
    Galion, OH
  • SWALLOW,SCT-1000,TRANSFORMER 1000VA 50/60HZ

    SWALLOW,SCT-1000,TRANSFORMER 1000VA 50/60HZ

    • Manufacturer: SWALLOW

    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
  • FERN,N-050E,INDUSTRIAL CONTROL TRANSFORMER .050KVA

    FERN,N-050E,INDUSTRIAL CONTROL TRANSFORMER .050KVA

    • Manufacturer: FERN

    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 ...

    $40 USD
    Galion, OH
  • GS,Y750,HEAVY DUTY CONTROL CIRCUIT TRANSFORMER

    GS,Y750,HEAVY DUTY CONTROL CIRCUIT TRANSFORMER 750 KVA NOS

    • Manufacturer: Sola/Hevi-Duty

    New without original 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...

    $56 USD
    Galion, OH
  • Marelco,M-10822S,7.5kVA Transformer 44A724699.004

    Marelco,M-10822S,7.5kVA Transformer 44A724699.004

    • Manufacturer: Marelco

    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...

    $224 USD
    Galion, OH
  • EMERSON SOLA,E300,CONTROL TRANSFORMER .300KVA NEW

    EMERSON SOLA,E300,CONTROL TRANSFORMER .300KVA NEW

    • Manufacturer: Emerson

    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 ...

    $100 USD
    Galion, OH
  • Dongan,83-20-1515,Transformer 20Kva 480V 3Phase

    Dongan,83-20-1515,Transformer 20Kva 480V 3Phase

    • Manufacturer: Dongan

    New unused older stock. We will arrange shipping with the buyer. The weight is 375Lbs and the measurements are 28"x28"x24". Please see pictures for details and condition. You will receive what’s in the pictures. ...

    $700 USD
    Galion, OH
1819202122

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.