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Used Power Transformers

  • EMB,WH095600305,TRANSFORMER 0.25KVA 380-500V PRI /

    EMB,WH095600305,TRANSFORMER 0.25KVA 380-500V PRI / 230V SEC

    • Manufacturer: EMB

    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
  • Acme Transformer,T-2-53008-S,General Purpose Transformer

    Acme Transformer,T-2-53008-S,General Purpose Transformer

    • Manufacturer: Acme

    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...

    $35 USD
    Galion, OH
  • ACME TRANSFORMER,TA-1-81020,MACHINE TOOL TRANSFORMER 300VA

    ACME TRANSFORMER,TA-1-81020,MACHINE TOOL TRANSFORMER 300VA

    • Manufacturer: Acme

    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
  • EDWARDS,592,TRANSFORMER

    EDWARDS,592,TRANSFORMER

    • Manufacturer: Edwards

    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 ...

    $15 USD
    Galion, OH
  • DONGAN,33-025,TRANSFORMER NOS

    DONGAN,33-025,TRANSFORMER NOS

    • Manufacturer: Dongan

    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 ...

    $45 USD
    Galion, OH
  • DORMEYER,9020,TRANSFORMER

    DORMEYER,9020,TRANSFORMER

    • Manufacturer: DORMEYER

    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
  • Trusted Seller
    75 KVA HAMMOND POWER SOLUTIONS

    75 KVA HAMMOND POWER SOLUTIONS TRANSFORMER. #0312922

    • Manufacturer: Hammond

    MANUFACTURER: HAMMOND POWER SOLUTIONS HV: 480 LV: 240 KVA: 75 COOLING: AA FREQUENCY: 60 HZ IMPEDANCE %: 5.2 WINDING MATERIAL: A1

    Toledo, OH
  • MGM,300KVA 3 Phase Dry Type

    MGM,300KVA 3 Phase Dry Type Transformer HV 2400 LV 208Y/120 60 Hz

    • Manufacturer: MGM

    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 ...

    $4,800 USD
    Galion, OH
  • ACME TRANSFORMER.TA-2-81020,INDUSTRIAL CONTROL TRANSFORMER 300VA

    ACME TRANSFORMER.TA-2-81020,INDUSTRIAL CONTROL TRANSFORMER 300VA

    • Manufacturer: Acme

    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
  • Signal Transformer,150-OF,Transformer 230-115V 50/60Hz

    Signal Transformer,150-OF,Transformer 230-115V 50/60Hz

    • Manufacturer: Signal

    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...

    $45 USD
    Galion, OH
  • Trusted Seller
    75 KVA HAMMOND POWER SOLUTIONS

    75 KVA HAMMOND POWER SOLUTIONS TRANSFORMER. #0313122

    • Manufacturer: Hammond

    MANUFACTURER: HAMMOND POWER SOLUTIONS HV: 480 LV: 240 KVA: 75 COOLING: AA FREQUENCY: 60 HZ IMPEDANCE %: 5.2 WINDING MATERIAL: A1

    Toledo, OH
  • Trusted Seller
    MARELCO POWER SYSTEMS M-22703SE 110KVA

    MARELCO POWER SYSTEMS M-22703SE 110KVA 230V TRANSFORMER

    • Manufacturer: MARELCO POWER SYSTEMS

    MARELCO POWER SYSTEMS M-22703SE used transformer available. Ideal for industrial applications seeking reliable performance from a trusted manufacturer. Contact us for more details.

    $2,200 USD
    Detroit, MI
  • Trusted Seller
    MARELCO POWER SYSTEMS M-7710E 20KVA

    MARELCO POWER SYSTEMS M-7710E 20KVA 230V TRANSFORMER

    • Manufacturer: MARELCO POWER SYSTEMS

    Marelco Power Systems M-7710E used transformer available. Reliable performance and robust design make it a great choice for various industrial applications. Ideal for enhancing electrical efficiency.

    $2,500 USD
    Detroit, MI
  • Acme Transformer,TA-2-81215,Control Transformer 500VA 50/60Hz

    Acme Transformer,TA-2-81215,Control Transformer 500VA 50/60Hz

    • Manufacturer: Acme

    used 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 make s...

    $45 USD
    Galion, OH
  • Stancor,P-6464,Transformer

    Stancor,P-6464,Transformer

    • Manufacturer: Stancor

    New unused with 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...

    $30 USD
    Galion, OH
34567

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.