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Used P & H Power Transformers

  • P&H Harnischfeger,75Q323D1,Transformer Factory Sealed

    P&H Harnischfeger,75Q323D1,Transformer Factory Sealed

    • Manufacturer: P & H

    New in original box. Box is dirty from storage. 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 revie...

    $120 USD
    Galion, OH
  • P&H,75Q331D1,240/480V Control Transformer

    P&H,75Q331D1,240/480V Control Transformer

    • Manufacturer: P & H

    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 ...

    $52 USD
    Galion, OH
  • P&H,75Q319D1,TRANSFORMER 250VA NOS

    P&H,75Q319D1,TRANSFORMER 250VA NOS

    • Manufacturer: P & H

    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 ...

    $150 USD
    Galion, OH
  • P&H,75Z653-D3,TRANSFORMER .055KVA NOS

    P&H,75Z653-D3,TRANSFORMER .055KVA NOS

    • Manufacturer: P & H

    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 ...

    $50 USD
    Galion, OH
  • P&H,75Q314D1,Control Transformer 300VA 50/60HZ

    P&H,75Q314D1,Control Transformer 300VA 50/60HZ

    • Manufacturer: P & H

    New unused 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 pictu...

    $300 USD
    Galion, OH
  • P&H,75Q330D1,INDUSTRIAL CONTROL TRANSFORMER 300VA 50/60HZ

    P&H,75Q330D1,INDUSTRIAL CONTROL TRANSFORMER 300VA 50/60HZ NOS

    • Manufacturer: P & H

    New, box is dirty and distressed 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 r...

    $400 USD
    Galion, OH
  • P&H,75Q315D1,Control Circuit Transformer 500VA 50/60HZ

    P&H,75Q315D1,Control Circuit Transformer 500VA 50/60HZ

    • Manufacturer: P & H

    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...

    $250 USD
    Galion, OH
  • P&H,75Z273-D1,CONTROL CIRCUIT TRANSFORMER 3KVA 220/440V

    P&H,75Z273-D1,CONTROL CIRCUIT TRANSFORMER 3KVA 220/440V PRI 90/110/130/180V SEC

    • Manufacturer: P & H

    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 ...

    $75 USD
    Galion, OH

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.