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Used Power Transformers

  • Reliance,TR-13402,Transformer

    Reliance,TR-13402,Transformer

    • Manufacturer: Reliance 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 ...

    $76 USD
    Galion, OH
  • Hammond Manufacturing,143838,Transformer

    Hammond Manufacturing,143838,Transformer

    • Manufacturer: Hammond

    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 ...

    $32 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
  • Shape,Z7580,Transformer

    Shape,Z7580,Transformer

    • Manufacturer: Shape

    New in original box 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 with the it...

    $200 USD
    Galion, OH
  • Unknown,TR-16102,Transformer

    Unknown,TR-16102,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 ...

    $28 USD
    Galion, OH
  • EDWARDS,599,TRANSFORMER NOS

    EDWARDS,599,TRANSFORMER NOS

    • 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 ...

    $20 USD
    Galion, OH
  • WESTINGHOUSE,IF4575,TRANSFORMER

    WESTINGHOUSE,IF4575,TRANSFORMER

    • Manufacturer: Westinghouse

    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
  • Dongan,35-M015,120/240V .15KVA Transformer

    Dongan,35-M015,120/240V .15KVA Transformer

    • 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 ...

    $24 USD
    Galion, OH
  • Trusted Seller
    MO-6291, ACME 150 KVA TRANSFORMER.

    MO-6291, ACME 150 KVA TRANSFORMER. 480 HV. 208Y/120 LV. 3 PH. T-1-53316-3S.

    • Manufacturer: Acme

    “Contact us directly for a freight quote or you can setup your own freight. Please provide ship to address. Loading is included with the sale of the item.”

    $1,999 USD
    Willoughby, OH
  • Trusted Seller
    MARELCO POWER SYSTEMS M-7710E /

    MARELCO POWER SYSTEMS M-7710E / CSA-008776-01 20KVA 230V TRANSFORMER

    • Manufacturer: MARELCO POWER SYSTEMS

    The Marelco Power Systems M-7710E / CSA-008776-01 is a used, industrial-grade dry-type transformer designed to deliver reliable voltage transformation in demanding electrical systems. With a 20 kVA capacity and a...

    $3,500 USD
    Detroit, MI
  • Trusted Seller
    MO-6138, GE 9T23B3468G13 K FACTOR

    MO-6138, GE 9T23B3468G13 K FACTOR TRANSFORMER. 300 KVA. 480 HV. 208/120 LV. 3 PH

    • Manufacturer: GE

    “Contact us directly for a freight quote or you can setup your own freight. Please provide ship to address. Loading is included with the sale of the item.”

    $3,999 USD
    Willoughby, OH
  • Trusted Seller
    MO-5971, GE 9T23B3877GE3 TRANSFORMER. 225

    MO-5971, GE 9T23B3877GE3 TRANSFORMER. 225 KVA. 480 HV. 208/120 LV. 3 PH. 60 HZ.

    • Manufacturer: GE

    “Contact us directly for a freight quote or you can setup your own freight. Please provide ship to address. Loading is included with the sale of the item.”

    $2,500 USD
    Willoughby, OH
  • Trusted Seller
    MO-5969, GE 9T23B3876G3 TRANSFORMER. 150

    MO-5969, GE 9T23B3876G3 TRANSFORMER. 150 KVA. 480 HV. 208/120 LV. 3 PH. 60 HZ.

    • Manufacturer: GE

    “Contact us directly for a freight quote or you can setup your own freight. Please provide ship to address. Loading is included with the sale of the item.”

    $1,999 USD
    Willoughby, OH
  • Trusted Seller
    MARELCO POWER SYSTEMS M-7710E /

    MARELCO POWER SYSTEMS M-7710E / CSA-008776-01 20KVA 230V 3PH TRANSFORMER

    • Manufacturer: MARELCO POWER SYSTEMS

    MARELCO POWER SYSTEMS M-7710E Transformer, available in used condition. Perfect for boosting efficiency in your power systems. Reliable manufacturing by trusted brand, ideal for industrial applications. Contact f...

    $2,500 USD
    Detroit, MI
  • 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
89101112

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.