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Used Power Transformers

  • 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
  • Trusted Seller
    MO-6292, GE 9T23B3876 TRANSFORMER. 150

    MO-6292, GE 9T23B3876 TRANSFORMER. 150 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.”

    $1,999 USD
    Willoughby, OH
  • Trusted Seller
    MO-6041, GE 9T23B3876 TRANSFORMER. 150

    MO-6041, GE 9T23B3876 TRANSFORMER. 150 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.”

    $1,999 USD
    Willoughby, OH
  • Trusted Seller
    MO-5965, SQUARE D 225T3HIS TRANSFORMER.

    MO-5965, SQUARE D 225T3HIS TRANSFORMER. 225 KVA. 480 HV. 208Y/120 LV. 3 PH.

    • Manufacturer: Square D

    “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-5672, MITSUBISHI AV-DN TRANSFORMER. 15

    MO-5672, MITSUBISHI AV-DN TRANSFORMER. 15 KVA. 3 PH. 402/201 HV. 210 LV. 50/60HZ

    • Manufacturer: Mitsubishi

    “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.”

    $299 USD
    Willoughby, OH
  • Trusted Seller
    MO-3602, CHALLENGER DT-3 TRANSFORMER. 34

    MO-3602, CHALLENGER DT-3 TRANSFORMER. 34 KVA. 460 HV. 460Y/266 LV. 342-LP3T.

    • Manufacturer: Challenger

    “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.”

    $299 USD
    Willoughby, OH
  • Trusted Seller
    POWERTRAN 3PTN40-75K 480V 75KVA TRANSFORMER

    POWERTRAN 3PTN40-75K 480V 75KVA TRANSFORMER WITH DISCONNECT SWITCH

    • Manufacturer: POWERTRAN

    POWERTRAN 3PTN40-75K general-purpose transformer available. Ideal for diverse applications. Used condition from a reliable manufacturer, perfect for those seeking trusted performance. Specification Table

    $1,500 USD
    Detroit, MI
  • Trusted Seller
    Hammond Power Solutions – Q005PEKF

    Hammond Power Solutions – Q005PEKF Transformer 600V – 120/240V, 5 kVA

    • Manufacturer: Hammond

    Hammond Power Solutions Q005PEKF transformer available, used condition. Ideal for various electrical applications. Renowned manufacturer Hammond Power Solutions ensures reliable performance. Perfect for those in ...

    $725 USD
    Detroit, MI
  • Gass,BV 17590,Transformer

    Gass,BV 17590,Transformer

    • Manufacturer: Gass

    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 ...

    $44 USD
    Galion, OH
  • Koehlke,7385,Variable Transformer

    Koehlke,7385,Variable Transformer

    • Manufacturer: Koehlke

    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...

    $250 USD
    Galion, OH
  • Industrial MRO,19647,Transformer

    Industrial MRO,19647,Transformer

    • Manufacturer: Industrial MRO

    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...

    $120 USD
    Galion, OH
  • Unbranded,TR13195,Transformer

    Unbranded,TR13195,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 ...

    $100 USD
    Galion, OH
  • BASLER ELECTRIC,22703001,TRANSFORMER

    BASLER ELECTRIC,22703001,TRANSFORMER

    • Manufacturer: Basler

    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
  • EIA,682-9223,Transformer

    EIA,682-9223,Transformer

    • Manufacturer: EIA

    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
    MO-6410, GE 9T23B3874 TRANSFORMER. 75

    MO-6410, GE 9T23B3874 TRANSFORMER. 75 KVA. 3 PH. 480 HV. 208/120 LV. 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.”

    $1,250 USD
    Willoughby, OH
678910

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.