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Used Power Transformers

  • Daykin Electric,LTFS-07,Transformer Disconnect 500VA 460V

    Daykin Electric,LTFS-07,Transformer Disconnect 500VA 460V 1.08A

    • Manufacturer: Daykin Electric

    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...

    $80 USD
    Galion, OH
  • Trusted Seller
    ABB Power T&D Company 234C117

    ABB Power T&D Company 234C117 Transformer bushing 15kV 2000A

    • Manufacturer: ABB

    New old stock surplus item from spare parts storage. Has some shelf wear. If this item ships as Flat Rate Freight please see details in Shipping tab

    $1,850 USD
    Millersburg, IN
  • Basler,TRR00475,Transformer 75VA 120/208/240/480V NOS

    Basler,TRR00475,Transformer 75VA 120/208/240/480V NOS

    • Manufacturer: Basler

    New, box is 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 the pictu...

    $36 USD
    Galion, OH
  • GENERAL ELECTRIC,9T58B0503G30,INDUSTRIAL CONTROL TRANSFORMER

    GENERAL ELECTRIC,9T58B0503G30,INDUSTRIAL CONTROL 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 ...

    $30 USD
    Galion, OH
  • Dongan Transformers ADL-250 Transformer Lighting

    Dongan Transformers ADL-250 Transformer Lighting Disconnect Enclosure 1-Phase

    • Manufacturer: Dongan

    “Used item as seen in the images. No additional items are included in the sale. 30-day warranty included.” Dongan Transformers ADL-250 Transformer Lighting Disconnect 1-Ph NO TRANSFORMER 4-AA7-93377-JL-ZN

    $810 USD
    Baroda, MI
  • Dongan Transformers ADL-230 Transformer Lighting

    Dongan Transformers ADL-230 Transformer Lighting Disconnect Enclosure 1-Phase

    • Manufacturer: Dongan

    “Used item as seen in the images. No additional items are included in the sale. 30-day warranty included.” Dongan Transformers ADL-230 Transformer Lighting Disconnect Enclosure 1-Phase 4-Z7-93379-JL-ZN

    $810 USD
    Baroda, MI
  • EMERSON,E300,CONTROL TRANSFORMER .300KVA 240X480-120V NOS

    EMERSON,E300,CONTROL TRANSFORMER .300KVA 240X480-120V NOS

    • 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 ...

    $95 USD
    Galion, OH
  • SQUARE D,9070T50D1,CONTROL TRANSFORMER 0.05KVA

    SQUARE D,9070T50D1,CONTROL TRANSFORMER 0.05KVA

    • Manufacturer: Square D
    • Model: 9070T50D1

    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
  • SQUARE D,9070T150D13,CONTROL TRANSFORMER 0.15KVA

    SQUARE D,9070T150D13,CONTROL TRANSFORMER 0.15KVA

    • 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 ...

    $30 USD
    Galion, OH
  • FUKUDA,FE21-500,TRANSFORMER PHASE 1 500VA PRE-OWNED

    FUKUDA,FE21-500,TRANSFORMER PHASE 1 500VA PRE-OWNED

    • Manufacturer: FUKUDA

    FUKUDA,FE21-500,TRANSFORMER PHASE 1 500VA PRE-OWNED 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...

    $60 USD
    Galion, OH
  • JOSLYN CLARK,KTR672,TRANSFORMER 45VA 240/480 VOLT

    JOSLYN CLARK,KTR672,TRANSFORMER 45VA 240/480 VOLT .045 KVA NOS

    • Manufacturer: Clark

    JOSLYN CLARK,KTR672,TRANSFORMER 45VA 240/480 VOLT .045 KVA 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 t...

    $335 USD
    Galion, OH
  • Trusted Seller
    MO-3619, GE 9T21B1028 G4 TRANSFORMER.

    MO-3619, GE 9T21B1028 G4 TRANSFORMER. 5 KVA. 3 PH. 60 HZ. 120/240 HV. 208 LV. QM

    • 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.”

    $150 USD
    Willoughby, OH
  • AUTOMATIC SWITCH CO.,106A203,TRANSFORMER CONT. DUTY

    AUTOMATIC SWITCH CO.,106A203,TRANSFORMER CONT. DUTY 125V DC PRE-OWNED

    • Manufacturer: AUTOMATIC SWITCH

    AUTOMATIC SWITCH CO.,106A203,TRANSFORMER CONT. DUTY 125V DC PRE-OWNED 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 p...

    $225 USD
    Galion, OH
  • General Electric,9T56Y2922,Transformer 50/60CY 0.050KVA

    General Electric,9T56Y2922,Transformer 50/60CY 0.050KVA

    • Manufacturer: GE

    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...

    $120 USD
    Galion, OH
  • GE,9T58B53,Transformer 1.5 KVA 60 Hz

    GE,9T58B53,Transformer 1.5 KVA 60 Hz 1 Ph

    • 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 ...

    $60 USD
    Galion, OH
2324252627

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.