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Used Power Transformers

  • Trusted Seller
    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER

    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER ($85 OBO)

    • Manufacturer: ELTRA TRANSFORMATOREN

    ELTRA TRANSFORMATOREN GDC 0.13 TRANSFORMER 230 VAC 24 V ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions ...

    $85 USD
    Waukesha, WI
  • Trusted Seller
    Powerstat 9.8 Kva Variable Autotransformer

    Powerstat 9.8 Kva Variable Autotransformer - 1296d

    • Manufacturer: Powerstat

    Used, Made In The Usa Name: Variable Autotransformer | Arrival date: 10-02-2025 | Dimensions l x w x h (inches): 25 x 24 x 21 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $679 USD
    Euclid, OH
  • Trusted Seller
    CHUO ELECTRIC BKO-R8548 TRANSFORMER ($100

    CHUO ELECTRIC BKO-R8548 TRANSFORMER ($100 OBO)

    • Manufacturer: Chuo Electric

    “Used, good condition” CHUO ELECTRIC BKO-R8548 TRANSFORMER ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructio...

    $100 USD
    Waukesha, WI
  • Trusted Seller
    EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER

    EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER ($40 OBO)

    • Manufacturer: EGS

    “USED, EXCELLENT” EGS E1803PB INDUSTRIAL CONTROL TRANSFORMER 50/60 HERTZ .180 KV 105 INSULATION CLASS TYPE EP3B ***Local deliveries available, simply message us before purchasing so we can properly adjust the lis...

    $40 USD
    Waukesha, WI
  • Trusted Seller
    ALLEN BRADLEY 1497-N8 SERIES A

    ALLEN BRADLEY 1497-N8 SERIES A TRANSFORMER ($50 OBO)

    • Manufacturer: Allen-Bradley

    “USED, EXCELLENT” ALLEN BRADLEY 1497-N8 SERIES A TRANSFORMER 250 VA 220/440 - 240/480VAC PRIMARY 50/60 HERTZ 100/120 VAC SECONDARY ***Local deliveries available, simply message us before purchasing so we can prop...

    $50 USD
    Waukesha, WI
  • Nunome NET 6930 DTP2 Dry-Type

    Nunome NET 6930 DTP2 Dry-Type Transformer 6.93k

    • Manufacturer: Nunome Electric Co.

    “Clean used item as seen in the images. Includes 30 day warranty. The tabs on the Fuji breakers have broken off as seen in image 4” Nunome NET 6930 DTP2 Dry-Type Transformer 6.93k 0-D53B-17501-GX This item is lis...

    $675 USD
    Baroda, MI
  • Trusted Seller
    Powerstat 9.8 Kva Variable Autotransformer

    Powerstat 9.8 Kva Variable Autotransformer - 1296d

    • Manufacturer: Powerstat

    Used, Made In The Usa Name: Variable Autotransformer | Arrival date: 10-02-2025 | Dimensions l x w x h (inches): 25 x 24 x 21 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $679 USD
    Euclid, OH
  • Trusted Seller
    ALLEN BRADLEY 1497-N46PA TRANSFORMER ($70

    ALLEN BRADLEY 1497-N46PA TRANSFORMER ($70 OBO)

    • Manufacturer: Allen-Bradley

    “USED, EXCELLENT” ALLEN BRADLEY 1497-N46PA TRANSFORMER 60 HERTZ 240/480 PRIMARY VOLTAGE 24 SECONDARY VOLTAGE ***Local deliveries available, simply message us before purchasing so we can properly adjust the listin...

    $70 USD
    Waukesha, WI
  • Trusted Seller
    TOYOZUMI UEE0058-033016-04S TRANSFORMER ($175 OBO)

    TOYOZUMI UEE0058-033016-04S TRANSFORMER ($175 OBO)

    • Manufacturer: TOYOZUMI

    “USED, EXCELLENT” TOYOZUMI UEE0058-033016-04S TRANSFORMER 200/220 VOLTS PRIMARY 115 VOLTS SECONDARY 5 AMPS 575 VA 50/60 HZ ***Local deliveries available, simply message us before purchasing so we can properly adj...

    $175 USD
    Waukesha, WI
  • Trusted Seller
    ALLEN BRADLEY 1497-N16 CONTROL TRANSFORMER

    ALLEN BRADLEY 1497-N16 CONTROL TRANSFORMER ($90 OBO)

    • Manufacturer: Allen-Bradley

    “USED, EXCELLENT” ALLEN BRADLEY 1497-N16 CONTROL TRANSFORMER .130 KVA SN TYPE 220/440V - 240/480V 50/60 HERTZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listi...

    $90 USD
    Waukesha, WI
  • RSTN 3000 UL-CSA | Michael

    RSTN 3000 UL-CSA | Michael Riedel Transformer - Used

    • Manufacturer: Michael Riedel

    $282 USD
    Baroda, MI
  • Trusted Seller
    GE 9T51Y130 TRANSFORMER ($100 OBO)

    GE 9T51Y130 TRANSFORMER ($100 OBO)

    • Manufacturer: GE

    “Used, good condition” GE 9T51Y130 TRANSFORMER dry-type power transformer ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your deli...

    $100 USD
    Waukesha, WI
  • Trusted Seller
    Powerstat 9.8 Kva Variable Autotransformer

    Powerstat 9.8 Kva Variable Autotransformer - 1296d

    • Manufacturer: Powerstat

    Used, Made In The Usa Name: Variable Autotransformer | Arrival date: 10-02-2025 | Dimensions l x w x h (inches): 25 x 24 x 23 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $679 USD
    Euclid, OH
  • Trusted Seller
    Powerstat 9.8 Kva Variable Autotransformer

    Powerstat 9.8 Kva Variable Autotransformer - 1296d

    • Manufacturer: Powerstat

    Used, Made In The Usa Name: Variable Autotransformer | Arrival date: 10-02-2025 | Dimensions l x w x h (inches): 28 x 24 x 26 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $679 USD
    Euclid, OH
  • Trusted Seller
    Marelco M-18663E 28kVA Transformer ($1600

    Marelco M-18663E 28kVA Transformer ($1600 OBO)

    • Manufacturer: Marelco

    “Used, very good condition.” PT NO. M-18663E 28 kVA 60Hz 3 PH Marelco Power Systems Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide yo...

    $1,600 USD
    Waukesha, WI
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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.