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Used Power Transformers

  • 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 21 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

    $543 USD
    Euclid, OH
  • Trusted Seller
    ELECTRICAL TRANSFORMER 129P02/B3 ($35 OBO)

    ELECTRICAL TRANSFORMER 129P02/B3 ($35 OBO)

      “GOOD, FAIR CONDITION” 129P02/B3 220 440 9C 4 WIRES ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery instructions (add...

      $35 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...

      $543 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...

      $543 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
    • Trusted Seller
      ABB T4050PSF1 CONTROL TRANSFORMER ($120

      ABB T4050PSF1 CONTROL TRANSFORMER ($120 OBO)

      • Manufacturer: ABB

      ABB T4050PSF1 CONTROL TRANSFORMER 50 VA 240/480 - 115/24 600V 30A ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. Please provide your delivery ins...

      $120 USD
      Waukesha, WI
    • Trusted Seller
      DONGAN A06-SA6 IGNITION TRANSFORMER ($120

      DONGAN A06-SA6 IGNITION TRANSFORMER ($120 OBO)

      • Manufacturer: Dongan

      “USED, EXCELLENT” DONGAN A06-SA6 IGNITION TRANSFORMER 175 VA 120 VAC PRIMARY 600V SECONDARY 60HZ ***Local deliveries available, simply message us before purchasing so we can properly adjust the listing for you. P...

      $120 USD
      Waukesha, WI
    • Trusted Seller
      EATON C0100ECH INDUSTRIAL CONTROL TRANSFORMER

      EATON C0100ECH INDUSTRIAL CONTROL TRANSFORMER ($170 OBO)

      • Manufacturer: Eaton

      EATON C0100ECH INDUSTRIAL CONTROL TRANSFORMER PRIMARY VOLTAGES; 200/208/220/230/240 VAC SECONDARY VOLTAGE; 220/230 VAC 100VA 50/60HERTZ ***Local deliveries available, simply message us before purchasing so we can...

      $170 USD
      Waukesha, WI
    • Trusted Seller
      HEVI-DUTY HS5F3AS TRANSFORMER ($150 OBO)

      HEVI-DUTY HS5F3AS TRANSFORMER ($150 OBO)

      • Manufacturer: Hevi-Duty
      • Model: HS5F

      “Used, excellent condition” HEVI-DUTY HS5F3AS TRANSFORMER Primary 240/480 V Secondary 120/240 V 60Hz 1 Phase 3 KvA NEMA Type 3R Enclosure ***Local deliveries available, simply message us before purchasing so we c...

      $150 USD
      Waukesha, WI
    • Trusted Seller
      ALLEN BRADLEY 1497-N11 SERIES A

      ALLEN BRADLEY 1497-N11 SERIES A TRANSFORMER ($45 OBO)

      • Manufacturer: Allen-Bradley

      “USED, EXCELLENT” ALLEN BRADLEY 1497-N11 SERIES A TRANSFORMER 0.35 KVA 220/440 VAC PRIMARY 110/120 VAC SECONDARY 50/60 HERTZ ***Local deliveries available, simply message us before purchasing so we can properly a...

      $45 USD
      Waukesha, WI
    • Trusted Seller
      GE 9T51B0190 TRANSFORMER ($100 OBO)

      GE 9T51B0190 TRANSFORMER ($100 OBO)

      • Manufacturer: GE

      “New, worn out box” GE 9T51B0190 TRANSFORMER VA Rating: 1,000 VA Primary Voltage: 277 V Secondary Voltage: 120 V, 240 V ***Local deliveries available, simply message us before purchasing so we can properly adjust...

      $100 USD
      Waukesha, WI
    • RSTN 3000 UL-CSA | Michael

      RSTN 3000 UL-CSA | Michael Riedel Transformer - Used

      • Manufacturer: Michael Riedel

      $282 USD
      Baroda, MI
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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.