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Used Power Transformers

  • 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
    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
  • Trusted Seller
    Jefferson Electric 411-0131-000 Dry Type

    Jefferson Electric 411-0131-000 Dry Type Power Transformer 7.5KVA 1 Phase 60Hz

    • Manufacturer: Jefferson Electric

    High Voltage: 240/480, Low Voltage: 120/240 PLEASE REVIEW: We would ask that potential buyers please view the photographs carefully, and understand what you are buying. Please ask any questions you have PRIOR to ...

    $400 USD
    Suwanee, GA
  • Murr Electronik Transformer, #86153, Same

    Murr Electronik Transformer, #86153, Same Day Shipping, LG-2068

    • Manufacturer: Murrelektronik

    LG-2068 Feel free to ask any questions Please see pictures for more information and item conditions.Please feel free to ask any questions We are always looking for new and used industrial items so please let me k...

    $399 USD
    Hamilton, MI
  • 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
      ACME Transformer DTGB0934S 93KVA ($4,500

      ACME Transformer DTGB0934S 93KVA ($4,500 OBO)

      • Manufacturer: Acme

      “Used, very good condition; REFURBISHED 2025.” CATALOG NO - DTGB0934S 93 KVA 60 HZ 3 PHASE WEIGHT - 693lbs Local deliveries available, simply message us before purchasing so we can properly adjust the listing for...

      $4,500 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...

      $434 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): 25 x 24 x 21 | Capacity: 9.8 KVA | Electrical: 1/50/60/240 | Weight (lb.): 150 | Available quantity...

      $434 USD
      Euclid, OH
    • 23100017 | Transat LC-100 Final

      23100017 | Transat LC-100 Final Plater Filament Transformer - New

      • Manufacturer: Transat

      $256 USD
      Baroda, MI
    • 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
      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
    3637383940

    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.