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2025

Used Current Transformer (Ct)

  • Dongan,A06-SA6,Ignition Transformer 120V Primary 6000V

    Dongan,A06-SA6,Ignition Transformer 120V Primary 6000V Secondary

    • Manufacturer: Dongan
    • Model: A06-SA6

    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 make sure the part number(s) m...

    $120 USD
    Galion, OH
  • (3) 50/5 25 KV ASSOCIATED

    (3) 50/5 25 KV ASSOCIATED ENGINEER CURRENT TRANSFORMERS, TYPE BB-25, STYLE 8210 $795 EACH

      Inventory id: 11938900000 | Category: CURRENT TRANSFORMER | Description: (3) CURRENT TRANSFORMERS | Information: ASSOCIATED ENGINERING CURRENT TRANSFORMER/DIVISION OF KUHLMAN CORPORATION

      Pittsburgh, PA
    • EuTrafo Kft,MSZ EN61558-2-4,Transformer

      EuTrafo Kft,MSZ EN61558-2-4,Transformer

      • Manufacturer: EuTrafo Kft

      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...

      $100 USD
      Galion, OH
    • SMC,C4310-003,Sensitive Ground Fault Current Transformer

      SMC,C4310-003,Sensitive Ground Fault Current Transformer

      • Manufacturer: SMC

      Used. Part was pulled from operation upon factory shutdown. This item has been stored in an inventory cabinet since being pulled. Please see pictures for details and condition. You will receive what’s in the pict...

      $40 USD
      Galion, OH
    • WESTINGHOUSE,237A970G02,CURRENT TRANSFORMER

      WESTINGHOUSE,237A970G02,CURRENT TRANSFORMER

      • Manufacturer: Westinghouse

      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
    • Trusted Seller
      Current Transformer CTM 100, 01-2471-40

      Current Transformer CTM 100, 01-2471-40

      • Manufacturer: Unbranded

      Came from working unit 30 day warranty Wr38 Bin2 Mpn: CTM 050 01-2471-30 | Product condition: New without Factory Packaging

      $79 USD
      Muskegon, MI
    • SANGAMO,92350-003,CURRENT TRANSFORMER 400:5A 60HZ

      SANGAMO,92350-003,CURRENT TRANSFORMER 400:5A 60HZ

      • Manufacturer: SANGAMO

      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 ...

      $175 USD
      Galion, OH
    • GENERAL ELECTRIC,9T92A5,SPECIALTY TRANSFORMER NOS

      GENERAL ELECTRIC,9T92A5,SPECIALTY TRANSFORMER NOS

      • 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 ...

      $100 USD
      Galion, OH
    • Cutler Hammer,D60LT2,Current Transformer

      Cutler Hammer,D60LT2,Current Transformer

      • Manufacturer: Cutler-Hammer

      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 ...

      $68 USD
      Galion, OH
    • Cutler-Hammer,D60LT1,Current Transformer

      Cutler-Hammer,D60LT1,Current Transformer

      • Manufacturer: Cutler-Hammer

      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 ...

      $80 USD
      Galion, OH
    • Cutler-Hammer,13542H41A,Current Transformer 600V NOS

      Cutler-Hammer,13542H41A,Current Transformer 600V NOS

      • Manufacturer: Cutler-Hammer

      New, box and part are dirty and aged 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. Plea...

      $40 USD
      Galion, OH
    • Eaton Cutler-Hammer,C1000A3C,Single Phase Transformer

      Eaton Cutler-Hammer,C1000A3C,Single Phase Transformer

      • Manufacturer: Eaton

      Used and in very 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 ...

      $128 USD
      Galion, OH
    • Ohio Semitronics,PC20-006X5X167,Current Transformer

      Ohio Semitronics,PC20-006X5X167,Current Transformer

      • Manufacturer: Ohio Semitronics

      Used in good condition. Part was pulled from operation upon factory shutdown and has been in storage since. Please see pictures for details and condition. You will receive what’s in the pictures. If we have multi...

      $40 USD
      Galion, OH
    • Trusted Seller
      SIGNAL TRANSFORMER 230-25-LPI, 40-150-LPI. 666-345A

      SIGNAL TRANSFORMER 230-25-LPI, 40-150-LPI. 666-345A A PLC

      • Manufacturer: Signal

      Came from working unit 30 day warranty Wr34 Bin2 Primary current rating: 150 A | Secondary current rating: 150 A | Turns ratio: 1

      $350 USD
      Allendale, MI
    • Sola,301587,1-Phase Constant Voltage Transformer 190/380V

      Sola,301587,1-Phase Constant Voltage Transformer 190/380V 2.18A

      • Manufacturer: SOLA

      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
    678910

    Overview

    Current transformers (CTs) convert high alternating currents into a scaled secondary current for meters, relays and protection systems. Available as window, wound or bar types, CTs vary by ratio, accuracy class and saturation behavior. Proper selection focuses on rated primary current, burden, insulation, knee-point for protection use, and condition when buying used for substations, switchgear, or industrial panels.

    FAQ

    What should I check when buying a used CT?

    Verify the nameplate ratio and accuracy class, inspect for physical damage or oil leaks, request recent ratio and insulation test reports, and confirm the CT type (wound/window/bar) and its knee-point if used for protection.

    How should a CT be prepared and shipped safely?

    Drain and seal oil-filled CTs if required, protect bushings and cores, short and ground the secondary terminals, secure the unit to prevent shock, and use a carrier experienced with electrical equipment plus insurance.

    What routine maintenance and tests are essential for CTs?

    Perform visual inspections, insulation resistance tests, ratio and polarity checks, check for oil contamination on liquid-filled units, and schedule periodic accuracy and dielectric tests per manufacturer guidelines.