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Used Current Transformer (Ct)

  • GENERAL ELECTRIC,631X23,CURRENT TRANSFORMER

    GENERAL ELECTRIC,631X23,CURRENT 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 ...

    $45 USD
    Galion, OH
  • GENERAL ELECTRIC,JGH-0,CURRENT TRANSFORMER

    GENERAL ELECTRIC,JGH-0,CURRENT 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 ...

    $35 USD
    Galion, OH
  • Trusted Seller
    GENERAL ELECTRIC 139C4970G39 4000 AMP

    GENERAL ELECTRIC 139C4970G39 4000 AMP CURRENT TRANSFORMER NNB

    • Manufacturer: GE

    The General Electric 139C4970G39 is a 4000 Amp current transformer (CT) designed for precise current measurement and protection in industrial and commercial electrical systems. This used unit is ideal for applica...

    $300 USD
    Detroit, MI
  • Toyo Keiki,JIS C1731,Current Transformer

    Toyo Keiki,JIS C1731,Current Transformer

    • Manufacturer: Toyo

    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 ...

    $24 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
  • 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
  • (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
    • 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
    • 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 ...

      $40 USD
      Galion, OH
    • Advance,71A65F3-T,Transformer Ballast

      Advance,71A65F3-T,Transformer Ballast

      • Manufacturer: Advance

      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 ...

      $28 USD
      Galion, OH
    • 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
    • Trusted Seller
      Instrument Transformers Inc. 143-750 Current

      Instrument Transformers Inc. 143-750 Current Transformer 75:5 A. RF 1.33 Used

      • Manufacturer: Instrument Transformers, Inc.

      Instrument Transformers Inc. Current Transformer Ratio: 75:5 A.

      $300 USD
      Belgium, WI
    • Trusted Seller
      Instrument Transformers Inc. 590-750 Current

      Instrument Transformers Inc. 590-750 Current Transformer 75:5 A. RF 1.33 Used

      • Manufacturer: Instrument Transformers, Inc.

      Instrument Transformers Inc. Current Transformer Ratio: 75:5 A. ACC C25

      $1,000 USD
      Belgium, WI
    • 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
    45678

    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.