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Used Current Transformer (Ct)

  • Cutler-Hammer,13542H9B,Current Transformer 600V Max 6.2-38A

    Cutler-Hammer,13542H9B,Current Transformer 600V Max 6.2-38A

    • Manufacturer: Cutler-Hammer

    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...

    $30 USD
    Galion, OH
  • General Electric,Type JKM-3,Current Transformer 497x35

    General Electric,Type JKM-3,Current Transformer 497x35 Ratio 400:5

    • Manufacturer: GE

    Refurbished 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 picture...

    $250 USD
    Galion, OH
  • HAMMOND,A1-TRC-Q0C-288,TRANSFORMER 1000VA 50/60HZ

    HAMMOND,A1-TRC-Q0C-288,TRANSFORMER 1000VA 50/60HZ

    • Manufacturer: Hammond

    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 ...

    $120 USD
    Galion, OH
  • General Electric,Type JKM-3,Current Transformer 497x29

    General Electric,Type JKM-3,Current Transformer 497x29 Ratio 100:5

    • Manufacturer: GE

    Refurbished 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 picture...

    $250 USD
    Galion, OH
  • GENERAL ELECTRIC WESCHLER,9T92A28,VARIABLE TRANSFORMER 120V

    GENERAL ELECTRIC WESCHLER,9T92A28,VARIABLE TRANSFORMER 120V 1PH

    • 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
  • MIDWEST ELECTRIC,6CT11-B,CURRENT TRANSFORMER

    MIDWEST ELECTRIC,6CT11-B,CURRENT TRANSFORMER

    • Manufacturer: Midwest Electric

    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 ...

    $60 USD
    Galion, OH
  • C & B,MANUFACTURING,60CY,CURRENT TRANSFORMER 50%/5.

    C & B,MANUFACTURING,60CY,CURRENT TRANSFORMER 50%/5. PRIMARY TURNS 1 LOT OF 2

    • Manufacturer: C & B MANUFACTURING

    C & B,MANUFACTURING,60CY,CURRENT TRANSFORMER 50%/5. PRIMARY TURNS 1 LOT OF 2 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 i...

    $35 USD
    Galion, OH
  • CUTLER HAMMER,C0100A2F,TRANSFORMER .100KVA 230X460V NOS

    CUTLER HAMMER,C0100A2F,TRANSFORMER .100KVA 230X460V NOS

    • 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 ...

    $55 USD
    Galion, OH
  • FANUC,A80L-0001-0454-03,LINE REACTOR TRANSFORMER 3.5KVA NEW

    FANUC,A80L-0001-0454-03,LINE REACTOR TRANSFORMER 3.5KVA NEW

    • Manufacturer: Fanuc

    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 ...

    $1,000 USD
    Galion, OH
  • RAM METER,5RBT-601,CURRENT TRANSFORMER 600:5 RATIO

    RAM METER,5RBT-601,CURRENT TRANSFORMER 600:5 RATIO 50-400HZ 600V

    • Manufacturer: RAM METER

    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 ...

    $10 USD
    Galion, OH
  • Reliance Electric,64670-6-R,Current Transformer Ratio: 600V

    Reliance Electric,64670-6-R,Current Transformer Ratio: 600V 1VA 50/60CY

    • Manufacturer: Reliance Electric

    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...

    $20 USD
    Galion, OH
  • Trusted Seller
    Sola 63-28-275-8 Constant Current Power

    Sola 63-28-275-8 Constant Current Power Transformer 7.5kw 7500VA Single Phase

    • Manufacturer: Sola

    Used, in Good Working Condition. Removed From a Working Environment. This is a power conditioner transformer. Input 175-235/190-260/380-520V Output 120/208/240V Single phase. 7.5kw If this item ships as Flat Rate...

    $2,250 USD
    Millersburg, IN
  • Trusted Seller
    E.I.L Current Transformer 100:5

    E.I.L Current Transformer 100:5

    • Manufacturer: E.I.L

    All parts ordered before 3:30 pm (EST) typically ship same day via UPS, FedEx, or USPS! If the order is placed after 3:30 pm and you still would like it send out same day, feel free to reach out to us and we will...

    $60 USD
    Muskegon, MI
  • TOYO KEIKI,JIS C1731,CURRENT TRANSFORMER TYPE

    TOYO KEIKI,JIS C1731,CURRENT TRANSFORMER TYPE COM-5/20 50/60HZ MISSING BOX

    • Manufacturer: Toyo

    TOYO KEIKI,JIS C1731,CURRENT TRANSFORMER TYPE COM-5/20 50/60HZ MISSING BOX 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 ...

    $60 USD
    Galion, OH
  • ETI,CZ-372SP,TRANSFORMER PR420-480V-600V SEC 400VY 3PH

    ETI,CZ-372SP,TRANSFORMER PR420-480V-600V SEC 400VY 3PH 350A

    • Manufacturer: ETI

    WILL ARRANGE SHIPPING WITH BUYER WEIGHT 330LBS MEASURING 24X24X23 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 photo...

    $550 USD
    Galion, OH
89101112

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.