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Used same in Ohio, USA

  • GENERAL ELECTRIC,631X28,CURRENT TRANSFORMER

    GENERAL ELECTRIC,631X28,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 ...

    $25 USD
    Galion, OH
  • WESTON,605,CURRENT TRANSFORMER NOS

    WESTON,605,CURRENT TRANSFORMER NOS

    • Manufacturer: Weston

    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 ...

    $25 USD
    Galion, OH
  • SIMPSON,1305,CURRENT TRANSFORMER NOS

    SIMPSON,1305,CURRENT TRANSFORMER NOS

    • Manufacturer: Simpson

    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 ...

    $25 USD
    Galion, OH
  • WICC,A500L24,CURRENT TRANSFORMER .6KV

    WICC,A500L24,CURRENT TRANSFORMER .6KV

    • Manufacturer: WICC

    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 ...

    $15 USD
    Galion, OH
  • GENERAL ELECTRIC,55-172809G,CONTROL TRANSFORMER 2-1/2A PRE-OWNED

    GENERAL ELECTRIC,55-172809G,CONTROL TRANSFORMER 2-1/2A PRE-OWNED

    • Manufacturer: GE

    GENERAL ELECTRIC,55-172809G,CONTROL TRANSFORMER 2-1/2A PRE-OWNED 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...

    $45 USD
    Galion, OH
  • WESTINGHOUSE,CSB-10,CURRENT TRANSFORMER

    WESTINGHOUSE,CSB-10,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 ...

    $55 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
  • ALLEN-BRADLEY,1497-N27,SERIES A CONTROL CIRCUIT TRANSFORMER

    ALLEN-BRADLEY,1497-N27,SERIES A CONTROL CIRCUIT TRANSFORMER X-183182 110/120V

    • Manufacturer: Allen-Bradley

    ALLEN-BRADLEY,1497-N27,SERIES A CONTROL CIRCUIT TRANSFORMER X-183182 110/120V 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 ...

    $70 USD
    Galion, OH
  • HUNTERDON TRANSFORMER,TTC-22520-1,REACTOR 1PH FREQ 60/300

    HUNTERDON TRANSFORMER,TTC-22520-1,REACTOR 1PH FREQ 60/300 IND 0.118H CURRENT 17A

    • Manufacturer: HUNTERDON TRANSFORMER

    NEW STILL IN ORIGINAL BOX WILL ARRANGE SHIPPING WITH BUYER WEIGHT 240LBS MEASURING 25"X32"X30" What's Included? See photos. We try our best to provide full details of each item and any included accessories, but i...

    $1,800 USD
    Galion, OH
  • NK Technologies,ATP1-420-120-FF,Fixed Core AC Current

    NK Technologies,ATP1-420-120-FF,Fixed Core AC Current Transformer

    • Manufacturer: NK Technologies

    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 ...

    $295 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
  • Midwest,6CT1158,Current Transformer 150/5 Ratio 25-400

    Midwest,6CT1158,Current Transformer 150/5 Ratio 25-400 Cycles

    • 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 ...

    $68 USD
    Galion, OH
  • Westinghouse,655C285H03,Transformer Coil 300:5A

    Westinghouse,655C285H03,Transformer Coil 300:5A

    • 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 ...

    $75 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
  • 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
34567

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.