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Used Current Transformer (Ct) in Alabama, USA

  • Up Unipo 8BER8040 Transformer

    Up Unipo 8BER8040 Transformer

    • Manufacturer: Up Unipo

    Up Unipo 8BER8040 Transformer pulled from working instrument. #'s on transformer: 8BER8040 Primaer 1 | 110 V- 110 V | gn- tr- bn Primaer 2 | 110 V- 110 V | gn- tr- bn Sekundaer | 40 V, 2A | rt- rt T115C ...

    $60 USD
    Fayette, AL
  • Sola 23-22-112 Constant Voltage Transformer

    Sola 23-22-112 Constant Voltage Transformer Type CVS-1

    • Manufacturer: SOLA

    Sola 23-22-112 Constant Voltage Transformer Type CVS-1. Unit is in good physical condition overall, power cord is cut (see pictures). Not tested as power cord is cut. ALL OFFERS AND QUESTIONS WELCOME! #'s on unit...

    $80 USD
    Fayette, AL
  • Micron B100MBT13RK Series 2 100VA

    Micron B100MBT13RK Series 2 100VA Control Transformer

    • Manufacturer: Micron

    Micron B100MBT13RK Series 2 100VA Control Transformer. Unit is used in good condition, pulled from a working system (see pictures, comes as shown). Info on unit: Micron Control Transformers ImperviTRAN 100VA | 50...

    $119 USD
    Fayette, AL
  • Trusted Seller
    Cummins OTPCA-6464618

    Cummins OTPCA-6464618

    • Manufacturer: Cummins

    Manufacturer: Cummins Used Cummins OTCPA-6464618 125 amp transfer switch for sale.

    $900 USD
    Tuscaloosa, AL

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.