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Used components in Germany

  • Siemens transformer 4AV3095-1AA00 power supply

    Siemens transformer 4AV3095-1AA00 power supply item no. 4008260073

    • Manufacturer: Siemens

    Siemens Transformer 4AV3095-1AA00 Power Supply Item No. 4008260073 Description: Used Siemens transformer with integrated rectifier and smoothing capacitor. The device has been tested, is fully functional, and is ...

    Lennestadt, Germany
  • Siemens 3RB2906 2BG1 Current transformer

    Siemens 3RB2906 2BG1 Current transformer

    • Manufacturer: Siemens

    Siemens 3RB2906-2BG1 current transformer , used, small traces of use, 100% functional, scope of delivery according to photos

    $38 USD
    Remscheid, Germany
  • Siemens 4NC5123 0CE20 Current transformer

    Siemens 4NC5123 0CE20 Current transformer 250/1A 5VA

    • Manufacturer: Siemens

    Siemens 4NC5123-0CE20 Current transformer 250/1A 5VA , unused in opened original packaging, 100% functional, scope of delivery according to photos

    $61 USD
    Remscheid, Germany
  • Siemens 4NC5223 2CE20, current transformer,

    Siemens 4NC5223 2CE20, current transformer,

    • Manufacturer: Siemens

    Siemens 4NC5223-2CE20, current transformer, 250/5A, 5VA Class 1, unused in original packaging, 100% functional, scope of delivery according to photos

    $44 USD
    Remscheid, Germany
  • Siemens 4NC3617 0CE03 Current transformer

    Siemens 4NC3617 0CE03 Current transformer 100 / 1A E Stand 01

    • Manufacturer: Siemens

    Siemens 4NC3617-0CE03 Current transformer 100 / 1A, 50-60Hz, E-Stand 01 , unused in opened original packaging, 100% functional, scope of delivery as per photos

    $13 USD
    Remscheid, Germany

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.