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Used generator in Poland

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    2003 Moeller GA 3K

    2003 Moeller GA 3K

    • Manufacturer: Klöckner Moeller

    SF6 gas-insulated 10 kV block switchgear type GA3K, rated short-circuit current 20 kA - Supplier: Moeller (F&G) - Year of manufacture 2003 - Dimensions (WxDxH) 1380 mm x 700 mm x 1400 mm - Weight approx. : 500 kg...

    Bialogard, Poland
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  • Siemens 4AM5742-5AT10-0FA0, isolation transformer 1

    Siemens 4AM5742-5AT10-0FA0, isolation transformer 1 kVA 400V to 230V .de

    • Manufacturer: Siemens
    • Model: 4AM5742

    Siemens 4AM5742-5AT10-0FA0, transformer 1.0 kVA 400 V to 230 V Description in German Monophase Siemens transformer for voltage adjustment and supply of control and auxiliary circuits. Converts a three-stage selec...

    Bialogard, Poland
  • SIEMENS 4AM6591-0EB50-1N Transformer 2.2 kVA

    SIEMENS 4AM6591-0EB50-1N Transformer 2.2 kVA PRI 400V SEC 230V .de

    • Manufacturer: Siemens

    SIEMENS 4AM6591-0EB50-1N Transformer 2.2 kVA PRI 400V SEC 230V Description in German The Siemens control transformer (transformer station) 4AM6591-0EB50-1N is used to safely provide the required secondary voltage...

    Bialogard, Poland

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.