Energy » Transformers » Current Transformer (CT) » Shanghai

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Used unit in Shanghai, China

  • Trusted Seller
    Silicon Steel Sheet EI Lamination

    Silicon Steel Sheet EI Lamination Stacking Machine Low Frequency Transformer

    • Manufacturer: LIANGUI

    Silicon steel sheet insertion and stacking machine flexible production of low-frequency transformer chip inserting machi Product parameter: Input: 220VAC~240VAC 50~60Hz Output: 60VAC 24VDC Features: ① It saves ma...

    Shanghai, China
  • Trusted Seller
    Semi Automatic Inserting Machine For

    Semi Automatic Inserting Machine For EI Sheet Transformer

    • Manufacturer: LIANGUI

    Semi-automatic inserting machine for EI sheet of low frequency transformer Product parameter: Input: 220VAC~240VAC 50~60Hz Output: 60VAC 24VDC Features: ① It saves manpower and reduces the labor intensity of the ...

    Shanghai, China
  • Transformer (Transformer)

    Transformer (Transformer)

      ※ Product Overview Dry Isolation Transformer , with moisture resistance, easy maintenance and other advantages, can deeply reach the load center, suitable for power transmission and distribution sites such as sub...

      Shanghai, China

    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.