Energy » Transformers » Current Transformer (CT) » Beijing

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Used electronics and controls in Beijing, China

  • GF1060 Laboratory Current Transformer Test

    GF1060 Laboratory Current Transformer Test System

      The GF1060 current transformer test system is suitable for the calibration of traditional electromagnetic current transformers and electronic current transformers with small voltage output. The GF1060 current tra...

      Beijing, China
    • TEST-200 200A portable primary current

      TEST-200 200A portable primary current injection test kit

        TEST-200 200A primary current injection test kit adopts 32bit ARM chip to control its output process and large capacity of toroidal transformers. It is equipped with current meter; It can show primary current val...

        Beijing, China
      • TEST-901 large current 1000a primary

        TEST-901 large current 1000a primary current injection test set

          TEST-901 primary current injection test set adopts 32bit ARM chip to control its output process and large capacity of toroidal transformers. It is equipped with LCD display and current meter; it can show primary ...

          Beijing, 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.