Energy » Transformers » Current Transformer (CT) » Chongqing

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Used roller in Chongqing, China

  • ACP Portable Electrical Current Transformer

    ACP Portable Electrical Current Transformer Test,CT/PT Analyzer

      ACP portable current transformer test kit designed for analyzing current transformers and voltage transformers of protection or measurement use, which is suitable for laboratory and on-site test. Application:ACP ...

      Chongqing, China
    • Transformer Oil Automatic Dielectric Loss

      Transformer Oil Automatic Dielectric Loss Angle Tester Volume Resistivity Test Set

      • Manufacturer: Gold

      Transformer Oil Automatic Dielectric Loss Angle Tester Volume Resistivity Test Set Product Features Light weight, small size, test safe operation, a complex dual-use, portable integrated structure. With all-digit...

      $2,800 USD
      Chongqing, China
    • Three Phase Z Type Transformer

      Three Phase Z Type Transformer Turn Ratio Tester TTR

      • Manufacturer: Gold

      Turns Ratio Range 0.8-10000 Three Phase Z Type Transformer Turn Ratio Tester Introduction: GDB-D 3 Phase Transformer Turn Ratio Tester is specially designed for three phase transformer in power system, especially...

      Chongqing, China
    • High Precision Transformer Winding Resistance

      High Precision Transformer Winding Resistance Tester DC Resistance Test Set

      • Manufacturer: Gold

      High Precision Transformer Winding Resistance Tester DC Resistance Test Set Brief introduction This tester is the newest product for transformer DC resistance test; it can test the resistance of the three-phase w...

      $2,000 USD
      Chongqing, 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.