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Used applied in 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
  • Gdzc-10A DC Resistance Tester Transformer

    Gdzc-10A DC Resistance Tester Transformer Winding Resistance Tester

    • Manufacturer: Gold

    GDZC-10A DC Resistance Tester Transformer Winding Resistance Tester Introduction: GDZC-10A DC Resistance Tester Transformer Winding Resistance Tester 1.GDZC-10A DC Resistance Tester Transformer Winding Resistance...

    Chongqing, China
  • 10A DC Current Transformer Winding

    10A DC Current Transformer Winding Resistance Tester for Transformer Coil

    • Manufacturer: Gold

    10A DC Current Transformer Winding Resistance Tester for Transformer Coil I. Introduction GDZC-10 10A DC Current Winding Resistance Tester for Transformer Coil is applied to measure the DC resistance of inductanc...

    $1,500 USD
    Chongqing, China
  • Gdbc-901 Automatic Transformer Transformation Turns

    Gdbc-901 Automatic Transformer Transformation Turns Ratio Tester TTR Megger

    • Manufacturer: Gold

    GDBC-901 Automatic Transformer Transformation Turns Ratio Tester Megger Product Description 1. GDBC-901 Automatic Transformer Transformation Turns Ratio Tester Megger is designed according IEC76-1 and IEC60044. 2...

    $1,400 USD
    Chongqing, China
  • Gdbc-901 Automatic Three Phase Transformer

    Gdbc-901 Automatic Three Phase Transformer Turns Ratio Tester TTR Meter

    • Manufacturer: Gold

    GDBC-901 Automatic Three Phase Transformer Turns Ratio Tester TTR Meter 1) GDBC-901 Three Phase Transformer Turns Ratio TTR Tester is designed according IEC76-1 and IEC60044. 2) GDBC-901 Three Phase Transformer T...

    Chongqing, China
  • Automatic TTR Three Phase Transformer

    Automatic TTR Three Phase Transformer Turn Ratio Tester

    • Manufacturer: Gold

    GDBC-901 Automatic TTR Three Phase Transformer Turn Ratio Tester I ntroduction: GDBC-901 Automatic TTR Transformer Turn Ratio Tester is designed according IEC76-1 and IEC60044. GDBC-901 Automatic TTR Transformer ...

    Chongqing, China
  • Gdbc-901 Three Phase/Single Phase TTR

    Gdbc-901 Three Phase/Single Phase TTR Transformer Turns Ratio Meter for Power Testing

    • Manufacturer: CHONGQING GOLD

    GDBC-901 Three Phase/Single Phase TTR Transformer Turns Ratio Meter for Power testing I. Introduction 1. GDBC-901 Transformer Turns Ratio Meter or called Transformer Turns Ratio Meter is designed according IEC76-...

    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.