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GDHG-201B CT/PT Analyzer

For following current CT test:

  • Excitation characteristic test
  • Turn ratio detection
  • Ratio error and angular difference calibration
  • Polarity calibration
  • Secondary winding resistance measurement
  • Secondary load measurement
  • 5% and 10% deviation curve measurement
  • CT transient characteristics test and analysis
  • Automatically detects CT nameplates
  • Inflection point voltage/current, accuracy limit factor, safety factor, second time constants, residual magnetism factor, accuracy class, saturated and unsaturated inductance, inflexion electromotive force, limiting e.m.f. and area factor etc.
  • Current transformer iron core hysteresis loop measurement.

And following voltage PT test:

  • PT Turn ratio and phase angle difference detection.
  • PT polarity calibration
  • PT secondary winding resistance measurement
  • Secondary load measurement


  • CT nameplates parameters calibration
  • Calibrating parameters when CT connect to current load.
  • Analyzing relay protection device according to the CT transient characteristics.
  • PT nameplates parameters calibration.
  • PT secondary load calibration.


  • Input power supply: AC220V±10%50Hz/60Hz±10%
  • Output voltage: 0.1~180V(AC)
  • Output current: 0.001~5A(RMS)
  • Output power: 500VA
  • Maximum equivalent inflection voltage: 45KV
  • Current measuring range: 0~10A (Auto range 0.1/0.4/2/10A) Deviation:<±0.1%+0.01%FS
  • Current measuring range:0~200 V (Auto range 1/10/70/200V) Deviation< ±0.1%+0.01%FS
  • Turns Ratio measuring range: 1~35000; 1~2000 Deviation<0.05% ; 2000~5000 Deviation<0.1% ; 5000~35000 Deviation<0.2%

Phase measurement:

  • Precision±2min
  • Resolution0.01min
  • Secondary winding resistance measurement range: 0~8KΩ(auto range 2/20/80Ω/800Ω/8kΩ); Deviation< 0.2%RDG+0.02%FS. Max. resolution0.1mΩ
  • Temperature measuring-50~100℃, Deviation<3℃
  • CT Secondary load measurement: 0160ohm(2/20/80ohm/160ohm)
  • Deviation: 0.2%RDG+0.02%FS
  • Max. Resolution: 0.001ohm
  • PT secondary load measuring080kohm(800ohm/8kohm/80kohm)
  • Deviation: 0.2%RDG+0.02%FS
  • Max. Resolution:0.1ohm
  • PT turns ratio measuring range1~30000; 1~5000 Deviation<0.2% ; 5000~30000 Deviation<0.5%
  • PT phase angle measuring deviation<30
  • Data storage groupsmore than 1000 groups

Working environment: Temperature: -10℃50℃; Humidity:≤90%

Overall size: 485mm×356mm×183mm

Weight: 15Kg


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