CT PT tester

GF106 CT tester is a current transformer test equipment specially designed for current transformer characteristic test and with additional PT test functions for reference test. GF106 current transformer test equipment is mainly used for field testing, it can finish the measurements (M) and protection (P) class CT, PT and TYP class CT. GF106 CT test equipment can also guessed CT ratio test equipment because of the additional functions including ratio and phase angle differential tests (the measurement points in the IEC60044 & IEC61869 standard), FS and inductance, steady-state parameters, peak error and transient parameters, etc. Adopt 5.6 inch LCD, self-equipped mini type printer supporting field printing; supporting to use USB flash disk to download data, with simple and convenient operation.



  • University;
  • Power plant;
  • Oil, Gas company;
  • Electrical laboratory;
  • Railway electric company;
  • Metrological service center;
  • Power engineering commissioning company;
  • Electricity power bureau & power company;
  • National Metrology and testing department;
  • Current transformer and voltage transformer manufacturers;
  • Electrical Department of industrial and mining enterprises;


  • Portability: weight <8kg;
  • In-built PT test functions;
  • CT ratio error test accuracy 0.05%;
  • The device can store 3000 groups of test data;
  • Parameters such as knee point current and voltage;
  • Parameters such as 10% error curve, 5% error curve;
  • With it thermal printer, printing test results on site;
  • Auto test CT 1%, 5%, 20%, 100%, 120% ratio and phase error;
  • Test CT according to IEC60044-1/6, IEC61869-2, ANSI C57.13;
  • Steady and transient state characteristic tests of various types of CT/PT;
  • The use of advanced power technology, the test knee point reaches up to 45kV;
  • The testing data can be transferred to PC by USB disk and produce test report;
  • No external other auxiliary equipment, stand-alone to complete all test items;
  • CT easy to test, all the tests are using the same wire connection except burden test;


I. Current Transformer (CT) II. Voltage Transformer (PT)
1. Excitation curve 1. Excitation characteristic test
2. CT ratio test 2.  PT ratio test
3. Polarity 3.  Polarity
4. 5% and 10% error curve 4.  Ratio error, phase error
5. Current Injecting(Optional) 5.  Degauss
6. Degauss 6.  Calculation of knee point value
7. Ratio error, phase error 7. Actual secondary load (PT connected burden) test
8. Automatic calculation of excitation knee point value 8. Resistance test
9. Actual secondary load (Current loop burden) test
10. Resistance test
11. Secondary winding time constant (Ts) 
12.  Remanence coefficient (Kr) 
13.  Transient dimensioning factor (Ktd) 
14.  Peak instantaneous error (Er) 
15.  Magnetizing inductance (LU) 


Electrical parameters
Accuracy 0.05%, 0.1%
Power supply AC 220V±10% or AC 110V±10%, 50/60Hz
Excitation output voltage 0-220Vrms
Excitation output current 0-5Arms (20A peak-value)
Automatic frequency variation range 0.1-60Hz
Equivalent excitation voltage ≤5000V
Accuracy ≤0.1%
Secondary winding DC resistance measurement Range 0.1-300Ω
Accuracy ≤0.1%
Secondary actual load measurement Range 0.1VA-1000VA
Accuracy ≤0.1%
CT/PT phase error measurement Accuracy ±3min
Resolution 0.01min
CT ratio error measurement Range 1-30000
Accuracy ≤0.05%
PT ratio error measurement Range 1-10000
Accuracy ≤0.05%
LCD display 5.6' inch blacklight LCD
Cable Length Primary 5m; Secondary 5m; others customized
Communication port USB
PC control software Yes, Optional
Printer Yes, Thermal printer
Reference standards GB1207-2006, GB1208-2006, GB16847-1997
IEC60044-1, IEC60044-6, IEC61869-1,2,3, ANSI/IEEE C57.13
Safety standards GB 4793.1-2007
EMC EMC standard 89/336/EEC
FCC Subpart B of Part 15 Class A
IEC 1000-4-2/3/4/6
Mechanical parameters 
Overall dimension (L x W x H) (mm) 410 x 250 x 300  
Weight(kg)   ≤8 
Environmental conditions 
Operating Temperature -10°C to 50°C
Storage Temperature -40°C to 70°C
Relative humidity ≤95%,on-condensing
Altitude ≤2000m

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