CT PT tester

GF106 CT/PT TESTER is mainly used for field testing, it can finish the measurements (M) and protection (P) class CT, PT and TYP class CT. Adopt LCD, self-equipped mini type printer supporting field printing; supporting to use USB flash disk to dump data, with simple and convenient operation.



  • 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 40kV
  • No external other auxiliary equipment, stand-alone to complete all test items
  • CT test, easy to test, all the tests are using the same wire connection except the load test
  • It carries with thermal printer, so it can print test results on site
  • Parameters such as knee point current and voltage
  • Parameters such as 10% error curve, 5% error curve
  • The device can store 3000 groups of test data which would not be lost if the device is power off.
  • The data can be displayed and analyzed after the test, or transferred to PC through USB disk and produce a Word file report
  • Portability: weight < 12kg


I. Current Transformer (CT) II. Voltage Transformer (PT)
1.  Magnetization curve 1.  Excitation characteristic test
2.  Transformation ratio test 2.  Transformation ratio test
3.  Polarity 3.  Polarity
4.  5% and 10% error curve 4.  Ratio error, phases
5.  Current Injecting 5.  Degauss
6.  Degauss 6.  Calculation of knee point value
7.  Ratio error, phases 7.  Actual secondary load (burden), test (burden)
8.  Automatic calculation of excitation knee point value 8.  Resistance test
9.  Actual secondary load test (burden) (load 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 ≤0.5% (0.2%RD+0.3%RG)
Secondary winding DC resistance measurement Range 0.1-300Ω
Accuracy ≤0.5% (0.2%RD+0.3%RG)
Secondary actual load measurement Range 5VA-1000VA
Accuracy ≤0.5% (0.2%RD+0.3%RG)±0.1VA
CT/PT phase error measurement Accuracy ±4min
Resolution 0.01min
CT ratio error measurement Range 1-30000
Accuracy ≤0.5%
PT ratio error measurement Range 1-10000
Accuracy ≤0.5%
Reference standards GB1207-2006, GB1208-2006, GB16847-1997
IEC60044-1, IEC60044-6, IEC61869-2-2012
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)   ≤10 
Environmental conditions 
Relative humidity    90RH%
Operating temperature -10°C to +40°C
Altitude ≤2000m

Main functions

The test items mainly include 
Steady Transient
excitation characteristic secondary winding time constant (Ts)
transformation ratio remanence coefficient (Kr)
polarity transient dimensioning factor (Ktd)
ratio error peak instantaneous error (Er)
phases magnetizing inductance (LU)
5% and 10% error curves other parameters
secondary load 

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