Used to test all performance parameters of current transformers, such as error, insulation resistance, primary withstand voltage, secondary withstand voltage, and turn-to-turn insulation, etc

Used to test all performance parameters of voltage transformers, including error, insulation resistance, primary withstand voltage, secondary withstand voltage, partial discharge, etc

The three-phase mutual inductor calibration device is an important equipment for measuring the error of the mutual inductor in the calibration box. This device consists of a three-phase voltage regulator, a three-phase mutual inductor load box, a three-phase standard mutual inductor, and a three-phase mutual inductor calibration instrument, which serves as the basis for the error measurement of the mutual inductor.

The following components must be provided according to actual requirements: voltage regulator, load box for current transformer, standard current transformer, and current transformer calibration instrument.

Testing requirements for current transformers and voltage transformers with the following specifications: voltage level ≤35kV and rated current ≤5000A.
The test items include: Current Transformer:
1) Accuracy test;
2) Primary end power frequency withstand voltage test;
3) Capacitance and dielectric loss factor measurement;
4) Interphase power frequency withstand voltage test;
5) Secondary end power frequency withstand voltage test;
6) Secondary winding resistance (Rct) measurement;
7) Turn-to-turn overvoltage test;
8) Secondary circuit time constant measurement;
9) Rated turn-off potential and rated turn-off excitation current test;
10) Turn-to-turn overvoltage test;
11) Remanence coefficient measurement;
12) Instrument security factor measurement for current transformers.
Voltage transformer:
1) Accuracy test;
2) Excitation characteristic measurement;
3) Primary end power frequency withstand voltage test;
4) Capacitance and dielectric loss factor measurement;
5) Interphase power frequency withstand voltage test;
6) Secondary end power frequency withstand voltage test