AC Resonant Test System

The AC resonance test system is designed for a wide range of high-voltage withstand voltage testing applications. It can perform AC withstand voltage tests on 10kV, 35kV, and 110kV power cables, supporting cable lengths up to 3km, 1km, and 0.2km respectively. With an adjustable frequency range of 30Hz to 300Hz and a maximum test voltage of 265kV, the system provides flexible and reliable testing for various cable and electrical equipment requirements.

The system is also suitable for AC withstand voltage testing of transformers up to 120MVA/110kV, as well as 110kV busbars, GIS equipment, and switchyard systems. Its strong capacitive load capability ensures stable resonance performance and accurate insulation assessment, making it an ideal solution for commissioning tests, preventive maintenance, and acceptance testing in substations, power utilities, industrial facilities, and electrical engineering projects.

1.Suitable for the partial discharge and induction withstand voltage test of power transformer of 400kV/350MVA and below;
2.AC power frequency converter adopts a linear amplification circuit; sine wave output with small waveform distortion.
3.Automatic and steady voltage adjustment.
4.Overvoltage, overcurrent and other protection functions make the device safe and reliable.

1. The required power supply capacity is greatly reduced to 1/Q (usually Q≥10) of the traditional power capacity.
2. Smaller in size and lighter in weight with the same capacity.
3. The waveform distortion rate is less than 1%.
4. The applied series resonance is characterized by a steady voltage boost and easy operation.

1.The required power capacity is greatly reduced, which is only 1/Q of the test capacity.
2. The weight and size of the device is greatly reduced to 1/10-1/30 of the taditional test device.
3. Obtaining a good sinusoidal waveform by reducing the waveform distortion of output voltage.
4. Efficiently finding the insulation weakness and preventing large short-circuit current from burning the fault point.

1. The required power capacity is greatly reduced
2. The weight and volume of the device is greatly reduced.
3. There will be no recovery overvoltage.
4. The device has over-voltage, over-current, zero start, system detuning (flashover) and other protection functions.