The KDXZ-970 generator power frequency withstand voltage test device adopts a working mode of parallel connection of multiple reactors, adjusts the inductance of adjustable reactors, and achieves resonance state by connecting fixed reactors of different numbers in parallel. Reasonably configure fixed and adjustable reactors of different capacities according to the size of the test capacity, in order to reduce the power supply capacity and the volume and weight of the test equipment.

1. Conducting AC withstand voltage tests on generators of the same voltage level and capacity greatly reduces the overall weight of the equipment, with a single piece of equipment weighing 1/5 of traditional equipment, solving the problem of difficult on-site handling; Due to full compensation of resonant reactive power, the power of the power supply and equipment is only less than 1/10 of the required capacity of the test sample (1/Q>10); The device has a large output capacity but requires a small power supply capacity for configuration.
2. The principle of the entire device is high-tech, using advanced casting technology. The entire system is a dry structure and uses precision machined transmission mechanisms, greatly reducing the noise of equipment operation.
3. The excitation transformer has high and low voltage dual outputs, and after configuring a rectifier silicon stack, it can also perform DC withstand voltage tests on the generator.
4. Configure a dry-type column regulator with good output waveform and stability.
5. The inductance configuration of fixed and adjustable reactors is reasonable, and they have good resonance points for different capacitance samples without resonance blind spots.
6. The operating system can not only adjust voltage and inductance, but also monitor the power factor, high voltage side current, high voltage test voltage, low voltage output voltage, and air gap rise and fall values of the circuit in real time, with overcurrent and overvoltage protection.
7. Series resonance is actually a current filtering circuit, which makes the current passing through the test sample basically the fundamental current, and the waveform distortion rate (THD) of the output voltage is small, which is superior to most existing types of AC withstand voltage equipment.
8. The short-circuit current after flashover or breakdown of the test sample is only 1/10 or less of the pre short-circuit test current (1/Q), which can effectively prevent the expansion of damage to the fault point after breakdown.
9. Immediately after flashover, the arc will be automatically extinguished, and the process of establishing the resonant state voltage after extinguishing the arc is relatively long (in seconds), which is a steady-state establishment process without considering voltage overshoot or the danger of restoring overvoltage in microsecond level and millisecond level transient processes.