UHV(L) Power Frequency Series Resonant System

The UHV(L) Power Frequency Series Resonant Test System is designed for AC withstand tests on single hydro-generators with a capacity of 250MW or less. This system delivers an output voltage waveform with a distortion rate (THD) superior to all existing AC withstand voltage devices, effectively preventing flashover or breakdown and automatically extinguishing arcs after flashover. The main unit of the power frequency withstand voltage tester features large output capacity while requiring only a small power supply.

The UHV(L) Power Frequency Series Resonant Test System operates on the principle of series resonance, where the inductive reactance of its reactors is tuned to match the capacitive reactance of the test object (e.g., generator windings), creating resonance at power frequency. This allows the system to generate high output test voltages while drawing minimal input current, making it highly efficient.

Key advantages include:

High efficiency and low input power requirement due to resonance;

Superior output waveform quality with low distortion (THD);

Automatic arc extinguishing and protection against flashover or breakdown;

Portable and adaptable design, suitable for on-site testing.

This system offers a reliable, energy-saving solution for high-voltage diagnostic testing in power generation and transmission applications.