Partial discharge-free induced withstand voltage resonance test system can be used for AC withstand voltage tests and partial discharge tests on all electrical equipment.

It utilizes an excitation transformer to excite a series or parallel resonant circuit. By adjusting the output frequency 

of the frequency converter,

the inductance L of the reactor and the capacitance C of the test object resonate in the circuit. The resonant

 voltage is the voltage applied to the test object. Alternatively, it can be directly output to the primary winding 

of a transformer via an intermediate transformer for induced withstand voltage testing.

1. Good test equivalence. The output of this device is a sine wave with low waveform distortion. 

The waveform distortion rate is <3%, unlike other types of frequency converters (which output square waves, 

which are then shaped into sine waves). Therefore, this device does not require peak value measurement during 

the test.

2. Fiber optic control completely isolates the high-voltage and low-voltage control circuits.

3. Small size, light weight, and flexible transportation, making it ideal for field use.

4. Simple and convenient operation and wiring, improving work efficiency by 50% (compared to generator sets). 

5. Safe and reliable, this device integrates multiple protections, including: discharge breakdown protection,

overvoltage setting protection, output short-circuit protection, power-on zero-position protection, bridge arm 

amplification circuit protection, and power curve protection. When any of these protections occur, 

the device immediately disconnects the test voltage output and cuts off the main circuit power supply, 

ensuring the safety of test personnel, the test sample, and the test system.

6. The signal source in this device is generated by a dedicated chip and controlled by a microcomputer, 

resulting in high output frequency stability, reaching 0.01Hz.

7. High-speed microcomputer control of the frequency converter output voltage ensures output voltage

 instability of <1%.

8. Selectable manual/automatic boost switching

1. Rated Input Voltage: Three-phase AC 380V ± 10%, 50Hz

2. Rated Output Power: Single-phase 450kW

3. Output Frequency Range: 20Hz～300Hz, continuously adjustable; 0～350V, continuously adjustable

4. Rated Output Voltage: 0～350V, continuously adjustable

5. Rated Output Current: 0～1286A, continuously adjustable

6. Frequency Instability: <0.05%

7. Voltage Instability: <1.0%

8. Nonlinear Distortion: <1.0%

9. Partial Discharge: <10pC (Measured on the high-voltage side of the boost transformer)

10. Operating Conditions: Temperature -10℃～+45°C, Humidity: 10-90%RH

11. Cooling Method Forced air cooling;

No partial discharge induced withstand voltage resonance, no partial discharge induced withstand

 voltage resonance test system, no partial discharge frequency conversion series resonance, no partial 

discharge series resonance test device, no partial discharge frequency conversion series resonance.