This induced overvoltage withstand test device is composed according to the test methods and test circuits specified in the national standards GB1094.3-85 "Power Transformers Part 3: Insulation Levels and Insulation Tests" and GB6495-86 "Dry-type Power Transformers". It provides a frequency-multiplied AC power supply from a generator set, which is filtered by a frequency-multiplied generator power isolation filter to remove high-frequency interference signals from the power line and harmonic signals from the generator set, then applied to the low-voltage side of the transformer, inducing a test high voltage on the high-voltage side for partial discharge testing.



This system is suitable for induced overvoltage withstand and partial discharge testing of distribution transformers and power transformers. The system background noise is not greater than 5pC, and the partial discharge signals are clear, making it an ideal device for transformer induced overvoltage withstand and partial discharge testing.

This control console serves as the central control unit, which can control the operation to produce an adjustable power supply of 40-800V at 125Hz, 150Hz, and 200Hz from the generator set.

Alternative Names:


Frequency-multiplied withstand voltage tester, frequency-multiplied withstand voltage test device, triple-frequency withstand voltage test device.

◆ This control cabinet can only start the medium-frequency power supply function when the voltage regulator is started at the zero position, ensuring that the medium-frequency power supply outputs from a low potential.

◆ After the motor is started by Y-△ conversion, the medium-frequency indicator light will illuminate, and only then can the medium-frequency power supply be started, ensuring the motor starts at full voltage.

◆ The motor has thermal relay protection. When the motor overheats, the main circuit is cut off, and the voltage regulator automatically returns to the zero position.

◆ When the excitation power supply current and the medium-frequency output power supply are overloaded, the overcurrent relay operates, cutting off the main circuit, and the voltage regulator automatically returns to the zero position.

Device Parameters:


Motor Technical Parameters:

◆ Rated Capacity: 30KW

◆ Input Voltage: Three-phase four-wire AC380V ±10%

◆ Input Current: 75A

◆ Input Frequency: 50Hz ±2Hz

◆ Power Factor: cosφ0.8

Generator Technical Parameters:

◆ Rated Capacity: 40KVA

◆ Power Factor: cosφ0.5

◆ Output Capacity: 20KW

◆ Output Voltage: 40~800V AC

◆ Output Current: 25A

◆ Output Frequency: 150Hz ±2Hz

◆ Excitation Mode: DC excitation regulation

Working Environment:

◆ Ambient Temperature: -15°C to 45°C

◆ Relative Humidity: ≤85%RH

◆ Altitude: ≤2500 meters