Generator rotor overvoltage protection device tester

When the generator shuts down normally, malfunctions, or is affected by external factors, it is possible for the rotor of the generator to be damaged by overvoltage:

Once the rotor of a generator is damaged by overvoltage, it will cause a short circuit between the rotor turns or insulation damage and breakdown of the winding to ground. In severe cases, it will threaten the safety of the generator stator and transformer. In order to prevent the occurrence of rotor overvoltage in the above-mentioned generators, many generators in China are now equipped with imported original or assembled excitation devices and accompanying generator rotor demagnetization jumper devices, which have an increasing proportion. Its security has received increasing attention.

According to national requirements, demagnetization and overvoltage protection devices (jumpers) must comply with

DL/T 843-2010 "Technical Conditions for Self parallel Static Excitation System of Large Steam Turbine Generator" specifies the rotor overvoltage test

Regular performance tests of rotor overvoltage devices should be conducted on all operating generators.

In order to facilitate and effectively test the generator rotor demagnetization jumper device, our company has developed a generator rotor demagnetization jumper device testing instrument using our own new technology. As a specialized instrument for this test, it provides a convenient, scientific, safe, and reliable testing instrument for the generator rotor overvoltage protection device during debugging and testing.

Features:

Automatic power disconnection device, used for instrument opening and closing operation;

Isolating the input voltage and output voltage of the power supply ensures the safety of the instrument and the tested equipment;

On the measuring device, the voltage and current meters select the measured object through a conversion switch

An embedded LCD display oscilloscope is also designed on the instrument operation panel to clearly record the conduction angle, characteristics, and conduction voltage of the thyristor in the generator rotor jumper.

The high voltage AC output and high voltage DC output are designed on the back of the instrument box, so that operators can stay away from high voltage electricity during instrument testing operations, ensuring the safety of testing personnel.

Main technical indicators

Working power supply: Power supply voltage: AC220V ± 10% Power supply frequency: (50 ± 1) Hz

Working environment: Temperature: -5~+40 ℃ Relative humidity: not exceeding 90% at+25 ℃

Working mode: manual boosting, zero position self-locking

Display mode: Four and a half digit digital display, embedded oscilloscope

Automatic protection: overcurrent automatic protection, timed sound and light alarm

Rated voltage: DC4.5kV AC3KV Error: ± 1.5%

Rated capacity: 2KVA

Dimensions: 400 × 300 × 300 mm