The three-phase current protection tester uses a rotary mouse, greatly simplifying the structure of the operating section, making operation simple, quick, and easy to master. The main unit employs a high-speed, high-performance digital signal processor, boasting fast processing speed and wide transmission bandwidth. The software utilizes a double-precision algorithm to generate arbitrary high-precision waveforms for each phase. Due to its integrated structure, all parts are tightly combined, resulting in short data transmission distances and a compact design. A large, high-resolution graphic LCD screen is used, with all operation processes set on the display. The operating interface and test results are displayed in Chinese, providing a clear and intuitive view. During later use, minor malfunctions are inevitable with the three-phase current protection tester; operators should be familiar with how to handle these common faults.
Troubleshooting methods for several common faults in a three-phase current protection tester:
1. Voltage disconnection lockout during impedance characteristic test.
Solution:
The three-phase relay protection tester failed to reset the fault signal. This is because the return time setting in the parameters is incorrect and should be greater than the protection reset time.
2. With the power amplifier switch on, there is no obvious change in power output, and all function menu tests show no fault output.
Solution:
If the power fuse blows, replace it with the same model immediately.
3. Turn on the power switch and you will hear an alarm sound.
Solution:
Turn off the power switch, reset the amplifier switch, and then turn the power on.
IV. During the test of the entire protection group, if the contacts are at potential for a certain period of time, the protection will not activate.
Solution:
Check the wiring and reverse the high and low potential connections.
