How to test the action time of relay protection tester02-06, 2026

The method of testing the action time of the relay protection tester mainly includes the following steps :
‌Connect the equipment and set parameters‌ : First, make sure the relay protection tester is properly connected to the equipment under test. Then, set the tester parameters, including the operating voltage, operating current, and the phase angle between voltage and current. Usually, the angle between voltage and current should be set within the protection action zone to obtain accurate test results.
‌Perform an action time test‌ :
‌Direct voltage application method‌ : Directly apply an action voltage and action current to the protection, and ensure that the phase angle between the voltage and current is within the action range. Record the time of the protection action.
‌Search for the maximum sensitive phase angle‌ : If the maximum sensitive phase angle of the protection is not certain, you can search by gradually adjusting the phase angle between the voltage and current. Start from 0° and gradually increase the phase angle until you find the boundary of the protection action, thus determining the maximum sensitive phase angle.
‌Record and analyze data‌ : When performing an action time test, it is necessary to record the results of multiple measurements and calculate the average value to obtain more accurate data. Usually, multiple measurements are required to ensure the reliability of the results.
Factors affecting action time and how to reduce errors :
Phase angle between voltage and current‌ : Make sure the phase angle between voltage and current is within the protection action area. Usually, the maximum sensitive angle is selected for testing to obtain more accurate results.
‌Multiple Measurements‌ : Perform multiple measurements and calculate the average value to reduce the error of a single measurement.
‌Set the correct parameters‌ : Before testing, make sure all parameters are set correctly, including voltage, current, and phase angle, to avoid test errors caused by incorrect parameter settings.
By following the above steps and precautions, the action time of relay protection equipment can be effectively tested to ensure that its performance meets the requirements.