Remove the test line and use a multimeter to detect the current and voltage output, return the interface to the parameter setting interface of the AC test, and also set the voltage amplitude, amplitude step and other parameters first, and then use the multimeter head to test the. Remove the test line and use a multimeter to detect the current and voltage output, return the interface to the parameter setting interface of the AC test, and also set the voltage amplitude, amplitude step and other parameters first, and then use the multimeter head to test the. Let's use the specific method of relay protection! 1. Wiring instructions The yellow, green, red and black wiring terminals on the panel of the relay protection tester are the voltage output terminals of the instrument. There is a grounding. Relay protection tester (also known as relay protection calibration device) can carry out overcurrent relay test, undervoltage relay test, overvoltage relay test, intermediate relay test, time relay test and other tests, that we use the relay protection tester to carry out these tests the specific. Power Source: Make sure that the relay tester is powered by the right power source. Choose What Test You Want To Perform: Indicate the kind of test that you will undertake. There is a DC output and power connection on the back of the panel.