Single-phase Relay Protection Tester: Usage And Precautions

Preliminary Preparation
Inspect the device's appearance and cable insulation, and ensure the power switch is off.
Place the device in a ventilated, dry environment. Connect the device to an AC 220V ± 5% power supply, separating it from high-power devices.
Disconnect the actual circuit of the device under test and record its rated parameters.
Wiring Operation
Connect the current wire to the current output terminal and the current input terminal of the device under test, and the voltage wire to the voltage terminal.
Tighten the wiring to prevent loose connections. For special devices, connect the polarity wires according to the manual.
Parameter Setting
After the power-on self-test, select single-phase mode and enter the corresponding function menu.
Enter parameters according to the device under test type (such as current/voltage set values, fault type, etc.).
Test Recording
After confirming that everything is correct, start the test and record the operating time and current/voltage values.
Repeat the test 2-3 times, take the average value, and compare it to the rated value to determine compliance.
Store data (supports USB flash drive export).
Closing Procedures
Disable output and power off. Remove and organize the cables. Restore the circuit of the device under test and put it back into operation after inspection.

Precautions
Safety Regulations
Do not touch the output terminals during testing. Always turn off the power when adjusting wiring.
Do not exceed the rated output range and match the capacity of the device under test.
Operation Taboos
Current/ Do not mix voltage circuits. Connect polarity devices strictly to terminals with the same polarity. Check parameters to prevent damage to the equipment due to exceeding rated values. Environmental Maintenance: Avoid humid (>85%), high temperatures (>40°C), dusty, and corrosive environments. Inspect cables monthly, calibrate them semi-annually, and power them on for 30 minutes per month of extended periods of inactivity. Troubleshooting: If an overload or short-circuit error occurs, immediately shut down the device for inspection, troubleshoot, and restart. If the device under test experiences an abnormality, first check the wiring and parameters before determining if there is a problem with the device itself.