Signal relay

Corresponding test items

DC Test

AC and DC Test

If the intermediate relay is required AC/DC hybrid input, please test in ‘The AC And DC Test ‘module.

If Rated current of the signal relay is too small, please use the voltage loop output of tester to do experiments.

Time relay

Intermediate relay

Coincidence relay

Other DC voltage and current relay

Current relay

Corresponding test items

AC Test

The sequence component relay can be tested in the special sequence module of ‘AC Test’.

The inverse time relay can be tested in the "It characteristics" module.

Over (under) voltage relay

Sequence component relay

Synchronous check (or phase comparison) relay

Inverse time current relay

Differential relay

DC magnetic feature

Differential Relay, Differential Harmonic,

AC/DC Test, Harmonic Test

Please refer to ‘Appendix 5’ for correct wiring in the test

Harmonic braking feature

Proportional braking feature

Differential Relay, AC Test

Power (directional) relay

Corresponding test items

Power Direction &Impedance, AC Test

Before testing the power (direction) relay, the type of connection and the action boundary of the protection should be determined in advance.

Impedance relay

Synchronous relay

Corresponding test items

Synchronization Test, AC Test

UA, UC of tester is fixed as the system side and the side to side voltage output for ‘Synchronization Test’ module.

Frequency relay

Corresponding test items

High-Low Frequency Test

When the ‘automatic frequency conversion’ method is chosen in the single machine, the frequency slip value can be measured.