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.

Line protection

Multi-section over current

Corresponding test items

AC Test

As long as the method is proper, the tests of most relays and microcomputer protection can be done by the ‘AC Test’ module, which should be selective learning.

Over (under) voltage

Sequence component voltage and current

Frequency device

Power direction protection

Reclosing and tansform fault

Corresponding test items

Full Group Test, State Series, Comprehensive Test of Line Protection of 6-35 KV Microcomputer

Requirement that if the Synchronization check and no-voltage check test is done, the Ux as the side and side voltage output and the tester is to use Ua instead of Ux for testing.

Distance & Zero Sequence Protection,

The Setting value verification of Distance & Zero Sequence Protection

Distance & Zero Sequence Protection, Full Group Test, AC Test

"Distance & Zero Sequence Protection” can automatically test multiple sections, various fault types and other distance and zero sequence value.

Characteristic of Impedance

Characteristic of Impedance

Power frequency variation distance

Setting value verification

Distance & Zero Sequence Protection

The fault current should be large enough, such as 10~15A (when CT is 5A)

Compound voltage blocking(directional) overcurrent

Over current, low voltage, negative sequence voltage, sensitive angle

AC Test, Comprehensive Test of Line Protection of 6-35 KV Microcomputer

Some of the protection of the "low voltage" and "negative sequence voltage" input by different terminal, replacing the wiring is necessary in the test.

Low cycle, low voltage load shedding device

Corresponding test items

High-Low Frequency Test, Comprehensive Test of Line Protection of 6-35 KV Microcomputer

If other conditions are satisfied, the device cannot move, please confirm whether the device also need to input current and switch contacts

The generator transformer protection

Differential protection

Proportional braking characteristic

Differential Protection, Differential Value, AC Test

When the differential protection is used in the differential protection of generator, it can be regarded as the transformer protection with the connection type of Y/Y, high and low voltage side balance coefficient of 1.

"Differential protection" module pay attention to the curve characteristic search and the "differential value" module focuses on the differential value test. Their combination can test the differential protection.

Harmonic braking characteristic

Differential Protection, Differential Value, Harmonic Test

Loss of magnetic protection

Corresponding test items

AC Test

The angle of output voltage and current should be paid attention in the test.

Excitation protection

Other protection

Automatic quasi synchronization device

Corresponding test items

Synchronization Test

To do the automatic adjustment test, the line must be in accordance with the requirements of instruction when testing the input.

Busbar differential protection

Corresponding test items

AC Test

Please see the instructions of the BP-2B and RCS-915 of "Nari part protection" on in the Appendix 6.

Optical fiber line differential protection

Before the test to determine whether the device to form a "self loop", if, then the protection of the action value should be equal to half of its set value.