ABB RET670 - Completing the Test; Testing the Block Input, Interaction between FDPSPDIS or FRPSPDIS and ZMRPSB; Power Swing Logic ZMRPSL

ZMRPSB during power swing. Use the result from test of ZMRPSB above to
determine when the fault shall be applied. The earth-fault must be activated
before tR1 has elapsed.
3. Start the sequence and observe that the START signal will not be activated.
13.5.5.4 Testing the block input, interaction between FDPSPDIS or
FRPSPDIS and ZMRPSB
Precondition
The BLOCK input is configured and connected to STPE output on the FDPSPDIS
or FRPSPDIS function.
1. Make a test sequence so that a single phase-to-earth-fault occurs after that the
trajectory of the impedance has passed the outer boundary but not the inner
boundary of the power swing detection function ZMRPSB. Use the result
from test of ZMRPSBabove to instance when the fault shall be applied.
2. Start the test sequence by continuously reducing the voltage and observe that
the output signal ZOUT may come, but not START.
If the input I0CHECK is configured (connected to output signal STPE on
FDPSPDIS or FRPSPDIS), the test of inhibit of ZMRPSB at earth-fault
during power swing can be done in the same way as for test of tR1. The
inhibit of ZMRPSB shall be instantaneous if the input TRSP is activated at
the same time as the input I0CHECK during power swing.
13.5.5.5 Completing the test
Continue to test another function or end the test by changing the Test mode setting
to Off. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.5.6 Power swing logic ZMRPSL
Prepare the IED for verification of settings as outlined in section
"Overview" and
section "Preparing for test" in this chapter.
Most readily available test equipment does not permit simulation of power-swing
conditions and the simultaneous occurrence of different faults with controlled fault
impedance. For this reason it is necessary to enable the logic by connecting the
STPSD input signal to some other functional signal, which is used for testing
purposes.
Make sure that the existing configuration permits monitoring of the CS, TRIP
signals on the binary outputs of the IED. If not, configure connections to unused
binary outputs, for test purposes.
1MRK 504 088-UEN C Section 13
Verifying settings by secondary injection
131
Installation and commissioning manual