1. Program the test equipment for a single-phase to earth fault and energize
FDPSPDIS or FRPSDIS and check that the input BLOCK on the power swing
detection function ZMRPSB is activated.
2. Make a test sequence so that a single-phase to earth fault occurs after that the
trajectory of the impedance has passed the outer and inner boundary of
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.
10.4.9.4 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 ZMRPSB above 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.
10.4.9.5 Completing the test
Continue to test another function or end the test by changing the TestMode setting to
Off. Restore connections and settings to their original values, if they were changed for
testing purposes.
10.4.10 Power swing logic PSLPSCH
Prepare the IED for verification of settings as outlined in section
"Requirements" 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.
1MRK 506 355-UEN A Section 10
Testing functionality by secondary injection
Line distance protection REL670 2.1 IEC 119
Commissioning manual
To Next Page
Loading...
