13.6.7.9 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.
13.6.8
Pole discordance protection CCRPLD
Prepare the IED for verification of settings as outlined in section
"Preparing for
test" and section "Preparing for test" in this chapter.
13.6.8.1 Verifying the settings
1. External detection logic, Contact function selection = ContSel setting equals
CCRPLD signal from CB. Activate the EXTPDIND binary input, and
measure the operating time of CCRPLD.
Use the TRIP signal from the configured binary output to stop the timer.
2. Compare the measured time with the set value tTrip.
3. Reset the EXTPDIND input.
4. Activate the BLKDBYAR binary input.
This test should be performed together with Autorecloser SMBRREC.
5. Activate the EXTPDIND binary input.
No TRIP signal should appear.
6. Reset both BLKDBYAR and EXTPDIND binary inputs.
7. Activate the BLOCK binary input.
8. Activate EXTPDIND binary input.
NO TRIP signal should appear.
9. Reset both BLOCK and EXTPDIND binary inputs.
10. If Internal detection logic Contact function selection = ContSel setting equals
Pole position from auxiliary contacts. Then set inputs
POLE1OPN...POLE3CL in a status that activates the pole discordance logic
and repeats step 2 to step 6.
11.
Unsymmetrical current detection with CB monitoring: Set measured current
in one phase to 110% of current release level. Activate CLOSECMD and
measure the operating time of the CCRPLD protection.
Use the TRIP signal from the configured binary out put stop the timer.
12. 12. Deactivate the CLOSECMD: Set measured current in one phase to 90%
of Current Release level. Activate CLOSECMD.
NO TRIP signal should appear.
13. 13. Repeat step 14 and 15 using OPENCMD instead of CLOSECMD.
Asymmetry current detection with CB monitoring: Set all three currents to
110% of Current Release level. Activate CLOSECMD.
NO TRIP signal should appear due to symmetrical condition.
14. 14. Deactivate the CLOSECMD. Decrease one current with 120% of the
current unsymmetrical level compared to the other two phases. Activate
CLOSECMD and measure the operating time of the CCRPLD protection.
1MRK 504 088-UEN C Section 13
Verifying settings by secondary injection
151
Installation and commissioning manual
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