Pole Discordance Protection (Rpld, 52Pd) - ABB REL670 Installation And Commissioning Manual

6.9
Current protection
14. Continue to test another function or end the test by changing the test
mode setting to off.

Pole discordance protection (RPLD, 52PD)

Prepare the terminal for verification of settings as outlined in
this chapter.
Procedure
1. External detection logic, Contact function selection=ContSel setting
equals PD signal from CB. Activate the EXTPDIND binary input, and
measure the operating time of the PD protection.
Use the TRIP signal from the configured binary output stop the timer.
2. Compare the measured time with the set value TimeDelayTrip .
3. Reset the EXTPDIND binary input.
4. Activate the BLKDBYAR binary input.
This test should be performed together with AR.
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 discor-
dance logic and repeats steps 2-9 above.
11. Unsymmetry 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 PD protection.
Use the TRIP signal from the configured binary out put stop the timer.
12. Deactivate the CLOSECMD.: Set measured current in one phase to
90% of Current Release level. Activate CLOSECMD.
NO TRIP signal should appear.
Chapter 11
Verifying settings by secondary
section 2 "Preparing for test"
injection
in
115