6. Apply the fault and the initiation again. The value of current should be below the
set value Pickup_BlkCont.
7. Arrange disconnection of BC closed signal(s) well before set back-up trip time t2.
It simulates a correct CB tripping.
8. Verify that back-up trip is not achieved. Re-trip can appear for example, due to
selection “Re-trip without current check”.
9. Disconnect injected AC and BFI_3P input signals.
13.5.8.8 Completing the test
M12104-72 v5
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were
changed for testing purposes.
13.5.9 Pole discrepancy protection CCPDSC (52PD)
SEMOD55625-59 v6
Prepare the IED for verification of settings outlined in Section "Preparing the IED to
verify settings".
13.5.9.1 Verifying the settings
SEMOD55625-63 v8
1. External detection logic, Contact function selection = ContactSel setting equals
CCPDSC (52PD) signal from CB. Activate the EXTPDIND binary input, and
measure the operating time of CCPDSC (52PD).
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 (79).
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 = ContactSel setting equals
Pole position from auxiliary contacts. Then set inputs 52b_A...52a_C 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 CCPDSC (52PD) protection.
Section 13 1MRK 502 073-UUS A
Testing functionality by secondary injection
206 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Commissioning manual
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