ABB RELION RET670, Commissioning Manual, Page: 203 / 328

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.
Use the TRIP signal from the configured binary output to 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.
13. Repeat the previous two steps 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. 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 CCPDSC (52PD) protection.
Use the TRIP signal from the configured binary output to stop the timer.
15. Deactivate the CLOSECMD. Decrease one current with 80% of the current
unsymmetrical level compared to the other two phases. Activate CLOSECMD.
NO TRIP signal should appear.
11.5.9.2 Completing the test
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.
11.5.10 Directional underpower protection GUPPDUP (37)
Prepare the IED for verification of settings outlined in Section "Preparing the IED to
verify settings" .
11.5.10.1 Verifying the settings
The underpower protection shall be set to values according to the real set values to be used.
1MRK 504 165-UUS -
Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 197
Commissioning manual