ABB REL670 Installation And Commissioning Manual page 107

5.3.2
5.3.3
Distance protection
5. Increase the measured voltages to their rated values.
Testing the one-of-three-phase operation
Procedure
1. Check the existing (default) configuration of the following function
input signals:
REL1PH, BLK1PH, REL2PH, BLK2PH and record the connections.
2. Reconfigure the IED according to the following list:
• REL1PH to FIXD-ON
• BLK1PH to FIXD-OFF
• REL2PH to FIXD-OFF
• BLK2PH to FIXD-ON
3. Disconnect the L2 and L3 currents from the IED and make sure that
they are short-circuited on the output terminal of the testing equip-
ment.
4. Slowly decrease the measured voltages until the START signal ap-
pears.
5. Increase the measured voltages to their rated values.
Testing the two-of-three-phase operation
Procedure
1. Reconfigure the IED according to the following list:
• REL1PH to FIXD-OFF
• BLK1PH to FIXD-ON
• REL2PH to FIXD-ON
• BLK2PH to FIXD-OFF
2. Slowly decrease the measured voltages to the value, which is rough-
ly 20% lower than the operating value of the R1IN measuring point.
No START signal should appear.
3. Increase the measured voltages to their rated values.
4. Reconnect the phase L2 current to the IED.
5. Decrease the measured voltages until the START signal appears.
6. Increase the measured voltages to their rated values.
7. Connect the phase L3 current to the IED.
8. Restore the original configuration for the functional inputs REL1PH,
BLK1PH, REL2PH and BLK2PH.
Chapter 11
Verifying settings by secondary
injection
99