ABB RELION RET670, Commissioning Manual

Page: 177 / 328

1. Set AutoInitMode to DLD disabled and Mode to Impedance .
2. Activate the switch onto fault
BC
input.
During normal operating conditions, the
BC
input is de-energized.
3. Apply a three-phase fault condition corresponding to a fault at approximately 45%
of the line or with impedance at 50% of the used zone setting and current greater than
30% of
IBase .
The
ZACC
input is activated.
4. Check that the
TRIP
output, external signals and indication are obtained.
11.4.13.2 Initiating ZCVPSOF automatically and setting mode to impedance
1. Set AutoInitMode to Voltage and Mode to Impedance .
2. Deactivate the switch onto fault
BC
input.
3. Set the current and voltage inputs to lower than IphPickup and UVPickup for at least
one second.
4. Apply a three-phase fault condition corresponding to a fault at approximately 45%
of the line or with impedance at 50% of the used zone setting and current greater than
30% of
IBase .Apply a two-phase fault condition corresponding to a fault at
approximately 45% of the line or with impedance at 50% of the used zone setting and
current greater than 30% of
IBase .
The
ZACC
input is activated.
5. Check that the correct
TRIP
output, external signals and indication are obtained.
11.4.13.3 Initiating ZCVPSOF automatically and setting mode to VILevel
1. Set AutoInitMode to Voltage and Mode to VILevel .
2. Deactivate the switch onto fault
BC
input.
3. Set the current and voltage inputs to lower than IphPickup and UVPickup for at least
one second.
4. Apply the three-phase currents in such a way that the magnitudes are greater than
IphPickup and the three-phase voltages in such a way that the magnitudes and lower
than UVPickup at least for the duration of the tDuration setting.
5. Check that the correct
TRIP
output, external signals and indication are obtained.
11.4.13.4 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.
1MRK 504 165-UUS -
Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 171
Commissioning manual