ABB Relion 670 series - Completing the Test; Final Adjustment of Compensation for VT Ratio Differences; Loss of Voltage Check LOVPTUV (27); Measuring the Trip Limit of Set Values

4. Check the measured time by comparing it to the set trip time tTrip.
5. Increase the voltage until PICKUP signal resets. Measure the time from reset of PICKUP signal to
reset of TRIP signal.
6. Check the measured time by comparing it to the set trip reset time tReset.
11.6.5.5 Final adjustment of compensation for VT ratio differences
SEMOD175258-183 v2
Procedure
1. With the protection in test mode, view the differential voltage service values in each phase on the
local HMI under Main menu /Test /Function status /Voltage protection /VoltageDiff(PTOV,60) /
VDCPTOV:x .
The IED voltage inputs should be connected to the VTs according to valid
connection diagram.
2. Record the differential voltages.
3. Calculate the compensation factor RF_x for each phase.
For information about calculation of the compensation factor, see the application manual.
4. Set the compensation factors on the local HMI under Main menu /Settings /Settings group N /
Voltage protection /VoltageDiff(PTOV,60) /VDCPTOV:x
5. Check that the differential voltages are close to zero.
11.6.5.6 Completing the test
SEMOD175258-208 v2
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.6.6 Loss of voltage check LOVPTUV (27)
SEMOD175023-3 v5
Prepare the IED for verification of settings as outlined in section
"Requirements" and section "Preparing
for test" in this chapter.
11.6.6.1 Measuring the trip limit of set values
SEMOD175023-7 v7
1. Check that the input logical signals BLOCK, CBOPEN and BLKU are logical zero.
2. Supply a three-phase rated voltage in all three phases and note on the local HMI that the TRIP
logical signal is equal to the logical 0.
3. Switch off the voltage in all three phases.
After set tTrip time a TRIP signal appears on the corresponding binary output or on the local HMI.
Note that TRIP at this time is a pulse signal, duration should be according to set
tPulse.
4. Inject the measured voltages at rated values for at least set tRestore time.
5. Activate the CBOPEN binary input.
6. Simultaneously disconnect all the three-phase voltages from the IED.
No TRIP signal should appear.
7. Inject the measured voltages at rated values for at least set tRestore time.
8. Activate the BLKU binary input.
1MRK 504 165-UUS Rev. J Section 11
Testing functionality by secondary injection
Transformer protection RET670 213
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved