Final Adjustment Of Compensation For Vt Ratio Differences; Completing The Test; Loss Of Voltage Check Lovptuv; Measuring The Operate Limit Of Set Values - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
4. Check the measured time by comparing it to the set trip time
5. Increase the voltage until START signal resets. Measure the time from reset of START
signal to reset of TRIP signal.
6. Check the measured time by comparing it to the set trip reset time
11.6.5.4

Final adjustment of compensation for VT ratio differences

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.
2. Record the differential voltages.
3. Calculate the compensation factor
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.
11.6.5.5

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.6.6

Loss of voltage check LOVPTUV

Prepare the IED for verification of settings as outlined in section
section
11.6.6.1

Measuring the operate limit of set values

1. Check that the input logical signals BLOCK, CBOPEN and VTSU 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
local HMI.
4. Inject the measured voltages at rated values for at least set
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
198
The IED voltage inputs should be connected to the VTs according to valid
connection diagram.
"Preparing for test" in this chapter.
tTrip time a TRIP signal appears on the corresponding binary output or on the
Note that TRIP at this time is a pulse signal, duration should be according
tPulse .
to set
© Copyright 2017 ABB. All rights reserved
RFLx for each phase.
1MRK 504 165-UEN E
tTrip .
tReset .
SEMOD175258-183 v2
SEMOD175258-208 v2
TESTMODE setting to Off .
SEMOD175023-3 v5
"Requirements" and
SEMOD175023-7 v7
tRestore time.
tRestore time.
Transformer protection RET670
Commissioning manual