Final Adjustment Of Compensation For Vt Ratio Differences; Completing The Test; 100% Stator Earth Fault Protection, 3Rd Harmonic Based Stefphiz; Testing - ABB RELION REG670 Commissioning Manual

Section 12
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
12.6.5.4

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.
12.6.5.5

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.
12.6.6 100% Stator earth fault protection, 3rd harmonic based
STEFPHIZ
Prepare the IED for verification of settings outlined in section "Requirements" and
section "Preparing for test" in this chapter.
12.6.6.1

Testing

The protection function uses measurement of the third-harmonic voltages in the neutral point
of the generator and on the generator terminal (broken delta voltage transformer connection
to the IED).
The test set shall be capable to generate third-harmonic voltages. One voltage (U
connected to the residual voltage input related to the terminal side of the generator. The
second voltage (U
The angle between the injected third-harmonic voltages shall be adjustable.
190
The IED voltage inputs should be connected to the VTs according to valid
connection diagram.
RFLx for each phase.
) is connected to the voltage input related to the neutral of the generator.
N3
1MRK 502 067-UEN B
tTrip .
tReset .
SEMOD175258-183 v2
SEMOD175258-208 v2
TestMode setting to Off .
SEMOD158990-3 v4
SEMOD158990-8 v3
) is
N3
Commissioning manual