ABB Relion 670 Series Commissioning Manual page 114

Section 10
Testing functionality by secondary injection
108
Check of V1Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 16.
2. Apply voltage higher than the highest set value of VDTrip, V1Low and V2Low to
the V1 three-phase inputs and to one phase of the V2 inputs according to
figure 16.
The voltage differential PICKUP signal is set.
VA
VB
VC
VN
ANSI07000106 V2 EN
Figure 16: Connection of the test set to the IED for test of V1 block level
where:
1 is three-phase voltage group1 (V1)
2 is three-phase voltage group2 (V2)
3. Decrease slowly the voltage in phase VA of the test set until the PICKUP signal
resets.
4. Check V1 blocking level by comparing the voltage level at reset with the set
undervoltage blocking V1Low.
5. Repeat steps 2 to 4
The connections to V1 must be shifted to test another phase. (VA
to VB, VB to VC, VC to VA)
to check V1Low for the other phases.
1MRK 505 304-UUS -
VA
VB
1
VC
VN
VA
2
VB
VC
ANSI07000106-1-en.vsd
Busbar protection REB670 2.0 ANSI
Commissioning Manual