ABB RET670 Commissioning Manual page 178

Section 10
Testing functionality by secondary injection
ANSI07000106 V2 EN-US
Figure 39: Connection of the test set to the IED for test of V1 block level
where:
1
2
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
5. Repeat steps
Check of V2Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 40.
172
VA
VB
VC
VN
is three-phase voltage group1 (V1)
is three-phase voltage group2 (V2)
V1Low .
2 to 4 to check V1Low for the other phases.
The connections to V1 must be shifted to test another phase. (VA to VB, VB to
VC, VC to VA)
VA
VB
1
VC
VN
VA
2
VB
VC
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Commissioning manual