VA
VB
VC
VN
VA
VA
VB
VC
I
E
D
T
E
S
T
S
E
T
I
E
D
ANSI07000106-1-en.vsd
VB
VC
VN
1
2
ANSI07000106 V2 EN-US
Figure 51: 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 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)
Check of V2Low
SEMOD175258-91 v3
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure
52.
Section 11 1MRK 504 165-UUS Rev. J
Testing functionality by secondary injection
210 Transformer protection RET670
Commissioning manual
© 2017 - 2021 Hitachi Power Grids. All rights reserved
To Next Page
Loading...
