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13.7.5
Voltage differential protection VDCPTOV
Prepare the IED for verification of settings as outlined in section
and
in this chapter.
13.7.5.1
Check of undervoltage levels
This test is relevant if the setting
BlkDiffAtULow
=
Yes
.
Check of
U1Low
Procedure
1.
Connect voltages to the IED according to valid connection diagram and figure
2.
Apply voltage higher than the highest set value of
UDTrip
,
U1Low
and
U2Low
to the U1 three-phase inputs and to one phase of the U2 inputs
The voltage differential START signal is set.
1MRK 504 088-UEN C
Section 13
Verifying settings by secondary injection
159
Installation and commissioning manual
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