11.6.4.2 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to
Disabled. Restore connections and settings to their original values, if they were changed
for testing purposes.
11.6.5 Voltage differential protection VDCPTOV (60)
Prepare the IED for verification of settings as outlined in section
"Requirements" and
section "Preparing for test" in this chapter.
11.6.5.1 Check of undervoltage levels
This test is relevant if the setting BlkDiffAtVLow = Yes.
Check of V1Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 48.
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 48.
The voltage differential PICKUP signal is set.
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 217
Commissioning manual
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