Completing The Test; Voltage Differential Protection Vdcptov; Check Of Undervoltage Levels - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
11.5.3.2

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.5.4

Voltage differential protection VDCPTOV

Prepare the IED for verification of settings as outlined in section
"Preparing for test"
11.5.4.1

Check of undervoltage levels

This test is relevant if the setting
Check of U1Low
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure 27.
2. Apply voltage higher than the highest set value of
three-phase inputs and to one phase of the U2 inputs according to figure 27.
The voltage differential START signal is set.
IEC07000106 V2 EN-US
Figure 27: Connection of the test set to the IED for test of U1 block level
where:
1
2
3. Decrease slowly the voltage in phase UL1 of the test set until the START signal resets.
4. Check U1 blocking level by comparing the voltage level at reset with the set undervoltage
blocking
5. Repeat steps
124
in this chapter.
BlkDiffAtULow = Yes .
UL1
UL2
UL3
UN
is three-phase voltage group1 (U1)
is three-phase voltage group2 (U2)
U1Low .
U1Low for the other phases.
2 to 4 to check
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TESTMODE setting to Off .
"Requirements"
UDTrip , U1Low and U2Low to the U1
UL1
UL2
1
UL3
UN
UL1
2
UL2
UL3
IEC07000106-1-en.vsd
1MRK 511 403-UEN E
SEMOD54358-38 v4
SEMOD175258-3 v2
and section
SEMOD175258-71 v2
SEMOD175258-75 v3
Bay control REC670
Commissioning manual