Check Of Voltage Differential Trip And Alarm Levels - ABB rec670 Commissioning Manual

1MRK 511 360-UEN A
10.5.4.2
Bay control REC670 2.1 IEC
Commissioning manual
Testing functionality by secondary injection
UL1
UL2
UL3
UN
IEC07000107 V2 EN
Figure 19: Connection of the test set to the IED for test of U2 block level
where:
1 is three-phase voltage group1 (U1)
2 is three-phase voltage group2 (U2)
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 according to
figure 19.
The voltage differential START signal is set.
3. Decrease slowly the voltage in phase UL3 of the test set until the START signal
resets.
4. Check U2 blocking level by comparing the voltage level at reset with the set
undervoltage blocking U2Low.

Check of voltage differential trip and alarm levels

Procedure
1. Connect voltages to the IED according to valid connection diagram and
figure 20.
Section 10
UL1
UL2
1
UL3
UN
UL1
2
UL2
UL3
IEC07000107-1-en.vsd
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