ABB RET670 - Check of Voltage Differential Trip and Alarm Levels

VA
VB
VC
VN
VA
VA
VB
VC
I
E
D
T
E
S
T
S
E
T
I
E
D
ANSI07000107-1-en.vsd
VB
VC
VN
1
2
ANSI07000107 V2 EN
Figure 49: Connection of the test set to the IED for test of V2 block level
where:
1 is three-phase voltage group1 (V1)
2 is three-phase voltage group2 (V2)
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 49.
The voltage differential PICKUP signal is set.
3. Decrease slowly the voltage in phase VC of the test set until the PICKUP signal
resets.
4. Check V2 blocking level by comparing the voltage level at reset with the set
undervoltage blocking V2Low.
11.6.5.2 Check of voltage differential trip and alarm levels
Procedure
1. Connect voltages to the IED according to valid connection diagram and figure
50.
1MRK 504 165-UUS - Section 11
Testing functionality by secondary injection
Transformer protection RET670 2.2 ANSI 219
Commissioning manual