ABB REG670 - Page 233

VA
VB
VC
VN
VA
VA
VB
VC
I
E
D
T
E
S
T
S
E
T
I
E
D
ANSI07000108-1-en.vsd
VB
VC
VN
1
2
ANSI07000108 V2 EN-US
Figure 60: Connection of the test set to the IED for test of alarm levels, trip
levels and trip timer
where:
1 is three-phase voltage group1 (V1)
2 is three-phase voltage group2 (V2)
2. Apply 1.2 · Vn (rated voltage) to the V1 and V2 inputs.
3. Decrease slowly the voltage of in phase VA of the test set until the ALARM
signal is activated.
The ALARM signal is delayed with timer tAlarm
4. Check the alarm operation level by comparing the differential voltage level at
ALARM with the set alarm level VDAlarm.
5. Continue to slowly decrease the voltage until PICKUP signal is activated.
6. Check the differential voltage operation level by comparing the differential
voltage level at PICKUP with the set trip level VDTrip.
7. Repeat steps
1 to 6 to check the other phases.
Observe that the connections to V1 must be shifted to test another phase. (VA to
VB, VB to VC, VC to VA)
1MRK 502 073-UUS A Section 13
Testing functionality by secondary injection
Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062 227
Commissioning manual