Check Of Trip And Trip Reset Timers - ABB RET670 Commissioning Manual

Section 10
Testing functionality by secondary injection
ANSI07000108 V2 EN-US
Figure 41: Connection of the test set to the IED for test of alarm levels, trip levels and
where:
1
2
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.
4. Check the alarm operation level by comparing the differential voltage level at ALARM with the
set alarm level
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
7. Repeat steps
Observe that the connections to V1 must be shifted to test another phase. (VA to VB, VB to
VC, VC to VA)
10.6.5.3

Check of trip and trip reset timers

Procdure
174
VA
VB
VC
VN
trip timer
is three-phase voltage group1 (V1)
is three-phase voltage group2 (V2)
The ALARM signal is delayed with timer
VDAlarm .
VDTrip .
1 to 6 to check the other phases.
VA
VB
1
VC
VN
VA
2
VB
VC
ANSI07000108-1-en.vsd
tAlarm
1MRK 504 154-UUS B
SEMOD175258-124 v2
Commissioning manual