ABB REG650 - Checking the Phase Current Operate Value, IP; Checking the Re-Trip and Back-Up Times; Checking the Residual (Earth Fault) Current Operate Value IN> Set below IP

6.5.5.1 Checking the phase current operate value, IP>
Check the current level IP> where setting FunctionMode=Current and setting
BuTripMode=1 out of 3 or 2 out of 4 as set under Main menu/Settings/IED Settings/
Current/CCRBRF(50BF)/CCRBRF:1.
1. Apply the fault condition, including START of CCRBRF, with a current below
set IP>.
2. Repeat the fault condition and increase the current in steps until a trip occurs.
3. Compare the result with the set IP>.
4. Disconnect AC and START input signals.
Note! If NoI>check or Retrip off is set, only back-up trip can be
used to check set IP>.
6.5.5.2 Checking the residual (earth fault) current operate value IN> set below
IP>
Check the low set IN> current where setting FunctionMode = Current and setting
BuTripMode = 1 out of 4 as set under Main menu/Settings/IED Settings/Current/
CCRBRF(50BF)/CCRBRF:1.
1. Apply the fault condition, including START of CCRBRF, with a current just
below set IN>Pickup_N.
2. Repeat the fault condition and increase the current in steps until trip appears.
3. Compare the result with the set IN>.
4. Disconnect AC and START input signals.
6.5.5.3 Checking the re-trip and back-up times
The check of the set times can be made in connection with the check of operate values
above.
Choose the applicable function and trip mode, such as FunctionMode = Current and
setting RetripMode = No CBPos. Check as set under Main menu/Settings/IED
Settings/Current/CCRBRF(50BF)/CCRBRF:1.
1. Apply the fault condition, including start of CCRBRF, well above the set current
value. Measure time from START of CCRBRF.
2. Check the re-trip t1 and back-up trip times t2.
3. Disconnect AC and START input signals.
1MRK 502 049-UEN A Section 6
Testing functionality
69
Commissioning manual