Values of the logical signals for CSPRBRF are available on the local HMI under Main menu/
Tests/Function status/Current/CSPRBRF(50BF)/CSPRBRF:1. The Signal Monitoring in
PCM600 shows the same signals that are available on the local HMI.
Breaker failure protection, phase segregated activation and output CSPRBRFshould normally
be tested in conjunction with some other function that provides a start signal. An external
START signal can also be used.
To verify the settings in the most common back-up trip mode
1 out of 3 it is sufficient to test
phase-to-earth-faults.
At mode
2 out of 4 the Phase current setting, IP> can be checked by single phase injection
where the return current is connected to the summed current input. The value of residual (EF)
current IN set lower than
IP> is most easily checked in backup trip mode 1 out of 4.
7.3.10.1
Checking the phase current operate value, IP>
GUID-6A5834FB-5489-4533-AE08-F07FA1F57844 v2
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/
CSPRBRF(50BF)/CSPRBRF:1.
1.
Apply the fault condition, including START of CSPRBRF, 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.
If “No I> check” or “
Retrip off” is set, only back-up trip can be used to
check set
IP>.
7.3.10.2
Checking the residual (EF) current operate value
IN> set below IP>
GUID-72ACBA0D-73F7-4F10-B8E1-E40F877F5478 v3
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/
CSPRBRF(50BF)CSPRBRF:1.
1.
Apply the fault condition, including start of CSPRBRF , with a current just below set
IN>.
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.
7.3.10.3
Checking the re-trip and back-up times
GUID-9EF98997-03F2-4FF6-BD93-7FD98CDE0550 v2
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/
CSPRBRF(50BF)/Current/CSPRBRF:1.
1.
Apply the fault condition, including start of CSPRBRF, well above the set current value.
Measure time from start of CSPRBRF.
2.
Check the re-trip
t1 and back-up trip times t2.
3.
Disconnect AC and start input signals.
Section 7
1MRK 505 293-UEN B
Testing functionality
58
Breaker protection REQ650
Commissioning manual
© Copyright 2013 ABB. All rights reserved
Summary of Contents for REQ650 1.3 IEC
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