Breaker Failure Protection Ccrbrf (50Bf); Checking The Phase Current Operate Value, Pickup_Ph; Checking The Residual (Ground Fault) Current Operate Value Pickup_N Set Below; Pickup_Ph - ABB Relion 650 Series Commissioning Manual

Section 7
Testing functionality
7.3.7

Breaker failure protection CCRBRF (50BF)

Prepare the IED for verification of settings as outlined in
Values of the logical signals for CCRBRF (50BF) are available on the local HMI under Main menu/
Tests/Function status/Current/CCRBRF(50BF)/1:CCRBRF. The Signal Monitoring in PCM600
shows the same signals that are available on the local HMI.
The Breaker failure protection function CCRBRF (50BF) should normally be tested in conjunction
with some other function that provides an initiate signal. An external INITIATE signal can also be
used.
To verify the settings in the most common back-up trip mode
phase-to-ground faults.
At mode
where the return current is connected to the summated current input. The value of residual
(ground fault) current IN set lower than
4 .
7.3.7.1 Checking the phase current operate value,
Check the current level
3 or 2 out of 4 as set under Main menu/Settings/IED Settings/Current/CCRBRF(50BF)/
1:CCRBRF.
1. Apply the fault condition, including INITIATION of CCRBRF (50BF), with a current below set

Pickup_PH .

2. Repeat the fault condition and increase the current in steps until a trip occurs.
3. Compare the result with the set
4. Disconnect AC and INITIATE input signals.
7.3.7.2 Checking the residual (ground fault) current operate value
below
Check the low set
BuTripMode = 1 out of 4 as set under Main menu/Settings/IED Settings/Current/CCRBRF(50BF)/
1:CCRBRF.
1. Apply the fault condition, including INITIATION of CCRBRF (50BF), with a current just below
set
2. Repeat the fault condition and increase the current in steps until trip appears.
3. Compare the result with the set
4. Disconnect AC and INITIATION input signals.
50
2 out of 4 the phase current setting, Pickup_PH can be checked by single-phase injection
IP> where setting FunctionMode = Current and setting BuTripMode = 1 out of
Note! If NoIPickupcheck or Retrip off is set, only back-up trip can be used to
Pickup_PH .
check set
Pickup_PH
Pickup_N current where setting FunctionMode = Current and setting
IN>Pickup_N .
© Copyright 2011 ABB. All rights reserved
6.1"Preparing the IED to verify
Pickup_PH is easiest checked in back-up trip mode 1 out of
Pickup_PH
Pickup_PH .
Pickup_N .
1MRK 511 248-UUS A
1 out of 3 , it is sufficient to test
Pickup_N set
Bay control REC650
Commissioning manual
M12104-2 v8
settings".
M12104-23 v6
M12104-80 v6