Breaker Failure Protection Settings - NR Electric PCS-9611 Instruction Manual

[50BF.En_ReTrp] is the logic setting of re-trip function the breaker failure protection;
[50BF.Opt_LogicMode] is the setting for selecting the BFP criterion logic;
[BI_52b] is the binary input from the auxiliary normally closed contact of the circuit breaker;
"50BF.In_Init" is the initiation signal such as the external binary input trigger signal or the relay
tripping operation signal, and it can be configured through the PCS-Explorer configuration
tool auxiliary software.
The time setting of the breaker failure protection should be based on the maximum circuit breaker
operating time plus the dropout time of the current flow monitoring element plus a safety margin
which takes into consideration the tolerance of the time delay.
System Fault
Protection Trip Time

3.9.2 Breaker Failure Protection Settings

All the settings of the breaker failure protection are listed in the following table. For the information
about the common explanation of the settings, see Section 7.3.
No. Menu text
1 50BF.I_Set
2 50BF.t_Op
3 50BF.t_ReTrp
4 50BF.Opt_LogicMode
5 50BF.En
6 50BF.En_ReTrp
7 50BF.OutMap
8 50BF.OutMap_ReTrp
PCS-9611 Feeder Relay
Normal Fault Clearance Time
CB Open Time
Initiation 50BF
Total Fault Clearance Time with 50BF
Figure 3.9-2 Timing for a typical breaker failure scenario
The current s etting of the breaker failure
protection
The time setting of the breaker failure protection
The re-trip time setting of the breaker failure
protection
The setting for selecting the criteria logic of the
breaker failure protection
The logic setting of the breaker failure protection
The logic setting of the re-trip function of the
breaker failure protection
The output matrix setting of the breaker failure
protection
The output matrix setting of the re-trip function of
the breaker failure protection
Date: 2014-04-08
Reset CB I> Safety Margin
50BF Time Delay
Explanation
3 Operation Theory
CB Open Time
Adjacent CBs
Range Step
0.05In~5.0In 0.001A
0~100s 0.001s
0~100s 0.001s
1~4 1
0~1 1
0~1 1
0x00000 ~
1
0xFFFFF
0x00000 ~
1
0xFFFFF
3-37