9424200994 Rev U
Logic Connections
Breaker failure element logic connections are made on the BESTlogicPlus screen in BESTCOMSPlus.
The breaker failure element logic block is illustrated in Figure 64. Logic inputs and outputs are
summarized in Table 35.
Name
Logic Function
Block
50BFI
52BFI
Trip
ReTrip
Operational Settings
Breaker failure element operational settings are configured on the Breaker Fail (50BF) settings screen
(Figure 65) in BESTCOMSPlus. Settings ranges and defaults are summarized in Table 36.
BE1-11g
Figure 64. Breaker Failure Element Logic Block
Table 35. Logic Inputs and Outputs
Input
Disables the 50BF function when true
Input
Starts the 50BF timer when true
Input
Starts the 50BF timer when true
Output
True after the 50BF Delay Timer expires
Output
True when the 50BF Delay Timer is actively timing
Figure 65. Breaker Fail Settings Screen
Purpose
Breaker Failure (50BF) Protection
103
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