Basler Electric BE1-BPR - Manual (Page 124)

5-18 BE1-BPR BESTlogic Programmable Logic 9272000990 Rev J
CUSTOM APPLICATION EXAMPLES
Breaker Failure Logic for Breakers with Pre-Insertion Resistors (BFRES)
BFRES logic is an example of an adaptive breaker resistor protection scheme that allows more time for
the fault to clear once the breaker resistor has reduced the fault current. For more information, refer to
Section 2, Breaker Failure Protection with Pre-Insertion Resistors.
Figure 5-10. BFRES Logic Diagram
LN=BFRES
LI6=4,12 LOA=T4+O15 ∗ LO9=0
LF1=PI,1 LI7=4,12 LO1=T1O7+T2F3 LO10=0
LF2=NI,1 LR=0,0,0,0,0 LO2=T1O7+T2F3 LO11=0
LF3=PI,2 LT1=D,O8,/O8 LO3=T1O7+T2F3 LO12=F3I1
LI1=4,12 LT2=D,O8,/O8 LO4=O14
LI2=4,12 LT3=0,0,0 LO5=O8
LI3=4,12 LT4=D,O6,/O6 LO6=/I1/I2
LI4=4,12 LT5=0,0,0 LO7=F1+F2
LI5=4,12 LT6=0,0,0 LO8=I3+I4+I5
∗
The non-maskable alarms ORed with the programmable diagnostics to provide an alarm output.