Basler Electric BE1-BPR - Manual (Page 40)

2-16 BE1-BPR Application 9272000990 Rev J
closes, tripping the backup breakers. Refer to the breaker failure timing diagram in Section 1 for
information on setting the delay and control timers.
2. No Current BF Logic (No input or output latch-in provided). Some faults may not provide current to
the CTs (i.e. internal transformer failures). In this case, a BFI input is available (IN6) to start delay
timer T2. This input is not supervised by a fault detector. If the BFI input is not reset by the time the
timer times out, BFO2 (OUT2) closes, tripping the backup breakers. Refer to the breaker failure
timing diagram in Section 1 for information on setting the delay and control timers.
3. Trip Coil Status Monitor. Preprogrammed logic is provided using IN1 to provide breaker status and
IN2 for trip coil continuity. Refer to Application Data in this section for further details on the circuit
operation.
4. Breaker Arc Protection. Preprogrammed logic is provided using fault detector 3 (F3) for the MAF fault
detector, IN1 for breaker status and OUT4 for the arc detector output. Refer to Application Data in this
section for further details on the circuit operation.
5. Block Reclose Output. Preprogrammed logic is provided using breaker resistor protection output
(O13) to drive the block reclose (BR) output (OUT3). Refer to Application Data in this section for
further details on the circuit operation.
6. Retrip Output. A retrip output is provided to give a backup trip signal to the breaker trip coil. This can
either provide a separate path to a single trip coil or be hooked to the backup trip coil if available.
7. External Fault Trigger. The enhanced BE1-BPR relay provides the ability to save the COMTRADE
fault records for twelve events in memory at one time. An external fault trigger is provided to allow
other multiple units to record the same event.
8. Alarm Output. An alarm output is provided to signal relay failure or diagnostic alarm.
Figure 2-19. BFL1E Logic