Basler BE1-BPR, Инструкция по эксплуатации

Страница: 27 / 148

BE1-BPR Application 2-13
Breaker Failure Logic 1 For Standard Relays (BFL1)
BFL1 logic provides the following application features:
1. Three-Pole Tripping BF Logic (No input or output latch-in provided). Three BFI inputs are available at
IN3, IN4, and IN5 to start delay timer T1. If the BFI inputs are not reset by the time timer 1 times out and
either the phase (F1) or neutral (F2) fault detector is picked up, then BFO1 and BFO3 will close (OUT1
and OUT3), tripping the backup breakers. Refer to the breaker failure timing diagram in Section 1 for
information on setting the delay timer.
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 that case two additional BFI inputs are available (IN6 and IN7)
to start delay timer T2. These inputs are not supervised by a fault detector. If the BFI input is not reset
by the time the timer times out, BFO2 (OUT2) will close tripping the backup breakers. Refer to the
breaker failure timing diagram in Section 1 for information on setting the delay timer.
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. Retrip Output. A Retrip output is provided to give a backup trip signal to the breaker trip coil. This can