Arc Protection With Several Ref 610 Relays - ABB REF 610 Technical Reference Manual

REF 610
5.2.2.
142
Feeder Protection Relay
Technical Reference Manual

Arc protection with several REF 610 relays

When using several REF 610 relays (see Fig. 5.2.2.-1), a REF 610 protecting an
outgoing feeder will trip the circuit breaker of the outgoing feeder when detecting
an arc at the cable terminations. If the REF 610 protecting the outgoing feeder
detects an arc on the busbar (via the other lens sensor), however, it will generate a
signal to the REF 610 protecting the incoming feeder. On detection of the signal, the
REF 610 protecting the incoming feeder will trip the circuit breaker of the incoming
feeder and generate an external trip signal to all REF 610 relays protecting outgoing
feeders, which in turn will result in tripping of all circuit breakers of outgoing
feeders.
For maximum safety, the REF 610 relays can be configured to trip all circuit
breakers, regardless of where the arc is detected.
Q1
3l
Q2
Q3 Q4
DI1
3I+Io 3I+Io
SO1
Fig. 5.2.2.-1 Arc protection with several REF 610 relays
DI1
M1
SO1
PO3
PO1
DI1 DI1
3I+Io
SO1
1MRS 755310
Q5 Q6
DI1
3I+Io
SO1 SO1