ABB REF610 - Arc Protection with Several REF610 Relays

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Fig. 6.2.1.-1 Arc protection with one REF610
6.2.2. Arc protection with several REF610 relays
When using several REF610 relays (see Fig. 6.2.2.-1), a REF610 protecting an
outgoing feeder will trip the circuit breaker of the outgoing feeder when detecting an
arc at the cable terminations. If the REF610 protecting the outgoing feeder detects
an arc on the busbar (via the other lens sensor), however, it will generate a signal to
the REF610 protecting the incoming feeder. On detection of the signal, the REF610
protecting the incoming feeder will trip the circuit breaker of the incoming feeder
and generate an external trip signal to all REF610 relays protecting outgoing
feeders, which in turn will result in tripping of all circuit breakers of outgoing
feeders.
For maximum safety, the REF610 relays can be configured to trip all circuit
breakers, regardless of where the arc is detected.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
REF610REF610
1MRS755535