Arc Protection With Several Ref610 Relays And One Rea101 - ABB REF610 Technical Reference Manual

REF610 REF610
6.2.3.
162
Feeder Protection Relay
Technical Reference Manual - ANSI Version
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Fig. 6.2.2.-1 Arc protection with several REF610 relays

Arc protection with several REF610 relays and one REA101

When realizing an arc protection with both REF610 relays and an REA101 (see
Fig. 6.2.3.-1), the cable terminations of outgoing feeders are protected by REF610
relays using one lens sensor for each relay. The busbar and the incoming feeder is
protected by the sensor loop of the REA101.
On arc detection at the cable terminations, REF610 will trip the circuit breaker of
the outgoing feeder. However, on detection of an arc on the busbar, REA101 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.
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A070054