Arc Protection With Several Ref 610 Relays And One Rea 101 - ABB REF 610 Technical Reference Manual

1MRS 755535
5.2.3.
Feeder Protection Relay
Technical Reference Manual - ANSI Version

Arc protection with several REF 610 relays and one REA 101

When realizing an arc protection with both REF 610 relays and an REA 101 (see Fig.
5.2.3.-1), the cable terminations of outgoing feeders are protected by REF 610 relays
using one lens sensor for each relay. The busbar and the incoming feeder is protected
by the sensor loop of the REA 101.
On arc detection at the cable terminations, REF 610 will trip the circuit breaker of
the outgoing feeder. However, on detection of an arc on the busbar, REA 101 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.
52
52
DI1
Q3 52 52
Fig. 5.2.3.-1 Arc protection with REF 610 and REA 101
HSO2
REA 101
HSO1 TRIP3
Fiber sensor loop
DI1 DI1
52
REF 610
DI1
52
145