PO3
PO1
SO1
DI1
DI1 DI1DI1DI1
SO1 SO1 SO1 SO1
52
52 52
52
52
52
A070054
Fig. 6.2.2.-1 Arc protection with several REF610 relays
6.2.3. 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.
162
REF610REF610
Feeder Protection Relay
Technical Reference Manual - ANSI Version
1MRS755535
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