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

REF 610 REF 610
6.2.3.
158
Feeder Protection Relay
Technical Reference Manual
Q1
3l
PO3
Q2
PO1
Q3 Q4
DI1
3I+Io 3I+Io
SO1
Fig. 6.2.2.-1 Arc protection with several REF 610 relays

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. 6.2.3.-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.
DI1
M1
SO1
Q5 Q6
DI1 DI1
3I+Io
SO1 SO1
1MRS755310
DI1
3I+Io
SO1
A040363