ABB REF 610 - Arc Protection with Several REF 610 Relays and One REA 101

PO3
PO1
Q2
3l
Q1
SO1
M1
DI1
Q4
DI1 DI1
Q6Q5
3I+Io
DI1
3I+Io 3I+Io
Q3
3I+Io
DI1
SO1 SO1 SO1 SO1
A040363
Fig. 6.2.2.-1 Arc protection with several REF 610 relays
6.2.3. 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.
158
REF 610REF 610
Feeder Protection Relay
Technical Reference Manual
1MRS755310