Q1
Q2
M1
Q3 Q4 Q5 Q6
3I, Io
S1 S2 S3 S4
3I, Io3I, Io 3I, Io3I, Io
Ethernet switch
Binary horisontal
GOOSE connection
HSO1
HSO2
REF 615 REF 615 REF 615 REF 615
REF 615
Figure 394: Arc protection with several protection relays and high-speed outputs
and GOOSE
Arc protection with several protection relays and a separate arc protection
system
When realizing an arc protection with both protection relays and a separate arc
protection system, the cable terminations of the outgoing feeders are protected by
protection relays using one lens sensor for each protection relay. The busbar and
the incoming feeder are protected by the sensor loop of the separate arc protection
system. With arc detection at the cable terminations, an protection relay trips the
circuit breaker of the outgoing feeder. However, when detecting an arc on the
busbar, the separate arc protection system trips the circuit breaker of the incoming
feeder and generates an external trip signal to all protection relays protecting the
Protection functions
1MRS757644 H
754 620 series
Technical Manual
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