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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 outgoing feeders, which in turn results in tripping of all circuit
breakers of the outgoing feeders.
A040364-ANSI V1 EN
Figure 374:
Arc flash detector with several protection relays and a separate arc flash
detector system
4.9.6
Signals
Table 644:
AFD Input signals
Name
Type
Default
Description
I_A
SIGNAL
0
Phase A current
I_B
SIGNAL
0
Phase B current
I_C
SIGNAL
0
Phase C current
I_G
SIGNAL
0
Residual current
Table continues on next page
1MAC059074-MB A
Section 4
Protection functions
615 series ANSI
747
Technical Manual
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