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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