Instruction manual – AP901S Arc Protection Unit
20 (43
)
A1027A
Logic Scheme 7
The AP901S scheme 7 is utilized in selective arc protection solution. The point sensor S1
monitors the outgoing feeder cable compartment. S2 is used for monitoring the
corresponding feeder breaker compartment. S3 and S4 monitor the busbar compartment.
The contact T1 is responsible for tripping circuit breaker of the outgoing feeder. BI3 receives
overcurrent information from the AP910P of incoming feeder. BO1 sends light information
to AP910P of incoming feeder when there is any arc fault detected by AP901S.
Figure 3-8: AP901S logic scheme 7
Summary of Contents for AP901S
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