Instruction manual – AP901S Arc Protection Unit
18 (43
)
A1027A
Logic Scheme 5
The AP901S scheme 5 is used in single busbar arc protection solution. Sensors are
monitoring section circuit breaker and the busbar between the section circuit breaker. BI1
and BI2 receive MT signal from both incoming AP910P units. BI3 and BI4 receive
overcurrent information from both incoming AP910P units. BO1 and BO3 sends detected
arc fault information from busbar and section CB to both incoming AP910P units.
Figure 3-6: AP901S logic scheme 5
General trip logic for AP901S (SS: 5)
TRIPPING SIGNALS
FAULT LOCATION
T1
T2
T3
BO1
BO2
BO3
S1
╳
╳
╳
╳
S2
╳
╳
╳
╳
╳
S3
╳
╳
╳
╳
S4
╳
╳
╳
╳
Summary of Contents for AP901S
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