Ice AP901S, Instruction Manual

Page: 15 / 43

Instruction manual – AP901S Arc Protection Unit 15 (43
)
A1027A

Logic scheme 2
The AP901S scheme 2 is utilized in selective arc protection solution. S2 is used for
monitoring the incoming feeder breaker compartment. S3 monitors reserve busbar; S4
monitors the main busbar compartment. The contact T1 is responsible for tripping section
circuit breaker. T2 is responsible for tripping coupler circuit breaker. BI1 and BI2 are
responsible for recognizing the incoming circuit breaker position. BI3 receives overcurrent
information from the AP910P of incoming feeder. BI4, BI5 and BI6 are used for sending
light information from different location of the busbar. BO1, BO2 and BO3 send arc fault
information to incoming feeder units and intermediate units.
Figure 3-3: AP901S logic scheme 2
General trip logic for AP901S (SS: 2)
TRIPPING SIGNALS
FAULT LOCATION
T1 T2 T3 BO1 BO2 BO3
S2 ╳ ╳ ╳ ╳ ╳ ╳
S3 ╳ ╳ ╳ ╳
S4
╳ ╳ ╳ ╳ ╳