Instruction manual – AQ 110 arc protection unit
51 (80
)
AQ101 (all units at busbar B):
I/O
Function
S1
Monitoring of arc light in outgoing feeder cable
compartment for selective tripping (Zone 3B)
S2
Monitoring of arc light in outgoing feeder breaker
compartment and busbar compartment (Zone 2B)(*)
BO1
Sending light information to AQ 110 unit of incoming
feeder 2
BI1
Receiving overcurrent information from AQ 110 unit of
incoming feeder 2
BI2
Receiving master trip information from AQ 110 unit of
incoming feeder 2
T1
Trip of outgoing feeder circuit breaker CB4B-x in case
of activation of S1 and BI. Also performing master trip in
case of fault in Zone 2B.
T2
Not in use
T3
Not in use
T4
Not in use
SF
System failure dry contact for alarming
*Sensor channels S3, S4 and S5 may be utilized if more sensors are required
in Zone 2B
