Instruction manual – AQ 110 arc protection unit
55 (80
)
6.5.2
I/O
DESCRIPTION
AQ110P (Busbar A):
I/O
Function
IL1,IL2,IL3
Monitoring of phase overcurrent threshold level at
incoming feeder 1
Io
Monitoring of residual current threshold level at
incoming feeder 1
S1
Monitoring of arc light in incoming feeder 1 cable
compartment and bus-duct (Zone 1A)
S2, S3
Monitoring of arc light in incoming feeder 1
breaker compartment and incoming feeder
busbar compartment (Zone 2A)*
HSO1
Trip of incoming main circuit breaker CB1A in
parallel with T1.
HSO2
Sending master trip information to AQ101 unit at
busbar A
BO1
Sending overcurrent information to AQ 110 unit at
incoming feeder 2
BI1
Receiving overcurrent information from AQ 110
unit at incoming feeder 2
BI2
Receiving light information from AQ 101 unit of
busbar A
T1
Trip of incoming main circuit breaker CB1A in
case of fault in Zones 1A and 2A and in case of
CBFP(**) of circuit breaker CB3AB.
T2
Trip of upstream circuit breaker CB2A in case of
fault in zone 1A and in case of CBFP(**) of CB1A
T3
Trip of tie breaker CB3AB in case of fault in zone
2A
T4
Trip alarm (if in use)
SF
System failure dry contact for alarming
*Sensor channels S4 and S5 may be utilized if more sensors are required in
Zone 2A
**CBFP dipswitch must be set to ON position in order to activate the CBFP
function.
