HUW1
Series Intelligent Universal Circuit Breaker
34
8.6.2
Wiring diagram of the HUW1-2000 (and above) Dual Power Bus Coupler Controller
Control unit
Control unit
Circuit I incoming circuit breaker
Terminal number of 1QF
secondary circuit
Circuit II incoming circuit breaker
Terminal number of 2QF
secondary circuit
Circuit III (bus tie) circuit breaker
Terminal number of 3QF
secondary circuit
Control unit
Common
neutral
wire
Common
neutral wire
Common
neutral
wire
24/ Trip
detection
23/ Closing
detection
16/ Opening
output
15/ Closing
output
18/ Common
live wire
12/ Trip
detection
11/ Closing
detection
4/ Opening
output
3/ Closing
output
6/ Common
live wire
34/ Trip
detection
33/ Closing
detection
26/ Opening
output
25/ Closing
output
28/ Common
live wire
Dual power terminal panel
Supplementary explanation
Circuit II
Circuit I
Interpretation of symbols: 1QF indicates Circuit I breaker; 2QF indicates Circuit II breaker; 3QF indicates bus tie breaker; F indicates shunt strip; X indicates
closed electromagnet.
Note: Box I, II and III contain the terminal numbers of the circuit breaker secondary circuit, those outside the box are the corresponding terminal numbers of the
dual power bus coupler controller, and those outside the box are the user connections.
Important reminder: To ensure the normal operation of dual power supply products and prevent operation errors, the dual power controller products need to be
equipped with corresponding mechanical interlock devices.
Note 1: The generator starting signal control terminals 37, 38 (normally closed)
or 38, 39 (normally open) are wired by users themselves;
Note 2: If the closing electrical interlock is required, an interlock auxiliary switch
shall be connected in series between the closing output of the controller and the
closing electromagnet of the circuit breaker. The circuit on the dotted line is
wired by the user.
Closing electrical
interlock
Fire signal input (default 24 V/AC, DC)
Programmable relay 2
Programmable relay 1
Auxiliary source (24
–36 V, AC/DC)
Communication 485 A
Communication 485B
Auxiliary
Circuit III
Controller
Reserved
Closing/opening
Power supply
output
Power input
Feedback
detection
Communication
Reserved
Fire control
Reserved
Closing/opening
Power supply
output
Power input
Feedback
detection
Feedback
detection
Power supply
output
Closing/opening
Auxiliary source