ABB ACS800-17LC, Hardware Manual

Page: 49 / 182

Hardware description
43
Control of the supply unit
As standard, the user controls the supply unit solely by the operating switches on the
cabinet door (start/stop). The door switches are connected to the I/O interface of the
supply unit at the factory. The wiring may not be changed by the user. In most cases,
the user does not need any other means to control the supply unit. However, it is
also possible to control the supply unit with the control panel or through a fieldbus.
The use of the panel is possible when the panel is not needed for the control of the
inverter, for example during a start-up or testing of the supply unit. The fieldbus
control is possible when the control unit of the supply unit has been equipped with an
optional fieldbus adapter module.
For more information on the control through the fieldbus, see the appropriate
firmware manual.
Main switch-disconnector Q1 (frames R7i+R7i and R8i+R8i)
The switch-disconnector handle switches the main and auxiliary voltages to the drive
on and off.
Supply transformer disconnecting push button (+Q959)
The red push button disconnects the control voltage from the supply transformer
breaker. The push button is added on the cabinet door at the factory by ABB. The
installer of the drive must wire the button to the breaker control circuit on the
installation site.
Operating switch
Auxiliary power switch Q100 (frame sizes 2×R8i and up)
The auxiliary power switch controls all auxiliary voltages in the cabinet including the
DC link charging circuit. The auxiliary power switch must be closed before the drive
can be started.
Grounding switch Q9 (F259)
When closed, the optional grounding switch connects the supply phases L1, L2 and
L3 to PE. The switch is interlocked with the main contactor/breaker control circuit:
0 Stops the supply unit and the drive, opens the main contactor/breaker and
stops the cooling fans.
1 Keeps the main contactor/breaker closed and the supply unit in operation (on
command. Normal operation.
S Charges the intermediate DC circuit before closing the main contactor/
breaker and starts the cooling fans.
0
1
S