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28 Operation principle and hardware description
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Charging switch
The charging switch [Q3] is a standard device.
To charge the drive, the charging switch must be closed. The charging switch does not
control the charging circuit, it just provides power to the charging circuitry. The charging
circuit is controlled by the charging contactor [Q4], which is controlled by the control unit.
The charging switch has an operating handle on the cabinet door.
￭
Operating switch
The operating switch [S21] is a standard device.
By default, the operating switch controls the unit as follows:
•
The ENABLE/RUN position: The control program closes the charging contactor [Q4]
and the main DC link is charged. After the DC link is charged, the main contactor [Q2]
is closed and the charging contactor [Q4] opened. The supply module starts operating.
•
The OFF position: The control program opens the main contactor and the supply module
stops rectifying.
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ACS-AP-x control panel
With the control panel, you can:
•
start and stop the supply unit with the start and stop keys of the panel (in local control
mode of the panel)
•
view and reset the fault and warning messages, and view the fault history
•
view actual signals
•
change parameter settings
•
change between local and external control.
The Run enable command at digital input DI2 must be on (1) so that the supply unit can be
started and stopped with the control panel in the local mode. That is the case when the
operating switch [S21] is switched to the on (1) position.
To change between local and remote control mode, press the Loc/Rem key of the control
panel. For the instructions on the use of the panel, see ACX-AP-x Assistant control panels
user's manual (3AUA0000085685 [English]). For the parameter settings, see the firmware
manual.
￭
Local charging control switch
The cabinet can be equipped with a local charging control switch [S4]. Position "1" enables
closing of the DC switch-disconnector [Q11].
￭
DC switch-disconnector
The supply unit can be equipped with a DC switch-disconnector [Q11] which allows the
isolation of the unit from the DC link. Before the unit is reconnected to the DC link, the
capacitors of the supply module(s) must be charged through a charging circuit.
Note:
If the unit consists of multiple supply module cubicles, each cubicle is equipped with a DC
switch-disconnector and charging circuit. The DC switch-disconnector controls only the
supply modules within that particular cubicle.
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