ABB ACS880-204LC, Hardware Manual

Page: 28 / 278

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.
￭ Line-up charging switch
The supply unit can be equipped with a charging switch for AC-DC line-up charging [Q3].
￭ 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.
￭ Charging switch for unit charging
Before closing the DC switch-disconnector [Q11], the user closes the charging switch for
DC-DC unit charging [Q10]. After the precharging completes, the DC switch-disconnector
[Q11] can be closed, and the charging switch [Q10] opened.
Note:
The charging switch [Q10] must be opened before the supply unit can be started.
WARNING! Do not operate the DC switch-disconnectors under load.
WARNING! Do not operate the DC fuse disconnectors under load or under voltage.
WARNING! With frame n×R8i units, both the DC switch-disconnector [Q11] and
the charging switch [Q10] must be opened to disconnect the inverter unit from the
DC link.
￭ DC switch-disconnector for line-up charging
The supply unit can be equipped with a DC switch-disconnector for line-up charging [Q40].
DC switch-disconnector [Q40] is needed for isolating the line-up charging circuit from the
DC link when the supply unit has the DC switch disconnector [Q11] and AC-DC line-up
charging circuit.
28 Operation principle and hardware description