ABB ACS2000 AFE 1MVA - Example for the Operating Time of the Fan Units; Example of Fan Group

CHAPTER 2 – POWER ELECTRONICS AND CABINET FEATURES 46
2.7.2 Function
Fan groups
For control reasons, the fan unit(s) of the drive and
the integrated transformer are combined to
groups, for example:
• Fan unit 1 of the drive and fan unit 1 of the inte-
grated transformer belong to group 1.
• Fan unit 2 of the drive and fan unit 2 of the inte-
grated transformer belong to group 2.
The fan units of a group are always switched on
and off together.
Starting, stopping
The standard fan group 1 is switched on by the
control system of the drive when the charging of
the DC link is initiated. When the drive is stopped,
the fan group continues to run for a preset time
after the main power has been switched off and
the DC link voltage has decreased below a preset
value.
Operating intervals
Parameter setting allows to run one of the two
fans continuously, or to run the fans alternately in
adjustable intervals. The intervals are set with
parameters.
—
References
—
2-16 Example of fan
group 1
—
2-17 Example for the
operating time of the fan
units
—
2-16
Fan unit 1Fan unit 1
Transformer
Drive
!
For further information on settings for
the cooling system, see signal and
parameter table, section automatic con-
verter-fan change-over.
—
2-17
72 h72 h
24 h
24 h
Fan 1 or fan group 1
Fan 2 or fan group 2
on
on
off
off