Example Of Fan Group; Example For The Operating Time Of The Fan Units - ABB ACS2000 AFE 1MVA User Manual

CHAPTER 2 – POWER ELECTRONICS AND CABINET FEATURES
2.7.2 Function
—
References
Fan groups
—
For control reasons, the fan unit(s) of the drive and
2-16 Example of fan
group 1
the integrated transformer are combined to
—
groups, for example:
2-17 Example for the
operating time of the fan
• Fan unit 1 of the drive and fan unit 1 of the inte-
units
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.
Fan unit 1
Transformer
—
2-16
Fan 1 or fan group 1
Fan 2 or fan group 2
—
2-17
Drive
on
off
72 h
on
off
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.
For further information on settings for
the cooling system, see signal and
parameter table, section automatic con-
verter-fan change-over.
Fan unit 1
72 h
24 h
46
24 h