104
ADV200 WA • Quick start up guide - Specification and installation
m increase above 1000 m (up to a maximum of 2000 m).
I.e.: Altitude 2000 m, K
alt
= 1,2 *10 = 12% di derating; I
n
derated = 100 - ((12*100)/100) = 88 % I
n
(4) K
f
: Derating factor for higher switching frequency
If not all of the derating factors are considered, this could result in a drive overtempera-
ture condition.
The specific alarm indicates this condition and normal drive operation is stopped.
Note!
In Light Duty mode the switching frequency is fixed at 4 kHz. No derating factor is therefore applied to the
switching frequency.
Note!
If, in the Heavy duty mode, the factory setting of
Switching freq mode
(PAR: 568) is changed from
0=Fixed to 1=Variable, the switching frequency is controlled by the temperature of the drive heat sink
and the output frequency. For further information see the Functions and Parameters manual, menu 4.9.
Caution