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, Kalt = 1,2 *10 = 12% di derating; In derated = 100 - ((12*100)/100) = 88 % In
(4) Kf : 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 specic 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
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