Operation
7.14 Derating
SINAMICS DCP
358 Operating Instructions, 09/2019, A5E34382853K
Temperature derating
The available continuous current is limited as a function of the air intake and power unit
temperatures.
The lower value from the two characteristics is active.
Reducing the available continuous current as a function of the internal air intake temperature
For an internal air intake temperature (p52050[5]) of between 45 °C and 60 °C, the available
continuous current linearly decreases from 100 % of the rated current down to 60 %.
Figure 7-79 Current derating as a function of the internal air intake temperature
The temperature thresholds for the internal air intake temperature can be reduced down to
20 °C using p55101[0]:
Figure 7-80 Example for temperature threshold reduction - internal air intake temperature
For an internal air intake temperature above 45 °C, alarm A60502 is output; below 43 °C it is
again reset. Also this threshold can be reduced using p55101[0].
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