Frequency With Which The Dc Link Is Precharged - Siemens SINAMICS S120 Manual

Special features for Line Modules with external air cooling
Note
Component failure due to the pollution of external heat sinks
For components with external air cooling, the fan and the heat sinks can accumulate a lot of
pollution. If the cooling air requirement is not provided by the filtered fan, the components
cannot output their specified power. This can cause the temperature monitoring function in
the components to respond.
• Check the fans and heat sinks for pollution at regular intervals and clean them when
necessary.
Note
Checking the seal
• After installation, check the seal on the rear of the device to ensure that it is tight.
• If required, use additional sealing.
Note
Using an installation frame
• Only use an installation frame when the cabinet has an unpainted metal surface.
4.2

Frequency with which the DC link is precharged

The frequency with which the DC link capacitance is precharged via the Line Module is
determined using the following formula:
The DC link capacitances of the individual components can be taken from the relevant
technical data.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
4.2 Frequency with which the DC link is precharged
Line Modules Booksize
153