Siemens SINAMICS S120 Manual page 775

The characteristic curves for the pressure drop across the heatsinks as a function of
volumetric flow vary depending on the temperature and the Antifrogen N / water coolant mix.
Figure 13-3 Pressure difference as a function of volumetric flow
Operating pressure
The operating pressure must be set according to the flow conditions in the supply and return
lines of the cooling circuit. The required coolant flow rate per time unit must be set according
to the technical data of the components. The components are normalized to a rated pressure
of 70 kPa (for coolant type H
Layout of the components
The components should be arranged in the system in such a way that the overall length of
the supply and discharge lines is the same for every SINAMICS component.
Water cooling systems with series-connected SINAMICS devices are not permitted.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
O) via a baffle plate.
2
Cooling circuit and coolant properties
13.1 Cooling circuit requirements
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