Siemens SINAMICS S120 Equipment Manual page 258

Cooling circuit, coolant properties and protection against condensation
9.1 Cooling circuits
Figure 9-13 Pressure drop as a function of volumetric flow for Active Interface Module, frame size JIL
Dimensioning the cooling circuit
Recommendation for dimensioning the cooling circuit:
The differential pressure between the supply and return lines should be selected such that
the following applies:
The individual pressure drops Pi represent the pressure drops of components (heat
exchanger, piping, 70 kPa for the SINAMICS devices connected in parallel, valves, dirt traps,
pipe bends, etc.).
Danger to life as a result of electric shock due to incorrectly laid coolant lines
Incorrectly laid coolant lines can come into contact with live parts and components and can
result in danger to life as a result of electric shock.
• Lay coolant lines so that they cannot come into contact with live components. Maintain
• Mechanically secure the coolant lines and check that they have no leaks.
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WARNING
an insulating clearance (clearances and creepage distances) of > 13 mm.
Water-cooled chassis power units for common cooling circuits
Manual, 08/2017, 6SL3097-4AM10-0BP0