Cooling Circuits For Stainless Steel Heatsinks - Siemens SINAMICS S120 Equipment Manual

8.1.2

Cooling circuits for stainless steel heatsinks

To ensure an optimum heatsink service life, please note the following recommendation for
stainless steel heatsinks (Power Modules FL and GL, Active Line Modules GXL, Motor
Modules FXL and GXL):
• Open or semi-open cooling circuit made of stainless steel or ABS which transfers heat to
a recooling system via a water-to-water heat exchanger.
• Cooling circuit pipes, fittings made of ABS, stainless steel (Nirosta) or common steel
(ST37).
grey cast iron
>3 m
Dirt trap,
≤ 100 µm
Fig. 8-2 Recommendations for an open cooling circuit
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Unit 1,
Pump,
stainless
steel
heatsink
P
Cooling circuit and coolant properties
Motor,
stainless steel or
equivalent corrosion-
proof or corrosion-
protected metals
Hose
8.1 Cooling circuits
8-5