Cooling Circuit For Aluminum Heatsink - Siemens SINAMICS S120 Equipment Manual

8.1.1

Cooling circuit for aluminum heatsink

To ensure an optimum heatsink service life, please note the following recommendation for
aluminum heatsinks (Basic Line Modules FBL and GBL, Active Line Modules HXL and JXL,
Motor Modules HXL and JXL):
• Closed 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).
Pressure-relief
valve
Closed
pressurizer
Pump, gray
cast iron
Controller
Bypass
valve
optional
Inspection glass
Dirt trap,
≤ 100 µm
T secondary
Fig. 8-1 Recommendations for a closed cooling circuit
Chassis Power Units Liquid Cooled
SINAMICS S120 Equipment Manual, Edition 12/2007, 6SL3097-2AM00-0BP4
Device 1,
aluminium or
stainless
steel heat
sink
P
T primary
inlet
Heat exchanger,
copper
Cooling circuit and coolant properties
Motor,
aluminium
and gray
cast iron
Hose
8.1 Cooling circuits
T primary
return
8-3