Siemens SINAMICS S120 Equipment Manual page 95

Properties of the heat sink
AlMgSi 0.5 is recommended as the heat sink material.
The roughness of the external heat sink surface should be at least Rz 16 and the contact
surface between the heat sink and cold plate should have an evenness of 0.2 mm.
Note
The machine manufacturer can choose the right heat sink version for his special plant
requirements. The specified rated data for the Power Modules can only be achieved if the
power losses can be dissipated from the external heat sink under the specified general
conditions.
Notice
During installation, you must make sure that the threaded bolts do not damage the cold
plate.
Installation instructions
1. Before installation, check the surface of the heat sink to ensure that it is not damaged.
2. For installation, M6 screw bolts and hexagon nuts/threaded pins (ISO 7436-M6x40-14 H)
3. To improve heat transfer, a heat-conducting medium must be used. Special spherical-
4. The module is then fitted to the external heat sink.
5. The tightening torque for the screw connection is 10 Nm.
Equipment Manual Booksize Cold-Plate Power Sections
Manual, (GH4), Edition 06.2005, 6SL3097-2AJ00-0BP2
are recommended.
indented heat-conducting film must be used for this purpose. Each cold plate power
section is supplied with heat-conducting film cut to the right size. Note the installation
position of the heat-conducting film (see diagram above). To make it easier to attach the
heat-conducting film, the screw bolts/threaded pins should already be inserted in the
holes provided on the heat sink.
Note
When a module is replaced, the heat-conducting film must also be replaced.
Only heat-conducting film approved or supplied by Siemens can be used.
Smart Line Modules (5 kW and 10 kW) with cold plate
6.5 Installation
6-11