Operation On An Isolated-Neutral System (It System) - Siemens SINAMICS S120 Manual

Support with the mechanical control cabinet design is available from:
Siemens AG
Digital Factory, DF MC MF - WKC AS
TCCCC (Technical Competence Center Cabinets Chemnitz)
Postfach 1124
09070 Chemnitz
E-mail: cc.cabinetcooling.aud@siemens.com
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
(applicable to a height of 450 mm and width of 300 mm).
Note
Machine manufacturers can adapt the heat sink version to their special requirements. The
specified rated data for the Power Modules can only be achieved if the power losses can be
dissipated by the external heat sink under the specified general conditions.
NOTICE
Damage to the cold plate caused by incorrect mounting
The threaded bolts can damage the cold plate when it is being mounted.
• Do not damage the cold plate.
4.8.7

Operation on an isolated-neutral system (IT system)

To operate a 100 kW Basic Line Module on an isolated-neutral (IT) system, the connection
bracket for the interference suppression capacitor must be removed. The connection bracket
is located on the lower side of the component.
Note
Connection bracket to the interference suppression capacitor has not been removed
If the connection bracket for the interference suppression capacitor is not removed, an error
message might be output via the insulation monitor in the system.
Booksize Power Units
Manual, (GH2), 07/2016, 6SL3097-4AC00-0BP8
Line Modules Booksize
4.8 Basic Line Modules with cold plate
257