Siemens SINAMICS S120 Manual page 271

Tightening torques for screw connections
The following tightening torques apply when tightening connections of operating current-
conducting parts (DC link/motor connections, general busbars), non-operating current-
conducting parts (ground connections, ground terminal connections), and general steel
threaded connections.
Table 6- 1
NOTICE
Screw connections for protective covers
The threaded connections for the protective covers made of Makrolon may only tightened
with 2.5 Nm.
Cable and screw terminals
Cable and screw terminals must be checked regularly to ensure that they are securely in
position and, if necessary, retightened. Cabling must be checked for defects. Defective parts
must be replaced immediately.
Note
Maintenance intervals
The actual intervals at which maintenance procedures are to be performed depend on the
installation conditions (cabinet environment) and the operating conditions.
Siemens offers its customers support in the form of a service contract. For further details,
contact your regional office or sales office.
Cabinet Modules
Manual, 03/2013, A5E03263538A
Tightening torques for screw connections
Thread Ground connections, protective
conductor connections, steel
(conducting fault currents)
M3
M4
M5
M6
M8
M10
M12
M16
threaded connections
1.3 Nm
3 Nm
6 Nm
10 Nm
25 Nm
50 Nm
88 Nm
215 Nm
Maintenance and servicing
6.3 Servicing the cabinet
Plastic, busbars (operating current-
conducting)
0.8 Nm
1.8 Nm
3 Nm
6 Nm
13 Nm
25 Nm
50 Nm
115 Nm
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