Siemens SIROTEC Device Manual

Maintenance and servicing
6.3 Servicing the cabinet
Cabinet Modules NEMA
Manual, 04/2014, A5E03586450A
251
Tightening torques for screw connections
The following tightening torques apply when tightening current-conducting connections (DC
link connections, motor connections, busbars, cable lugs) and other connections (ground
connections, protective conductor connections, steel threaded connections).
Table 6- 1 Tightening torques for screw connections
Thread
Ground connections, protective
conductor connections, steel
threaded connections
Aluminum threaded connections,
plastic, busbars, cable lugs
M3
1.3 Nm
0.8 Nm
M4
3 Nm
1.8 Nm
M5
6 Nm
3 Nm
M6 10 Nm 6 Nm
M8
25 Nm
13 Nm
M10 50 Nm 25 Nm
M12
88 Nm
50 Nm
M16
215 Nm
115 Nm
Note
Screw connections for protective covers
The screw connections for the protective covers made of Makrolon may only be 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 retightened if necessary. 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.

Siemens SIROTEC Specifications

General

Brand	Siemens
Model	SIROTEC
Category	DC Drives
Language	English