Maintenance - Siemens SINAMICS S120 Equipment Manual

Ventilation
The ventilation openings in the devices must never be obstructed. The fans must be checked
to make sure that they are functioning correctly.
Cable and screw terminals
Cable and screw terminals must be checked regularly to ensure that they are secure in
position, and if necessary, retightened. Cabling must be checked for defects. Defective parts
must be replaced immediately.
Note
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.
12.3.1

Maintenance

Servicing involves activities and procedures for maintaining and restoring the operating
condition of the devices.
Required tools
The following tools are required for replacing components:
● Standard set of tools with screwdrivers, screw wrenches, socket wrenches, etc.
● Torque wrench, 1.5 Nm to 100 Nm (13.3 ... 885 lbf in)
● 600 mm extension for socket wrenches
Tightening torques for screw connections
The following tightening torques apply when tightening current-conducting connections (DC
link connections, motor connections, busbars, lugs) and other connections (ground
connections, protective conductor connections, steel threaded connections).
Table 12- 1
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
Tightening torques for screw connections
Thread Ground connections, protective
conductor connections, steel threaded
M3 1.3 Nm (11.5 lbf in)
M4
M5
M6 10 Nm (88.5 lbf in)
M8
M10
M12
12.3 Service and maintenance for Chassis format components
connections
3 Nm (26.6 lbf in)
6 Nm (53.1 lbf in)
25 Nm (221 lbf in)
50 Nm (443 lbf in)
88 Nm (779 lbf in)
Service and maintenance
Aluminum threaded connections,
plastic, busbars, lugs
0.8 Nm (7.1 lbf in)
1.8 Nm (15.9 lbf in)
3 Nm (26.6 lbf in)
6 Nm (53.1 lbf in)
13 Nm (115 lbf in)
25 Nm (221 lbf in)
50 Nm (443 lbf in)
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