Siemens SINAMICS S150 NEMA, Operating Instructions Manual, Page: 741 / 862

Maintenance and servicing
11.3 Servicing
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
739
11.3 Servicing
Servicing involves activities and procedures for maintaining and restoring the specified
condition of the device.
Required tools
The following tools are required for replacing components:
● Standard set of tools with screwdrivers, screw wrenches, socket wrenches, etc.
● Torque wrench, 13 lb.in to 885 lb.in (1.5 Nm to 100 Nm)
● 23.6 inch (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, cable lugs) and other connections (ground
connections, protective ground connections, steel threaded connections).
Table 11- 1 Tightening torques for screw connections
Thread Ground connections, protective
ground connections, steel threaded
connections
Aluminum threaded connections,
plastic, busbars, cable lugs
M3 11.5 lb.in (1.3 Nm) 7.1 lb.in (0.8 Nm)
M4 26.5 lb.in (3 Nm) 15.9 lb.in (1.8 Nm)
M5 53.1 lb.in (6 Nm) 26.5 lb.in (3 Nm)
M6 88.5 lb.in (10 Nm) 53.1 lb.in (6 Nm)
M8 221.3 lb.in (25 Nm) 115.5 lb.in (13 Nm)
M10 442.5 lb.in (50 Nm) 221.3 lb.in (25 Nm)
M12 778.9 lb.in (88 Nm) 442.5 lb.in (50 Nm)
M16 1903 lb.in (215 Nm) 1018 lb.in (115 Nm)
Note
Screw connections for protective covers
The screw connections for the protective covers made of Makrolon may only be tightened
with 22.1 lb.in (2.5 Nm).