Siemens SINAMICS PERFECT HARMONY GH150 - Page 117

Screw type Soft materials S3
1
Hard materials S2
2
Hard materials S1
3
nm in - lb nm in - lb nm in - lb
M12 50.0 443 115.0 1020 88.0 779
M16 115.0 1020 270.0 2390 215.0 1900
1
Examples of soft materials are Cu, Al, CuZn cable entries, laminate materials, plastics, cast
resin post insulators, press nuts, welding nuts, blind rivet nuts, and cage nuts.
2
Hard materials S2 are materials with friction-enhancing washer components, e.g. a contact
washer.
3
Hard S1 materials include steel, for example.
Table 9-4 Tightening torques for screw terminals for copper cables without cable lug
1)
Screw type Set screws and
headless screws
Head screws with
slit
Head screws with
hexagon profile
nm in - lb nm in - lb nm in - lb
M2 - - -
M2.5 0.25 2.2 0.5 4.4 0.5 4.4
M3 0.3 2.7 0.6 5.3 0.6 5.3
M3.5 0.5 4.4 1.0 8.9 1.0 8.9
M4 0.8 7.1 1.3 11.5 1.3 11.5
M5 1.0 8.6 2.5 22.1 2.5 22.1
M6 1.3 11.5 3.0 26.6 3.5 31.0
M8 1.8 15.9 3.9 34.5 7.2 63.7
M10 - - 4.8 42.5 13 115
M12 - - - - 18 159.3
M16 - - - - 30 265.5
Observe the tightening torques of the terminal manufacturer and the test torques according to
DIN EN 60999-1, VDE 609-1
Maintenance
9.7 Repair
SINAMICS PERFECT HARMONY GH150 6SL38253AE412AA1-Z
Operating Instructions Rev.201910281231 EXAMPLE 117