Siemens SIMOTICS XP 1MB5 SH400, Руководство по эксплуатации, Страница: 158 / 166

Applications
The above-mentioned tightening torques apply for the following applications:
● Case A
Applies to electrical connections in which the permissible torque is normally limited by the
bolt materials and/or the current carrying capacity of the insulators, with the exception of the
busbar connections in case B.
● Case B
Applies to bolts screwed into components made from materials with lower property class
(e. g. aluminum) and to bolts with property class 8.8 according to ISO 898-1.
● Case C
Applies to bolts with property class 8.8, A4-70 or A4-80 according to ISO 898-1, however
only to bolts screwed into components made from materials with higher property class, e.g.
cast iron, steel or cast steel.
Note
Non-standard tightening torques
Different tightening torques for electrical connections and bolted connections for parts with
flat seals or insulating parts are specified in the relevant sections and drawings.
If no other tightening torques are specified, then the values in the following table apply.
Table B-2 Tightening torques for screws on the terminal box, end shields, screw-type grounding conductor connections
Thread ∅ M 3.5 M 4 M 5 M 6 M 8 M 10 M 12 M 16 M20
Nm min 0.8 2 3.5 6 16 28 46 110 225
max 1.2 3 5 9 24 42 70 165 340
Technical data
B.1 Tightening torques for screw and bolt connections
1MB5 SH 400/450
156
Operating Instructions, 05/2019, A5E45959221A