Maintenance
6.3 Corrective Maintenance
A5E01083943A AB
Siemens AG Operating Instructions 2.02 1FW4
85
● Case A
applies to electrical connections in which the permissible tightening torque is normally
limited by the bolt materials and/or the load-bearing capacity of the insulators (with the
exception of the busbar connections in case B).
● Case B
applies to bolts/screws of property class 5.6 (acc. to ISO 898-1) or to bolts in components
of lower strength (e.g. aluminum).
● Case C
applies to bolts/screws of property class 8.8 or A4-70 (acc. to ISO 898-1), but only in
screwed connections of higher strength (e.g. gray cast iron, steel or cast steel).
Please refer to the relevant sections and drawings for all other tightening torques (electrical
connections and bolted connections for parts with flat gaskets). [ID 78]
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