Figure 4-3 Schematic Representation Of A Tandem Drive - Siemens SIMOTICS HV M Operating Instructions Manual

Bridging the bearing insulation
Bridging an insulated bearing can result in an electric current flowing through the machine
enclosure and possibly through the coupling to the driven machine. When touched, this can
lead to death or serious injury as a result of electric shock, and bearing damage caused by
current flowing through the bearing.
● Use insulated couplings.
● Do not bridge the bearing insulation on the insulated bearing while the machine is
● Be sure not to damage the bearing insulation when carrying out installation work, e.g.
● Keep the insulation points clean.
● Observe the labels on the machine relating to the bearing insulation.
Tandem operation
If you connect two motors in series in "tandem operation", fit an insulated coupling between
the motor and the driven machine. It is not necessary to fit an insulated coupling between the
motors acting in tandem operation.
①
②
③
Figure 4-3
See also
Additional documents (Page 129)
SIMOTICS HV M 1RN76308PR900CG0-Z
Operating Instructions 07/2018
WARNING
operational.
when drilling holes, etc.
Driving machine
Motor
Insulated coupling
Schematic representation of a tandem drive
4.16 Converter operation
④
Insulated bearings
⑤
Insulated tachometer fitting
⑥
Shaft grounding
Preparations for use
37