Preparing for use
4.13 Converter operation
Standard motors SH 63 ... 355
Operating Instructions, 12/2018, A5E38483075A
43
The bearing insulation must not be bridged. Bearing currents can damage bearings.
• Do not bridge the bearing insulation for subsequent installation work, such as the
installation of an automatic lubrication system or a non-insulated vibration sensor.
• Please contact the service center if necessary.
Tandem operation
If you connect two motors in series in "tandem operation", install an insulated coupling
between the motors.
Insulated tachometer fitting
Figure 4-3 Schematic representation of a tandem drive
Bearing currents can flow if the coupling between the motors of the tandem drive is not
insulated. This can damage the DE bearings of both motors.
• Use an insulated coupling to link the motors.
4.13.5 Tandem operation
If you connect two motors in series in "tandem operation", locate a coupling between the
motors; this coupling should satisfy the Directive 2014/34/EU or the regulations that apply in
the country where the equipment is installed.
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