Tandem Operation; Speed Limits For Converter Operation - Siemens SIMOTICS SD Operating Instructions Manual

Preparing for use
4.13 Converter operation
①
②
③
Figure 4-2
NOTICE
Bearing damage
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 couple 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.
4.13.6

Speed limits for converter operation

Observe the information on the rating plate regarding the speed limits for converter operation.
48
Driven machine
Motor
Coupling
Schematic representation of a tandem drive
④
Insulated bearings
⑤
Insulated tachometer fitting
⑥
Insulated coupling
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A