Tandem operation
If you connect two motors in series in "tandem operation", install an insulated coupling between
the motors.
①
Driving machine
④
Insulated bearings
②
Motor
⑤
Insulated tachometer fitting
③
Coupling
⑥
Insulated coupling
Figure 4-3
Schematic representation of a tandem drive
NOTICE
Rolling bearing damage due to bearing currents
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.
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.
4.16.5
Speed limits for converter operation
Observe the information on the rating plate regarding the speed limits for converter operation.
4.17
Electromagnetic compatibility
Note
If the torque levels are very unequal (e.g. when a reciprocating compressor is being driven), a
non-sinusoidal machine current will be induced whose harmonics can have an impermissible
effect on the supply system and cause impermissible interference emissions as a result.
Preparing for use
4.17 Electromagnetic compatibility
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A
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Summary of Contents for SIMOTICS XP 1MB5 SH400
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