Converter Operation - Siemens SINAMICS G115D Operating Instructions Manual

Cable gland
NOTICE
Damage to the cable jacket
An excessively high tightening torque with a different cable jacket material will damage the
cable jacket.
When different cable jacket materials are used, apply a lower tightening torque.
For metal or plastic cable glands, please use the following tightening torques for direct
mounting. The O-ring cross-section is 2 mm.
Table 11- 15 Tightening torque for cable glands and blanking plugs
Thread size
M12 x 1.5
M16 x 1.5
M20 x 1.5
M25 x 1.5
11.2.11

Converter operation

Suitably shielded cables and EMC cable glands must be used to connect the motors.
The maximum length of the motor cables is 15 m (49 ft), see section Maximum permissible
cable length (Page 63).
Permissible voltage stress
NOTICE
Damage to the motor insulation
The motor insulation will be damaged by impermissible voltage peaks produced by
converters without an output filter.
Reduce the maximum motor voltage to uncritical values by using an output filter at the
converter.
For drives with G115D and EMC-adequate connection, the motor windings are designed to be
converter-suitable (against partial discharge).
Bearing currents
Additional bearing currents due to steep voltage edges when switching. Without output
filters, significant voltage variations can occur at the winding terminals. Make sure the drive
system is installed in accordance with EMC requirements.
Mechanical stress and grease lifetime
High speeds that exceed the rated speed and the resulting increased vibrations alter the
mechanical running smoothness and the bearings are subjected to increased stress. This
reduces the service life of the grease and bearings.
SINAMICS G115D distributed drive
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
Additional information on the SIMOGEAR geared motor
Tightening torque ±10%
Metal Plastic
Nm Nm
8 1.5
10 2
12 4
11.2 Specific data motor
Thread size Tightening torque ±10%
Metal
Nm
M32 x 1.5 18
M40 x 1.5
M50 x 1.5 20
M63 x 1.5
Plastic
Nm
6
417