Electrical connection
8.3 System integration
1FW68 radial segment motors
Configuration Manual, 08/2021, A5E51132930B AA
163
8.3.10
Shielding, grounding, and equipotential bonding
Important notes regarding shielding, grounding and equipotential bonding
Correct installation and correct connection of cable shields and protective conductors is
very important, not only for the safety of personnel but also for the interference emission
and interference immunity.
WARNING
Risk of electric shock!
Hazardous touch voltages can be present at unused cores and shields if they have not
been grounded or insulated.
•
Connect the cable shields to the respective housings through the largest possible
surface area. Use suitable clips, clamps or screw couplings to do this.
•
Connect unused conductors of shielded or unshielded cables and their associated
shields to the grounded enclosure potential at one end as minimum.
Alternatively:
Insulate unused conductors and their shields. The insulation must be able to
withstand the rated voltage.
Further, unshielded or incorrectly shielded cables can lead to faults in the drive
–
particularly the encoder
–
or in external devices, for example.
Electrical charges that are the result of capacitive cross coupling are discharged by
connecting the cores and shields.
NOTICE
Device damage as a result of leakage currents for incorrectly connected protective
conductor
High leakage currents may damage other devices if the stator segment protective
conductor is not directly connected to the Motor Module.
•
Directly connect the protective conductor PE of the stator segment to the Motor
Module.
For stator segments with power connectors for currents up to 66 A, the protective
conductor connection is integrated in the plug connector itself.
For stator segments with power connectors for currents higher than 66 A, then you
must use a separate conductor that is appropriately dimensioned
NOTICE
Device damage as a result of leakage currents for incorrect shielding
High leakage currents may damage other devices if the stator segment power cable
shield is not directly connected to the Motor Module.
•
Connect the power cable shield at the shield connection of the Motor Module.
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