Electrical connection
6.2 Safety instructions for the electrical connection
1LE7 shaft heights 71 ... 315
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Operating Instructions, 04/2022, A5E51689275A-AA
6.2
Safety instructions for the electrical connection
Hazardous voltages on electrical connections
Dangerous voltages can arise on electric motors. Death, injury or material damage can occur.
Observe the following safety information before connecting up the motor:
•
Only qualified personnel should carry out work.
•
Carefully follow the "5 safety rules (Page 11)".
•
Disconnect the motor from the power supply and take measures to prevent it being
reconnected. This also applies to auxiliary circuits.
•
Check that the motor really is in a no-voltage condition.
•
Ensure that there is a safe and reliable protective conductor connection before starting
any work.
•
If the incoming power supply system displays any deviations from the rated values in
terms of voltage, frequency, curve form or symmetry, such deviations will increase the
temperature and influence electromagnetic compatibility.
•
Operating the motor on a line supply system with a non-grounded neutral point is only
permitted over short time intervals that occur rarely, e.g. the time leading to a fault being
eliminated (ground fault of a cable, IEC/EN 60034-1).
Material damage as a result of connection parts coming loose
If you use fixing elements made from the wrong material or apply the wrong tightening
torque, this could impair current transfer or cause connecting parts to become loose. This
could result in material damage to the motor or even in total failure, which could in turn lead
indirectly to material damage to the system.
•
Tighten the screwed connections to the specified tightening torques.
•
Observe any specifications regarding the materials from which fixing elements must be
made.
•
When performing servicing, check the fastenings.
Note
Service Center
If you require support when electrically connecting up the motor, please contact the Service
Center (Page 117).
