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Electrical connection
6.1
Safety instructions for the electrical connection
Comply with the following when carrying out any work on the machine:
• Comply with the general safety instructions (Page 15).
• Comply with the applicable national and sector-specific regulations.
• When using the motor within the European Union, comply with the specifications laid down
in EN 50110‑1 regarding safe operation of electrical equipment.
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.
• Disconnect the machine from the power supply and take measures to prevent it being
reconnected. This also applies to auxiliary circuits.
• Check that the machine 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 machine 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 machine 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.
• Always carefully check the fastenings when carrying out service work.
1LE1, 1FP1/3, 1PC1/3 shaft height 63 ... 315
Operating Instructions, 11/2023, A5E38483075A
6
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