Electrical connection
6
6.1 Safety instructions relating to the electrical connection
Observe the following when carrying out any work on the machine:
● Comply with the general safety instructions (Page 11)
● Comply with the applicable national and sector-specific regulations.
● When using the machine within the European Union, comply with the specifications laid
down in EN 50110‑1 regarding safe operation of electrical equipment.
Risk of explosion by fixing elements becoming 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. Fastening
elements can work loosely, so that the minimum air clearances are no longer maintained.
Sparking formation may occur, in an explosive atmosphere it can lead to an explosion. This
could result in death, serious injury or material damage to the machine or even in failure, which
could in turn lead indirectly to material failure of 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.
DANGER
Hazardous voltages
Death, injury or material damage can occur. Note the following safety information before
connecting-up the machine:
● Only qualified and trained personnel should carry out work on the machine while it is
stationary.
● 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.
● Establish a safe 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, EN 60034-1).
1MB5 SH 400/450
Operating Instructions, 05/2019, A5E45959221A 63
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