Electrical Connection - Siemens 1MB115 Installation And Maintenance Manual

Electrical connection

Observe the following when carrying out any work on the machine:
• Comply with the general safety instructions.
• 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air clearances are no longer maintained.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.
4.1 Preparations
4.1.1 Selecting cables
Take the following criteria into account when selecting the connecting cables:
• Rated current
• Rated voltage
• If required, service factor
• System-dependent conditions, such as ambient temperature, routing type,
cable cross-section as defined by required length of cable, etc.
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