Risk of explosion by xing elements becoming loose
If you use xing 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elements can work loosely, so that the minimum air clearances are no longer maintained.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 to indirect material damage of the plant or system.
• Tighten the screwed connections to the specied tightening torques.
• Only use the xing accessories provided or only the original spare parts from Siemens.
• Always carefully check the fastenings when carrying out service work.
See also
Tightening torques (Page169)
6.1 Connecting the machine
6.1.1 Safe connection
• Carefully comply with the information provided in EN / IEC 60034-1 (VDE 0530-1) regarding
operation at the limits of A and B zones, especially in respect of temperature increase and
deviation of the operating data from the rated data stamped on the rating plate. Do not
exceed these limits. Do not use machines in zone B that are marked for zone A.
• Connect up so that a permanently safe electrical connection is guaranteed (no protruding
wire ends); use the assigned cable-end ttings (e.g. cable lugs, end sleeves).
Connect up the line supply voltage and arranged the disconnecting link in accordance with
the circuit diagram provided in the terminal box.
• Select the connecting cables in accordance with DIN VDE 0100 taking into account the rated
current and the installation-specic conditions – e.g. ambient temperature, routing method
etc. - according to DIN VDE0298 and/or EN/IEC60204‑1.
The technical specications stipulate the following that have to be taken into account with
respect to the motor connection:
• Direction of rotation
• The number and arrangement of the terminal boxes.
• The circuit and connection of the motor winding
Electrical connection
6.1Connecting the machine
1MB..1/2/3/4 - shaft heights 63 ... 355
78 Operating Instructions, 11/2023, A5E52779900A
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