Electrical connection
6.1 Connecting the machine
1MB..1/2/3/4 - shaft heights 63 ... 355
70 Operating Instructions, 06/2020, A5E44455710A
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Fastening elements can work loosely, so that the minimum air clearances are no longer
maintained.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.
6.1 Connecting the machine
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.
● Configuration notes
● Requirements according to IEC/EN 60204-1
● Dimensioning for bundled cable routing, e.g. according to DIN VDE 0298 Part 4 or
IEC 60364-5-52
● 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 fittings (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-specific conditions – e.g. ambient temperature, routing
method etc. - according to DIN VDE 0298 and/or EN / IEC 60204-1.
The technical specifications 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
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