WEGeuro - Indústria Eléctrica, S.A. Português - English
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6.13 Before the motor start-up, the supply connection shall be checked if they have been
made according to the diagrams of this manual or supplied inside terminal box, taking
in consideration the type of motor and winding.
6.14 Unused cable entries of main terminal box, auxiliary terminal box and bearing
thermal protections, must be closed with ATEX / IECEx certified threaded plugs
with the same protection (Ex d or db IIB, Ex d or db IIC, Ex e or eb II, Ex d or db I or
Ex e or eb I) of the terminal boxes.
6.15 Motors with flying leads must be connected out of hazardous area or with an
approved protection way or system.
6.16 Motors fitted with angular contact ball bearings should not be allowed to run at no
load and must be used in the mounting form IM engraved on the nameplate (see IM in
the nameplate).
6.17 Motors with sleeve bearings (not foreseen for IIC group) must be directly coupled to
the driven machine. The pulley/belt drive system is not recommended for this type of
motor. These motors cannot be used for ambient temperature higher than +60ºC.
When the motor is coupled to the driven machine take care to the axial float of the
motor sleeve bearing, of driven machine as well as the maximum axial tolerance of the
coupling.
This type of motors are not allowed in any circumstances to work with axial thrusts on
the sleeve bearings as they are not designed to support this kind of loads.
In the standard motor design the rotor is not self-aligned and it has a maximum axial
play of ± 3mm from the mechanical centre. The mechanical centre is the midpoint
between the rotor end float limits.
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