WEGeuro - Indústria Eléctrica, S.A. Português - English
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5.4 The rotors of the motors are dynamically balanced with half key. For this reason the
coupling to be fitted to the motor shaft end also has to be balanced with half key,
according to the standard IEC 60034-14. When specifically requested the rotors can
be balanced with full key.
5.5 To fit the coupling on the shaft end extension, the coupling shall be heated up to
approximately 80ºC.
If necessary, this assembly operation can be aided by means of a screw in the
threaded hole of the shaft end.
Note – Never assemble the coupling by hitting, as it could cause serious damage to
bearings.
5.6 In the case of direct coupling the motor and the driven machine shall be aligned
according to the parallel and angular alignment values established by the coupling
manufacturer, not forgetting that the more precise the alignment, the longer will be the
life of the bearings.
In the case of belt drive transmissions they must be static conductive, flame resistant
and self-extinguishing. The pulleys shall neither be too narrow or wider than the width
of the shaft end. The tension of the pulleys shall also be taken into account; it shall not
be higher than the values of radial loads recommended for bearings. If these
specifications are not followed, there is a serious risk of collapse of the bearings or
even the shaft.
5.7 The ambient temperature limit range of WEGeuro motors for gas group IIB and I
(mines) is from -55ºC to +80ºC. The motors for gas group IIC can operate for ambient
temperature between -55ºC up to +60ºC. Unless different engraved on nameplate,
these motors are prepared to work on ambient temperatures from -20ºC up to +40ºC.
For temperatures out of the range -20ºC to +40ºC, the factory shall be contacted to
analyse if a special execution and/or certification is required.
5.8 Unless otherwise specified, the rated power outputs of the motors are considered for
continuous duty operation S1, according to IEC/EN 60034-1 Standards and under the
following conditions:
- For ambient temperatures from -20ºC to +40ºC;
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