Page 111 - 74

equipment

For optimised operation, Electrical motors must be
ensure proper alignment with installed in locations with easy
other components “access for inspection and
To ensure optimised operation, besides a stable maintenance
foundation, motors must be properly aligned, while
components assembled at the shaft end need to
be balanced correctly. the nameplate and documentation, as poor cable
The coupling of a motor with a drive can be made selections may overheat and ignite the hazardous
by means of direct coupling, gearbox, or belt and atmosphere. For motors fi tted with an ‘Ex e’ termi-
pulley. Appropriate care should be taken according nal box, special care must be taken to avoid any
to type of coupling. For instance, it is mandatory looseness of cables in motor terminals by means
that belts operating in hazardous atmospheres of cable clamps, washers or any other methods
are not affected electrostatically. In addition, the specifi ed by the manufacturer.
mounting and dismounting of couplings must be Finally, motors fi tted with thermal protection de-
conducted using the proper tools to reduce dama- vices should have them properly connected and
ge at the shaft end. monitored as they can provide useful information
Clearly, the quality of power supply is essential and allow preventive actions in maintenance and
to maintain motor life expectancy and the he- repair procedures. Alarm and trip temperatures
alth of windings. Supply cables should be able to must be set according to manufacturer recom-
withstand motor voltage and current as stated on mendations.

Luciano Albertalli

Luciano Albertalli is the managing director of WEG Italia. With a background in electrical engineering,
he has over 25 years of experience in in electric motor and drive technology and has vast knowledge of
electric motor-driven systems across a range of industrial applications.

104 Impiantistica Italiana - Luglio-Agosto 2019
104