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Careful and correct storage of flameproof motors is important and should not be overlooked

function, and that every flameproof joint which was der no circumstances should motors be installed in
exposed during storage is free of corrosion, dirt, boxes or covered with materials that may impede
scratches or visible damage, and protected against or reduce free air circulation for cooling purposes.
corrosion. Bearings should be lubricated with the The requirements for machine foundations can be
type of grease indicated on the nameplate. found, for example, in DIN 4042-1, where defined
Correct motor handling is critical, not only to avoid limits are specified for natural foundation frequency
damage, but to guarantee personal safety. Only when relating to the motor’s speed frequency,
use the eyebolts supplied (or integral lifting holes) double-speed frequency and line frequency. Poor
to gently lift and lower the motor. To avoid motor foundation dimensioning can induce vibration in
tilting during handling, proper tools must be used the motor that may be amplified by the motor’s
to adjust the lifting point to the motor’s centre of own natural frequencies. When designing the mo-
mass. Failure to do so can cause the fan cover to tor base, it is also important to understand that the
hit the ground before the motor feet, subsequently motor can be occasionally subjected to torques hi-
damaging the exterior fan. gher than the rated torque.

Ensure strict installation Correct motor handling is
requirements are adhered to critical, not only to avoid
“damage, but to guarantee
Electrical motors must be installed in locations with personal safety
easy access for inspection and maintenance. Un-

Cinque suggerimenti per assicurare in sicurezza

lo stoccaggio, la gestione e l’installazione

di motori antideflagranti

I motori antideflagranti sono ampiamente utilizzati in tutte quelle industrie in cui siano presenti
atmosfere esplosive. L’installazione e l’uso corretti di questi motori sono essenziali al fine di
massimizzare l’aspettativa di vita delle macchine che operano in ambienti pericolosi e ridurre al minimo
i tempi di inattività e i costi di manutenzione. Anche lo stoccaggio è essenziale, in quanto, se non viene
gestito in modo adeguato, potrebbe danneggiare i componenti del motore e ridurne significativamente
la durata. In questo articolo, WEG delinea cinque suggerimenti per garantire la corretta conservazione,
gestione e installazione dei motori antideflagranti.

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Impiantistica Italiana - Luglio-Agosto 2019 103