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Technical Manual delphi series motors rev.14
page 11 of 74
collegamento elettrico
Le operazioni di collegamento alla rete elettrica
(valide anche per circuiti ausiliari) devono essere
effettuate in ottemperanza alle seguenti prescrizioni:
•
qualunque operazione sull’impianto deve essere
effettuata da personale addestrato;
̀
•
il motore deve essere disattivato ed isolato;
̀
•
assicurarsi che non sia possibile un riavvio
accidentale;
̀
•
accertarsi dell’assenza di tensione;
̀
•
dove la rete non sopporta la corrente
d’inserimento diretto, il motore può essere
avviato mediante un commutatore stella-
triangolo. Ciò può avvenire soltanto nei motori il
cui collegamento degli avvolgimenti per la
tensione nominale è triangolo.
̀
•
l’allacciamento deve essere effettuato in modo
tale da garantire un collegamento elettrico
duraturo e sicuro;
•
assicurare il corretto dimensionamento dei cavi
di alimentazione
̀
•
assicurarsi che nella scatola collegamenti non
siano presenti nè corpi estranei, né sporcizia o
umidità. Chiudere i pressacavi non utilizzati e
serrare bene il coperchio della scatola
coprimorsettiera per prevenire la penetrazione
di polvere ed acqua;
̀
•
nel caso di motori dotati di freno (serie AT..),
verificare il corretto funzionamento del freno
prima della messa in servizio;
̀
•
il cambio del senso di rotazione si può ottenere
intercambiando le due fasi.
electrical connection
The operations for the connection to the electric
network (valid for auxiliary circuits, too) must be
performed in compliance with the following
indications:
•
any operation on the plant must be run by
trained personnel;
•
the motor must be disabled and isolated;
•
make sure that a casual start can not occur;
•
make sure that there is no voltage;
•
If the network does not sustain the direct input
voltage, the motor can be started by means of
a star/delta commutator, which is possible
only in motors where the connection of the
winding for rated voltage is delta.
•
the electric connection must be made in order
be long-lasting and safe;
•
assure correct dimensioning of power supply
cables
•
make sure that in the box for the connection
there is neither foreign bodies, nor dirty/humid
parts. Close the unused cable glands and tight
terminal box lid in order to prevent the
entrance of dust and water;
•
when testing without output components
secure the keyway;
•
in motors with brake (AT.. series), please
verify the brake switching before the starting
process;
•
you can change to counter-rotation an be
obtained by interchanging the two phases.
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