ECO-ECP MANUAL January 2012 revision 30
32
Gli interventi di manutenzione sul
generatore Mecc Alte si possono
dividere in ordinari e straordinari; in ogni
caso qualsiasi intervento deve essere
autorizzato dal responsabile della
sicurezza, a macchina ferma e isolata
elettricamente dall’impianto o dalla rete.
La manutenzione e la ricerca guasti
deve essere eseguita da personale
e l e t t r i c a m e n t e / m e c c a n i c a m e n t e
qualificato in quanto ogni operazione a
seguito descritta presenta pericoli per il
personale.
Si raccomanda inoltre che siano prese
tutte le precauzioni per impedire che la
macchina venga riavviata inavver-
titamente durante le fasi di manuten-
zione e ricerca guasti.
Gli interventi di manutenzione ordinaria
possono essere riassunti in :
a) verifiche condizioni avvolgimenti
dopo lunghi periodi di immagaz-
zinamento o di sosta
b) verifiche, ad intervalli regolari, del
corretto funzionamento (assenza di
rumori o vibrazioni anomale)
c) verifiche meccaniche su tutti i bulloni
di fissaggio ed in particolare delle
connessioni elettriche
d) pulizia esterna del generatore
a) Verifiche condizioni avvolgimenti
dopo lunghi periodi di immagaz-
zinamento o di sosta.
La condizione degli avvolgimenti può
essere verificata mediante la misura
della resistenza di isolamento verso
terra. Tale misura si esegue con uno
strumento “Megger” o similari a 500V di
tensione continua; è importante che
prima di eseguire la prova, il regolatore
di tensione (fig. a), il ponte diodi rotante
(fig. b), i filtri anti disturbi radio (fig. c) e
tutti gli eventuali dispositivi connessi
elettricamente agli avvolgimenti da
verificare, vengano scollegati.
MANUTENZIONE
MAINTENANCE
Maintenance operations on Mecc Alte
generators can be divided into routine
and extraor dinar y maintenanc e
operations; in both cases, all
operations must be authorised by the
safety representative and they must be
carried out when the machine is turned
off and insulated from the electric
installation or from the power mains.
High-qualified mechanical or electrical
t e c h n i c i a n s m u s t c a r r y o u t
maintenance operations and any fault
search since all operations described
hereunder could put personnel in
serious danger.
It is also highly recommended to take
all the necessary precautions so as to
prevent an inadvertent starting of the
machine during maintenance and fault
search operations.
Routine maintenance operations can
be summed up as follows:
a) Assessment of windings conditions
after long periods of storage or
inactivity
b) Assessment, on a regular basis, of
correct functioning (absence of
anomalous noises or vibrations)
c) Mechanical inspections on all
fastening bolts and, in particular, on
electric connections
d) external cleaning of generator
a) Assessment of w indings
conditions after long periods of
storage or inactivity.
Measuring the insulating earth
resistance can assess the condition of
the windings. This measurement can
be carried out with a “Megger” device,
or similar, with a 500V direct-current
voltage. It is very important to
disconnect the voltage regulator (fig.
a), the rotating diode bridge (fig. b) and
the radio-interference filter (fig. c), as
well as any other device connected to
the windings to be checked, before
carrying out the measurement.
fig. a
fig. b
fig. c
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