Nanni Q2400 Series, Руководство пользователя

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95
S08 ALTERNATOR
CLEANING AND LUBRICATION
Prior to approaching or touching the alternator, ensure
that it is not live and it is at room temperature; at this stage
it is possible to clean it on the outside using compressed
air.
CAUTION!
Never use liquids or water.
Do not clean th inside electric components with
compressed air , because this may cause short-circuits
or other anomalies.
For the lubrication of bearings, see table later in this
section.
MAINTENANCE
The alternators series NPE are designed to give a long
maintenance free working life.
CAUTION!
Before performing this operation, read the safety
requirements at the beginning of this Section.
Maintenance operations on the generators can be divided
into routine and extraordinary maintenance operations;
in both cases, all operations must be authorized 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 technicians must
carry out 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:
1. Assessment of windings conditions after long periods
of storage or inactivity
2. Assessment, on a regular basis, of correct functioning
(absence of anomalous noises or vibrations)
3. Mechanical inspections on all fastening bolts and, in
particular, on electric connections
4. External cleaning of generator
Extraordinary maintenance operations can be summed
up as follows:
1. Maintenance and replacement (if necessary) of
bearings
2. Cleaning of windings
3. Replacement of diode bridge
4. Replacement of exciter
5. Replacement of voltage regulator
6. Check of residual voltage