5. MAINTENANCE
For safety purposes it is necessary that any testing or maintenance carried out on electrical machine are performed by
qualified and authorised personnel, and all operation must be performed when the machine is stopped, at ambient temperature and
disconnected from any supply source (including the auxiliary circuits such as the anti-condensation heaters). Furthermore all
measures must be taken to avoid restarting of gen-set during maintenance.
The environment in which the generator is put to work must be clean and dry.
In order to block the screws use Loctite® 243 thread-lock, ensuring that they are not dirty with oil/grease (if necessary use Loctite®
7063 or equivalent solvent).
ATTENTION! In the case of electrical connections, the Loctite® must not cover the electrical contact surfaces!
5.1 Inspection and maintenance intervals
Inspection and maintenance should take into account the importance of the plant ambient conditions (dust etc.) and operating
conditions.
As a general rule, the machine should be subjected to a first inspection after approx. 100 operating hours (in any case not more than 1
year) and subsequent inspections when performing maintenance on prime mover.
When performing inspection check that:
- The generator operates smoothly, without noise or irregular vibrations due to bearing deterioration.
- The operating data complies with that detailed on the rating plate.
- The air inlet openings are not obstructed.
- The supply cables show no signs of deterioration and connections are firmly tight.
- The electrical connections are in perfect condition (undamaged).
- Screws and nuts are firmly tightened.
For the above inspections it is not necessary to dismantle the generator, dismantling is only necessary when the bearings are cleaned
or replaced and in that occasion the following additional checks are required:
- Alignment.
- Insulation resistance.
- Tightening of all fixing bolts, screws and nuts.
Particular inspections should be carry out at given time steps.
Operation and tasks
Noise level
Ventilation
Vibrations
Fastening of screw elements
Terminals connections
(terminal block,TA,TV,AVR)
General clearness
Full inspection
Insulating resistance
Bearing lubrication
Bearing replace
Any deviations or changes found during inspection must be corrected immediately.
SIN.UM.017.11
Every 2 Months
Daily
1000
X
X
X
X
X
Every 4 Months
Every 12 Months
2000
4500
X
25
ENGLISH
Check dedicated sections
X
X
X
X