Maintenance
Maintenance plan
L51--003EN/03
3/6
06--2004
E ALSTOM
Maintenance operations
Guide
The table below is a guide of the operations to be carried out at each
maintenance stage :
MAINTENANCE VISITS (1 or 2 times a year)
INSPECTION (every 5 years)
OVERHAUL (OPERATING TIME : 20 years)
OVERHAUL (MECHANICAL OPERATIONS : 3 000 cycles)
OVERHAUL (ELECTRICAL WEAR : see “Electrical wear
limits”)
J J J J J
Operation counter reading.
J J J
Overall inspection : appearance (corrosion, paintwork,
signs of overheating).
J J J J J
Check operation of permanent heating. Check condition
of air vents.
J J J
If thecircuit--breaker is fittedwith anSF
6
dial densimeter
or a pressure gauge, check SF
6
pressure (or SF
6
+CF
4
gas mixture).
J
It is advisable to perform at least 2 CO duty cycles per
year , when apparatus are scarcely used, in order to
check that circuit--breaker and associated controlcircuits
are working properly.
J J
Check SF
6
densimeter thresholds. Then adjust pressure
to its rated value.
J J J
Check tightening of parts not subjected to pressure
(frame -- deck -- cubicle).
* J J J
Check tightening of low voltage terminals (* 6 months
after commissioning).
J J J
Check relay operation.
J
Change door seal, side panels seal and roof seal.
J J J J
Measureoperatingtimesfor polesandauxiliarycontacts.
J J J J
Carry out operations at recommended duties and rated
voltage.
J J
Change (or recondition) interrupting chambers.
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