Maintenance
Maintenance plan
GE Information08- 2016 L51- 004EN/07
3/8
Maintenance operations
Guide
The table below is a guide of the operations to be carried out at each
maintenance stage:
(M1) MAINTENANCE VISITS (1 or 2 times a year)
(M2) INSPECTION (every 5 years)
(M4) OVERHAUL (OPERATING TIME: 20 years)
(M4) OVERHAUL (MECHANICAL OPERATIONS: 3 000
cycles)
(M4) OVERHAUL (ELECTRICAL WEAR: see
“Electrical wear limits”)
■ ■ ■ ■ ■
Operation counter reading.
■ ■ ■
Overall inspection: appearance (corrosion,
paintwork, signs of overheating).
■ ■ ■ ■ ■
Check operation of permanent heating. Check
condition of air vents.
■ ■ ■
If the circuit- breaker is fitted with an SF
6
dial
densimeter or a pressure gauge, check SF
6
pressure (or SF
6
+CF
4
gas mixture).
■
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
control circuits are working properly.
■ ■
Check SF
6
densimeter thresholds. Then adjust
pressure to its rated value.
■ ■ ■
Check tightening of parts not subjected to pressure
(frame - deck - cubicle).
■ ■ ■ ■
Check tightening of low voltage terminals (* 6
months after commissioning).
■ ■ ■
Check relay operation.
■
Change door seal, side panels seal and roof seal.
■ ■ ■ ■
Measure operating times for poles and auxiliary
contacts.
■ ■ ■ ■
Carry out operations at recommended duties and
rated voltage.
■ ■
Change (or recondition) interrupting chambers.
■
Check that the damper piston for the opening of the
control presents no oil leak.
Continued on next page.
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