Maintenance
Maintenance plan
G51--001EN07
14/18
02--2011
© ALSTOM 2010. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be
relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is
provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is
strictly prohibited.
GRID
Detail of circuit--breaker maintenance operations
, continued
CAUTION : INSPECTION CANCOMMENCEONLY AFTER THECAPACI-
TOR HAS BEEN DISCHARGED AND EARTHED IN A DURABLE WAY.
IF THESE SAFETY INSTRUCTIONS ARE IGNORED, THE PERSONNEL
MAY BE ENDANGERED.
Capacitors
(if applicable)
Check condition of capacitors as follows :
D
clean capacitor insulating surfaces using a dry cloth,
D
check tightening torque of capacitor mountings on the flange of the enclo-
sure, if need be, change sealing washers,
D
make sure that there are no traces of oil or moisture on the capacitors,
D
check the braid connection between the capacitor and the circuit-breaker
casing.
Current transformers
(if applicable)
Check condition of transformers as follows :
D
clean transformer insulating surfaces using a dry cloth,
D
check electrical connections on CT terminal blocks and cubicle,
D
check attachment of CT to the enclosure, tightening to supporting stud
torque.
D
inspect, where applicable, the CT’s braid connection to the mainconductor,
for CT with an electrostatic shield.
Potential
transformers
(where applicable)
Check condition of potential transformers as follows :
D
clean potential transformer insulating surfaces using a dry cloth,
D
check electrical connections on PT terminal blocks and cubicle,
D
check attachment of potential transformer, tightening torque,
D
inspect, the attachments of the braid connection of potential transformer.
Lightning arrester
(where applicable)
Check condition of lighting arrester as follows :
D
clean lightning arrester insulating surfaces using a dry cloth,
D
check attachments of lightning arrester to the pole, tightening torque.
Tightness of
enclosure
(if applicable)
If the enclosure is under pressure, check the tightness of cover seals by ap-
plying a soap solution around the entire periphery of the cover.
Also check tightness of all the enclosure viewports.
Replacement of en-
closure cover seals
(if applicable)
Refer affected section “REPLACEMENT OF ENCLOSURE COVER
SEALS”.
Summary of Contents for FKG1X
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