Maintenance
Maintenance plan
G51--001EN07
11/18
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
Operation counter
Read indications given by the counter(s) and note these on the inspection
sheet ”Maintenance visits”.
The number of circuit--breaker operations recorded influences future mainte-
nance operations.
SF
6
pressure gas
For a circuit--breaker equipped with a ”dial--type” SF
6
gas densimeter, check
the position of the needle.
See the module “
SF
6
gas monitoring
”.
DILO
STAUBLI
NOTE
: If observation confirm ”topping up” information, proceed as
module ”Filling with SF
6
gas”, or in the case of abnormally low pres-
sure, find the origin of the leak and contact
ALSTOM Grid S.A. Cus-
tomer
.
Operating device
Air--vents should be clean, free of dust and unobstructed. If necessary clean
using a solvent.
Make sure that the permanent resistors areworking properly by checking that
these give off heat and that there are no overheating marks (a zone notorious
for this).
For thermally controlled resistors, check that energizing and de--energizing
takes place correctly at voltage supply terminals by means of a thermostat
(recommended thermostat temperature : +5
°
C).
If necessary, change resistors found to be defective.
Continued on next page.
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