Assembling the circuit-breaker pole
Overhaul Instructions
24
1HSB435409-201 enrev1
8.2 Treatment of sealing surfaces and seals
Clean, degrease and inspect all sealing surfaces in connection with assembly.
N. B. Sealing grooves and other sealing surfaces must not have lateral scratches.
Any small scratches on sealing surfaces can be polished with a fine
abrasive, e.g. Scotch Brite. Polishing shall take place along the sealing
line but never across it.
When re-assembling the circuit-breaker, replace all seals with new ones.
Grease sealing surfaces and seals sparingly to facilitate the seal’s union against the
surface and as corrosion protection. Excess grease that can squeeze out on flanges in
the gas chamber must not occur.
Coat flange surfaces outside the outer seal with a thin, well-covering layer of anti-
corrosion agent matched to the flange material in question, usually Grease ”G”
(ABB art. No. 1171 4014-407).
Degreasing and cleaning material:
• Alcohol.
Lubricating material for seals:
• Grease “G” for static seals
Grease “S” for moving seals, e.g. shaft seals.
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