Description and operation
Description of circuit breaker pole
G12--109EN03
2/4
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
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strictly prohibited.
GRID
Mechanism casing,
moving part section
Diagram
4
10
5
8
7
A
9
6
11
Circuit--breaker
Closed
Table of
the components
The following table lists the components both within and around the casing:
Mark
Component
Function
4
Insulated mounting
Provides CB phase/earth insulation
5
3--pole operating shaft Transmits movement between the operat-
ing mechanism and the poles
6
Operating lever
Transmitsthemovement to the interrupter
chamber’s mobile contact (11)
11
Moving contact
Used to let the rated current flow.
7
Breaking disk
Safety system – guards against overpres-
sure in the chamber
8
SF
6
liaison
Used to connect the SF
6
to the poles.
9
Molecular sieve
Agent used to absorb the gaseous break-
down of SF
6
.
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