Description and Functionalities
Description of the breaking chamber
P12--1001EN/02
1/2
01--2011
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GRID
Presentation
Extinguisher
environment
The extinguisher environment is SF
6
gas under pressure or, exceptionally,
amixofSF
6
gas +CF
4
under pressure.
Principle of breaking
The breaking chamber is thermal blowing by arc energy type, with
auxiliary auto--pneumatic effect.
Description
The breaking chamber was designed to increase the mechanical and
electrical endurance of the active part and take advantage of the benefits
of the low wear of the contacts subjected to the arc in the SF
6
. The active
part is enclosed in a sealed ceramic envelope, for insulation between the
input and the output of the circuit breaker.
The chamber is comprised of the following components :
1
1
6
8
9
7
3
5
2
4
Mark Component
1 Power supply terminal
2 Rod--side contact holder
3 Main contacts
4 T ulip--side contact holder
5 Envelope
6 Arc contact tulip
7 Arc contact rod
8 Insulating nozzle
9 Valve
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