Description and operation
General descrip tio n of the circuit--breaker
L12--016EN/01
2/6
06--2003
E ALSTOM
Pole of the circuit--breaker
Description
The pole of the circuit--breaker is made up with three main components :
D The interrupting chamber (1).
D The support column (2).
D The housing of the mechanism (3).
Diagram
2
1
5
5
3
3
4
7
Interrupting
chamber
The pole is comprised of an interrupting chamber (1) in a ceramic or compos-
ite envelope -- laid out vertically -- equipped at each end with an HV terminal
(5).
Support column
Consisting of one or two ceramic or composite insulators, the support column
(2) allows the circuit--breaker to be ground--insulated and it also encloses the
operating tie--rod which is attached to the interrupting chamber’s moving con-
tact.
Housing of the
mechanism
A housing (3) -- situated at the base of the column -- contains the lever and
crank assembly and which operates the moving contact.
The SF
6
filling and monitoring device (7) is also situated on the housing.
An external cylinder (4) mechanically links the pole to the operating device.
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