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Interrupting chamber
Quenching medium
Interrupting principle
Diagram
Description
03- 2017
Description and operation
Description of the interrupting chambers
The quenching medium is pressurized SF
pressurized SF
+CF
gas mixture.
6
4
The interrupting chamber is of thermal blasting type, using the energy from
the arc, with an auxiliary autopneumatic effect.
1
5
The interrupting chamber has been designed in such a way as to increase the
mechanical resistance of the working part and take advantage of the low wear
rate of the contacts subjected to the arc in SF
in a leak tight ceramic envelope, providing insulation between the circuit-
breaker input and output.
The chamber is made up of the following elements :
Mark
Component
1
Envelope
2
Fixed contact support
3
Resistor insertion device
4
Moving contact
5
Resistor
6
Capacitor
GE Information
gas or - in particular instances -
6
3
2
. The working part is enclosed
6
Information
Can have a long creepage dis-
tance, depending on the pollution
level.
Supports the main contacts.
By- pass the resistor.
It is worked by the operating mech-
anism and contains the blasting
device.
Used for operation of lines, capa-
citor banks or reactors...
(depending on the apparatus)
4
6
L12- 109EN/03
2/4
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