FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in a circuit breaker that can switch between the on position and off position, so that in the off position an interruption path is formed, which includes an arcing space. Technical result is achieved by the circuit breaker has a storage volume for a quenching gas, which is in gaseous communication with the arcing space, and the storage volume has an inlet for the quenching gas, wherein, in addition, a valve is provided in the inlet, which contains an obturator, which has a heat-insulating coating.
EFFECT: reduction of the possibility of deformation of the storage volume for storing gas.
18 cl, 3 dwg
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