Siemens Aktiengesellschaft

Jurgen Mentel

Jan Stroh

Walter Hertz

An improved arc quenching arrangement for a gas-flow circuit breaker apparatus of the type including a housing; a body of electrical insulation material disposed within the housing and forming an arc quenching gap therewithin; at least one gas flow canal disposed within the body of insulation material for directing a quenching gas from a space within the housing to the vicinity of the quenching gap; fixed and movable electrical contacts disposed within the housing adjacent the housing quenching gap; and a check valve disposed in the flow canal for permitting the flow of the arc quenching gas only from the space within the housing to the quenching gap formed by the body of insulation material. The improvement of the invention comprises the extension of the gas flow canal to the arc quenching gap formed by the body of insulation material and the disposition of the check valve at the end of the flow canal at the arc quenching gap. An improved arc quenching effect for large current flow is thereby achieved.

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Erlangen, Germany

Jurgen Mentel