Alstom Technology Limited

Areva T&d Sa

General Electric Technology Gmbh

Steven Grosick

Wolfgang Grieshaber

Roger Ledru

Victor F Hermosillo

Andrew Chovanec

Nicklas Davison

James M Main

A gas exhaust diffuser for a circuit breaker, comprising a first casing extending longitudinally along a principal axis with an open end to allow gas to enter and a closed end, and a second casing coaxial to the first casing, extending along the principal axis, with at least one outlet to allow gas to escape, the closed end of the first casing being arranged in the second casing and the first casing having at least two radial openings near its closed end to provide a fluid communication between the first and second casing. A plurality of incurved elements are positioned radially in the second casing at the at least one radial opening to create a rotation of an entering exhaust flow in a plan perpendicular to the principal axis, thereby generating a substantially helicoidally-shaped exhaust flow path in the second casing.

Exhaust diffuser for a gas-insulated high voltage circuit breaker

A method of evacuating hot gases produced in a current breaking operation by a high voltage circuit breaker () which comprises a metal outer tank () filled with insulating gas, a casing () having gas outlet ports () and arranged inside the metal outer tank (), with which it is in communication via the said ports, characterized in that insulating gas (GI) is aspirated from inside the casing () in a direction parallel to the flow of the hot gases (GC) produced by the current breaking operation, so as to mix the gases inside the casing () before they are evacuated, through the said gas outlet ports () of the casing, into the interior of the metal outer tank (). The invention also relates to an associated high voltage circuit breaker, which includes means () for aspirating insulating gas from the interior of the casing (), in a direction parallel to the hot gas stream.

High voltage circuit breaker with improved gas exhaust

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Stockdale, PA, United States of America

Steven Grosick