Merlin Gerin

Raymond Soboul

Gerard Menou

Jean-Marc Lehmann

Marcel Macaire

A puffer-type electrical circuit breaker is insulated by an SF6 insulating gas contained in a casing of moulded insulating material. The circuit breaker comprises a system of contacts, a pair of connection terminals electrically connected to the contacts by means of bushings passing through the wall of the casing in a perpendicular direction to the longitudinal axis, and means of fixing the casing to a metal support at ground or earth potential. The external lateral surface of the insulating casing comprises a plurality of longitudinal flanges designed to increase the creepage distance between the terminals and the support. The creepage distance value is greater than the distance in the air between the same parts.

Electrical circuit breaker with improved dielectric withstand

The invention relates to improving the dielectric withstand of a puffer circuit breaker having a main circuit arranged side by side with an arcing circuit inside a sealed insulating casing filled with an insulating gas SF6. The disconnection area arranged between the main contacts when the main circuit opens is located facing the breaking gap between the arcing contacts. The fixed main contact and the fixed arcing contact are at the potential of the upper terminal, being located at appreciably the same level on either side of the longitudinal axis of the casing.

Puffer type electrical circuit breaker having a high dielectric withstand

The invention concerns a draw-out circuit-breaker having high electrical performances. Each draw-in terminal clamp comprises at least one U-shaped guiding slide operating in conjunction with the edge of the associated contact terminal stab to lock the terminal clamp in the engaged position in a plane perpendicular to the engagement direction. A radiator is fitted inside the insulated enclosure secured to the bell-shaped cover.

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Autrans, France

Raymond Soboul