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Hitachi Energy Ltd

Tomas Roininen

Lars Hermansson

Benny Wedin

Stefan Valdermarsson

Per Olof Thuresson

Kent Kirjonen

Lars Jeppsson

Leif Persson

A conductor arrangement for a circuit breaker interrupter, the conductor arrangement including: a tubular body conductor including a first metal material, and an at least partly tubular contact conductor including a second metal material; wherein a tubular end portion of the tubular body conductor is mechanically and electrically joined with a tubular end portion of the tubular contact conductor in an circumferential overlap region formed by longitudinally press-fitting one of the tubular body conductor and the tubular contact conductor into the other one of the tubular body conductor and the tubular contact conductor, wherein the outer one of the tubular end portions of the tubular body conductor and the at least partly tubular contact conductor at the overlap region includes copper and the inner one includes aluminum.

Hybrid current path for circuit breakers

The invention relates to a circuit breaker, preferably for high or medium voltage. The movable conact of each breaker pole is connected, via mechanical means for transmitting movement, to a movable part of an electric motor (). The movable contact and the means for transmitting movement are arranged in a gas-tight apparatus chamber () surrounded by a gas-tight apparatus housing () of insulating material such as porcelain. In accordance with the invention the motor () is arranged entirely in the apparatus chamber (). The invention also relates to an electric plant provided with the breaker claimed, uses of the breaker claimed and a method of breaking electric current in which the breaker claimed is used.

Circuit breaker

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Saxdalen, Sweden

Tomas Roininen