Abb Research Ltd.

Alexander Steffens

Dietmar Gentsch

Martin Lakner

Daniel Chartouni

Jochen Kiefer

Kaveh Niayesh

The invention relates to a contact arrangement for a vacuum interrupter chamber (), which comprises a pair of inner contact pieces (), configured as RMF contact pieces, and a pair of outer contact pieces () which are connected in parallel and are mounted closely adjacent to the inner contact pieces (). At least one of the inner contact pieces () is movably mounted. The outer contact pieces () are also configured as RMF contact pieces. During interruption, the resulting electric arc can commutate completely or partially to the pair of outer contact pieces (). The inner contact pieces are substantially discoid. Advantageously, the contact pieces () are coaxially positioned in relation to each other. The outer contact pieces () are advantageously pot-shaped or tubular.

Vacuum interrupter chamber and contact arrangement for a vacuum circuit breaker

The vacuum switching chamber has two contact pieces and is provided with at least one heat pipe for dissipating heat. The heat pipe contains a working medium for dissipating the heat by evaporating the working medium in a section, referred to as the evaporator, of the heat pipe and condensing the working medium in a section, referred to as the condenser, of the heat pipe. Advantageously, the evaporator is in close thermal contact with at least one contact piece, and, in particular, at least part of the evaporator is integrated in the first contact piece or the second contact piece. Advantageously, the condenser has a cooling rib arrangement.

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Langenfeld, Germany

Alexander Steffens