Abb Technology Ag

Abb Research Ltd.

Patrick Huguenot

Stephan Grob

Jean-Claude Mauroux

Thomas Schoenemann

Max Claessens

Xiangyang Ye

Markus Keller

Jochen Kiefer

Zoran Andjelic

The disclosure relates to an electrical switching device, e.g., a generator circuit breaker, and to a method for improved switching-gas cooling. Gas jets are formed by a nozzle body in the exhaust area, are directed against a baffle wall and are swirled. The baffle wall is a component of the switching chamber enclosure and has a high thermal capacity and/or thermal conductivity, so that the switching gas vortices produce a highly efficient switching gas cooling on the baffle wall by turbulent convection. Exemplary embodiments relate inter alia to the design of the baffle wall and of the nozzle body. Advantages include: protection of the switching chamber enclosure against hot gases, improved switching gas cooling, and increased breaking capacity.

Generator circuit breaker with improved switching capacity

A contact finger module for mounting in a high-power switchgear includes at least one contact finger having a contact piece and a flexible contact piece support, which extends along a longitudinal direction and has an attachment end and a contact-making end. The contact piece overhangs the contact piece support in the opposite direction to a deflection direction, and is connected to the contact piece support at the contact-making end. The contact finger module includes at least one leaf spring, which extends along the longitudinal direction and has an attachment end at which it is connected to the attachment end of the contact piece support in the mounted state. The leaf spring can produce a force that counteracts deflection of the contact piece in the deflection direction. In the mounted state, the leaf spring can extend in the longitudinal direction at least as far as the center of the extension of the contact piece in the longitudinal direction.

Contact finger for a high-power switchgear

Growing community of inventors

Zurich, Switzerland

Patrick Huguenot