Siemens Aktiengesellschaft

Johannes-Gerhard Banghard

Stefan Losch

Werner Hartmann

Roman Renz

Erhard Deylitz

Michael Hahn

Klemens Fieberg

Joerg Baumgaertl

A low-voltage circuit breaker includes at least one switching-on catch for initiating a switching-on process, and at least one insertion mechanism, which has an insertion shaft, for insertion of the circuit breaker into the withdrawable frame, or for removal of the circuit breaker from the withdrawable frame. The low-voltage circuit breaker further includes at least one power-transmitting system, connected to the insertion shaft, and connectable to the switching-on catch such that the switching-on catch can be moved to an activated state from a deactivated state at a defined unloading position of the movement, and can be moved to a deactivated state from an activated state at a defined reset position in the movement.

Low-voltage circuit breaker

The invention relates to a contact arrangement for a vacuum switch tube for low-voltage power switches. The aim of the invention is to reduce the contact force required to control short circuit currents. To this end, a twin-contact contact arrangement is used wherein every contact comprises a plurality of separate individual contacts having a defined spring rate. At least one of the contact bodies () is configured as a two-layer spiral contact with a lower layer consisting of a highly elastic material and an upper layer () consisting of a highly electroconductive material. A contact coat () consisting of a contact material is provided on the upper layer in the outer zone of every contact arm ().

Contact arrangement for a vacuum switch tube

A retrofittable earthling device includes a first contact arranged on the switching device and a second contact arranged on the module frame by way of a contact carrier. They are adjacently spring-mounted, during the movement of the switching device from its point of separation into its operating position. In order to relieve the contact carrier, in one such device, of electrodynamic effects and thus to make the same easy to assemble, the contact carrier includes a first partial region for connecting an earthing device, and a second partial region which can be connected to the second contact, in addition to a contact strip connecting the two partial regions. The first partial region can be connected to the module frame in a fixed manner and the second partial region is held on the rear wall of the module frame, with transversal play in relation to the direction of movement of the switching device.

Device for earthing a switching device arranged in a module frame in a displaceable manner

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Friedrichsthal, Germany

Johannes-Gerhard Banghard