Bbc Brown, Boveri & Company, Limited

Renata Sebalj

Gernot H Gessinger

Keith N Melton

Wolfgang Widl

The arc withstanding electrodes in an electric circuit breaker for switching high voltages attain greater mechanical strength and improved arc withstanding capabilities by forming the arc withstanding electrodes of a carbon-fiber-reinforced-graphite material which material is constituted of a graphite matrix which is reinforced by carbon fibers embedded therein. A method for forming the carbon-fiber-reinforced-graphite of the arc electrodes and for affixing the arc electrodes to a metal carrier therefor includes the steps of employing a high-temperature solder based on copper and/or silver, containing at least one carbide-forming element such as, for example, Cr.

Arcing contact tip and method for producing such an arcing contact tip

A contact arrangement for a graphite electric arc-electrode employs a contact spud composed of a metal having a high melting point and a soldering layer disposed between the contact spud and graphite electrode. The soldering layer contains at least one carbide forming metal. In one embodiment of the invention, a carbide-forming metal layer is disposed between the graphite electric arc-electrode and the soldering layer. In a preferred form of the method of making the arrangement, the soldering layer and the carbide-forming metal layer are plasma-sprayed or steamed onto the surface to be connected.

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Neuenhof, Switzerland

Renata Sebalj