Abstract:
Medium-voltage or high-voltage switchgear assembly according to the preamble of patent claim 1. In order in this case to achieve the situation whereby a housing can be very largely dispensed with, and, moreover, a better ability to prefabricate the switchgear assembly arises, it is proposed according to the invention that said components of the switchgear assembly are additionally provided with an electrically conductive surface coating in their entirety or only on their surfaces provided with insulation material, and these respective coatings of the respective components in a switchgear assembly are grounded to the same electrical ground potential.
Abstract:
Die Erfindung betrifft eine Vakuumschaltkammer mit einer isolierenden keramischen Wandung, innerhalb der im Vakuum bewegliche Kontaktstücke angeordnet und von einer Schirmung zwischen Kontaktstück und Schaltkammerwandung umgeben sind, gemäß Oberbegriff des Patentanspruches 1. Um hierbei zum einen die Abbrandfestigkeit der Schirmung und zum anderen die dielektrische Festigkeit der Anordnung zu verbessern, ist erfindungsgemäß vorgeschlagen, dass im Bereich des Schirmes (4, 7) oder anderer Bauteile innerhalb der Vakuumschaltkammer (10) zumindest teilweise Beschichtungen aus hochschmelzendem Material oder aus Refraktärmetallen aufgebracht sind.
Abstract:
The subject of the invention is a high-voltage thick-film high rupturing capacity substrate fuse. The characteristic feature of the inventive fuse is that inside a tubular insulating casing /1/, which is closed at both ends with metal endocarps /2/ and filled with arc quenching medium /3/, there is located at least one insulating substrate /4/, along which there is placed at least one fuse element /5/ in the form of a thin conducting film and which has terminal areas /6/ at its ends, which areas are electrically connected with the end-caps by specially shaped contacts /7/ located inside the end-caps. The fuse element comprises a basic part formed by multiple identical V-shaped modules and two end modules forming electric connections between the basic part and the terminal areas. In each module, the arms of the V shape, of a specific width, end with arches directed outwards /8/, which arches are connected with the arches of the arms of the neighboring modules by means of line segments, thus forming a line, which bends many times at a constant angle and has truncated vertices in each module, in which line at least one module contains at least one edge constriction /9/, enabling opening of the current path when the fuse is overloaded.
Abstract:
The invention relates to a vacuum interrupter chamber having an insulating ceramic wall, within which contact pieces which move in a vacuum are arranged and are surrounded by a screen between the contact piece and the interrupter chamber wall, according to the preamble of patent claim 1. In order in this case to improve on the one hand the erosion resistance of the screen and on the other hand the dielectric strength of the arrangement, the invention proposes that coatings composed of high-melting-point material or composed of refractory metals be fitted at least partially in the area of the screen (4, 7) or other components within the vacuum interrupter chamber (10).