Abb Research Ltd.

Abb Technology Ag

Leopold Ritzer

Jean-Claude Mauroux

Martin Lakner

Guido Meier

Marc Mollenkopf

Felix Greuter

Lutz Niemeyer

Lukas Zehnder

Kurt Kaltenegger

Olaf Hunger

Thomas Schoenemann

Nikolaus Zant

Max Claessens

Andrej Krivda

Markus Keller

Elias Julke

Bandeep Singh

Daniel Chartouni

Jochen Kiefer

Vincent Tilliette

Bodo Bruhl

Klaus-Dieter Weltmann

Bruno Widmer

Reto Weder

Stephen Clifford

Peter Unternaehrer

Sanel Pidro

Faustine Soyeux

Ekkehard Schade

Lennart Wihlsson

Lars Schmidt

Polymer concrete electrical insulation including a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler compositions. The polymer concrete electrical insulation system optionally may contain additives. The epoxy resin composition is based on a cycloaliphatic epoxy resin. The inorganic filler composition can be present within the range of about 76% by weight to about 86% by weight, calculated to the total weight of the polymer concrete electrical insulation system. The inorganic filler composition includes a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (&#x3bc;m) to 100 micron (&#x3bc;m) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)]. The inorganic filler with an average grain size within the range of 1 micron (&#x3bc;m) to 100 micron (&#x3bc;m) [component c(i)] can be present in an amount within the range of 22% to 42%, calculated to the total weight of the polymer concrete electrical insulation system; and (e) the inorganic filler with an average grain size within the range of 0.1 mm to 2 mm [component c(ii)] is present within the range of 41% to 61% by weight, calculated to the total weight of the polymer concrete electrical insulation; and method of producing said electrical insulation.

Polymer concrete electrical insulation

A high-voltage insulator includes a metal armature, an insulating tube joined to the metal armature, which is adhesively bonded to the metal armature at an end formed as a supporting ring, and an axially symmetrical adhesive-bonding joint disposed around the axis of the insulating tube. An annular grove, which is formed in the metal armature, is disposed around the axis of the insulating tube and receives an end portion of the supporting ring. Sealing surfaces are respectively formed in the groove and in the supporting ring. The sealing surfaces are arranged and formed in such a way that, when the insulating tube and the metal armature are joined, they slide on one another, thereby forming a seal, and the supporting ring acting as a displacement body presses adhesive that has been introduced into the groove before the joining into the adhesive-bonding joint.

High-voltage insulator

An exemplary isolating tube, and production method thereof, includes a mechanically load-bearing plastic tube composed of a fiber-reinforced polymer for use in a cooling element which can be loaded with high voltage, during whose operation the isolating tube forms an electrical isolation gap and in the tube interior carries an agent which flows as a liquid and/or vapor. The isolating tube can have a diffusion barrier which is held coaxially by the plastic tube. Such an isolating tube can be produced using an exemplary novel method for production.

Isolating tube for a cooling element which can be loaded with high voltage

The shaft includes two electrically conducting connecting pieces (), which can be connected to different electric potentials, and also an insulating tube (), which can be subjected to torsional loading. The two connecting pieces () are respectively fastened to one of the two ends of the insulating tube (). In order that the shaft can also transmit great torques, the following means are provided for fastening at least one of the two connecting pieces (): An adhesive joint (), which is formed by a cone () formed into one end of the insulating tube () and made to run from the circumferential surface () to the inner surface () of the insulating tube () and also by a mating cone () formed into the at least one connecting piece (), and by a gap () formed by the cone () and mating cone () and filled with adhesive. Alternatively, the fastening means may also include an embedding, which has a portion of the at least one connecting piece, made to extend in the direction of the axis of the insulating tube, as the part to be embedded, and the end portion of the insulating tube produced by a casting process, as the embedding body.

Shaft, method for producing it and device for carrying out the method

An insulating part () is provided for a high voltage switch of a metal-enclosed circuit-breaker system and is executed as a pressure-gelated casting on the base of a polymeric composite material. It comprises a base-plate () with a centrally arranged large through-hole () for receiving a current terminal lead of the high voltage switch and with small through-holes () for receiving fastening screws. The insulating part further comprises two bearing blocks () for receiving a shaft of a movable contact of a contact arrangement of the switch and at least a first collar () which surrounds the large through-hole (). For reason of the execution as a pressure-gelated casting the insulating part () can be manufactured easily with low costs but with high precision. In general a finish-maching of the casting is not required. The integration of the large through-hole () and of the small through-holes () as well as of the two bearing blocks () and the first collar () into the insulating part () during pressure gelation of the polymeric composite material result in a complex design which fulfills all required mechanical, electrical and thermal functions during operation of the system.

Insulating part for a high voltage switch of a metal enclosed circuit breaker system

This hybrid circuit breaker has at least two series-connected arcing chambers which are operated by a common drive or by separate drives and are filled with different arc extinguishing media. Means are provided which ensure a sensible voltage distribution between the first and the second arcing chamber in the course of a switching process. At least one vacuum switching chamber having an insulating housing, is provided as the second arcing chamber. The aim is to provide a hybrid circuit breaker wich can be produced economically and which has high availability. This is achieved, inter alia, in that means are provided which ensure that the movement of the contacting arrangement of the first arcing chamber precedes the movement of the contact arrangement of the second arcing chamber during a disconnection process, and that the movement of the contacting arrangement of the second arcing chamber precedes the movement of the contact arrangement of the first arcing chamber during a connection process. The second arcing chamber is permanently bridged by a non-reactive resistor, which is in the form of a resistance coating applied to the inner wall or the outer wall of the insulating housing of the second arcing chamber.

Hybrid circuit breaker

The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material which, on exposure to an arc, forms arc-extinguishing gas. For the purpose of improving the making and breaking capacity, such a stock can advantageously be employed in a gas-blast circuit breaker in which arc-extinguishing gas is blown onto the switching arc. This involves the stock preferably being positioned at such points guiding the arc-extinguishing gas, at which the stock is exposed to the radiation of the arc and the thermal action of arc gases.

Stock giving off arc-extinguishing gas, and gas-blast circuit breaker

The post insulator (6) has an insulator body (8), of cured cast resin, which can be subjected to a pressure medium, and at least one potted fitting (11) penetrating the insulator body (8) and subjected to high voltage. The metallic support body (12) has a lateral surface (15). The intention is to obtain a post insulator which is of simple structure and which is designed for comparatively high mechanical loading. This is achieved by providing the lateral surface (15) of the support body (12) with a bonding layer (13) which adheres better to the lateral surface (15) than the cured cast resin. The cured cast resin is cross-linked with the bonding layer (13).

Post insulator

Growing community of inventors

Untersiggenthal, Switzerland

Leopold Ritzer