Abb Research Ltd.

Abb Schweiz Ag

Abb Power Grids Switzerland Ag

Guido Meier

Jean-Claude Mauroux

Leopold Ritzer

Jens Rocks

Olaf Hunger

Uwe Kaltenborn

Markus Keller

Rudi Velthuis

Marc Mollenkopf

Stéphane Schaal

Stéphane Page

Sanel Pidro

Stefan Förster

It is proposed a liner arrangement for fitting a tubular insulator body in a circuit breaker. The liner arrangement includes a planar, electric-arc resistant and heat resistant liner layer comprising a first edge portion and a second edge portion that is located opposite the first edge portion, wherein the first edge portion has a first contour extending in a direction transversally to a plane defined by the planar liner layer. The second edge portion has a second contour having a geometry that is complementary to the first contour such that the first edge portion can be attached by way of a form fit to the second edge portion once the planar liner layer is bent to a tubular shape. Further, a circuit breaker including a liner arrangement and an insulator is described. A method for protecting an insulator body of a heat chamber insulator for a circuit breaker is also described.

Liner arrangement and a circuit breaker with a liner arrangement and method for protecting an insulator body

Mold-free resin-insulated coil windings are obtained by applying continuous fibers embedded in a quasi-solid-state epoxy-resin matrix, e.g. in the form of a tape, to the coil windings. The tape is locally heated up to the melting point of its polymer matrix, and is subsequently pressed against the winding body. The heated and fused resin of the tape, which is pressed onto the coil, flows under pressure into the voids and gaps between the coil windings and fills them up, thereby hermetically insulating the coil windings. After leaving the heating and pressing apparatus the fused epoxy resin becomes solid again. The resulting curing process is thus considerably simplified and shortened, compared to the state of the art.

Mold-free resin-insulated coil windings

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

Solid insulator for gas-insulated encapsulated high voltage installations with an insulator body, which is supporting at least one central conductor that is provided for carrying high voltage and that is arranged in an outer enclosure. The insulator body comprises a fiber-reinforced polymer.

Solid insulator and method for manufacturing a solid insulator

Growing community of inventors

Würenlingen, Switzerland

Guido Meier