Sediver Societe Europeenne D'isolateurs En Verre Et Composite

Sediver, Societe Europene D/isolateurs En Verre Et Composite

Rene Joulie

Serge Tartier

Rene Parraud

Emmanuel Brocard

Gilles Bourdier

The lightning arrester assembly for an overhead line for transporting electricity comprises a lightning arrester connected in series with a horned spark-gap between the electricity transport line and a support structure in the form of an arm of a pylon connected to ground. The assembly also includes a device for flagging a malfunction of the lightning arrester, which device is connected in series with the lightning arrester on one of the horns of the spark-gap.

Lightning arrester assembly for an overhead electricity line with a

The lightning arrestor has two metal end fittings for connection purposes, a stack of electrically conductive components extending along a longitudinal axis between the two end fittings, and an envelope surrounding the electrical components and the end fittings in such a manner as to maintain electrical contact between the components. The envelope is made of a thermoplastic material that molded over the electrical components and the end fittings. It has an embossed outside surface including depressions and projections. The depressions correspond to zones of reduced envelope wall thickness and they serve to constitute lateral openings through the envelope for allowing gas to escape to the atmosphere.

Lightning arrestor with a thermoplastic envelope having an embossed

The electrical insulator includes a laminated tube serving as a support for a covering of elastomer material constituting a plurality of annular fins which project from the tube. Two circular grooves and a helical groove are formed in the outside wall of the tube for receiving the optical waveguide. The circular grooves are parts of bearing surfaces which are formed at the ends of the tube and to which end fittings of the insulator are secured. The optical waveguide is embedded in the elastomer material and at the bottoms of the grooves.

Electrical insulator equipped with optical fibers, and manfacturing

A device for detecting and indicating a fault current flowing through a lightning arrestor or an insulator, the current being DC or at AC mains frequency, the device being housed inside a box that is provided with a frangible window and that has a piece of metal electrically connected to an end fitting of the lightning arrestor or of the insulator passing therethrough. The device has: a transformer for transforming the current, the primary of the transformer being constituted by the piece of metal, and the secondary of the transformer being connected to a peak-limiting circuit to make pulses of current due to surges corresponding, in particular, to lightning strikes inoperative; a heating resistance fed by said transformer and constituting an igniter for a pyrotechnic composition in which it is embedded, the composition being designed to break the frangible window; and preferably indicator means suitable for being released by rupture of the frangible window.

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Bellerive sur Allier, France

Rene Joulie