Abb Schweiz Ag

Abb Technology Ag

Robert Hauser

Walter Schmidt

The active part which is provided for use in a surge arrester includes two connecting fittings, which are arranged along an axis at a distance from one another, at least one cylindrical varistor column, which is provided between the two connecting fittings, and at least one dielectric loop. This loop is supported on the two connecting fittings and thus holds the active part together, thus forming a contact force. The active part is distinguished by a small physical height and little use of materials. This is achieved in that at least one of the two connecting fittings has an electrode, which is arranged at right angles to the axis and is in the form of a plate, as well as an electrical connection, which is integrally formed on the plate. Furthermore, supporting means which are in the form of shoulders are provided for the dielectric loop, and are formed in the plate and/or are integrally formed at the edge of the plate.

Active part for a surge arrester

The component with fault arc protection has an insulator in the form of a pillar, a first electrical conductor system which is provided on the insulator head and can be connected to high-voltage potential, and a second electrical conductor system which is provided on the insulator foot and can be connected to a ground potential. Each of the two electrical conductor systems contains an arcing electrode ( ) for dissipating any fault arc which occurs in the event of a discharge between the two electrical conductor systems. The fault arc is dissipated particularly effectively if at least one of the two arcing electrodes ( ) is in the form of a cup and has a cup base ( ), which is attached to one electrical connection of the first or of the second electrical conductor system, as well as a cup wall ( ) which is adjacent to the cup base ( ) and extends predominantly in the direction of the axis ( ) of the pillar. In this case, at least two material recesses are formed, which extend from the cup base ( ) to the cup rim ( ) and are predominantly in the circumferential direction in the cup wall ( ).

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Berikon, Switzerland

Robert Hauser