Burn-off contact arrangement

Details Burn-off contact arrangement Burn-off contact arrangement

2000-05-11

2001-07-10

Donovan, Lincoln (Department: 2836)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Vacuum

C218S048000, C218S123000

Reexamination Certificate

active

06259050

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a burn-up switching arrangement, in particular for circuit breakers, such as are used in power stations, transformer stations and other facilities for the supply of electrical energy for switching on and off operating currents and overcurrents.
2. Description of the Related Art
Generic burn-up switching arrangements are known (see, for example, DE-A-196 13 568), in which the contact fingers of a contact bell are anchored fixedly, so that the pressure force in the switch-on position is generated merely by the generally low elasticity of the contact fingers. In arrangements of this type, the burn-up reserve is restricted to the initial elastic deflection of the contact fingers.
SUMMARY OF THE INVENTION
By contrast, the object on which the invention is based is to specify a burn-up switching arrangement which has a burn-up reserve not restricted by the material properties of the contact fingers.
This object is achieved by means of a burn-up switching arrangement, in which the contact fingers have a large radial clearance available, so that even a considerable burn-up can be compensated by a suitable variation in the position of the contact fingers.


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“Kupfer-Beryllium ein Federwerkstoff für Steckerkontakte”, Von Günter F. Beck,Industrie-Elektronik Elektronik, pp. 695-699. (No date).
“Richtlinien für die Beurteilung von Schalstücken in Expansionsschaltern”,Siemens-Schuckertwerke Aktiengesellschaft, pp. 3-12 (No date).

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