Vacuum circuit-breaker and a method for controlling the same

Abstract

The aim of the invention is to improve the interrupting capacity of a vacuum switch, to achieve this, the contact parts (4, 5) that can be displaced in relation to each other are separated at a variable speed. Separation takes place in such a way that during a predetermined time period a predetermined distance between the contacts is not exceeded. To prevent said predetermined distance from being exceeded, a braking element is allocated to the vacuum circuit breaker.

Description

technical field

[0001] The invention relates to a control system for controlling a vacuum switch, the contact point system of which comprises at least two relatively movable contact parts, which are separated from each other at a variable speed during an opening process, and between which A light arc to be eliminated is burned during this disconnection process. Background technique

[0002] Such a control system is known, for example, from patent document DE 3815805 C2. The opening movement of a contact point arrangement of a vacuum switch is controlled by an eccentric drive. Here, the configuration of the mechanical actuation chain was chosen such that after a very short acceleration phase (1.3 ms) of a displaceable contact part, an open path of 1 mm of the contact part was achieved. Furthermore, it is stated that it proves to be particularly advantageous if the contact point separation speed reaches 2 m / s after 0.8 ms. This technical solution is based on the considerati...

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