Device for automatically disconnecting an electric capacitor in the case of a short circuit

Abstract

Abstract A device for automatically disconnecting an electric capacitor in the case of a short circuit comprises a container for housing the capacitor therein, a cover for hermetically dosing the container, terminals extending through the cover and rigidly connected thereto, and supply conductors extending between the terminals and the capacitor within the housing. In known devices of the described type, the container is formed of metal and includes a deformable peripheral wall portion permitting the top and bottom portions of the container to be moved away from one another by an overpressure within the housing caused by the decomposition of a synthetic dielectric in the case of a short circuit. The formation of a deformable peripheral wall portion in a container made of a plastics material offers considerable difficulties. The invention therfore provides that the cover (4) includes a central portion (5) carrying the terminals (8), a peripheral portion (6) affixed to the container (1), and a deformable intermediate portion (7) adapted to permit the central portion to move away from the container in an axial direction in the case of an overpressure developing within the container. This configuration permits the container and the cover to be made of a plastics material or any other suitable material.

Inventors

• 👤 Paolo Matteuzzi
• 👤 Carlo Avioni
• 👤 Claudio Benfenati
• 👤 Giorgio Lamma

Bibliographic Details