Surge arrester assembly

Details Surge arrester assembly Surge arrester assembly

1992-08-31

1994-05-31

De Boer, Todd

Electricity: electrical systems and devices

Safety and protection of systems and devices

High voltage dissipation

361126, 361132, H02H 906

Patent

active

053174739

ABSTRACT:
The invention relates to a surge arrester assembly with a plurality of parallel-connected arrester units (1) with polymer casing mounted in a rack. The lower and upper parts of the rack consist of bars (4a, 4b) of, for example, aluminium, which are included in the electric circuit. The bars are retained by, for example, support insulators (6) of porcelain or polymer material. The mechanical retention of the stacks of ZnO blocks of the arrester units (1) and the necessary contact pressure between the blocks are ensured by the rack structure. The electrical connections (23, 24) to the rack are arranged in such a way that, if a fault causing a short circuit in one of the block stacks occurs, the arc produced is blown by the current forces along the bars to the opposite end, where arcing horns (38) of a current-resistant material, for example steel, are arranged and where the arc may burn in a controlled manner without involving a risk to the environment. (FIG. 1 )

REFERENCES:
patent: 1497978 (1924-06-01), Jacobs
patent: 3601632 (1971-08-01), Frazier
patent: 4940961 (1990-07-01), Thuries et al.
patent: 5124872 (1992-06-01), Pham et al.

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