Electrical surge arrester/diverter

Details Electrical surge arrester/diverter Electrical surge arrester/diverter

H - Electricity

01

C

26/112, 317/24

H01C 7/12 (2006.01)

Patent

CA 1315336

Abstract of the Dislcosure A distribution class surge arrester comprises a core formed of distributed zinc oxide varistor blocks, aluminium blocks acting as heat sinks and as spacers providing voltage grading and required arcing distances, and terminal blocks held in face to face contact by means of a glass reinforced epoxy shell which is formed by winding a pre-preg onto the assembled blocks and thermally curing under mould pressure within an evacuated mould. The core is housed within a polymeric shedded housing which is formed by shrinking a heat-shrink shedded sleeve onto the core with a sealant provided in the interface of the core and the sleeve, and end caps are sealed to the ends of the structure thus formed. The all solid-state arrester thus formed has performance and cost advantages over conventional porcelain housed arresters and furthermore has very considerable physical strength enabling it to serve additionally as a stand-off support insulator in situations where con- ventionally separate arrester and support insulators were required.

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