Fault gas seal for a polymer surge arrester

Details Fault gas seal for a polymer surge arrester Fault gas seal for a polymer surge arrester

H - Electricity

01

C

H01C 7/12 (2006.01) H01T 1/15 (2006.01)

Patent

CA 2079133

Fault gas seals to prevent the ejection of a surge arrester from a loadbreak bushing due to the generation of such gas in response to the failure of arrester devices in such surge arrester. A metal O-ring support is bonded to the conductive insert of the arrester housing or added as a retrofit to such housing. Annular grooves in the loadbreak probe are fitted with O-rings which are compressed against the support to provide a gas-tight passage along the probe surface. An additional annular groove can be used to receive a fastener to hold the retrofit in position.

Joints étanches au gaz de défaut servant à empêcher l'éjection d'un parafoudre hors du manchon de coupure par suite de la production de ce gaz en réponse à une défaillance des dispositifs contre les surtensions dans le parafoudre. Un support métallique de joint torique est collé à la pièce rapportée conductrice du boîtier du parafoudre ou installé après coup sur ce boîtier. Des rainures annulaires dans la sonde de coupure sont munies de joints toriques qui sont comprimés contre le support pour constituer un passage étanche aux gaz le long de la surface de la sonde. Une rainure annulaire additionnelle peut servir à recevoir une attache en vue de retenir en place l'installation faite après coup.

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