COMMUTATEUR ELECTRIQUE ISOLANT A TROIS COLONNES

Commutateur électrique isolant, comprenant des première et troisième colonnes isolantes fixes latérales, et une deuxième colonne isolante centrale. La colonne centrale (5) peut tourner axialement, à une extrémité de celle-ci étant associés transversalement deux premiers contacts mobiles axialement, qui peuvent se coupler avec et se découpler de seconds contacts (32) rigidement associés auxdites première (3) et troisième (4) colonnes, auxdits premiers contacts (23, 24) et auxdits seconds contacts (32) étant associées des moyens (31, 34) de protection permanente contre la pollution et la formation de glace. The present invention relates to an insulating electrical switch comprising first and third lateral fixed insulating columns, and a second central insulating column. According to the invention, the said central column 5 can rotate axially, one end of the latter being associated transversely with two first axially movable contacts, which can couple with and uncouple from second contacts 32 rigidly associated with the said first 3 and third 4 columns, the said first contacts 23, 24 and the said second contacts 32 being associated with means 31, 34 of permanent protection from pollution from the environment and ice formation, the said insulating switch 1 being provided with means for maintaining electrical continuity between the said first contacts. The invention applies to three-column insulating electrical switches.