Patent ID: 6645637
Filing Date: 2003-11-11
Classification: H01H,Y10T

Abstract:
A method of quenching electrical arcs in an electrical apparatus comprising fuse elements by applying to said fine element an electric arc extinguishing medium in pasty to solid form, consisting of a silicone polymer or a mixture of silicone polymers and at least one mineral filler, wherein(i) said silicone polymer or the mixture of the silicone polymers optionally is a curable polysiloxane or a curable polysiloxane mixture, and (ii) at least one of said at least one mineral filler has an average grain size in the range of from 500 nm to 500 &mgr;m and is selected from the group consisting of natural purified sands; silicon oxide; aluminum oxide; titanium oxide; silicates; mineral carbonates; geopolymers; glasses, mica, ceramic particles; boric acid, metal hydroxides; mineral substances that contain water of hydration; MgCO3; Mg(OH)2; and MgO.