Extinguishing medium for quenching electric arcs scope
AssigneeABB Research Ltd.
InventorsUwe Kaltenborn, Jens Rocks, Pal Kristian Skryten
Life of this patent
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Abstract
Extinguishing medium in pasty to solid form for quenching electric arcs, consisting of a silicone polymer or a mixture of such silicone polymers, with the silicone polymer or the mixture of silicone polymers containing a mineral compound or a mixture of such compounds in powder form as a filler; use of the extinguishing medium to quench electric arcs in overcurrent-protection elements, in electronics and microelectronics; in high-voltage engineering; or in repeating fuses, and electrical devices, machines and systems which contain an extinguishing medium according to the invention.
Claims24
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 μm 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.
An electrical apparatus comprising;
- at least one fuse element;
- and
- an electric arc extinguishing medium applied to the at least one fuse element;
- wherein
- the electric arc extinguishing medium is in pasty to solid form and consists of a silicone polymer or a mixture of silicone polymers and at least one mineral filler,
- (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 μm 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.
Dependencies are inferred from the claim text.