Arc extinguishing cover material:

The arc extinguishing cover is subject to the high temperature of the arc, so there are certain requirements for the material of the arc extinguishing cover. With the development of electrical technology, especially the development of high-voltage electrical appliances, traditional arc extinguishing materials cannot keep up with the needs of the times. The material of the arc extinguishing cover must not be deformed due to heat and insulation performance under the high temperature of the arc, and the material has good mechanical strength and easy processing.

Asbestos hood materials used to widely use asbestos cement and clay materials. First gradually changed to arc-resistant BMC molding compound. Its main raw materials are chopped glass fibers, unsaturated resins, fillers, and agglomerated prepregs made of various additives. Because the BMC material has excellent electrical properties, mechanical properties, heat resistance, chemical resistance, and adapts to various molding processes, it is easy to manufacture and meet the performance requirements of arc extinguishing material in terms of arc resistance and mechanical strength. BMC molding compounds are ideal for use in arc extinguishing hoods.

Structure of Arc extinguishing:

Drop-out fuse with arc extinguishing cover: including arc extinguishing box, arc extinguishing knife and arc extinguishing cover, arc extinguishing cover protective sleeve matching the inner cavity of the roommate insulation material outside the arc extinguishing cover, and arc extinguishing The outer wall of the cover is connected to the inner wall of the arc extinguishing cover protective sleeve by gluing.

Position of the arc extinguishing cover on the fuse: