High-voltage fuse with shielding function

Abstract

The invention relates to a high-voltage fuse with the shielding function. The high-voltage fuse comprises a porcelain tube, a fuse wire and two contacts. The fuse wire penetrates into the porcelain tube, the two ends of the fuse wire are connected and packaged on the contacts at the two ports of the porcelain tube, and shielding nets are arranged between the fuse wire and the porcelain tube. The shielding nets are arranged in the porcelain tube between the two contacts, the shielding nets are vacuumized, the fuse wire is shielded in the shielding nets, the diameter of the shielding nets is smaller than the diameter of the outer tube of the fuse and larger than the diameter of the metal wire, in a vacuum state, the influences of partial discharge of the fuse wire on partial discharge of other devices of the fuse in the use environment are reduced through the shielding nets, the electric field distribution of the high-voltage fuse can be effectively improved, the magnitude of partial discharge of the fuse is reduced, and therefore the partial discharge level of a high-voltage device matched with the fuse is increased and the overload and short-circuit protection on the high-voltage device is achieved.

Description

technical field [0001] The invention relates to a fuse, in particular to a high-voltage fuse with shielding function. Background technique [0002] At present, in order to protect the equipment between high-voltage equipment and high-voltage electrical appliances, high-voltage fuses are installed as protective equipment. The current high-voltage fuses use fuses directly in the fuse tubes, and the diameter of the fuses is relatively small. Under the action of high voltage, the field strength of the fuses is too concentrated and the partial discharge is large. Especially for the fuse built in the high-voltage equipment, due to the partial discharge phenomenon in the fuse body, the partial discharge of the entire high-voltage device is unqualified. Currently the most widely used fuse built into the voltage transformer, the inside of the fuse is filled with a large amount of arc-extinguishing insulating material, occupying insulation space, affecting the internal design...

AI Technical Summary

Problems solved by technology

The current high-voltage fuses use the fuse directly in the fuse tube, and the diameter of the fuse is relatively small. Under the action of high voltage, the fuse field strength is too concentrated and the partial discharge is large.

Especially for fuses built in high-voltage equipment, due to the partial discharge phenomenon in the fuse body, the partial discharge of the entire high-voltage device is unqualified

Currently the most widely used fuse built into the voltage transformer, the inside of the fuse is filled with a large amount of arc-extinguishing insulating material, which occupies the insulation space, affects the internal design of the product, wastes materials, and greatly increases the manufacturing cost and technical difficulty of the transformer.

Images