Anti-thunder drop-out fuse

Abstract

The invention discloses an anti-thunder drop-out fuse which comprises an insulating support column, a connecting piece used for connection is arranged on the lower portion of the insulating support column in a sleeved mode, one end of the insulating support column is rotationally connected with a lower contact plate, the lower contact plate is provided with a lower contact piece and a tooth-shaped support playing a guiding role, and the other end of the insulating support column is provided with an upper contact plate. The upper contact plate is provided with a wiring terminal, the wiring terminal is connected with a cylindrical dissolving tube through a suspension piece, the end part of the cylindrical dissolving tube is provided with a lower movable contact, the cylindrical dissolving tube is connected with a reinforcing spring through a sleeving ring, and the other end of the reinforcing spring is connected with an insulating support column through a ceramic connecting ring. The cylindrical dissolving tube is pulled to enable the reinforcing spring arranged on the cylindrical dissolving tube to be stretched to generate tensile force, rapid butt joint is achieved through the elastic force of the spring, the elastic force is far higher than the speed of manual butt joint of an electric power worker, therefore, the arc generation time is shortened, manual operation is not needed, and harm to personnel when a circuit is connected can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of power facilities, in particular to a lightning protection drop-out fuse. Background technique [0002] Drop-out fuse is the most commonly used short-circuit protection switch for branch lines of 10kV distribution lines and distribution transformers. It is economical, easy to operate, and adaptable to outdoor environments. It is widely used in 10kV distribution lines and power distribution The primary side of the transformer is used for protection and equipment switching and switching operations. It is installed under the branch line of the 10kV distribution line, which can reduce the scope of power outages. Because it has an obvious disconnection point, it has the function of an isolating switch, creating a safe working environment for the lines and equipment in the maintenance section, and increasing the number of maintenance personnel. sense of security. Installed under the distribution transformer, i...

AI Technical Summary

Problems solved by technology

[0003] Fuses are widely used in power distribution lines, but when the fuse is connected to electricity, it needs to be connected with power. The existing method is mainly to quickly connect the lower contact of the fuse with the contact piece manually, and the fast connection must be ensured. , High-voltage lines will cause high-voltage breakdown when they are connected. Improper operation will not only cause burnout of the fuse contacts, but also cause damage to electric personnel, and the existing fuses only rely on the lower movable contact when the fuse breaks. The elastic force of the metal sheet realizes quick disconnection. The elastic force of the metal sheet is affected by the external environment. In extreme cold conditions, it is very easy to cause the situation that it cannot be disconnected quickly, resulting in damage to electrical equipment. For this reason, a lightning protection drop type is proposed. fuse

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