High-voltage switch and fracture structure

Abstract

The invention relates to a high-voltage switch and a fracture structure. The high-voltage switch comprises a support cylinder, and a horizontal cylinder body is arranged at the upper end of the supporting cylinder; a transmission rod is arranged in the supporting cylinder; a pull rod connected with a moving contact of an arc extinguishing chamber is arranged in the horizontal cylinder body; the transmission rod is connected with the pull rod through a crank arm; a resistor moving contact and a resistor static contact are arranged on the horizontal cylinder body; a swing arm is hinged to the horizontal cylinder body, the swing arm is connected with the crank arm through a connecting rod and drives the resistor moving contact to move in the same direction as the arc extinguishing chamber moving contact when the crank arm rotates; and the resistor moving contact and the resistor static contact are switched on before the arc extinguishing chamber moving contact and the arc extinguishing chamber static contact are switched on when the swing arm swings. Before the moving contact and the static contact of the arc extinguishing chamber are switched on, the resistor moving contact and the resistor static contact are switched on firstly, the closing resistor is connected into an electric power system earlier than a main loop, large current generated by closing directly acts on the closing resistor and is dissipated in the form of heat, and then, the main loop is closed, so that the moving contact and the static contact of the arc extinguishing chamber are protected.

Description

technical field [0001] The invention relates to a high-voltage switch and a fracture structure. Background technique [0002] In the field of high-voltage switches, circuit breakers are often used. When the circuit breaker is working, the opening and closing of the circuit breaker is mainly realized by opening and closing the dynamic and static contacts of the arc extinguishing chamber. For example, an authorized announcement number is CN205194604U, and a Chinese patent titled a circuit breaker and its connection box discloses a circuit breaker. The circuit breaker includes vertically arranged pillars. The two sides of the box are respectively connected with a fracture of the arc extinguishing chamber. The dynamic and static contacts of the arc extinguishing chamber are arranged in the fracture of the arc extinguishing chamber. The transmission mechanism is installed in the connection box. The upper hinge is connected with an insulating pull rod connected to the operating m...

AI Technical Summary

Problems solved by technology

During the actual use of the circuit breaker, when the main circuit is cut off or turned on by the separation and closing of the moving and static contacts, a transient overvoltage will be generated, which will damage the structure of the moving contact and affect the power system. stability

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