Linear vacuum on-load dual-position switch

Abstract

The invention provides a linear vacuum on-load dual-gear selector switch. A sliding block is in sliding connection with the top of a base. A limit limiting mechanism is arranged on the sliding block. The sliding block is connected with a permanent magnet mechanism. One side of the sliding block is provided with a roller, and the other side of the sliding block is provided with a movable contact mounting base. One side of the base, relative to the roller, is provided with a vacuum tube buffer, a main vacuum tube, an auxiliary vacuum tube and a transition resistor. The other side of the base, relative to the movable contact mounting base, is provided with a static contact set of the selector switch. The static contact set comprises two static contacts, and a neutral position gear is arranged between the two static contacts. By the selector switch, the gear switching function and the vacuum arc extinguishing function of the selector switch can be completed at the same time. Meanwhile, during the switching process, the circuit is continuously powered on. By adopting the linear switching mode, the installation volume of the selector switch can be reduced, and the switching speed of the selector switch is high. Meanwhile, the selector switch is high in reliability, and long in service life.

Description

technical field [0001] The invention relates to an on-load changeover switch, in particular to a vacuum on-load double-position changeover switch with a linear structure. Background technique [0002] There are many uses for a toggle switch, from the simplest light switch to complex high-speed switches, time-delay switches, etc., are different types of toggle switches, which allow circuits to quickly switch between two or three states, including closed and open two ways. [0003] The on-load tap changer used in the power supply department is also a kind of switch. Because the power supply department needs to keep the circuit working continuously when switching circuits and adjusting voltage and load, the traditional switch is not competent. [0004] In addition, at the moment when the circuit is closed and switched, due to the potential difference between the moving contact and the static contact, when they are close to each other, a tip discharge phenomenon will occur, and...

AI Technical Summary

Problems solved by technology

[0003] The on-load tap-changer used in the power supply department is also a kind of switch. Because the power supply department needs to keep the circuit working continuously when switching circuits and adjusting voltage and load, the traditional switch is not competent.

[0004] In addition, at the moment when the circuit is closed and switched, due to the potential difference between the moving contact and the static contact, when they are close to each other, a tip discharge phenomenon will occur, and then air ionization will occur, and the arc will produce high-temperature oxidation on the surface of the contact. The conductivity of the contact decreases and the contact resistance increases. In the case of high current, once the contact resistance increases, the heating power P is proportional to the contact resistance, and the contact resistance generates serious heat, which further deteriorates the working state of the contact point.

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