Permanent magnet vacuum circuit breaker and air inflation cabinet

Abstract

The invention provides a permanent magnet vacuum circuit breaker and an air inflation cabinet. The permanent magnet vacuum circuit breaker comprises a drive rod, an insulating pull rod, a connecting rod assembly, a flexible connecting piece, a vacuum arc-extinguishing chamber and a wire incoming terminal which are arranged in sequence along the straight line, wherein the insulating pull rod is connected with the drive rod; the connecting rod assembly is connected with the insulating pull rod; a contact spring is arranged on the connecting rod assembly in a sleeving mode; a positioning hole isformed in the flexible connecting piece in a penetrating mode; the connecting rod assembly passes through the positioning hole; the contact spring abuts between the flexible connecting piece and the connecting rod assembly; the vacuum arc-extinguishing chamber is internally provided with a movable contact and a static contact; the movable contact is connected with the connecting rod assembly; themovable contact can move relative to the static contact; the movable contact and the static contact can be connected separately; and the wire outgoing terminal is electrically connected with the static contact. Through the devices arranged in sequence along the straight line, the realized miniaturized permanent magnet circuit breaker can provide quicker break time and breaking capacity for the airinflation cabinet.

Description

technical field [0001] The invention relates to the field of high-voltage electrical equipment, in particular to a permanent magnet vacuum circuit breaker and an inflatable cabinet. Background technique [0002] The inflatable cabinet products are widely used in the construction and transformation of urban power grids, suitable for ring network power supply and terminal power supply in distribution power systems, and also suitable for loading into prefabricated substations and distribution stations. They are fully enclosed, maintenance-free, compact in structure, and reliable. High reliability, the equipment adopts modular design, which is compact and can be combined and expanded freely, and can be configured with combined electrical unit and circuit breaker unit, which plays an important role in the development of my country's electric power industry. [0003] In the past line construction and transformation process, when the line capacity was small, the circuit breakers in ...

AI Technical Summary

Problems solved by technology

When the circuit breaker is working, the spring is under load for a long time, and the spring stiffness will be attenuated after a long time, which will affect the closing and opening output of the circuit breaker, resulting in the closing time and opening time of the circuit breaker. , Closing speed, opening speed, closing bounce, opening bounce and other parameters are too discrete or fail to meet the requirements of the circuit breaker

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