Vacuum circuit breaker with electromotive force compensation circuit

Abstract

The invention discloses a vacuum circuit breaker with an electromotive force compensation circuit, which belongs to the technical field of low voltage apparatuses. The vacuum circuit breaker comprises a shell, an operation mechanism, vacuum arc extinguish chambers, upper busbars and lower busbars, and is characterized in that: baffle plates are arranged on the upper part of the shell, and correspond to the vacuum arc extinguish chambers; the number of the baffle plates is equal to that of the vacuum arc extinguish chambers; the upper ends of the vacuum arc extinguish chambers are fixed with an upper conductive block respectively; a flexible connector is arranged above each upper conductive block; one end of the flexible connector is extended downwards, and is fixed with one side, facing the operation mechanism, of the upper conductive block so as to form a [-shaped conductive path by the flexible connector and the upper conductive block; the other end of the flexible connector is extended away from the operation mechanism, and is fixedly connected with the upper busbar; and the baffle plates are attached to the upper surfaces of the flexible connectors. The vacuum circuit breaker has the advantages of reducing the depth of the shell of the circuit breaker to meet the requirements of miniaturization on the volume of the circuit breaker, and ensuring the persistent stability of an electromotive force.

Description

Vacuum Circuit Breaker with Electrodynamic Compensation Circuit technical field The invention belongs to the technical field of low-voltage electrical appliances, and in particular relates to a vacuum circuit breaker with an electric power compensation circuit. Background technique As is well known in the industry, in low-voltage power distribution systems, circuit breakers have the functions of distributing power, protecting power circuits and electrical equipment, and avoiding hazards caused by overload, negative voltage, short circuit and / or ground fault. At present, it has gradually become a reality to reduce power loss and expand the power transmission radius by increasing the voltage of the power transmission and distribution system and the working voltage of the terminal appliances, so that the application of vacuum circuit breakers in this power transmission and distribution system has more advantages. This is because: first of all, because the low-voltage vacuum c...

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Problems solved by technology

Although the above two patent schemes achieve the effect of electrodynamic compensation in the same way but with the same results, since the electrical connection between the conductor, that is, the soft connection, and the dynamic conductive rod of the vacuum interrupter is reflected by the tightening (tightening) of the top vertical screw , and because the top vertical screw also serves as a mechanical connection for transmitting the mechanical power of the operating mechanism, after frequent operation of the circuit breaker, the mechanical connection part will become loose due to vertical (longitudinal) vibration, resulting in electrical connection Unreliable and prone to accidents

In addition, it can also be seen from the above two electrodynamic compensation schemes that since the U-shaped loops of the soft connection are arranged on one side of the vacuum interrupter and are far away from the vacuum interrupter, the depth of the circuit breaker is increased and the circuit breaker is restricted. The miniaturization of the device volume is not conducive to the direct action of the electric compensation force on the vacuum interrupter

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