Electric energy meter external reclosing function circuit breaker

Abstract

The invention discloses an electric energy meter external reclosing function circuit breaker. The electric energy meter external reclosing function circuit breaker includes a circuit breaker body, a display screen and a control handle, wherein the circuit breaker body has a rectangular structure, the display screen is embedded on a front surface, the control handle is arranged at a lower part of the front surface of the circuit breaker body, and the circuit breaker body internally includes a breaking mechanism, an embracing buffer mechanism and a metal vapor replenishing mechanism. The electric energy meter external reclosing function circuit breaker is advantaged in that through the embracing buffer mechanism, when the circuit breaker is opened, contacts are held in an embracing airbag mode for buffering, a problem of burning damage to the circuit breaker because of reignition caused by severe vibration due to relatively large rebounding force is avoided, the circuit breaker is effectively protected, moreover, through the metal vapor replenishing mechanism in combination with opening arc-extinguishing zero-crossing, metal vapor is generated to supplement a distance pulled apart bythe contacts, and occurrence of overvoltage caused by interception is prevented.

Description

technical field [0001] The invention relates to the field of circuit breakers, more precisely, it relates to a circuit breaker with an external reclosing function for an electric energy meter. Background technique [0002] A circuit breaker is a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. However, the prior art electric energy meter external reclosing function circuit breaker still has the following defects: [0003] The opening speed of the circuit breaker with external reclosing function of the electric energy meter in the prior art is generally as fast as possible, but if the opening speed is too fast, the rebound force of the opening will be large, and the rebound will be too large to cause heavy vibra...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the object of the present invention is to provide a circuit breaker with external reclosing function for electric energy meters, to solve the problem that the opening speed of the circuit breaker with external reclosing function for electric energy meters in the prior art is generally as fast as possible, but If the opening speed is too fast, the rebound force of the opening will be large. If the rebound is too large and the vibration is too severe, it will easily cause re-ignition, causing the circuit breaker to burn out. If the distance is longer, the metal vapor produced by it is not enough to maintain the current, resulting in the phenomenon of overvoltage caused by interception.

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