Circuit breaker for distribution network automation

Abstract

The invention belongs to the technical field of circuit breakers, in particular to a circuit breaker for distribution network automation. The circuit breaker comprises a fixing plate, a vacuum shell,a driving motor, a limiting mechanism, a driving sleeve, a first conductor rod and a second conductor rod, according to the circuit breaker, relative swing of the first conductor rod and the second conductor rod is designed, so that after the first conductor rod and the second conductor rod which transmit current are disconnected, the distance between the second contact which transmits current andis installed on the first conductor rod and the first contact which is installed on the second conductor rod is increased; the electric field intensity between the first contact and the second contact is reduced, the resistance is increased, and the electric arc is easy to extinguish; moreover, the circuit breaker designed by the invention adopts double fractures which are connected in series, sothat the total length of the arc is lengthened, the resistance of the arc gap is increased, the lengthened speed of the arc is multiplied under the condition of the same contact travel and opening speed, the resistance of the arc gap is increased in an accelerated manner, the recovery speed of meson strength is increased, and the arc extinguishing time is shortened.

Description

[0001] Technical field [0002] The invention belongs to the technical field of circuit breakers, in particular to a circuit breaker for distribution network automation. Background technique [0003] A circuit interrupter is an electrical part that is used to open an electrical circuit, interrupting the flow of electricity. A basic example of a circuit interrupter is a switch. A switch basically consists of two electrical contacts that are in one of two states : Closed, meaning that the two contacts are in electrical contact with each other, allowing current to flow between the two contacts, or open, meaning that the two contacts are not in electrical contact with each other, preventing current flow. [0004] In high voltage applications, as the two contacts separate, an arc can form in the gap between the two contacts. An arc is a plasma discharge between two points caused by an electric current that ionizes a gas in the air between the two points. [0005] The generation o...

AI Technical Summary

Problems solved by technology

[0005] The generation of arcs during the transition of the two contacts can lead to unwanted effects that negatively affect the operation of the circuit interrupter and even potentially lead to a safety hazard

These negative effects will also have adverse consequences on the operation of the circuit breaker, melting and evaporating the contact surface, burning out the insulating material, and causing fire, explosion and other dangers to the oil-filled equipment; Moving under heat can easily cause flashover and short circuit and hurt people or cause the expansion of accidents

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