Device for rapidly cutting off short-circuit current by airflow

Abstract

The invention discloses a device for rapidly cutting off short-circuit current through airflow, and belongs to the technical field of line breaking. The device comprises a sliding rod, a moving contact, a moving contact electrode, a static contact electrode and a static contact; the sliding rod is arranged at one end of the moving contact, the moving contact electrode is arranged at the other end of the moving contact, the static contact electrode is arranged on the static contact, and the static contact electrode is arranged on the moving contact; and the static contact electrode and the moving contact electrode are arranged oppositely. The device is characterized in that magnetic field electrodes are transversely arranged on the two sides between the moving contact electrode and the static contact electrode, a backflushing pipe is arranged on the side edge of the static contact, and the static contact electrode is connected with an electrode at the top end of the backflushing pipe. According to the device, short-circuit current cutting and arc extinguishing are integrated, arc extinguishing energy generated by lightning current can be utilized, short-circuit current which cannot be cut off by a circuit breaker is cut off, the device serves as standby protection of the circuit breaker, in the arc extinguishing process, arc reignition can be restrained, arc extinguishing is effective, and the device has the advantages of being simple in structure, small in occupied space, reliable and stable; therefore, the circuit breaker solves the problem that in the prior art, a circuit breaker cannot cut off short-circuit current, and serves as standby protection of a circuit.

Description

technical field [0001] The invention relates to the field of line breaking technology, in particular to a device for quickly cutting off short-circuit current by airflow. Background technique [0002] A short circuit is an abnormal grounding in a circuit. A long-term short circuit in the power grid will destroy the normal operation of the transmission line and endanger the safety of the equipment. We use circuit breakers to cut off short-circuit current and protect the safety of transmission lines and electrical equipment. [0003] In modern society, with the continuous advancement of science and technology, the continuous improvement of circuit breaker manufacturing technology, the continuous increase of grid capacity and the need for centralized power distribution, more and more circuit breakers are developing in the direction of miniaturization and high breaking. Miniaturization means developing a circuit breaker that can carry a larger current on the basis of the origi...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a device for quickly cutting off the short-circuit current by air flow, so as to solve the technical problem that the existing circuit breaker is difficult to cut off the direct lightning current

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