Circuit breaker pole for railway traction lines

Abstract

The invention relates to the field of high-voltage electrical equipment, in particular to a circuit breaker pole for railway traction lines. The circuit breaker pole includes a static end copper conductive part, a vacuum arc extinguishing chamber, a moving end copper conductive part, a tie rod chamber, a semi-conductive buffer layer and a semi-conductive shielding layer. The semi-conductive bufferlayer is arranged between a conductive body and the sealed part of a solid insulating material. The semi-conductive shielding layer is solidified at the non-connection part on the surface of a solidinsulating material, and the semi-conductive shielding layer is connected with a shell. A bottom flange of the circuit breaker pole is provided with a corrugated sleeve groove. Voltage equalizing parts are arranged at the joints of the conductive body to eliminate the phenomenon of partial point discharge. The size of switches is reduced. The partial discharge quantity of products is reduced, theservice life of products is prolonged, and the reliability is improved.

Description

technical field [0001] The invention relates to the field of high-voltage electrical equipment, in particular to a pole of a railway traction circuit breaker. Background technique [0002] With the continuous development of China's economy, railway transportation is playing an increasingly active role in the important means of transportation in China. China's railway construction will enter a golden period, and high-speed rail and bullet trains have become the main means of transportation for travel. The safety and reliability of traction substations that provide power for electrified locomotives are also becoming more and more important. With the advent of the high-speed rail era, they are facing increasingly strong market demand. Railway traction power supply lines implement segmental power supply. When locomotives pass by, the current of this section of the line is relatively large (for example, the current required by the Fuxing bullet train reaches 1000A); when the loco...

AI Technical Summary

Problems solved by technology

Existing gas insulated switches have large volume and low safety (there are risks of gas leakage, deflagration, etc.)

Solid insulated switchgear has the advantages of small size and no arcing, but it is difficult to control the temperature rise. It is necessary to solve the problem of thermal stress caused by alternating high and low temperatures to prevent insulation failure caused by cracking of the insulating layer.

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