Railway Traction Transformer High Voltage Switchgear

Abstract

The invention relates to the field of high voltage electrical equipment, in particular to rail traction high voltage switchgear. The rail traction high voltage switchgear comprises a main incoming circuit breaker, a standby incoming circuit breaker, a main earthing switch, a standby earthing switch, a main bus circuit breaker, a standby bus circuit breaker, an incoming sleeve, a bus sleeve, an incoming circuit breaker operating mechanism, an earthing switch operating mechanism and a bus circuit breaker operating mechanism. The circuit breaker is composed of a vacuum arc-extinguishing chamber,a copper conductive part and a solid insulating material. A semi-conductive buffer layer is arranged between the conductive part and the enclosed part of the solid insulating material. A semi-conductive electrical shielding layer is cured at the non-connected part of the surface of the solid insulating material, and the non-connected part of the surface of the solid insulating material is connected with the shell. A uniform piece is arranged at the joint of the conductive piece to eliminate a partial point discharge phenomenon. According to the rail traction high voltage switchgear provided bythe invention, the volume of the switch is reduced, the partial discharge magnitude of the product is improved, and the reliability is improved.

Description

technical field

[0001] The invention relates to the field of high-voltage electrical equipment, in particular to a high-voltage switch for a railway traction transformer. 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); w...

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