A kind of electric locomotive high-voltage circuit natural isolation and double main break redundant circuit system

Abstract

The invention discloses a natural isolation and double main-break redundant circuit system of a high-voltage circuit of an electric locomotive, comprising a first pantograph and a second pantograph respectively located at the front and rear ends of the electric locomotive, the first pantograph and the second pantograph. The pantograph is respectively connected to the incoming line ends of the first main circuit breaker and the second main circuit breaker, and the incoming line ends of the first main circuit breaker and the second main circuit breaker are also respectively connected to the first voltage transformer and the second main circuit breaker. For the voltage transformer, the outlet ends of the first main circuit breaker and the second main circuit breaker are connected in parallel to the transformer of the electric locomotive. The natural isolation of the high-voltage circuit of the electric locomotive and the redundant circuit system of double main break of the present invention is to install a "1+1" double main break structure circuit breaker on the electric locomotive, so that the front and rear pantographs of the locomotive can be connected to the two main breakers respectively. The circuit breaker is linked to realize the functions of natural isolation of the high-voltage circuit of electric locomotives and emergency treatment of faults, which can improve the reliability of the entire high-voltage system.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electrical appliances for electric locomotives, and in particular relates to a high-voltage circuit natural isolation and dual main break redundant circuit system for electric locomotives. Background technique [0002] Vacuum circuit breakers are widely used in Shaoshan electric locomotives, Hexie electric locomotives and EMUs. Its main function is reflected in the fact that the main circuit breaker is the main switch for carrying, closing and breaking the load current and short-circuit current of the locomotive. It is one of the most important electrical appliances in the main circuit of the locomotive. Once the main circuit breaker fails, it will directly affect the normal operation of the locomotive. run, resulting in a locomotive accident. Contents of the invention [0003] The purpose of the present invention is to provide a natural isolation and double main break redundant circuit sy...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a natural isolation and dual main break redundant circuit system for the high voltage circuit of an electric locomotive, which solves the problem that the existing vacuum circuit breaker is prone to cause locomotive accidents after failure

Images