A high-voltage safety interlock circuit and protection method in an electric locomotive set

Abstract

This application discloses a high-voltage safety interlock circuit in an electric locomotive group, including a train control system, main break rings of each locomotive, and high-voltage safety interlock auxiliary contacts of each locomotive; the main break rings of each locomotive are Linked with the high-voltage safety interlock auxiliary contact of each locomotive, when the high-voltage safety interlock auxiliary contact of at least one locomotive is disconnected, the main breaking ring of each locomotive is before the train control system controls the pantograph lowering disconnect. In this application, the high-voltage safety interlock auxiliary contacts of each locomotive are respectively linked with the main break rings of each locomotive, so that after any high-voltage safety interlock auxiliary contact is disconnected, the main break rings of all locomotives are under The pantograph is disconnected before lowering the pantograph, thereby effectively avoiding the pantograph from being damaged by arcing, prolonging the service life of the pantograph and reducing the workload of maintenance operations. The application also discloses a high-voltage safety interlocking protection method in the electric locomotive group, which also has the above-mentioned beneficial effects.

Description

technical field [0001] The present application relates to the technical field of rail traffic control, in particular to a high-voltage safety interlock circuit and protection method in an electric locomotive set. Background technique [0002] High-voltage safety interlock is an important safety device in electric locomotives to protect the personal safety of drivers, passengers and maintenance personnel. When the operator is close to the high-voltage equipment, the grid-side circuit can be grounded through the high-voltage safety interlock to realize personal safety protection. In the prior art, for an electric locomotive set composed of multiple locomotives, the high-voltage safety interlock auxiliary contact of each locomotive is specifically connected in series to the main break ring of the locomotive. Wherein, the said main breaking ring is the control circuit of the main circuit breaker of the locomotive. Specific reference figure 1 and figure 2 , figure 1 It is a...

AI Technical Summary

Problems solved by technology

Therefore, although the existing technology can make the main break ring automatically disconnect due to the accidental disconnection of the high-voltage safety interlock auxiliary contact of the locomotive in this section, the situation that the pantograph lowers first and the main circuit breaker disconnects does not occur However, when the auxiliary contacts of the safety interlock of other locomotives are disconnected, the main break ring of this locomotive is also disconnected before the pantograph is lowered, so the pantograph will be severely pulled. Arc phenomenon, damage the service life of the pantograph

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