High-voltage safety interlock circuit in electric locomotive crew and protective method

Abstract

The invention discloses a high-voltage safety interlock circuit in an electric locomotive crew. The high-voltage safety interlock circuit comprises a train control system, a main broken ring of each locomotive section and a high-voltage safety interlock auxiliary contact of each locomotive section; the main broken rings of the locomotive sections are all in linkage with the high-voltage safety interlock auxiliary contacts of the locomotive sections, and when the high-voltage safety interlock auxiliary contact of at least one locomotive section is disconnected, the main broken rings of the locomotive sections are all disconnected before a train control system controls a pantograph is lowered. The high-voltage safety interlock auxiliary contacts of the locomotive sections are in linkage withthe main broken rings of the locomotive sections, after any one high-voltage safety interlock auxiliary contact is disconnected, all the locomotive main broken rings are disconnected before the pantograph is lowered, and therefore the phenomenon that the pantograph is subjected to arc pulling and damage is effectively avoided, the service life of the pantograph is prolonged, and workloads of maintenance operation are reduced. The invention further discloses a high-voltage safety interlock protection method in the electric locomotive crew. The method has the advantages.

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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