接触网系统的任务是使电力机车在各种气候条件下均能得到所需要的电能。它和轨道一样,接触网也有安装、检查、保养、大修和更新等问题。随着运输能力提高、运量增加、牵引力加大,接触网的负载加重,保养和整修任务也就更加繁重。但是,由于运输日益繁忙, The task of the catenary system is to make electric locomotives get the required electrical energy under all kinds of climatic conditions. Like tracks, catenaries also have issues of installation, inspection, maintenance, overhaul and renewal. As transport capacity increases, volume increases, traction increases, catenary loads become heavier, and maintenance and refurbishment tasks are more onerous. However, due to the increasingly busy transport,