Abstract: This paper introduces the principle of ZPW-2000A frequency-shift modulated and impulse track circuit system and the technical advantages of this new track circuit system from three aspects: solving bad shunting, monitoring insulation damage and preventing insulation from scorching. By gaining practical experience from the track circuit design of the depot of Lanzhou West Station, this paper studies the differences between the new track circuit system and ZPW-2000A track circuit system, which can provide reference for relevant railway project designs.

Key words: ZPW-2000A, frequency-shift and impulse signal, track circuit, bad shunting, insulation damage, insulation burning

摘要： 介绍ZPW-2000A移频脉冲轨道电路的工作原理，从解决分路不良、绝缘破损检查、防止绝缘节烧损3方面体现该新型轨道电路的技术优势。结合兰州西站存车场轨道电路的工程设计经验，重点研究该新型轨道电路系统与ZPW-2000A轨道电路系统之间的差异，以期对相关铁路工程设计起到一定的借鉴作用。

关键词: ZPW-2000A, 移频脉冲, 轨道电路, 分路不良, 绝缘破损, 绝缘烧损