铁路通信信号工程技术2024，Vol.21Issue(z1)：129-132,4.DOI:10.3969/j.issn.1673-4440.2024.Z1.032
站内机械绝缘节绝缘电阻测量探讨
Research on Measurement of Insulation Resistance of Mechanical Insulated Joints in Stations
摘要
Abstract
The mechanical insulated joints of track circuits are used for electrical isolation between track circuit sections.When the insulation resistance decreases,"leakage current"phenomenon may occur between adjacent sections.In severe cases,the signals crossing the area will affect the normal operation of onboard and track circuit equipment.The measurement of insulation resistance of insulated joints includes offline measurement before installation and online measurement after installation.Before installation,a megger or multimeter is used for accurate measurement.After installation,an online testing tool for track insulation is used for measurement.Currently,the testing instruments used in China only apply DC voltage signals to the steel rail surfaces at both ends of a mechanical insulated joint,and calculate the insulation resistance based on current and voltage.This insulation resistance is actually the parallel resistance value between the insulation resistance of the mechanical insulated joint and the external circuit,which cannot truly reflect the insulation performance of the mechanical insulated joint.This article explores a new measurement method that can effectively solve the problem of external circuits in mechanical insulated joints and more accurately reflect the resistance value of these joints.关键词
轨道电路/机械绝缘节/绝缘电阻/在线测量Key words
track circuit/mechanical insulated joint/insulation resistance/online measurement分类
交通工程引用本文复制引用
杜晓鑫,高佳佳..站内机械绝缘节绝缘电阻测量探讨[J].铁路通信信号工程技术,2024,21(z1):129-132,4.基金项目
中国铁路北京局集团有限公司北京西电务段课题项目(2024BD01) （2024BD01）
