轨道车辆载流分析及电缆选型设计

打开文本图片集

摘 要：本文根据城市轨道车辆的回流电路并联分流的特点，从布线施工、电缆选型、线路阻值等方面进行电路实际电流情况分析，反向验证电缆选型是否满足要求，避免因支路电流超过电缆承载能力而出现电缆失效的情况，也为存在类似并联分流电路的城轨车辆提供一种电缆选型的理论计算方法。

关键词：轨道车辆；电流分析；电缆选型

CurrentAnalysis and Cable Selection of Rail Rolling Stock

Liu Mingyu Tang Renjie

CRRC Zhuzhou Locomotive Co.，Ltd HunanZhuzhou 412001

Abstract：According to the characteristics of parallel shunting of the return circuit of urban rail vehicles，this paper analyzes the actual current of the circuit from the aspects of wiring construction，cable selection，line resistance，etc.，and reversely verifies whether the cable selection meets the requirements，to avoid cable failure due to the branch current exceeding the cable carrying capacity，and also provides a theoretical calculation method for cable selection for urban rail vehicles with parallel shunting circuits.

Keywords：railtransit；Current analysis；Cable selection

1 概述

城市轨道交通车辆通常会存在一些并联分流的电路，我们习惯于不同支流选用同一款线型，而往往在实际的电流测试过程中会发现，并联分流的电路里电缆载流情况极不平衡，同一回路中有些电缆的载流超过自身承载能力，有些电缆的载流极小甚至出现负电流情况。（剩余2183字）