过载保护技术是低压电器智能化技术的重要组成部分，是保证电动机、配电线路安全运行的重要技术。
The over-load protection technology is an indispensable constituent of the low-voltage apparatus intellectualization, ensuring the electric motor and the distribution line safe operation.
城市轨道交通既有高架线路作为城市交通的重要组成部分，其运营的安全性极为重要。
As elevated urban rail transit line is a component of urban traffic, the safety of its operations is extremely important.
针对列车的安全运行状况，提出了列车安全状态监测和诊断系统的基本组成，并对车载微机检测系统的设计、专家系统的建立、列车与线路的互监互测等系统的几个关键技术问题进行了分析。
The several key technical problems of design of on-board microcomputer detecting system, setup of expert system, and mutual monitoring and detecting system between train and track were analyzed.
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