在用电动单梁起重机电路绝缘电阻测量方法的改进

毕海榕

摘 要：绝缘电阻是反映导电线路安全性的重要指标，当导电线路受热，受潮，绝缘层材料老化破损，其绝缘电阻便会降低，从而造成电器设备漏电电击伤人或短路事故的发生。在用电动单梁起重机导电线路多附着在其钢结构上，并随设备在高空运行，如何对主电路绝缘电阻进行测量，如何避免检验人员高空检验的危险性，数年来起重行业一直在不断探索寻求一种检测结果准确，检验人员安全，检测方法快捷便利的检测方法检验工艺。本文主要讨论在用电动单梁起重机主回路绝缘电阻的测量方法，现场检验中存在的问题，并就如何避免检验人员高空作业，保证测量数据准确可靠，提出检验工艺检测方法的改进措施。

关键词：绝缘电阻;电动单梁起重机;检验工艺;测量方法

Improvement of Measurement Method for Insulation Resistance of Electric Single Beam Crane in Use

BI Hairong

（Yantai Inspection and Research Institute of Special Equipment， Yantai， Shandong， 265500 China）

Abstract：Insulation resistance is an important index to reflect the safety of conductive line. When the conductive line is heated and damped， the insulation layer material is aging and damaged， the insulation resistance will be reduced， which will cause electric leakage， electric shock or short circuit accident of electrical equipment. In the use of electric single beam crane， the conductive line is mostly attached to its steel structure， and along with the equipment running at high altitude， how to measure the insulation resistance of the main circuit， how to avoid the risk of high-altitude inspection by inspectors， the lifting industry has been constantly exploring for a kind of inspection method and inspection process with accurate detection results， safety of inspectors， fast and convenient detection method. This paper mainly discusses the measurement method of insulation resistance of main circuit of electric single beam crane and the problems existing in the field inspection， and puts forward the improvement measures on how to avoid the inspection personnel working at height and ensure the accuracy and reliability of the measurement data.

Key Words：Insulation resistance; Electric single beam crane; Inspection technology; Measurement method

0 引言

絕缘电阻测量的依据是《JB/T 1306-942008 电动单梁起重机》4.9.74.4.1.6： 起重机的电气设备全部安装后，其主回路对地绝缘电阻在一般环境中应不小于0.8MΩ，在潮湿环境中应不小于0.4MΩ起重机常温绝缘电阻值不应小于1MΩ。《GB 6067-85 起重机械安全规程》3.4.9.2 对地绝缘电阻：主回路与控制回路的电源电压不大于500V时，回路的对地绝缘电阻一般不小于0.5MΩ，潮湿环境不得小于0.25MΩ，测量时应用500V的兆欧表在常温下进行。

《起重机械监督检验规程》起重机监督检验内容要求与方法，桥架型起重机6.2 线路绝缘：《TSG Q7015-2008 起重机械定期检验规则》附表B中的B7.2要求：额定电压不大于500V时电气线路对地的绝缘电阻，一般环境中不低于0.8MΩ，潮湿环境中不低于0.4MΩ。……