【摘要】 本文以辽宁某公司钢水包倾覆事故为切入点,介绍了相关安全技术规范和标准对起重机电动机定子异常失电保护的有关规定和要求;以吊运熔融金属的桥式起重机为例,分析探讨了该电气保护在卷扬式和电动葫芦式起重机起升机构中应用的常见电路以及该电气保护的试验方法和合格判定。更多还原

【Abstract】 This article takes the ladle overturning accident of a company in Liaoning province as a starting point,and introduces the relevant regulations and requirements of the safety technical standards for the protection of crane motor stator abnormal power loss.Taking the bridge crane for lifting molten metal as an example,the common electrical protection circuits used in hoisting mechanisms of hoisting and electric hoist cranes are analyzed and discussed.And also,the paper introduces how to test the protection circuits and their qualification.更多还原