在架空配电工程中,连接及切断6600伏的高压配电线及变压器的一次线的作业,现在均由人工完成。由于要求在不停电情况下作业,为了防止操作人员触电,必须配备橡胶手套、胶靴、垫肩以及防护用的橡胶管等,这样申于准备工作时间较长,一个地点的连接作业一般需要一个小时才能完成。而这项作业又极其频繁,在日本每年多达20多万次,占整个架空配电工程约5％的工作量。 In the overhead distribution project, the operation of connecting and disconnecting the 6600-volt HV distribution line and the transformer once-line is now done manually. Due to the requirement of operating without power cut, rubber gloves, rubber boots, shoulder pads and protective rubber tubes must be provided to prevent the operator from getting an electric shock. In this way, it takes a long time to prepare and the connection work in one place usually takes one hour carry out. And this operation is extremely frequent, as many as 200,000 times each year in Japan, accounting for about 5% of the workload of the overhead power distribution project.