Oil impregnated electric device

摘要

There is disclosed an oil impregnated electric device in which an element of the device is impregnated with a mixture of an arylalkane compound such as 1,1-phenylxylyl ethane and an organic phosphorus compound such as phosphate or phosphite. Such electric device has a high power density (i.e., capable of withstanding high electric field) and a high reliability.