随着油浸式电力变压器容量的增大,装置的油量也随之增加,而通常的更换变压器各油路阀门作业,需要先将器身内的绝缘油排放干净,再进行阀门或油封更换,然后再将过滤后的绝缘油注入器身内,整个过程需4～12小时。注油后的变压器还需静止32小时,才可以对变压器做各项试验,费时又费力。检修人员为改变这种状况,发明了一种“负 As the capacity of the oil-immersed power transformer increases, the amount of oil in the device also increases. However, in the usual operation of replacing the oil in each oil circuit of the transformer, the insulating oil in the body needs to be drained cleanly first, then the valve or oil seal is replaced, Then filter the insulating oil into the body, the whole process takes 4 to 12 hours. After the oil transformer still need to rest for 32 hours before they can do all the tests on the transformer, time-consuming and laborious. Maintenance personnel to change this situation, invented a ”negative