This paper analyzes an explosion accident of a dry-type high voltage current transformer in Hengyu 110 kV substation

and find the accident is due to improper welded structure of the end shield and mechanical damage of the braiding copper wire

which causes the end shield imperfectly earthing.Some countermeasures against the explosion accident are suggested

including that the current transformer cabinet should have explosion-proof function in design

and the welded structure of the end shield wire should be improved

etc.