In this paper

COMSOL software is used to simulate three-dimensional electric field with the finite element method to get the different minimum insulation distances in different lead wire structures of 10 kV.Besides

verification has been done with physical structure models of different structures based on the simulation results

and the final conclusion is drawn with at least 60%reduction than the original standard.This paper puts forward new round lead wire minimum insulation distances that suit to nowadays transformer design

and provides a reference for new manufacture standard.