Due to the working feature of arc furnace transformer that the secondary voltage of large current

the problems of temperature rise and leakage flux field of transformer become extraordinary extrusive. By analyzing the influence of different materials of tank wall and the separate space of electrical conductor at tank wall of secondary side on the distribution of leakage flux field and temperature field

this paper settles down the appropriate material of tank wall and suitable exit structure. By comparing and analyzing the magnetic inducting intensity of wall with various materials of tank wall of secondary side

it is concluded that the adopting of stainless steel plate for the secondary side of arc furnace transformer with large capacity and large current

together with"triangle"shape arrangement for exit copper row is reasonable and effective.