High voltage heavy current leads for liquid helium cryostats

Properties of insulation for high voltage cryoelectric equipment are considered. The results of investigation into surface dieletric strength under cryogenic conditions of bushing models made of monolithic teflon are discussed. New designs for heavy current leads for liquid helium cryostats, based on the obtained results, have been suggested and built. The current leads ere tested at 80 and 100 kV with 5.5 kA current and the results are presented.