Epoxy casting insulation of oil immersed motors for submersible vessels in deep sea

Trial production of a submersible motor for use in a deep sea research vessel with a submersible depth of 6,000 m has been completed and functionally satisfactory data have been obtained by experiments. Severe characteristics are required for the insulation to be used in this motor. The main difficulty for the insulation is resistance to the high pressures of sea water.