A new class F armature insulation system for turbine-generators

A new high voltage epoxy resin-impregnated mica paper insulation system has been developed for the armature windings of turbine-generators. This new system was specifically designed for operation at Class F (155°C) temperatures, with a life expectancy comparable to that of epoxy resin-impregnated mica insulation systems operating at Class B (130°C) temperatures.