Micalastic-insulation experience and progress

MICALASTIC^® insulation is used successfully since 10 years for high-voltage windings of large electrical machines. This insulation system is built up on a basis of mica and synthetic curable resins. Waterwheel-generators, turbo-generators, synchronous condensers and large motors are provided with this type of insulation. The highest rated voltage of machines designed up to date is 21 kv, and the highest rating per machine is 440 MVA. More than 200 machines representing a total rating of approximately 14 Mill. kvA have been provided with Micalastic insulation.^{1, 2, 3}