Abstract

A new composite polyester-glass reinforced silicone rubber/mica insulation system, designated Mycone?, has been developed for high-voltage turbine generators. This system is capable of operating at Class F (155°C) temperatures, with a life expectancy comparable to that of a standard type modified asphaltmica insulation system operating at Class B (130°C) temperaturese. Use of the system will afford an increase in generator armature capability in the order of 15 percent. Although domestic industry standards do not yet include the operation of turbine-generator units above Class B (130°C) operating temperatures, many special situations exist where increased capability is of prime consideration.

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