Abstract: The insulation system of Ranbar
copolymer resin and Electrolock mica tape was
evaluated on a 6900-volt system and showed
outstanding moisture and chemical resistance. In
addition, the dissipation factor at elevated
temperatures up to 200°C remained under 10%.
Because of these results the following evaluation
was undertaken to determine if the resin system
would also be capable of satisfying the requirements
for a system that could be used on motor and
generator coils. The Insulation system will also
employ a mica turn magnet wire (no enamel or
glass) that will withstand repeated high surges for
13,800-volt application. This paper includes testing
results on the 13,800-volt system to IEEE standards
and comparisons it to an existing epoxy anhydride
high voltage system that is presently used in the
field today. This system was evaluated for turn to
turn testing, repeated surges (36,000 surges @
22,632 volts), dissipation factor, voltage endurance
at 155"C, dielectric breakdown, and chemical
resistance.