The 97F9632 GEM III is designed specifically for the motor run applications where the capacitors are used in conjunction with permanent split capacitor type motors. They may be used on either 50 or 60Hz systems but should not be used at higher frequencies or in applications where higher frequency harmonics are present. The Regal-Beloit's GEM III capacitors are manufactured with high-grade metallised polypropylene film. The film is wound into capacitor rolls on high-speed, high precision machines. The winding is extremely tight so that there is not enough space between the layers for corona (localized partial electrical discharges) to occur. The rolls are sprayed on both ends with metal to make the connection to the extremely thin edges of the metallised electrodes.