Rectangular frame construction is made of heavy guage steel plate Standard high speed 2-pole rotors ODP, WP-I, WP-II, TEAAC & TEWAC enclosures 2300 through 6600 volts 1000 through 5000 HP dependant on enclosre type Matched Stators and Rotors to reduce current densities for longer life and better efficiency A renowned Class F/H form wound stator winding insulation system t hat is backed by IEEE-429 laboratory motorette testing and over 20 years of unequaled field service, that can routinely pass water immersion testing, and survive the harshest envoronments Enduraseal insulation system uses multiple layers of highest quality Nomex/mica ground wall material plys necessary turn insulation based on boltage and specifications Stator cores have insulated steel bracer rings used to supply additional rigidity for coil head bracing API-541 test requirements Testing of electrical components and finished motors exceeds both minimum industry standards and customer requirements