Leeson are manufacturers of general purpose three phase AC motors in TEFC and ODP enclosures. Both types feature 230/460V ratings nameplated for 208 Volt operation, and most 60Hz models nameplated for 50Hz. Both TEFC and ODP 3 phase motor types also feature up to 400 hp for steel frame, up to 350 hp for cast iron frame, and up to 30 hp for aluminum frame construction with 1200, 1800 or 3600 rpm options.