Schneider Electric ATV930D22Y6 Altivar™ 3-Phase Variable Speed Drive, 500 to 690 VAC, 27.6 A at 500 V/26 A at 690 V Normal Duty, 23.2 A at 500 V/23 A at 690 V Heavy Duty, 25 hp at 500 V/30 hp at 690 V Normal Duty, 20 hp at 500 V/25 hp at 690 V Heavy Duty