The Instek ASR-002 three-phase power controller is able to control up to 3 single-phase power supply units (ASR series only). It effectively makes AC output conformed to 1P3W/3P4W that generally unit requires, and also turns output into 3P3W via designated wire method. When the select single-phase power is greater than the capacity of 2kVA, it is suggested that output should be connected to the external terminal for safety consideration.