The 1KVA solid state frequency converter specifications 400hz include a voltage of 120V or 220V. The voltage range is120V -15%/+20% or 220V -15%/+20%. The 1KVA solid state frequency converter 400hz requires 220V - 5.2A @ Full Load (7.8A @ Current limit) or 120V - 9.6A @ Full Load (14.3A @ Current limit). The single phase 400hz converts frequencies of 50Hz or 60Hz. If a short circuit occurs the unit will cut off and must be manually restarted. Inverter auto cut-off occurs when heat sink temp is over 80ºC. Compare our prices with those of other power supplies. Make an informed decision before you buy.