... which supplies Sensorless Vector Control(SVC). Detailed Product DescriptionVariable Frequency Drive:single or 3 phase, PID Control Function , Up to ... 25 fault protections ,Automatic Voltage Regulation (AVR) Function ,multi-step speed , multiple torque setting source ,output freq.0.1-600HzThe combination ... .2G)Protection rateIP20 2013 New Sensorless Vector Control Inverter,B504 Variable Speed Drive !