... phase, 220V AC 1.5~2.2KW inverter VVVF control, constant,vairable torque mode VD4 series single phase, 220V AC 1.5 ... to avoid trip caused by over-currentFix-length controlThe frequency inverter will stop when reaching the fixed lengthCommunicationfunctionWith RS485 port, ... protectionOption partsextension cable of digital panel; brake resistor. frequency inverter Xinje VD4 series frequency inverter