... frequency, fixed length control. AC380V 0.7~3.7KW frequency inverter, CE, ISO9000 certification.VB3-40P7Suitable motor: 0.75KW, ... 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 VB3 series AC frequency ...