VFD, Basic Compact Driver for AC motors speed controls（Delta-1）
Delta-1 is a customized made variable-frequency drive (VFD) by Delta company. It can be used in the TrolMaster Hydro-X Pro system to control the speed of AC motors (industrial fans etc.). An RJ45 cable is included for connecting with the TrolMaster VFD-1 module. This customized version has had all the parameters preset and ready to be operated with VFD-1 module straight out of the box.