Gtake brand inverter are good alternative ABB'S ACS550 AND ACS800, the features below: 1.Adopt ti's dsp, and infineon's 4th generation igbt module. 2.Two expansion ports for pg cards for ABZ , UVW, resolver encoder. 3.Thick three-proofing lacquer coated for bad working condition. 4.Main and auxiliary settings and switch over. 5.V/f separated control mode, the output voltage and frequency can be set separately. It's helpful for the variable frequency power supply and torque motor application. 6.Parameter copying(upload and download) function 7.Two sets of motor parameters could be configured, easily run two motor alternately by the control panel. 8. Under vector control with pg, running zero-servo, main axis position control, feed-forward control, pulse serial position control and other position control. 9.Torque control upon the open-loop vector mode and the close-loop vector mode 10.Used for induction motor, servo motor, pmsm and industry particular motor 11.Pg feedback mode: ABZ encoder, uvw encoder, resolver 12.Servo control: main axis orientation control, simple feed forward control, pulse train position control 13.Load distribution function Gk600 technical specifications Rated voltage 3-phase ac380v/ac400v/ac415v/ac440v/ac460v/ac480v Frequency 50hz/60hz, fluctuation range5% Allowable range of voltage Continuous voltage fluctuation 10%, short fluctuation -15%~+10%, i.E. 323v~528v; Voltage out-of-balance rate Cardboard box, plywood carton