FC 300 Design GuideHow to Read this Design GuideSet-up:You can save parameter settings in four set-ups. Change between the four parameter set-upsand edit one set-up, while another set-up is active.SFAVMSwitching pattern called S tator F lux oriented A synchronous V ector M odulation (par. 14-00).Slip Compensation:The adjustable frequency drive compensates for the motor slip by giving the frequency asupplement that follows the measured motor load.Thermistor:A temperature-dependent resistor placed where the temperature is to be monitored(adjustable frequency drive or motor).Trip:A state which occurs in different situations, i.e. DC link voltage is too high or too low, motor temperature is toohigh, etc. A trip can be canceled by pressing reset or, in some cases, be programmed to reset automatically.Trip Locked:A state which occurs in different situations, i.e. short circuit of motor terminals, ground fault, etc. Alocked trip can be canceled by cutting off mains and restarting the adjustable frequency drive.VT Characteristics:Variable Torque characteristics used for pumps and fans.VVC plusIf compared with standard voltage/frequency ratio control, Voltage Vector Control (VVCplus) improves thedynamics and the stability, both when the speed reference is changed and in relation to the load torque.60∞ AVMSwitching pattern called 60∞ A synchronous V ector M odulation (par. 14-00)." Power FactorThe power factor is the relation between I1 and I RMS .The power factor for 3-phase control:The power factor indicates to what extentthe adjustable frequency drive imposes aload on the mains supply.The lower the power factor, the higher the IRMSfor the same HP/kW performance.In addition, a high power factor indicates that the different harmonic currents are low.The FC 300 adjustable frequency drivesí built-in DC coils produce a high power factor,which minimizes the imposed load on the mains supply.12 MG.33.B3.22 - VLT is a registered Danfoss trademark
