VFD stands for variable frequency drive. When used in HVAc equipment and appliances they reduce noise, use less energy, and _________ a. can match the system demand b. eleminate motor line starting shock c. eleminate short cycling d. all are correct

Another name of variable speed drive (VSD) isQuestion 7Answera.Variable Voltage/Variable Frequency (VVVF)b.Direct Torque Control (DTC)c.Field Orientated Control (FOC)d.Variable Frequency Drive (VFD)

The controller for a VFD uses microprocessors to switch on and off the wave form. The longer the switch is on the higher the output voltage will be. The speed at which the device switches on and off is referred to as _________ a. switch speed b. carrier frequency c. modulation speed d. reciprocation frequency

Variable speed drives loads are the ______ type of loads. Constant current Constant impedance Constant Power ZIP load

What are the main sections of a VFD? a. switching, filtering, switching b. rectification, filtering, switching c. filtering, switching, amplifying d. amplifying, filtering, blocking

Please tell us what you are familiar with industrial AC and DC motors, VFD’s and plant instrumentation and powerline layout, ETAP and AutoCAD or similar software design, engineering and construction and MV power systems:Please tell us what you are familiar with industrial AC and DC motors, VFD’s and plant instrumentation and powerline layout, ETAP and AutoCAD or similar software design, engineering and construction and MV power systems: