Q: What is phase sequence checker?
A: It checks the order of phase R-Y-B
Q: Why it is needed?
A: It is needed to run motor in desired direction
Q: Where is it applicable?
A: It is applicable in industries for ensuring right direction of induction motor rotation.
Q: What happens when any phase is out of sequence?
A: It will cause the induction motor to rotate in reverse direction, and incase it connected to a pump, this will lead to reverse pumping.
Q: Which microcontroller is used in this project?
A: A 20 pin microcontroller from 8051 family is used in this project.
Q: What is the formula for calculating smoothing capacitor value?
A: There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.