Power factor correction (Electrical Engineering) 1

Question

In an inductive circuit, power factor correction is accomplished by adding capacitors either in parallel or in series. But in practice, parallel connected capacitors are commonly used. Why?

Answer 1

Adding an inductive component will also add a finite resistance and is therefore less preferable. Furthermore inductors tend to be more expensive, bigger and heavier.

Answer 2

If the capacitors were connected in series, then all of the capacitor equipment would need to be sized for the entire load.  (Current is always the same in a series circuit)  It is far more economical to place the capacitors in parallel with the load needing PF correction.

This allows multiple smaller capacitors, with leads, protective devices, and other ratings just for the size of the capacitor bank.  Not the entire circuit.

During maintenance, the capacitors can be removed from service and the load allowed to run with a poor PF while repairs are made.

Answer 3

in case of a failure in the capacitor it will allow the load to continue working with a lesser power factor  if it is connected in parallel..

under series connection the failure in caps. will stop the power to the load.