Question

QUESTION 15

1. Why do utilities charge a power factor charge?

   		The utility has to deliver more current for the same kW billed
   		The utility has to install capacitors to compensate
   		The utility has to install conductors to compensate
   		All of the above

Answer 1

Option D is correct.

Because lets consider a single phase system,

Power (P) = V x I x power factor

Where, V=supply voltage

I= supply current

We know that the power and voltage are remained unchanged. Hence if power factor is decreased then more current is drawn. So,

Power (watts or Kilowatts) is same and same voltage. So more current is drawn. If more current is drawn, conductor size has to be increased. So, inorder to compensate the reactive power more capacitors are to be placed.

So, the utilities charge power factor charge or tariff.

Thank you and all the best