ZL is a load which absorbs 4 kVA with pf09 lagging Find the

Z_L is a load which absorbs 4 kVA with pf=0.9 lagging. Find the ideal-transformer turns ration n. Find the P_L and Q_L values at the load. Find the value of C to correct the feeder pf to i.o.

Solution

a. We know that

turns ratio(n) = Es/Ep= Ns/Np

Where,

Es= voltage induced in secondary coil

Ep= voltage induced in primary coil

Ns= number of turns in secondary coil

Np= number of turns in primary coil

Now put the values of Es and Ep from the quoestion given

n = 9100/480= 19 ( approx)

b. As poer at the load, V

P = Np/Ns* voltage at the secondary winding

Putting the values, the answer will be 25.6 V.