The corona loss on a particular system at 50 Hz is 1.2 kW/phase per km. The corona loss on the same system with supply frequency 60 Hz will be
The corona loss on a particular system at 50 Hz is 1.2 kW/phase per km. The corona loss on the same system with supply frequency 60 Hz will be
Right Answer is:
1.36 kW/phase/km
SOLUTION
Given-
f1 = 50 Hz
f2 = 60 Hz
PL1 = 1.2 kW / km / phase
Corona Loss (PL) ∝ (f + 25)
$\begin{array}{l} \frac{{{P_2}}}{{{P_1}}} = \frac{{\left( {{f_2} + 25} \right)}}{{\left( {{f_1} + 25} \right)}}\\ \\ {P_2} = \frac{{60 + 25}}{{50 + 25}} \times {P_1} \end{array}$
P2 = 1.36 kW/phase/km