Question

The corona loss on a particular system at 50 Hz is 1 kW/Km/phase. What is the corona loss at 60 Hz in kW/Km/phase?

• A. 1.2
• B. 0.83
• C. 1
• D. 1.13

Answer 1

The correct option is D 1.13

We know that corona loss is $\propto (f+25)$
Here, $f_1=50Hz$
$f_2=60Hz$
$\frac{P_2}{P_1}=\frac{f_2+25}{f_1+25}$
$\Rightarrow \frac{P_2}{P_1}=\frac{60+25}{50+25}=\frac{85}{75}=1.133$