A two conductor 1 – φ line operates at 50 Hz. The

A two conductor 1 – φ line operates at 50 Hz. The diameter of each conductor is 4cm and are spaced 6 m apart. What is the capacitive susceptance to neutral per km?

1. 1.42 × 10^–9 s/km
2. 3.25 × 10^–8 s/km
3. 4.8 × 10^–9 s/km
4. 3.06 × 10^–9 s/km

Here, D = 6m, r = 2 cm = 2 × 10^-2m

= 9.74 × 10^-9F/k m
Capacitive susceptance to netural

b_c =	1	= 2π. ƒ. C_n
	X_c

= 2π × 50 × 9.74 × 10^-9 s/km
= 3.06 × 10^-9s/k m