- 20 km
- 80 km
- 240 km
- 600 km
Answer: 2. 80 km
Explanation:
Short transmission lines:
- The effective length of a short transmission line is less than 80 km.
- When the length of an overhead transmission line is up to about 50 km to 80 km and the line voltage is comparatively low (< 20 kV), it is usually considered as a short transmission line.
- Due to smaller lengths and lower voltage, the capacitance effects are small and hence can be neglected.
- Therefore, while studying the performance of a short transmission line, only the resistance and inductance of the line are taken into account.
