Peterson coil is employed in power lines for:
- Compensating arcing grounds
- Increasing the voltage level
- Reducing Ferranti effect
- Improving power factor
Correct answer: 1. Compensating arcing grounds
Explanation: A Peterson coil, also termed as a zigzag grounding transformer or arc suppression coil, is employed in power systems to compensate for arcing grounds. Arcing grounds occur when there is a fault in the power system, leading to the flow of ground currents. These ground faults can produce arcing, which is undesirable and can lead to damage of equipment and disruption of the power system.
The Peterson coil is designed to introduce a compensating voltage into the system that opposes the arcing ground current.