What is the function and importance of an earthing system?

The function and importance of an earthing system lie primarily in its role in connecting electrical systems to the ground, which is essential for safety and voltage stability. By grounding electrical systems, any fault currents are directed safely into the Earth, reducing the risk of electric shock to personnel and minimizing damage to equipment. This connection to the ground helps establish a reference point for the system’s voltage levels, which is crucial for maintaining the overall stability of electrical operations.

In high-voltage substations, for instance, an effective earthing system can greatly help in dissipating fault currents and preventing dangerous voltage levels from creating potential hazards. It also aids in protecting sensitive equipment from overvoltages caused by lightning strikes or switching surges. Thus, an earthing system not only safeguards human life but also ensures the reliable and efficient operation of electrical systems.