Earthing & Lightning Systems

Earthing & Lightning Systems

Purpose of Earthing

1. Safety for Human life/ Building/Equipment

• To save human life from danger of electrical shock or death by blowing a fuse i.e. To provide an alternative path for the fault current to flow so that it will not endanger the user

1. Over Voltage Protection

• Lightning, line surges or unintentional contact with higher voltage lines can cause dangerously high voltages to the electrical distribution system. Earthing provides an alternative path around the electrical system to minimize damages in the System.

1. Voltage Stabilization

• There are many sources of electricity. Every transformer can be considered a separate source. If there were not a common reference point for all these voltage

In electricity supply systems, an earthing system or grounding system is circuitry which connects parts of the electric circuit with the ground, thus defining the potential of the conductors relative to the Earth's conductive surface. The choice of earthing system can affect the safety and electromagnetic compatibility of the power supply. In particular, it affects the magnitude and distribution of short circuit currents through the system