What are the different types of earthing, and why is earthing necessary for substations?

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Different types of earthing include solid earthing, resistance earthing, and reactance earthing. Earthing is necessary for substations to provide a path for fault currents to flow safely to the ground.

Solid earthing: Direct connection of the electrical system to the ground with low impedance.
Resistance earthing: Introducing resistance in the earthing system to limit fault current.
Reactance earthing: Using inductive or capacitive reactance to limit fault current.
Earthing is necessary for substations to ensure safety by providing a path for fault currents to flow to the ground and prevent electric shocks.
Earthing also helps in maintaining the voltage levels and protecting equipment from damage during faults.

What are the different types of earthing, and why is earthing necessary for substations?

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