Substation Ground Grids 
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Grounding systems are an integral part of any working substation. These ground grids offer a low impedance path to earth for ground fault currents or currents from devices such as surge protectors or lightning rods. Important functions of substation ground grids include:

- Supplying neutrals for generators, transformers, etc with an earth connection.

- Limiting potential differences between metallic components of the substation and the earth.

- Allowing a grounding point to de-energize equipment for maintenance safely.

Ground system testing