Substation earthing design
Substation earthing is critical both to the operational performance of the power system, and the provision of a safe working environment. It is a salient area of design when either constructing a new substation or extending or modifying an existing substation. Substation earthing is a highly specialist subject in its own right, and therefore this chapter will provide an overview of the basic theory and key requirements, relevant to power network construction, as summarised below: Objectives and regulations, Resistivity, Earth electrode systems, Earthing conductors and earth mats, Earthing system and earth fault current, Voltage limits, Practical considerations, Earthing design considerations.
Substation earthing design, Page 1 of 2
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