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Hilton Mills

Substation Safety: When “Dirt Cheap” is Bad

By Conduit

Ground Grid Design & Soil Electrical substations are built across the country, comprising a wide range of dimensions and voltages from 4.16kV up to 500kV. These substations are subject to electrical faults, of which 80% are single line to ground (SLG) faults. These fault currents can vary from a few hundred to many thousands of amperes. When designing an electrically safe substation, the cornerstone of any site is the native soil resistivity. Prior to design,…

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