FAQs for Switchyard & Substation
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Switchyard & Substation
33 kV or 11 kV supply?
Decided by contract demand and the utility's supply code.
What is IEEE 80 used for?
Designing the earth mat so that step and touch voltages during a fault are safe.
Is soil resistivity testing needed?
Yes, Wenner four-pin testing is the input for the earth-mat design.
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Calculators: Switchyard 66/33/11 kV calculator · Power Transformer calculator · CT/PT & Protection Relays calculator · Earth Mat calculator · Gantry & Structures calculator
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Standards cited by number for reference; verify designs with a qualified engineer.