Design rules for Switchyard & Substation
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Switchyard & Substation
Bus current: I = MVA / (√3 · kV)Fault current: Isc = MVA / (√3 · kV · Z)Earth conductor size: A = I · √t / k- Step/touch potential per IEEE 80
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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
Catalogue categories: Switchgear, Transformers, Cables, Earthing
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Standards cited by number for reference; verify designs with a qualified engineer.