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Fault Current
Estimate prospective short-circuit fault current at the cable end using I ≈ V/Z, from transformer, known PSCC or measured Ze.
The Ensign ToolboxFault CurrentEstimate prospective short-circuit fault current at the cable end using I ≈ V/Z, from transformer, known PSCC or measured Ze.
Supply
V
Drives √3 divisor (3φ) and return-conductor R doubling (1φ loop).
kVA
%Z
Cable run
m
Affects R only — X is temperature-independent.
Cable impedance
Ω/km
Typical for LV multicore/trefoil
Enter values to calculate fault current