← Calculators / Short Circuit Current Calculator (MVA Method)
// FREE CALCULATORS
Short Circuit Current (MVA Method)
Estimate three-phase, line-to-line, and line-to-ground fault currents at the transformer secondary or end of a cable run. NEC/ANSI and IEC 60909 reference.
// INPUTS
// SOURCE / UTILITY
Available from utility — use 500–1000 MVA if unknown
// TRANSFORMER
Typically 5–6% for distribution transformers
// CABLE IMPEDANCE (optional)
ft
Transformer MVA (short circuit)—MVA
System Short Circuit MVA—MVA
3-Phase Fault Current (Isc)—kA
Line-to-Line Fault Current—kA
Line-to-Ground Fault (approx)—kA
Disclaimer: For reference and preliminary estimation only. Verify results against the applicable code, project specification, and equipment data before use in design documents.
Please check inputs — all values must be positive.
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