Short Circuit Calculator

⚡ Short Circuit Calculator

Fault Type: Fault Current (kA): Impedance (Z%): Base Voltage (kV): X/R Ratio (optional): System Frequency (Hz):

📘 Note: MVA = (Fault Current * 100) / Z% | kVA = √3 × V × I (or V × I for LG/LL) | Per-unit = kVA × Z% / 1000
🔍 X/R Ratio is used to estimate DC offset and peak asymmetrical current (for AC+DC peak estimates)

🧠 Visual SC Impedance Diagrams

Sequence Components: R1 (Positive), R2 (Negative), R0 (Zero) — essential for protection studies.

These diagrams illustrate the positive, negative, and zero sequence networks involved during short circuit faults. They are key for understanding protection coordination and system stability analysis.