kVA ToolsBETA — Arc Flash
Calculator
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Inputs
| System Parameters | System Voltage | |
| 3Ø Fault Current |
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| Electrode Configuration | Equipment Type | |
| Electrode Configuration | ||
| Conductor Gap |
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| Enclosure Geometry | Enclosure Height |
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| Enclosure Width |
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| Enclosure Depth |
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| Working Distance & Boundary | Working Distance |
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| IE Threshold (cal/cm²) | ||
| Arc Duration | Protective Device Type | |
| Relay Response at Iarc |
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| Relay Response at Iarc-min |
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Equipment Type auto-fills typical
Gap, Enclosure, and
Working Distance values.
Also, selecting the
Protective Device Type adds the breaker
opening time per IEEE 1584.1-2022 Table C.1 (fuses:
0 ms; LV MCCB: 25 ms; LV ICCB/PCB: 50 ms; MV CB: 80
ms) to the device response time from the
TCC curve;
Output — Results
| Quantity | Value | Units |
|---|---|---|
| Correction Factor (CF) | — | — |
| Clearing Time Used | — | s |
| Arcing Current Iarc | — | kA |
| Arcing Current Iarc-min | — | kA |
| Incident Energy | — | cal/cm² |
| — | J/cm² | |
| Incident Energymin | — | cal/cm² |
| — | J/cm² | |
| Arc-Flash Boundary | — | mm |
| — | inches | |
| Arc-Flash Boundarymin | — | mm |
| — | inches | |
| Recommended PPE Category | — | — |
| Recommended PPE Categorymin | — | — |
Only Incident Energy values are derived from IEEE 1584-2018. Recommended PPE Category reflects the corresponding minimum protective equipment required per NFPA 70E-2024 Table 130.7(C)(15)(c).
Output — Parameter Status
| Category | Status |
|---|---|
| Required Inputs | — |
| Voltage Range (208 V–15 kV) | — |
| Fault Current Range | — |
| Gap & Enclosure Limits | — |
| Working Distance ≥ 305 mm | — |
| Electrode Configuration | — |