Estimate DC arc flash incident energy for PV systems using IEEE 1584 methods and calculate PPE category.
Input Parameters
Results
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Arc Power
kW
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Incident Energy
cal/cm²
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PPE Category
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Arc Flash Boundary
inches
Note: DC arc flash hazards are real in PV systems. NEC 110.16 requires arc flash labels. Rapid shutdown (NEC 690.12) reduces risk by de-energizing conductors.
Reference
Arc Voltage ≈ 0.5 x System Voltage
Arc Power = V_arc x I_arc
Incident Energy = Arc Power x Time x 610 / D²
Arc Flash Boundary = D x sqrt(IE / 1.2)
D in cm, IE in cal/cm²