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Arc Flash Calculations What Does It All Mean
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Arc Flash Hazard
Calculations – What does it all mean? Robert E. Fuhr, P.E. PowerStudies.com
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Acceptable & Informative
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NFPA 70E Table
130.7(C)(11)
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Short Circuit Fault
Study Coordination (PDC) Study Arc Flash Study Device Operating Time Arcing Fault Current 3 Phase Bolted Fault Current Arc Flash Label Energy Level Boundaries Required PPE Obtain Equipment Nameplate Data & Settings
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Selective Coordination 1
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Fuse TCC 3-6
Sec 5 kA @15 kA This Fuse is Current Limiting – Clearing time is 0.004 seconds
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Thermal Magnetic Breaker
20 kA 0.01-0.025 Sec 4 kA 20-50 Sec
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Current Vs Energy
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Time Vs Energy
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Line Side vs
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Your Report
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