ARC FLASH HAZARD ANALYSIS AND REPORTING
Powertech conducts arc flash hazards studies to identify the presence and location of potential hazards and to recommend mitigation.
An arc flash is the sudden release of energy in the form of light and heat caused by an unintended current flowing through air from one exposed live conductor to another conductor or to ground. Such incidents can occur when insulation is compromised, a foreign object is accidentally dropped and bridges a pair of conductors, or minimum electrical clearances are violated.
The results can be fatal injuries to workers, destruction of equipment, and severe fire.
The National Fire Protection Association Guidelines (NFPA 70E) and CSA Z462 require facility owners to perform an arc flash hazards analysis prior to allowing workers to perform tasks on energized equipment.
Powertech services include the following:
Data Collection and Electrical System Verification
Powertech engineers work with qualified electricians to collect detailed information about the electrical system, including system settings, protective device tripping time, and protective device coordination. This information allows us to confirm and validate a power circuit’s single-line diagram and is utilized as a basis for modeling the system.
Simulation and Calculation
We use arc flash analysis software, which applies the latest industry standards, to calculate the would-be incident energy of an arc flash at each piece of electrical equipment in a power circuit for the various flash protection boundaries of interest using the available fault current, voltage, and fault current durations simulated with the system model.
Analysis and Recommendations
With the simulation results, Powertech analyzes potential arc flash hazards and provides recommendations for personal protective equipment (PPE), boundaries for limited and restricted approaches, flash protection, and safe work practices.
Reporting, Mitigation, and Labeling
We summarize the study, including assumptions, findings, results, values, conclusions, and recommendations in a final report. This report helps facilities owners to improve their electrical systems and utilize the findings to mitigate and resolve arc flash hazards within their premises.
In accordance with the arc flash assessment, standards require that all warning labels are updated for all electrical panels in the facility as well as any equipment subject to possible maintenance and worker interfacing. The labels identify the incident energy, limited and restricted approach distances, and flash protection boundary distance.
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