ESM Engineers have experience providing load analysis studies to identify operation issues due to power quality. We have performed site assessments, equipment troubleshooting services and arch flash studies to identify potential hazards on a work site. What is an Arc Flash Study?

Arc flash studies are performed to assess an electrical system for arc flash hazards. Our engineers follow NFPA-70E and IEEE guidelines to assess the potential risk in an electrical distribution. 

An arc flash occurs as the result of a single phase or three-phase fault which produces a blinding electrical arc at temperatures exceeding 35,000 degrees F. The extreme heat of an arc flash can vaporize metals, the blast will severely damage nearby equipment and cause bodily harm to working personnel. An arc flash analysis evaluates the potential hazards and provides usable data to engineer protective systems and develop solutions to mitigate the risks of an incident and prevent equipment damage, and unnecessary downtime.

An arc flash study (arc flash analysis or  hazard analysis) is a study of a the facility's electrical power distribution. An existing or new system is modeled using site specific worst case scenario operational configurations to evaluate the potential hazards that exist at the equipment. The report identifies the levels of incident energy present during a fault; this allows the end-user to obtain the recommended personal protective equipment (PPE) for employees to safely work on the equipment. 

OSHA 1910.132(d) requires employers to "assess the workplace for hazards." Arc flash is one of the electrical hazards recognized by OSHA and NFPA 70E - 2012. NFPA 70E - 2012 article 130.5 requires an arc flash hazard analysis calculation be performed with the only exception being use of 70E tables, if you meet the table parameters. It often requires an engineering evaluation to determine if you can use the tables.

Our engineers' on-site data collection procedures ensure accurate system modeling, one-line drawings, fault current and device coordination results. We use ETAP, Easy Power, or SKM software packages to give the best, most usable results.