The electrical system of the utility or industrial facility is modeled using Milsoft or SKM software based on information provided by the customer. The model incorporates conductor, transformer, and source impedances. A short-circuit (fault current) study is then performed. Protective devices and their settings are added to the model, and overcurrent coordination is evaluated for each device in relation to upstream and downstream devices on the same circuit. Equipment interrupting ratings are also verified. Where coordination deficiencies are identified, recommendations are provided to improve system performance.
Once device coordination is confirmed, an arc flash analysis is conducted using the fault study results along with protective device types and settings. Incident energy levels are calculated at specified locations in accordance with applicable IEEE and NFPA standards, and appropriate Personal Protective Equipment (PPE) requirements are determined for each location. Areas with elevated energy levels are further evaluated to determine whether mitigation measures can reduce the associated risk. Where applicable, arc flash warning labels are recommended for field installation, identifying incident energy levels, approach distances, and required PPE. Upon completion of the study, training is offered to ensure personnel understand the results and can apply them safely and effectively.
