The purpose of this document is to help the plant engineer or electrician create a preliminary calculation of the reduction of Incident Energy by applying the PGR-8800 Arc-Flash Relay.
All nameplate data should be collected by a qualified individual. The calculations below provide a worst-case scenario in 3-phase systems, as defined by IEEE 1584 calculations, and are for illustration purposes only. Actual values may vary.
To determine your specific scenario, you must contact your ARC-Flash Hazard Assessment Provider or a licensed professional engineer.
It is important to remember that performing an Arc-Flash Hazard Assessment is not an option. Arc-Flash Hazard Assessments are required by OSHA and NFPA 70E as a part of an Electrical Hazard Assessment. Arc-Flash Assessments are a serious life safety issue and essential part of a safe and comprehensive electrical safety program. OSHA and NFPA require employers to identify all potential electrical hazards in the workplace, such as shock and Arc-Flash Hazards, reduce or eliminate the hazards, train and qualify their employees, and provide them with PPE that will protect them from such hazards.