Arc-Flash Hazard Analysis- Solar Photovoltaic systems

Engineer to perform analysis on 13 distinct 40kW solar photovoltaic systems and their associated switchgear. A detailed spec follows: A. Systems and equipment shall be designed and furnished to minimize worker exposure to potential arc flash hazards to the extent practical. At a minimum, the auxiliary electrical system shall meet the requirements of NFPA 70E and IEEE 1584. B. At a minimum, switchgear shall be provided with remote breaker racking devices and, if provided, local breaker controls operable in the “connected” position shall be located outside the flash protection boundary. The use of high-speed relaying, “maintenance switch” schemes or other method to minimize available incident energy levels is acceptable. Alternatively, switchgear of Type 2 arc-resistant construction, in accordance with IEEE/ANSI C37.20.7, may be provided. C. Contractor shall calculate incident energy levels for each bus in accordance with the method contained in IEEE 1584, Guide for Performing Arc-Flash Hazard Calculations. Results shall be summarized into a Flash Hazard Analysis report which shall be submitted to the System Owner for review and approval. At a minimum, the Flash Hazard Analysis report shall contain the following information: - Tabulation of worst-case results for each bus, including: - Voltage - ID of protective device clearing the fault - Total arcing current at arc fault - Total fault clearing time - Incident energy level - Working distance - Flash protection boundary - Hazard/risk category D. As a minimum requirement, labeling providing incident energy level, hazard/risk category, personal protective equipment (PPE) requirements, and flash protection boundary shall be provided and affixed to each electrical equipment enclosure as required.