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:
- 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.
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Hi, I am an electrical engineer and can prove to be a blessing in disguise for you as far as this project is concerned. Thank You for your time and consideration.