US AIR FORCE – VANDENBERG AIR FORCE BASE, AMERICAN WATER MILITARY SERVICES

Arc Flash Analysis and Labeling

In support of the United States Air Force at Vandenberg AFB, MasTek is conducting an arc flash analysis study and labeling the various electrical equipment that power the water apparatuses.

Data Gathering and Site Visit

MasTek collects all information and data from the electrical equipment needed to run and perform the arc flash analysis study. At each site, MasTek conducts surveys and verifies all equipment for accurate information while producing a site assessment and safety report. Additionally, MasTek produces single-line diagrams for each site if none is available.

Arc Flash Analysis

MasTek prepares the arc flash analysis which consists of reviewing and verifying data, and the loading of information into the arc flash analysis application. MasTek conducts a short circuit analysis to determine the bolted fault currents at all locations for each significant system modes. MasTek conducts a protective device analysis to evaluate protective devices and their short circuit ratings. Lastly, MasTek conducts an arc flash hazard analysis according to the IEEE 1584 and NFPA 70E standards. The arc flash analysis is performed in conjunction with the short circuit analysis and protective device coordination analysis.

Report Preparation

A final report of the studies is prepared and delivered to American Water and Vandenberg AFB. Results of the arc flash analysis are submitted and include device or bus name, bolted fault and arcing fault current level, flash protection boundary distances, working distances, personal protective equipment classes and arc flash incident energy levels. Recommendations for improvement are provided based on results from the final report.

Label Execution

MasTek installs labels at each location on de-energized equipment. The arc flash labels provided are ANSI Z535.4 compliant thermal transfer or equivalent type two color die-cut arc flash labels suitable for indoor, outdoor, chemical resistively, etc. The labels include the following information: 1. Location designation, 2. Shock Hazard Information, 3. Flash protection boundary, 4. Hazard/Risk Category (HRC) including PPE category, 5. Incident energy, 6. Working distance not to exceed 18 inches for all voltage levels.