Section 1: Project Overview
Executive Summary The following document presents the results of an Arc Flash Study performed by Interstates for the COMPANY NAME AND FACILITY in LOCATION. This report includes results for a short circuit study, coordination study, and arc flash study. The purpose of this report is to identify the risks to personnel safety and plant operation. Recommendations have been made where applicable to address all underrated equipment, protective device miscoordination, and arc flash issues. Summary of Results – Arc Flash The arc flash study results show that the site has a <high, moderate, low> arc flash hazard as shown on Table 2: Arc Flash Evaluation Report . <describe main reasons for high arc flash. One sentence per hazard type as a rule. Use list if more than two items> Recommendations have been made to reduce the arc flash hazard on equipment above <12 or 8 depends on client, use 12 unless otherwise noted> cal/cm 2 in Table 1: Recommendations . Summary of Results – Short Circuit The results of the short circuit study showed that the site has a <large number, small number, couple, etc.> of underrated equipment as shown on Table 3: Bus Evaluation Comprehensive Fault Report and Table 3A: Protective Device Evaluation Comprehensive Fault Report . Underrated equipment needs to be addressed as it presents a large impact on personnel safety. Appendix F: Short Circuit Remediation presents a small overview of short circuit ratings as well as a recommended process for remediating the underrated equipment. Summary of Results – Protective Device Coordination The results of the protective device coordination study showed that the site has <large number, small number, couple, etc.> of mis-coordinated breakers. Table 4: Protective Device Settings Report shows the settings of each breaker and Appendix C: Coordination Curves shows the time current curves (TCCs) for the main equipment that was reviewed. The coordination study examined the tripping characteristics of the breakers, fuses, and relays on site to ensure that everything will trip in the proper order for plant operation. Coordination between protective devices and motors was also examined to minimize any potential for nuisance tripping. Recommendations for improving coordination have been made in Table 1: Recommendations . Site Summary The site consists of <x> services which include <service 1> which is fed by a <pole mount? Padmount?> transformer at <voltage>, <one service 2> which is fed by a <pole mount? Padmount?>2500kVA, 12470V to 480/277V padmount transformer at <voltage>, etc. The point of common coupling with the utility is located <at each xfmr? On the MV?>. Backup generator(s) are used on site support <what equipment>. The general condition of equipment on site. Scope of Work This Arc Flash Study is being undertaken at the request of CUSTOMER’S COMPANY to analyze the electrical system in the FACILITY AND/OR AREA IN SCOPE in conjunction with PROJECT NAME CAUSING CHANGES. A computer model in the SKM POWER TOOLS power analytics software was developed from the information gathered and used to calculate the information needed to create the following reports. These calculations are based on the IEEE
SITE NAME ARC FLASH STUDY
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INTERSTATES DATE
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