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RIVERSIDE PUBLIC UTILITIES <br />Board Memorandum <br />P U B L I C U T I L I T I F$ <br />BOARD OF PUBLIC UTILITIES DATE: AUGUST 7, 2015 <br />ITEM NO: 6 <br />File ID — 15 -2456 — C <br />SUBJECT: PROTECTIVE DEVICE COORDINATION AND ARC FLASH STUDY — WORK ORDER <br />NO. 1601108 FOR $146,755 <br />ISSUE: <br />The issue for Board of Public Utilities consideration is approval of Work Order No. 1601108 to perform a <br />protective device coordination and arc flash study. <br />RECOMMENDATION: <br />That the Board of Public Utilities approve the capital expenditure of $146,755 for Work Order No. <br />1601108 for a protective device coordination and arc flash study. <br />BACKGROUND: <br />The various devices installed in substations that comprise the protection system are critical components <br />for maintaining the integrity and reliability of the electric system. The Electric System Master Plan <br />recommended a comprehensive protective device coordination and arc flash study to help reduce the <br />number of customers affected by an outage and to reduce the risk of equipment damage. In 2012, <br />Riverside Public Utilities' (RPU) staff conducted an arc flash rapid assessment study in compliance with <br />industry standards. Subsequently, staff has determined that a new study is necessary to evaluate system <br />changes on the electric network. <br />Staff recommends conducting a comprehensive protective device coordination and arc flash study to <br />evaluate existing equipment capabilities, evaluate existing protection schemes, recommend <br />improvements to avoid nuisance outages, and determine arc flash levels and hazard /risk categories to <br />support RPU's selection of personal protective equipment. <br />The protective device coordination and arc flash study will be performed by a consultant from RPU's <br />Energy Delivery Engineering Consultant Panel and will be supervised by RPU engineering staff. Capital <br />Improvement Project(s) will be initiated based on this study. <br />FISCAL IMPACT: <br />The capital expenditure for Work Order No. 1601108 is estimated to be $146,755 as summarized in the <br />following table: <br />Description <br />Amount ($) <br />% of Total <br />Consultant Services <br />$130,455 <br />89% <br />RPU Engineering and Overhead <br />$16,300 <br />11% <br />$146,755 <br />100% <br />Sufficient funds are available in Public Utilities' Account No. 6130000 - 470655. <br />