Cable Accessory Failure Analysis - NEETRAC

1 Fall 2010 ICC Education SessionICC Education SessionCable Accessory Failure AnalysisF. Dean WilliamsFall 2010 Meeting2 Fall 2010 ICC Education SessionOutline Background Overall Process for an Effective Forensic Program Primary Modes of Failure Benefits of a Forensic Program Summary3 Fall 2010 ICC Education SessionBackground Significance of ProblemOldMiddle AgedNew80706050403020100 OldMiddle AgedNewAccessoriesAge DescriptionPercentage of Service Interuptions (%) Cable Cable accessories have a significant Infant mortality rate Newly installed accessories account for 20% of Accessory related service interruptions Workmanship is the Number 1 cause of Failure representing nearly 50% of the total failures The number of unknown cause of Failure is high (about 20%) showing the need for more thorough forensic evaluations Manufacturing defects represent 15% of the total failures4 Fall 2010 ICC Education SessionAnalysis of Collated Data Cable Accessories -Cause of FailureFault Type0510152025303540 Poor workmanshipManufacturing problemCorrosionMechanical DamageEventAgingOverloadUnknownMoistureO therDielectric breakdownContaminationOverheatIncorrect recordMaintenance Failure % of Total Cases5 Fall 2010 ICC Education SessionAnalysis of Collated Data Failures by Accessory VintageAccessory Vintages - All Utilities05101520253035401970-19751975-1 9801980-19851985.

Cable Accessory Failure Analysis F. Dean Williams Fall 2010 Meeting. 2 Fall 2010 ICC Education Session Outline ... • Surveys and data analysis show cable accessory failures make up a large percentage of in-service outages • About 20% of accessory failures have no known cause, indicating a

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  Analysis, Failure, Cable, Accessory, Cable accessory, Cable accessory failure analysis

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