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Partial Discharge Testing for Cables - Emerson Network Power

Partial Discharge Testing for Cables - Emerson Network Power

Partial Discharge Testing for Cables - Emerson Network

Service Data Sheet Ref. No. PM-02-301-A December 2008 Partial Discharge Testing for Cables � Performed online without disrupting plant or facilities, or offl ine when required � Non-destructive, noninvasive predictive maintenance tool � Optimizes capital expenditures and improves system reliability � Helps eliminate unplanned outages and lost profi t as a result of system downtime � Identifi es and prioritizes cable sections and terminations for replacement � Focus on the right cables for targeted investment - minimizes unnecessary spending www.assetweb.com/ers Condition Assessment of Cables Partial Discharge can occur at voids, gaps and similar defects in medium and high voltage cable systems. If allowed to continue, partial discharge will erode the insulation, usually forming a treeshaped pattern of deterioration (electrical tree) and eventually result in complete breakdown and failure of the cable or accessory. Such failures cause unplanned power outages, loss of plant production, equipment damage, and/or personnel injury. Data obtained through Partial Electrical Reliability Services Discharge testing and monitoring can provide critical information regarding the quality of insulation and its impact on cable system health. By detecting and trending partial discharge, it is possible to observe its development over time in order to assist asset managers with strategic decisions regarding the repair or replacement of the cable—prioritizing capital and MRO investments before an unexpected outage occurs.

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