Repeated Field Tests – Utility Case Studies of the Value of Trending
نویسنده
چکیده
Cable System Management requires an assessment of the health of the cable systems. It is increasingly common for the assessment of aged cable systems to be made through the application of diagnostics measurements. Papers and standards have established benchmarks for diagnostic measurements that help utility engineers to reach a condition assessment. Generally, extremes of healthy and non-healthy cable systems are easily identified independent of the diagnostic technique. However, there is less certainty in the assessment when cable systems lie between the extremes. In such cases, repeat tests and their trending may prove useful in enhancing the condition assessment. Amongst the commercially available diagnostic techniques, VLF Tan δ is the most commonly deployed on cable systems in North America. Therefore, the focus of this paper is the application of repeated field measurements using VLF Tan δ on multiple utility cable systems.
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