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Validating and Quantifying Reliability Improvements of New Cable Designs-A Case Study of 600 V Self Sealing Cables

Manufacturers continue to make and utilities continue to deploy new cable designs to address important technical and reliability problems. These new solutions are tested in the laboratory through development and approval tests. Although the deployment begins only when all of these tests are completed to the satisfaction of all involved; there is still a need to verify that the solution really does address the problem and does not introduce other unforeseen issues. This need exists because there are some very important differences between laboratory tests and field experience; laboratory tests are designed to deliver consistency and repeatability, service experience increases the scale (generally by length of product) and exposes the solution to the ill-defined rigors of service. However, although absolutely essential, monitoring performance in service is a challenging undertaking.