To help us in understanding this I will discuss cable components and the function of each of these components. Accessories include terminations and joints, also called splices. Some of the advantages of this plastic are:. If the burning or arcing becomes extensive, the cable can fail from the outside in, as seen in Figure Since modern cables can be produced with super-clean insulation and semicons, and very few defects, one might conclude that the root cause of these types of failures occurring in newly purchased cables is poor specifications or acceptance testing. Semicon resistivity often increases with temperature, especially in older cables. Our engineering allows us to develop new, and improve existing cables.
Root Cause Failure Analysis Root cause failure analysis is the process of examining a failed sample, along with the operating and environmental information, to determine the fundamental cause of the failure.
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Under water as a submarine cable In special situations as mine trailing cables, crane cable etc. A similar electrolytic action may also have been caused by installing bare-sheath MICC cables on new oak. The amount of evidence that can be gathered will depend on the condition of the sample, what has happened to the sample since the failure, and the availability of information about the failure and previous conditions that the cable or accessory has undergone. What I hope to cover are some of the things to look for and some of the tests that may be used in a failure analysis. XLPE cable with a forest of water trees Another type of failure is evidenced by signs of burning or arcing on the surface of the semicon.