IMCORP Blog

Category Archives: Cable

PD Activity Identified During Assessment of Aged Utility Cable

By: IMCORP

Posted in: Utility, Cable

During the reliability assessment of aged underground residential distribution (URD) cable systems at a mid-western electric utility, one particular cable sample was found to exhibit low levels partial discharge (PD) activity. These PD sites were e... Read Article


Very Low Partial Discharge Values Found While Commissioning A New Wind Farm

By: IMCORP

Posted in: Workmanship, Wind, Utility, Renewable, Cable

During a recent wind farm commissioning project in the southern United States multiple defects were identified within the collector cable system. One particular cable exhibited defects in the form of very low levels of partial discharge at two time... Read Article


Embedded Semicon in Insulation during Cutback at a Wind Farm

By: IMCORP

Posted in: Workmanship, Wind, Generation, Cable

The cable displayed here was compromised as a result of the misuse of an insulation-stripping tool when being installed at a wind farm. At the insulation cutback, the contractor had inadvertently cut too deep, resulting in a small slice of semi-c... Read Article


Power Cable Damage From Backfill

By: IMCORP

Posted in: Wind, Generation, Cable, Backfill

These images show a PD site in a medium voltage power cable, part of a collector system designed and installed at a wind farm in Idaho during 2005.  In the first few years of operation, the site experienced a very high collector syst... Read Article


Power Cable Insulation Damage (Sabotage) at a Wind Farm

By: IMCORP

Posted in: Workmanship, Generation, Cable

The discovery of this medium voltage power cable defect at a site in Canada provided an opportunity to demonstrate the effectiveness of IMCORP’s cable diagnostics. On a cable of over 1400 feet, IMCORP was able to locate the defect within si... Read Article


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