Monthly Archives: March 2012
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 ArticleIssues Performing Cutback on Out of Round Power Cable at a Wind Farm
By: IMCORP
Posted in: Workmanship, Wind, Generation
Featured here are medium voltage feeder cables at a wind farm substation in South Dakota. These cables are the site’s most critical link, handling the output of 10 to 20 turbines. IMCORP Factory Grade® technology found that ... Read ArticleImproper Heat Shrink Application on Power Cable at a Wind Farm
By: IMCORP
Posted in: Workmanship, Wind, Generation
These images show the development (from November 2008 to March 2009) of a medium voltage cable failure in an open-air termination at a wind farm in Minnesota. The first image shows non-compliant heat shrink at the termination that was located b... Read ArticlePower Cable Degassing
By: IMCORP
Posted in: Workmanship, Wind, Generation
These images show cross-sections of a medium voltage power cable that was installed at a wind farm in Wyoming. In this case, the IMCORP Factory Grade® technology indicated partial discharge activity on a section of cable. The PD l... Read ArticleDamage to Power Cable from a Neutral Wire Repair
By: IMCORP
Posted in: Workmanship, Wind
IMCORP's Factory Grade® technology assessment indicated a PD site in an underground medium voltage power cable at a wind farm in Texas. Initial inspection of the PD site did not show any evidence of an issue. IMCORP's confiden... Read ArticleWhittled Cutback on Power Cable at a Co-op Utility
By: IMCORP
Posted in: Workmanship, Wind
This image shows a 7.2 kV (medium voltage) power cable system at a co-op utility in rural Missouri that supplies power to a residential area. IMCORP's Factory Grade® technology assessment indicated PD activity at the sep... Read ArticlePower Cable Termination Cutback Issues at a Data Center
By: IMCORP
Posted in: Workmanship, Facility
Pictured here are live front terminations of a 7.2 kV (medium voltage) power cable system at a critical data center in Portland, OR. After termination failures began to occur, DC HiPot testing had been utilized but came back inconclusive. A... Read ArticlePower 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 ArticlePower Cable Termination Cutback Issues at a Wind Farm
By: IMCORP
Posted in: Wind, Generation
These pictures show two different live front substation terminal ends at a wind farm in Canada during the summer of 2006. The client believed that the medium voltage power cable termination ends at the substation were in fine working order. Also, e... Read ArticlePower 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 during the summer of 2006 provided an ... Read Article