Defect Blog

Monthly Archives: July 2012

Each year, millions of people and thousands of businesses are impacted by underground cable system failures. IMCORP is dedicated to advancing the understanding of how these failures occur and more importantly, how they can be avoided.

Jul 30 2012

Improper Semicon Cutback On A Cold Shrink Termination


The above image, taken at a nuclear power plant, shows a jagged semicon cutback on an open-air cold shrink termination. The cable owner first used Tangent Delta (TD) and Very Low Frequency (VLF) tests believing these were sufficient to assure r... Read Article

Jul 30 2012

Stone in Cable 176m (578ft) from Termination

By: Ben Lanz and Bill Corrente

Posted in: Backfill, Cable, Facility, Generation, Renewable, Solar, Utility, Wind, Workmanship

IMCORP’s  Factory Grade® assessment discovered a substandard  location while commissioning the cable systems at a generation facility. The client used IMCORP’s Location Matching service to pinpoint the defect location. N... Read Article

Jul 23 2012

PD Activity in a Y Joint at a Nuclear Facility


Posted in: Workmanship, Generation

IMCORP conducted its Factory Grade® assessment on a critical loop at a government nuclear facility in southeast USA. This particular PD occurred at a Y-joint located 185 ft. and had an inception voltage of Uo. PD a... Read Article