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Shields Scotty Inquiry What impacts do rejuvenation fluids have on the conductor and insulation shields? Response With Star Trek Into Darkness in the theaters it was appropriate to revisit the question of shields. Not the shields that deflect Klingon disrupter blasts, but the conductor and insulation shields used to smooth electrical stress in underground power…Details
LIPA Q: I have read a paper from the conference record of the 2008 IEEE International Symposium on Electrical Insulation (ISEI) by some folks at Powertech Labs from my home province of British Columbia. The paper was titled: “Condition Assessment of 15 kV Rejuvenated Underground XLPE Cables.” The cables in question are operated with AC,…Details
Suitable for Treatment Q: We’ve taken some photographs of cable samples identified with off-line PD testing. I was hoping to get your opinion of the cable and if injection would be able to address these issues. On two samples, we found the XLP insulation was a greenish color. We’ve never found cables discolored before and…Details
Failure Causes III In my January 24th post, “Failure Causes I,” I provided a partial answer to an inquiry seeking to understand if rejuvenation technology was appropriate for the “many types of aging factors” from which his firm’s circuits might suffer. We learned that 39% or more of all circuit failures are component failures and…Details
Failure Causes I Q: I wonder if you have any information I could use to help address a concern I have heard in my company. That concern is that a 30 to 40 year old cable may have accumulated degradation due to many types of aging factors. Cable injection may not substantially address these factors…Details
EPR (Part 3 of 3) Over the course of the last two days I delivered two posts. In the first, titled “EPR (Part 1 of 3),” I provided a response to the inquiry on whether it made sense to rejuvenate aging EPR cables. The short answer was yes and I dispelled some EPR myths along…Details