Dielectric IV

Dielectric IV In Dielectric I, I provided the first part of a four-part answer to a query—the summary question: To what extent does the introduction of injection equipment into energized devices impact the safe operation of medium-voltage circuits? We learned that there are great differences in the extent of this risk depending upon the injection…

Dielectric III

Dielectric III In Dielectric I, I provided the first part of a four-part answer to eight questions. The eight questions can be summarized: To what extent does the introduction of injection equipment into energized devices impact the safe operation of medium voltage circuits? We learned in the first installment that there are great differences in…

Dielectric II

Dielectric II In Dielectric I, I provided the first part of a four-part answer to a query—the summary question: To what extent does the introduction of injection equipment into energized devices impact the safe operation of medium-voltage circuits? We learned that there are great differences in the extent of this risk depending upon the injection…

Dielectric I

Dielectric I Q: I am working on my comments/concerns for the Safety Section for the C30 Draft Guide [Editors note: C30 is a group within the IEEE/PES/ICC working towards the writing of a “Draft Guide for Rehabilitation and Rejuvenation of Extruded Dielectric Cable Rated 2.5kV through 46kV.” While that Draft is being crafted, interested readers…

LIPA

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,…

Failure Causes I

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…