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Electrical Treeing and the Effect of Rejuvenation

Electrical Treeing and the Effect of Rejuvenation Q: According to a representative of an offline partial-discharge testing firm, injection can cause electrical trees and faults. The premise is that the water tree is superimposed over the electrical tree and thus grades the electrical stress around the electrical tree. By curing the water tree, the electrical…

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Diagnostic Testing – Should I do it?

Diagnostic Testing Q: Our engineering department is having a debate about testing our cables. I plan on testing my URD cables in advance of injection. I am hoping to use the test results to help me determine which cables need injection, to prioritize the work and keep costs to a minimum. I was told that…

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Soak Period

Soak Period Q: Also, what happens to the water that is in the cable once your fluid is injected? When your fluid meets the water does it chemically change into something? One more question please. Why is it that older injection methods leave soak bottles on for 60-90 days (and sometimes they forget to pick…

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Injectable Cable

Injectable Cable Q: With an additional 40 years of life added to each cable you inject, is it possible to run out of injectable cable? A: There are over two billion feet of pre-1985 vintage polymeric cables still in service in North America. Stranded cables with strand-block, whether direct buried or in duct, can be rejuvenated…

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Fan the Strands

Q: I have a question regarding a statement I heard one of your colleagues make at an ICC meeting recently. Would you comment on the criticality that wire brushing of the conductor has when installing a connector?

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Cable Rejuvenation Impact on Loss Factor (tan-Delta)

Cable Rejuvenation Impact on Loss Factor (Tan Delta) Q: We have treated a run of feeder cables that spans several miles, utilizing Cablecure® 733 rejuvenation fluid. The cables are 35-kV class XLPE and have 750-kcmil aluminum conductors. We have noticed a decrease in voltage drop since the cables were treated. How will rejuvenation affect the power…

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Of Splices and Prices

Of Splices and Prices Q: What is a “blow and go” injection method? Does blow and go make sense for me? A: First, the phrase, “blow and go” was coined by injection operating personnel about a dozen years ago shortly after a pricing paradigm called “Productivity Pricing” was introduced. Productivity pricing was benevolently conceived by my Novinium…

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