Talk:High-voltage cable

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subject:High vollage cables

may I know minium how much time &temperature taken for xlpe cross linking?

1.over machine(continuous curing vulcanization line)heating tube dia-200mm. 2.heating zone length-76m how much time taken for 1m 300sq mm(al) 11kv(insu thick 3.14to3.6) making?

This is really a question for the reference desk. You are not likely to get authoritative answers here, and you'd be better off talking to a high voltage cable manufacturer's representative. --Wtshymanski (talk) 21:58, 19 November 2009 (UTC)[reply]

nova_ryan 17jul2020: Is this still a question you want answers to? I am on IEEE PES and I have a lot of contacts in the industry. I can get you some responses on that. Are there other questions you have? I have circled back to a major MV/HV cable manufacturer in the USA. They have told me that the amount of time and temperature required to fully crosslink the cable really depends on the cable parameters and the blending of the insulation itself. This is highly variable. It will not be the same across all sizes, types, or even brands of cable. I was told that there isn't an easy answer and there is no standard or guide document on how to do it. Each manufacturer is deciding what is best based off of testing the final product. Sorry that isn't more helpful. I do know you could follow up with the companies that supply the base polymers themselves and get an approximate answer. Companies like Exxon Mobile and Borealis.

Take for example if you search for this compound: Borealis Supersmooth™ LE0592S Polyethylene. You will very easily find some contact information and they probably have more info. 173.79.225.63 (talk) 02:36, 5 August 2020 (UTC)[reply]

Semiconducting layers on insulation in high voltage AC cables

In AC power cable it mentions the Semiconducting layers but doesn't say what they are made of ? Are they really semiconductors ? - Rod57 (talk) 21:28, 24 February 2017 (UTC)[reply]

nova_ryan 17jul2020: Hello. So the semiconducting materials are the same base composition as the insulating layers but they will have what are known as "blacks" mixed in them. "Blacks" are basically a really pure form of carbon. They are derived from acetylene or another hydrocarbon. And FYI sorry if that term sounds off key that's just what the old heads referred to them as.

Ok for example if you are making EPR cable you would take the same exact EPR base and then mix the carbon into it with your Bunbury batch process. The layers would be extruded in tandem. Release agent would be added between the layers if you wanted a strippable semicon.

In summary the semiconductors is not the same thing you would think of as in the computer industry. They are just relatively low K versions of the insulator.