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qli029
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Join Date: May 2011
Posts: 9

Manufacture 2-Core MV Cable

08/03/2011 7:39 PM

It is so hard to find any 2-core MV cable, such as 11kV or above.

For two phase MV system, people choose single cores only. I can think of two reasons here: first, 2-core MV cable is so rare so it could cost more. Second, it uses much more fillers to be circular, this can be the limitation for some manufacturers.

I just wonder, is there any other reason to not manufacture 2-core cables? Any electrical reason for it?
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Fredski
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Join Date: Feb 2011
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#1

Re: Manufacture 2-Core MV Cable

08/03/2011 9:51 PM

I only know of single phase or three phase.
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Tornado
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#2

Re: Manufacture 2-Core MV Cable

08/04/2011 12:54 AM

You could use 3-core cable, and just leave one core unconnected, or maybe used as ground.

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TonyS
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#3
In reply to #2

Re: Manufacture 2-Core MV Cable

08/04/2011 3:10 AM

I think this could cause problems with the stress relief arrangements at the termination.

As to why 2 core isn't generally available, it's a case of demand. If you approach a cable manufacturer I'm sure they would oblige for a price!

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cuba_pete
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Join Date: Dec 2010
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#4

Re: Manufacture 2-Core MV Cable

08/04/2011 12:28 PM

The epuipment necessary for dual core systems is not run of the mill. The requirements which are necessary for dual core two phase systems results in equipment not being manufactured on any appreciable scale.

The EMF resulting from a two-phase system would require additional clearance issues from single or three phase systems.
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