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Firas Atwan
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Join Date: Feb 2012
Posts: 6

Flat Formation or Trefoil Formation

02/05/2012 10:56 AM

For 132 kV Power Cable (1x630 sq mm), which laying method is better for the same installation condition, Flat formation or trefoil formation?
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SolarEagle
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Join Date: Mar 2007
Location: by the beach in Florida
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#1

Re: Flat formation OR Trefoil formation

02/05/2012 11:44 AM

Do your own homework kid...♣

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mohamed esawy
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Join Date: Feb 2012
Posts: 1
#2

Re: Flat formation OR Trefoil formation

02/05/2012 1:56 PM

the trofil arrangement is better than the flat due to reduce the magnetic field which create from passing the current through the cable
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PWSlack
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United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#3

Re: Flat Formation or Trefoil Formation

02/06/2012 9:25 AM

In order to lay cables in formation, 3x630sq mm will be required, especially for trefoil.

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Drafty-01
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Join Date: Oct 2011
Posts: 5
#4

Re: Flat Formation or Trefoil Formation

02/06/2012 3:30 PM

Holy cow! 132kV @ 630mm. If you're dealing with the kind of power that can be put through this size set-up, you should know what you're doing! Please find someone that knows what they're doing before someone gets killed!!!

Trefoil is definitely best, but each core of the cable would be shielded for earth leakage protection anyway - as it is for any HV cable. You will need three cores for TRI foil - that's just how it works.

My 0.02 worth.
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