single core cable in trefoil or side by side formation 1

[mashayekhi]

what are the problems,if single core cables are laid side by side position instead of trefoil,I need a clear refrence that calculate amount of eddy current that produce in side by side formation.

 

[Marmite]

Have a look at the attached document.
Regards
Marmite

 

[jghrist]

It is basically a balance between circulating shield currents and mutual cable heating. Trefoil configuration minimizes spacing which minimizes circulating currents but maximizes mutual heating.

 

[ScottyUK]

Trefoil also keeps core impedances evenly balanced, and minimises the external magnetic field.


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If we learn from our mistakes I'm getting a great education!

 

[cuky2000]

Although the trefoil cable configuration has some favorable score over the flat configuration, there are also a few drawbacks. See the enclosed figure for details.