Thanks for your kindly reply, @ 7anoter4.
Yes, IEC 60364-5-52 table B 52-21 has the same content as ABB switchgear manual.
But the cable in the standard runs horizontally, not vertically. I guess cables fixed vertically will provide better heat dissipation.
However, the diameter of 240sq. mm...
Yes.
actually, cables are fixed by cleats as attached picture. the distance between two cable layers is 2 times the cable diameters.https://files.engineering.com/getfile.aspx?folder=507c65ec-243f-4f86-b82c-a61d5d746f71&file=actual_cable_installation.png
Thanks for your reply. I have one more question.
In our application, vertical cables are erected in 2 parallel ladders, where ladders are installed vertically next to each other a minimum distance between the ladders of about 2 times the cable diameter.
Is there any reduction factor for this...
hello,
In wind power generator, power cables are laid vertically along ladder from ground to nacelle of above 100 meters height. The cables are installed in method F according to IEC 60364-5-52(single-core cables with three loaded conductors in trefoil),The clearance between trefoil groups are...
