Tension - bare / insulated lines - comparison of maximum tensions

I compare the maximum cable tension (in daN) for LV overhead lines with bare AL cables, with lines with AsXSn type insulated cables.

According to data from the PTPiREE album "Album of low voltage overhead lines with bare AL 25-95mm2 cables on spun poles"
for the line 4xAL 50mm2 and the maximum span length is 50m, the maximum cable tension is 990 daN .

However, according to the album ELprojekt / STRUNOBET "Album of overhead low voltage lines with self-supporting insulated cables with a cross-section of 25-120 mm2 on spun poles"
for the line AsXSn 4x50mm2 and the maximum span length of 50m, the Fn tension is 411 daN


What is the difference? and this in addition in this direction - i.e. less tension for the AsXSn cable, which has a much greater weight?
Is it just a matter of time when albums were released 1998 for bare lines and 2011 for isolated? ... and the larger supply then taken up?


The thing is that, according to these data, the end pole of the double-nN line for cables:
- 2 x 4xAL50mm2 - must withstand a minimum of 20kN
- 2 x AsXSn 4x50mm2 - minimum 10kN

Does that make sense?

Makes sense .
Bare wires cannot "fly" (large overhang) in the wind and clump together, while AsXsN can "hang" loosely.

max overhang for the AL line - 0.91m
for AsXSn - 1.57m

and because of this, more than twice as much force acts on a bare pole?

Exactly.