You can use the ImportObj script from Max Smirnov
Find it here --> http://moi.maxsm.net/

the page is this http://moi.maxsm.net/startpos/8
But there are many ways also with FreeCAD can import and generate from a mesh Curves of wires, with part workbench or with Mesh Remodel Workbench thet you can install via Add-on manger available on menu

There is also a converter here:
http://moi3d.com/resources#Obj23dmWireframe_converter

- Michael

when you use the ImportObj script from Max Smirnov
as soon as the object is loaded, "escape" for skip the subdivision!

Thanks all! I tried the Smirnov script, but it does not seem to handle large files well. I will try the others now.

cheers
wim

Anyone supports big files!
150 000 polys is a reasonable maximum :)