Hello,
I wonder if there is a power:type tag adapter for towers which are not listed on the wiki page.
Power tower upside down (isolators are hanged to wires rather than wires being hanged by isolators) 
Power tower upside down superposed with normal (wires are hanged to an isolator, and a second isolator is hanged to this) 
(this one is close to my living place).
Images from openstreetcam.
Regards.