Hi, Please, take a look: https://www.youtube.com/watch?v=NKnE61aaS9U Are these 230 kV or 345 kV lines? Without much thinking, evaluating phase clearances and counting number of porcelain bells insulators in strings I would say it is 345 kV. However, there are two things that puzzle me. One power line has just one conductor per phase (no bundle), and 330 kV levels and above are bundle conductors on regular basis.However,I don't live in the states. Anybody from Pensylvannia?
"Compactifaction" of power lines is a modern trend almost everywhere today. Note however that wooden poles in the yt video are very old fashioned style. Something like that you will not find in EU, especially not above 200 kV level!
Ok, if this isn't some monkey business but proper engineering design, this has to be 230 kV. Althought I've never seen a 220 kV pylon with as many as 18 standard disc units in a suspension string in EU (I think 16 being the most), that number can vary on several things (altitude, predicted contamination/polution level etc). OTOH, I heard there are still operating 345 kV lines with single conductor per phase somewhere in the states. And these are rare. In such cases used ACSR conductors are massive (dia> 1.7"). More importantly, corona suppression rings are put on ends of insulators with no exception.