Possibly was an ungrounded delta in the past , and was upgraded to a wye with stuff now connected line to neutral? I hear that's a common trick that has been used when they need to upgrade a line's capacity.I wonder if it was done for possible future use as a line, or was in the past?
Maybe when someone saw the two CN cables it confused them and they thought they should each get a cut out?
It was done last year, and is the last parcel on the road, so no place to expand.I wonder if it was done for possible future use as a line, or was in the past?
If it was three phase, yeah, but being single phase, with only one hot, and one neutral, opening the neutral would be the same as opening the hot. Still very strange. As others have said, maybe a floating neutral of a wye system, but as you said, why?
Ignoring any surges that could happen opening up the neutral, there is a risk to the lineman if they mistakenly opened up the neutral cutout thinking they were on the hot primary side. The other side of the switch would no longer be at ground potential, but rather be at 21kv. There may be some reason they did it, but for the life of me, I can't see any benefit and only potential downside. People make mistakes. I've heard stories where workers, during maintenance, have mistakenly attached protective grounds to the wrong side of switch and didn't survive. Just driving around, I've only seen cutouts on the primary side, so could believe workers won't expect a second cutout. And, the cutout on the neutral is closer to the road and more prominent.