On Monday, July 13, 2020 at 11:44:40 PM UTC-4, Ralph Mowery wrote:
In article ,
says...

Dunno. Never saw the primary fuse open tho, maybe there isn't one. I
know there is a recloser on the primary somewhere that can open and
automatically reset but you usually only see that with a fault on the
primary, like a pole down.
I have seen plenty of transformers blow without taking out the
primary.
That is really not my area of expertise but next time I see my FPL guy
I will ask him.

If there is a fuse, it needs to be at the top where that disconnect
ring is.

http://gfretwell.com/electrical/transformer.jpg



The disconnect can either be just a disconnect or it can contain a fuse
that when blown will let the disconnect fall down so it can be seen from
the ground. I thought I remember seeing one of those that had fallen
down when a fuse blew, but it had been around 15 years ago.

https://en.wikipedia.org/wiki/Fuse_cutout


That's a good find. I've seen the disconnects on poles, never
knew about how the fuses worked, that they drop down to indicate
they are blown.