Cool,apparently in Europe it is still very common for 15-20kV feeders to use greenish glass insulators, much more beautiful than those horrible polymeric ones. I have a greenish tempered glass double string, from 1974 made by ViFosa "AKA: Vidrarias Figueiras Oliveiras S/A" here in Brazil. I managed to obtain it when they were changing the poles, wires and crosses of a 13,800 volt trunk feeder. I got it in January last year, it's a beautiful collection piece for anyone who is an electrical enthusiast like me. They were tied with very old Oxlip 4/0 AWG wire.

Tughening is the surface only You can't drill any hole

I would guess the glass fragments are still large enough to anchor both sides of the metal "cups" the glass seem to have a stepped shape so maybe the same tensile forces make the glass fragments "roll" and get stuck.

yea, they are really beatiful, wowowo

Hey variac maniac thankes for subscribing to my channel and I am planning to get a insulator tomorrow it's near a gas station

Looks like a power station, doesn't look that odd

Agreed about it being monster, I've never seen so many strings supporting a single cable.

@YAKUMO RAN Yes a river crossing would make sense, I have seen similar arrangements now I think about it.

Hola, escriba su email, por favor y le enviaremos información detallada.

This may vary based on country.

@@isettech Under my state authority, the test is 1.2/50 *megaseconds*

It's experimental 1150 kV line now operating on 500 kV