Holly Cross Substation Time-Lapse - Basingstoke

[@BsktImp]

What's the purpose of the 'wall'?

[@time-lapse]

No idea, sorry.

[@popcorny007]

Probably a regulatory requirement.
"Transformers must be X meters apart, or be separated by a concrete wall"

[@BsktImp]

Thanks guys. On first viewing I didn't see that the wall separated two transformers. I believe the walls are called isolation walls or blast barriers and serve at least 3 roles: projectile resistance, resonant noise reduction & fire containment.

[@cwmbc]

Acts as an insulator between transformers.