Hi,

https://www.openstreetmap.org/node/12965169313/

This feature is an indoor transformer. You can tell by: the style of the door, the triangular yellow warning signs and the stencilled name / reference number. Typically the reference number is in the format of '999999a', where 9 can be any number and 'a' can be the letters a, b, x or y, with x and y being most common. The name will be the original name given to the installation, so it might be out-of-date, spelled incorrectly or otherwise not-quite-right (this is Ireland after all).