The smallest that I know of was a box the was fixed to a (telegraph) pole to supply power.
How that worked I haven’t a clue, maybe they were small transformers to reduce the voltage from a high level to household 220 V. Never thought to check it out.
I think that the majority of their products would not be seem by the general public as inside power stations and electrical sub stations.
The video shows their larger products. They did link up with Parsons who made turbines that powered the generators. All the output from those generators would be passed through Reyrolle control systems to the main grid and then down to householders.
The other company doing the same thing was GEC.
Allan C.
