They look like they are at least 125KVA- I worked at a rental company (Sunbelt was a small rival here, then) and replaced the field winding that had been overloaded or shorted-my doing it was a test of my competence and I passed 😁 the 3 running at once is improbable, there has to be switching to allow alternate/all usage, so it can be more efficient.
They look like they are at least 125KVA- I worked at a rental company (Sunbelt was a small rival here, then) and replaced the field winding that had been overloaded or shorted-my doing it was a test of my competence and I passed 😁 the 3 running at once is improbable, there has to be switching to allow alternate/all usage, so it can be more efficient.