Need to clarify what problems may arise from servers in the server room when a transformer station is at a distance of 10 meters. thanks.
I've done it...
No noticeable impact on my servers. I've had indoor transformer units nearby, as well as external. The worst was actually having a 480V transformer in my server room, two meters from the server rack. The worst issues there were heat and the inconvenient access for electrical repair/service.