Rather depends on how big the hospital is. In the UK at least at one extreme, on a large sprawling campus like a City general hospital there may be many buildings and transformers and an HV ring arrangement is common for a large site, with options to link out sections or to provide LV link feeds such that any one HV/LV transformer may be taken out of service with minimal disruption. Backup generation may also be CHP and may have option to backfeed up onto the HV ring.
Smaller sites "cottage hospital" will be fed at LV and have a simple backup generator, and depending what is performed there, that may only cover a limited set of facilities.
Within the buildings lights and power will be separated by zones, again to allow any one failure to have minimum effect. There are some very specific rules for supplies to areas that do surgery, where the normal levels of touch voltage would be unacceptably high, and a power cut could be very serious indeed.
Rather depends on how big the hospital is. In the UK at least at one extreme, on a large sprawling campus like a City general hospital there may be many buildings and transformers and an HV ring arrangement is common for a large site, with options to link out sections or to provide LV link feeds such that any one HV/LV transformer may be taken out of service with minimal disruption. Backup generation may also be CHP and may have option to backfeed up onto the HV ring.
Smaller sites "cottage hospital" will be fed at LV and have a simple backup generator, and depending what is performed there, that may only cover a limited set of facilities.
Within the buildings lights and power will be separated by zones, again to allow any one failure to have minimum effect. There are some very specific rules for supplies to areas that do surgery, where the normal levels of touch voltage would be unacceptably high, and a power cut could be very serious indeed.
