But I think: you said EPS is not a substitute for diesel generators.
I think the generator here is regarded as a backup power and set up, note: is a backup power, not emergency power.
The generator may have to work for a relatively long time when it is needed.
I have seen diesel generators at a civilian airport supplying power for three days in a row, and the power supply is also a dual power supply, except that the standby generators are two instead of one.
And EPS, even if it is a high-capacity, invertible, power supply time is about two hours, power supply power of four or five hundred KVA, can not be used as a normal power supply.
As for the power size, I think it may not only consider the operating room, but also consider the wards, functional departments, medical equipment normal operation, etc., and its selection of 1,000KVA, does not exclude the power to choose a little larger for insurance purposes, but the selection of such a large, surely there is a reason.
I am specialized in reactive power compensation and filtering, 156 1132 5905 Previously, I have done power distribution design and so on, in Changping District, what needs can be exchanged.