Hospitals because of the special nature of their work, medical buildings have therefore become relatively complex function, structure of civil buildings. Hospital power supply and distribution methods and other civil buildings are quite different, especially in the special environment of the hospital, leakage of current to the patient poses a potential danger, so the electrical safety design has put forward special and strict requirements. Especially those life-critical places, such as surgical operating rooms, intensive care units and other places are required to install medical IT power supply system (IT refers to the ungrounded power supply system, this system is commonly known as the medical isolated power supply), its purpose is to ensure that the medical appliances in the premises to provide a safe and reliable power supply to ensure the safety of patients.
There are other aspects: but secondary.
For example:
Filtering anti-interference function, can remove the third harmonic and other interference
Three-phase isolation power supply can produce a new neutral line, to avoid due to the grid neutral line is bad caused by the equipment operation is not normal.
Current waveform distortion caused by non-linear loads can be isolated without polluting the grid.
Prevent the current distortion of non-linear loads from affecting the normal operation of AC power supply and polluting the power grid, and play a role in purifying the power grid.
Sampling at the input of the isolation transformer, so that the distortion of the nonlinear load current does not affect the accuracy of sampling, to get the control signal that can reflect the actual situation.
Monitoring of single-phase or three-phase power supply network insulation resistance, electrical load and equipment status.
Multiple installation modes for easy matching with other devices
Highly reliable AI protection wall technology
Rich interfaces and communication modes
Easy installation and small space occupation
Seeing your follow up question. This depends on your ups situation. I didn't see your situation, I can only answer approximately, hope it helps you.
The main input of a large UPS is generally three-phase, three-phase, no neutral input, and the UPS itself has an output transformer to isolate the main power supply from the load; while the bypass input is three-phase, four-wire, with a neutral input. This neutral line is usually only after the UPS is directly output, without any isolation. If electrical isolation of the UPS is required, or if it is required that the grounding systems upstream and downstream of the UPS are not the same, an isolation transformer needs to be added to the bypass. The latest technology is that the isolation transformer inside the UPS is no longer used, the rectifier uses IGBT rectification, this is if you need to isolate the UPS, you need to add an isolation transformer in the main and bypass or at the output of the UPS.