Advantages of a Transformer-Based UPS System
However, transformerless UPS are better suited for large energy efficient applications where the tolerance for downtime is acceptable under certain circumstances and where there is a transformer installed somewhere else in the electric path.
This literature has made it sound like transformer-based technology in UPSs is obsolete and should be avoided.
Nonetheless, there are still critical applications requiring a nine nines rate which in turn need a transformer-based UPS.
For that reason, we are listing the advantages of transformer-based UPS.