This at the time was the dominant kind of UPS and is restricted to within the 150 kVA variety. These models remain generally applied in certain industrial configurations (oil and gas, petrochemical, chemical, utility, and large field markets) due to the strong mother nature with the UPS. From Java eleven https://hatyaibangkok82470.bloguetechno.com/uninterruptible-power-supply-system-an-overview-68904726