This once was the dominant kind of UPS and it is restricted to within the a hundred and fifty kVA variety. These units remain primarily used in some industrial configurations (oil and fuel, petrochemical, chemical, utility, and heavy market marketplaces) mainly because of the strong character with the UPS. At https://wax49269.blogsmine.com/34283419/facts-about-uninterruptible-power-supply-cyberpower-revealed