This once was the dominant form of UPS and is also limited to throughout the one hundred fifty kVA vary. These models are still primarily used in some industrial configurations (oil and gasoline, petrochemical, chemical, utility, and weighty industry marketplaces) a result of the robust mother nature in the UPS. https://condonearme82692.alltdesign.com/uninterruptible-power-supply-calculator-can-be-fun-for-anyone-53020357