On-Line UPS System ( UPS )
Online UPS systems provide uninterrupted power to critical loads that require the highest level of protection.
They are commonly used in
The required level of protection is achieved through double conversion. Double conversion means – power is converted twice : The AC input converted into DC power. This section is called as rectifier, and provide power to Inverter. The Inverter inverts DC power in to AC power, it ensures voltage and frequency to be at constant level. The battery bank connected between rectifier and inverter section. In case of grid / Input AC power fails, then Battery bank provides back-up power to Inverter. This entire scheme called as double conversion.