The different type of UPS system
The different type of UPS system
The offline/standby UPS offers only the most basic features, providing surge protection and battery backup. The protected equipment is normally connected directly to incoming utility power. When the incoming voltage falls below or rises above a predetermined level the UPS turns on its internal DC-AC inverter circuitry, which is powered from an internal storage battery. The UPS then mechanically switches the connected equipment on to its DC-AC inverter output. The switch-over time can be as long as 25 milliseconds depending on the amount of time it takes the standby UPS to detect the lost utility voltage.
With line-interactive UPS, the system is powered with a conditioned current that eliminates any voltage fluctuations. As alternating current (AC) passes through the voltage regulator, any fluctuation in the power is corrected. Most line-interactive UPS systems feature a battery backup mode that activates when power failure is detected. The advantage of line-interactive UPS is high reliability and high efficiency through voltage conditioning. However, the available power capacity of this type of UPS might be limited.
3.Online double conversion UPS
If an electrical failure occurs, an Online UPS system maintains consistent current flow for the protection of network equipment. Upon fluctuation or failure, the rectifier within the UPS is automatically bypassed, and power is sourced from the battery until restoration occurs. The online UPS circuity is seamless.
