The OFFLINE UPS supplies (or routes) the incoming mains supply directly through to the output usually through a relay contact. Some high frequency noise filtering and surge suppression may be included in this path.The UPS switches on its inverter as soon as mains supply failure is detected or below the normal load and simultaneously switches the output relay to the inverter side to supply battery sourced power to the load. This transition involves a delay on account of the time to reliably detect mains failure and switch over a relay, and the output is broken for this period (usually for 2 to 12 msec).
OFF – LINE UPS are usually the least expensive as compared to the other two.
Line Interactive UPS
The true LINE INTERACTIVE design is in fact a combination of OFFLINE & ONLINE, in which the inverter plays a dual role of charging the battery when mains supply is present as well as regulating the output voltage and working as a normal inverter in absence of mains supply, so to the user it appears like an ONLINE System. Line Interactive UPS offers enhanced power protection over the basic Offline designs by providing additional line conditioning.
This type of UPS is able to tolerate continuous under voltage brownouts and over voltage surges without consuming the limited reserve battery power. It instead compensates by automatically selecting different power taps on the auto transformer.
We provide our clients with a wide range of offline UPS. Our product is reliable and easy to use. These Offline UPS have automatic voltage regulator. Further, the power from supply is regulated by AVR. In Offline UPS, Inverter output is connected to load only when normal AC power supply fails, means when AC power is available it is directly goes to output. It also has a CPU controlling stabilizing function.
- Less power consumption
- Energy efficient