An Uninterruptible Power Supply is a device that sits between a power supply (e.g. a wall outlet) and a device (e.g. a computer) to prevent undesired features of the power source (outages, sags, surges, bad harmonics, etc.) from affecting the performance of the device.
(UPS) play two important roles in power protection:
1) Providing a source of standby power in the event of a mains failure.
2) conditioning mains electricity to remove power problems such as sags, surges, brownouts and fluctuations that can damage equipment, cause computers to fail or crash and lead to data loss or corruption.
A UPS generally protects a computer against four different power problems:
Voltage surges and spikes - Times when the voltage on the line is greater than it should be Voltage sags - Times when the voltage on the line is less than it should be Total power failure - Times when a line goes down or a fuse blows somewhere on the grid or in the building Frequency differences - Times when the power is oscillating at something other than 60 Hertz
Different types of UPS
There are three conventional types of uninterruptible power supply:
- Online
- Line Interactive
- Offline
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