An uninterruptible power supply (UPS) system stores backup energy to supply continuous power to electronic devices such as computers, printers, and fax machines. It stores power in a specialized battery to maintain the power supply during power failure. It also keeps computers running for a few minutes after the power cutoff, giving users ample time to save their work and do a proper shutdown.
Types of UPS Systems
Kinds of UPS Systems include the following:
Standby Power System (SPS)
A Standby Power System (SPS) monitors the power line of electronic devices. Also called a line-interactive UPS, it switches to battery power as soon as it detects a problem with the mains or AC power. Power transfer often takes several milliseconds before starting.
On-line UPS system
An on-line UPS system constantly provides power to electronic devices directly from its own inverter. Unlike the SPS, it does not allow momentary power lapses. It continues to function even when the power line is running smoothly. It is generally more reliable but more expensive than the SPS.
Choosing UPS Systems (Buying tips)
Extended runtime: Choose a UPS system with an extended runtime to allow more time to power electronic devices during a power failure.
Rating: Look for a UPS system with high power and colt amp ratings that allow it to support a greater load.