UPS
( Uninterrupted Power supply )
In a UPS, the energy is generally stored in flywheels, batteries, or super capacitors. When
compared to other immediate power supply system, UPS have the advantage of
immediate protection against the input power interruptions. It has very short
on-battery run time; however this time is enough to safely shut down the
connected apparatus (computers, telecommunication equipment etc) or to switch
on a standby power source. UPS can be used as a protective device for some
hardware which can cause serious damage or loss with a sudden power disruption.
Uninterruptible power source, Battery backup and Flywheel back up are the other
names often used for UPS. The available size of UPS units ranges from 200 VA
which is used for a solo computer to several large units up to 46 MVA.
When there is any
failure in main power source, the UPS will supply the power for a short time.
This is the prime role of UPS. In addition to that, it can also able to correct
some general power problems related to utility services in varying degrees. The
problems that can be corrected are voltage spike (Sustained over voltage), Noise, Quick reduction in
input voltage, Harmonic distortion and the instability of frequency in mains.
