Common Power Problems
The primary role of any UPS is to provide short-term power when the input power source fails. However, most UPS units are also capable in varying degrees of correcting common utility power problems:
- Voltage spike or sustained Overvoltage
- Momentary or sustained reduction in input voltage.
- Noise, defined as a high frequency transient or oscillation, usually injected into the line by nearby equipment.
- Instability of the mains frequency.
- Harmonic distortion: defined as a departure from the ideal sinusoidal waveform expected on the line.
UPS units are divided into categories based on which of the above problems they address, and some manufacturers categorize their products in accordance with the number of power-related problems they address.
Read more about this topic: Uninterruptible Power Supply
Famous quotes containing the words common, power and/or problems:
“There is something antique, even, in his style of treating his subject, reminding us that Heroes and Demi-gods, Fates and Furies, still exist; the common man is nothing to him, but after death the hero is apotheosized and has a place in heaven, as in the religion of the Greeks.”
—Henry David Thoreau (1817–1862)
“The personal touch between the people and the man to whom they temporarily delegated power of course conduces to a better understanding between them. Moreover, I ought not to omit to mention as a useful result of my journeying that I am to visit a great many expositions and fairs, and that the curiosity to see the President will certainly increase the box receipts and tend to rescue many commendable enterprises from financial disaster.”
—William Howard Taft (1857–1930)
“Sustained unemployment not only denies parents the opportunity to meet the food, clothing, and shelter needs of their children but also denies them the sense of adequacy, belonging, and worth which being able to do so provides. This increases the likelihood of family problems and decreases the chances of many children to be adequately prepared for school.”
—James P. Comer (20th century)