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:
“The common experience is, that the man fits himself as well as he can to the customary details of that work or trade he falls into, and tends it as a dog turns a spit. Then he is part of the machine he moves; the man is lost.”
—Ralph Waldo Emerson (1803–1882)
“I talk democracy to these men and women. I tell them that they have the vote, and that theirs is the kingdom and the power and the glory. I say to them “You are supreme: exercise your power.” They say, “That’s right: tell us what to do;” and I tell them. I say “Exercise your vote intelligently by voting for me.” And they do. That’s democracy; and a splendid thing it is too for putting the right men in the right place.”
—George Bernard Shaw (1856–1950)
“While the onset of puberty can vary by as much as six years, every adolescent wants to be right on the 50-yard line, right in the middle of the field. One is always too tall, too short, too thin, too fat, too hairy, too clear-skinned, too early, too late. Understandably, problems of self-image are rampant.”
—Joan Lipsitz (20th century)