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Have you had a firsthand look at the devastating effects of electrical spikes on computer equipment? Are you confident that the devices you have in place will be able to protect your systems?
I found the topic interesting, indeed I was fascinated to research the difference between volt-amperes and watts, even though that wasn?t specified and no mention of the effect of the power factor (PF) was made.
Then I ran into section 3.
?Computers and related peripherals are typically designed to receive 120 volts of AC power at 60 Hertz. The actual electricity a wall outlet provides, however, can vary significantly from that baseline.?
I certainly does vary, A LOT.
Here in the UK, the mains supply is a nominal 240V at 50 Hz.
My problem here?
That omission and the na?ve assumption that everyone has a universal power supply rating, knocked me dead. I immediately began to question all the other points made, in what was an otherwise splendid article.
Please bear in mind, that in these days of the World Wide Web, and the global nature of the internet, the audience isn?t necessarily of the ?home grown? variety.
Then again, I understand that it is common in the US for power utilities to vary the supply available according to the demand, resulting in far more than what is described as varying ?significantly from that baseline?. The word ?significantly? should be replaced by a much stronger word, may I suggest ?drastically??
Many more comments could be made, e.g. what of those who use generators? and what effect is adding item A going to have compared to adding items B,C or D?.
A pity, it looked such a good article, at first glance.
Then I ran into section 3.
?Computers and related peripherals are typically designed to receive 120 volts of AC power at 60 Hertz. The actual electricity a wall outlet provides, however, can vary significantly from that baseline.?
I certainly does vary, A LOT.
Here in the UK, the mains supply is a nominal 240V at 50 Hz.
My problem here?
That omission and the na?ve assumption that everyone has a universal power supply rating, knocked me dead. I immediately began to question all the other points made, in what was an otherwise splendid article.
Please bear in mind, that in these days of the World Wide Web, and the global nature of the internet, the audience isn?t necessarily of the ?home grown? variety.
Then again, I understand that it is common in the US for power utilities to vary the supply available according to the demand, resulting in far more than what is described as varying ?significantly from that baseline?. The word ?significantly? should be replaced by a much stronger word, may I suggest ?drastically??
Many more comments could be made, e.g. what of those who use generators? and what effect is adding item A going to have compared to adding items B,C or D?.
A pity, it looked such a good article, at first glance.
May I suggest that you include the type of UPS output. The some of cheaper off-line units display a distinctly non-sinusoidal waveform with large harmonic distortions. These cause localised heating in the computer's PSU.
Also if used with items such as CRTs you must take into account the large in-rush currents which can overload the UPS causing it to shut down.
Blue Skies
Pat Carpenter
Also if used with items such as CRTs you must take into account the large in-rush currents which can overload the UPS causing it to shut down.
Blue Skies
Pat Carpenter
Has anyone ever successfully collected from a manufacturer of a UPS or surge Suppressor? I have never had occasion to try but would like to hear from anyone who has tried/got it/failed...
Very useful information. And for the uninterruptible power supply buying information, maybe you can refer by http://www.ups-power.net/News/7.htm
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