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Results tagged with ups
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user 16993
A UPS is an Uninterruptible Power Supply that provides backup power when the main power source is lost. Questions on repairing commercial ones are generally off topic.
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Battery Size for a UPS
The second formula is good, keep in mind that cheaper UPS have a square wave output instead of a sine wave, some devices may be affected. … The radio might keep some noise from the UPS and the fan might not work well since these electric motors usually expect a sine as input. You are safe to try them anyway, no risk of frying anything. …
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7
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volt-ampere (VA) rating of UPS
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The apparent power is used only to choose output cable size, so it's not related to the UPS duration at all. … What you must seek for is the size of the batteries inside the UPS, that is measured in \$Ah\$, ampere time hours, dimensionally this number is a charge, coulomb. …
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What should I use as a test load to calibrate a UPS?
Heater or halogen lamps are a very good candidate. If you are worried about accuracy, you should find a way to measure the power they actually draw, if you have a multimeter it is not that hard since …
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