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UPS Knowledge

• What Is a Battery Backup with Surge Protector?

  9/29/2010

  A battery backup with surge protector is an electronic gadget that acts as a buffer to protect a computer and its files should there be a power failure or power surge. It has two primary functions. The first is to protect high tech equipment from power fluctuations. This includes power spikes, such ...

• How are the "sizes" of UPSes determined?

  8/4/2010

  Typically, a UPS has a VA rating. The VA rating is the maximum number of Volts * Amps it can deliver. The VA rating is not the same as the power drain (in Watts) of the equipment. (This would be true if the load were only resistive or the circuit were DC, not AC). Computers are notoriously non-resis...

• How important is the UPS output waveform?

  3/8/2010

  That's a good question, and one is worthy of some debate. One school of thought holds that one should always run equipment on the best approximation of sinusoidal input that one can, and that deviations produce harmonics which may either be interpreted as signal if they get through a power supply, o...

• Does the UPS have a manual bypass switch? If the UPS is broken or is being serviced, can you pass power through it to your equipment?

  1/25/2010

  The last thing you want is for a broken UPS to be the cause of extra downtime. The more information about a UPSes operation you can get from watching the unit itself, the better. How much power (or percentage load) the equipment is drawing, how much battery life is left and indications of the input...

• How long can equipment on a UPS keep running after the power goes?

  1/18/2010

  That depends on how big a UPS ( uninterrupted power supply) do you have and what kind of equipment it protects. For most typical computer workstations, one might have a UPS that was rated to keep the machine alive through a 15 minute power loss. If it is important for a machine to survive hours with...