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Arthur Britto wrote: |
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> On Sun, 2008-05-11 at 10:15 -0700, maxim wexler wrote: |
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> |
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>> I did a search for UPS units and was overwhelmed by the diversity out there. |
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>> |
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>> What can the group recommend? |
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>> |
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>> I only need something that will give me about a minute's head start to safely turn of the box. |
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>> |
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> |
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> You likely want more than a minute. Most likely, you don't want your |
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> system to crash when coming back up when power fails soon after it is |
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> restored: your system could be in the middle of a fsck. Generally, you |
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> want enough capacity to: power off, power on, and then power off safely. |
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> |
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True, but I find the main purpose of my UPS is to keep the computer |
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running throughout a short power-outage. That's what happens 90% of the |
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time, the other 10% of the time, the power outage lasts longer than the |
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UPS and it shuts the computer down. |
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> I am very happy with the CyberPower Intelligent LCD Series: CP*AVRLCD |
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> http://www.cyberpowersystems.com/ |
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> |
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> The series has: |
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> |
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> NUT support: |
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> You want something that works with NUT. Instead of a vendor specific |
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> package. This way your acquired skills are portable and future proofed. |
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> Network UPS Tools |
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> http://eu1.networkupstools.org |
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> NUT is great. It safely powers off my system when the UPS is low. |
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> Additionally, I set it up to e-mail my cell phone when the power state |
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> changes. If I go out during a power outage, I can stay out longer if I |
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> know the power is not restored. |
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> |
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Didn't know that existed. It has really good UPS support too. Guess I |
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can buy something other than an APC. |
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> USB interface: |
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> * A USB port is more future proof: serial ports are becoming rare. |
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> * Allows monitoring UPS state. |
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> * Allows powering off the UPS. |
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> |
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> LCD Display: |
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> At a touch know: |
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> * power consumption (don't need to pull out a Kill-O-Watt) |
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> * battery charge |
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> * estimated minutes remaining |
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> |
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How much do you think this draws? Does it have any negative effect on |
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backup time? |
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> One thing to be wary of is like most inexpensive UPSes it does not |
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> provide a pure sine wave. This can damage a power supply that has |
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> active power factor correction. Luckily for my Silencer 750 Quad |
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> according to the manufacturer due to the short time in which the UPS is |
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> in use it is not an issue. |
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> |
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Could this be why my computer makes this horrific buzzing noise when on |
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the UPS? |
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|
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I have an APC XS800, the PSU is a Seasonic 330W with Active PFC. |
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> -Arthur |
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> |
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> |
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-Hal |
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-- |
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