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Questions tagged [ups]

uninterruptible power supply

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attached batteries and associated electronic circuitry for low power users, and or by means of diesel generators and flywheels for high power users. The on-battery runtime of most uninterruptible power sources is relatively short—5–15 minutes being typical for smaller units—but sufficient to allow time to bring an auxiliary power source on line, or to properly shut down the protected equipment.

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Source: wikipedia

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Order of connections between UPSs and PDUs

Half of the equipment on my server cabinet (data servers, networking) are critical and need to be backed up by UPS's, while the other half of it is non-critical (high-load simulations that only take 3-5 minutes per job and can accept downtime). My…
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What is the interruption time of an offline UPS system?

I am trying to figure out what the maximal interruption for an offline/standby uninterruptible power supply (UPS) would be. According to wikipedia: "The switchover time can be as long as 25 milliseconds depending on the amount of time it takes the…
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UPS unable to power the 1U server

1U rack server: http://ark.intel.com/products/67786/Intel-Server-System-R1304GL4DS9 Power backup: http://www.apc.com/products/resource/include/techspec_index.cfm?base_sku=BR1000G-IN When I try starting the server only on backup power then the whole…
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Hyper-V Core with Basic UPS options

Good morning, running Dell T610 server with Hyper-V Core, just a few VMs, hardware Firewall & Router. My old Belkin UPS failed today so I need to replace asap at cheap cost where possible probably meaning UPS without shutdown software. I have read…
gary
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Backup Power System for a Small Office: UPS, ATS, Generator etc

I'm trying to put together a backup power system for our office and I need some guidance. We frequently lose power for several hours at a time. I'm looking for a solution which would: Control power quality going into our devices (e.g. surges,…
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HP ProLiant ML350 G6 powerup issue

My setup: HP ProLiant ML350 G6 (2x PSU/redundant) I present my issue in a few steps: Power cables disconnected (no power coming to server) Re-connect cables Press "Power button" -> I can see green lights, I can hear fans spinning (it's actually…
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Why does an UPS switch to battery so frequently when the voltage is ok?

We've just bought an APC Smart-UPS X 150VA and were surprised with how frequently (many times per hour) does it switch to battery just to switch back to line in about a second. The light doesn't blink, nobody is arc-welding around, there are no…
Ivan
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Anti surge protection

Great site - my first posting! I support a number of small business for all things computing. I protect the servers with APC Smart-UPS 1000. The do just what they were bought to do. However, I dont protect any of the workstations. Recently we had a…
Grimbo
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UPS monitoring software for Linux, FreeBSD and Solaris

Looking to configure auto shutdown for my servers once the UPS battery reaches a certain state. We have MGE / EATON Pulsar M3000 UPS units, and a heap of servers running Ubuntu, FreeBSD and Solaris - oh and windows. I am all very new to this, so I'm…
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Testing UPS output for 'clean' power

Is there any way to test the 'cleanliness' of the power your are getting at your PC from the UPS and also from the wall? I have a powerful workstation (Dell T7400) that is now on its 3rd PSU in 30 months (all under warranty thankfully), but 3PSU's…
EJB
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Testing power consumption

I'm buying an UPS for the new server. As always, money is short, so I need to buy one which is sufficient, but not needlessly overpowered. The server has a 900 W power supply, but the retailer says he doubts it would ever draw over 300 watts. I went…
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Windows server 2008 UPS support

I'm looking to set-up a UPS on a Windows Small Business Berver 2k8 and I've noticed that there are some large price differences for similar capacity in-line UPSs. The most important point for me in UPS selection is that the server should have the…
Rory McCune
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How to make two UPS redundant?

How to setup UPS for redundant power supply if 1st UPS goes down then system should work on 2nd UPS if 2nd goes down then system should work with 1st UPS like server power supply.
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Mobile broadband Server backup

We have a windows server. It is attached to a UPS. The internet connection is not plugged into the UPS. If the power goes down in the building the UPS kicks in and emails out saying that the UPS is working. There is no internet connection as the…
Lisa
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Buying a Refurbished UPS?

I have a 10 year old APC Smart-UPS XL with battery pack, and need new batteries. Looks like I'll be spending $500-700 in batteries. While shopping around, I noticed a few places selling refurbished UPSes with brand new batteries for pretty good…
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