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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Starting servers after UPS shutdown when input power is restored

I have a rather simple UPS (Powerwalker VI series) that does not seem to have any sophisticated built-in configuration options. When the power is cut and servers detecting that event shut down after a while, servers stay powered off. What I need is…
LetMeSOThat4U
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Uninterruptable power supply with digital output designating mains/battery state

I want to have some equipment connected to a UPS to shut down gracefully when mains is cut. This equipment does not have capability to read serial or USB, so software solutions are out. What I'm looking for is a hardware solution: a digital output…
Sean
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UPS for HP ProLiant DL180 G6

I inherited HP ProLiant DL180 G6 model supposed TB used for some additional (non mission-critical) work and need to buy the UPS for it. I've read that PSUs for HP servers tolerate pretty much only the pure sinusoid-wave power supply (not the…
LetMeSOThat4U
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MacOS nut client install for synology network ups

I have an APC UPS connected to my synology nas and I am trying to get my mac (10.13) to connect to the 'network ups' of synology. So far I've been trying to follow this…
Kevin V
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UPS + Bypass for a Server with Dual Power Adapter

We have a 600W APC UPS and a Server with two power adapters (each 800W). Originally, both power adapters were connected to the UPS, and the UPS connected to the power grid. Unfortunately the room where our server is located has no air con. So on a…
kinnla
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GE Digital Energy UPS Monitor for Windows

I have a few GE Digital Energy Match Series UPS that beeps and shutdown seconds after startup and before output power is supplied. The batteries are at full capacity. So I searched a number of sites for configuration software in order to determine…
Derek
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nut ups master and slave across different networks

I have set up a NUT master and slave and they work great when on the same LAN. Does anyone know if it possible to set them up across different networks? I can't find any reference to this anywhere when searching online and no one has been able to…
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Can you exceed power rating on a UPS with additional battery packs

After reporting the wattage of a remote site that doesn't have a UPS to my boss he cc'd me on the quote for what he was going to order. The site's networking and server equipment are using over 2,000 watts. But he spec'd out a 1500v UPS with…
Zombian
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MGE UPS Switched PDU

I have an old MGE Switched PDU unit. The one described in this manual: http://www.manualslib.com/manual/102923/Mge-Ups-Systems-Switched-Pdu.html I didn't use it in years and couldn't remember the admin password of the unit. I reset it to factory…
Michal T
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How to avoid overloading UPS on startup

I have a Dell Poweredge server and Netgear 48-port Gigabit switch, all attached to a CyberPower 1500 VA 900W UPS. We occasionally get power outages here, and when we do, the systems shut down gracefully, but when the power comes back on, the UPS…
Eddie Parker
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Using UPS with USB driver on Hyper-V Core

My setup: HP ML350 G6 HP R/T2200 UPS that has a USB connection Microsoft Hyper-V Server 2008 R2 (bare metal hypervisor) SBS2008 running in a VM Windows Server 2008 R2 running in a VM Other VMs for development work I want to manage the UPS using HP…
GTslot
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UPS requirements for server

I have a DL380 Gen9 server, and I would like to get a UPS for it so that when power outage happens, the server will be up at least for a minute. The server has two PSU, each 500W. I actually got a UPS (1500VA, power factor 0.6), but it could not…
Sam
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Nut says APC UPS is on battery. It is not

Since 2 days my Smart-UPS 1500 RM reports it is on battery but this is clearly not the case since it's been running for more than two days indicating 100% battery with 01:30:00 running time. Batteries were replaced a couple of months ago. I do not…
divB
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Should each 48U have their own UPS?

Yesterday, the network of Linode over at HE.net has suffered a major outage -- supposedly, he.net has had "one out of eight" of their power generators fail, which, apparently, has one way or another resulted in the whole Linode Fremont cloud going…
cnst
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"Turbo-timer" for safely shutting down after powerout

We have clients that apparently routinely kill the power to our running windows 7 platform without performing a shutdown. We have had a couple of (SSD) drive failures that we suspect are caused by this behaviour. Assuming education is impossible,…