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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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Hyper-V Core Server 2019 ignoring power plan thresholds

I am attempting to tweak Hyper-V Core Server 2019 (host) power thresholds, however my attempts have failed so far. Scenario The newly created Hyper-V 2019 Server (part of Workgroup, not yet a Domain) has been attached to an external UPS. Battery…
Riccardo
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Redundant power solution in datacenter rack

We have two racks in a datacenter, currently powered by two independent sources. All devices are distributed across four different power extenders, and a few critical ones are first connected to a UPS and then to one of the power extenders. Our wish…
Jax
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Sun (NPR900R) Server Cabinet Input Power Range

The ISP I work for purchased a Sun NPR900R Server Cabinet. For usual operation, a UPS will provide the power supply. Is it possible to operate this at 120 V input range?
Natkeeran
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Is it impossible to accurately measure the health of a Lead-Acid UPS?

In a blog post from Schneider Electric (parent company of APC, the UPS manufacturer), they say that lead-acid UPS batteries "rely on chemistry that makes it hard to accurately predict when they’re going to fail". I haven't seen this documented…
Travis
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apcupsd commok event fires where there was no commfailure

I have an openSUSE Tumbleweed host connected by USB to an APC Back-UPS NS1080G. For the most part everything works fine and apcupsd keeps track of the status. But lately every few weeks it fires the commok event without having fired the…
ShadSterling
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Socomec UPS no longer powers on after power failure

Some time ago I was bought a Socomec NETYS PR RT 1700 and a B2200 extender as payment for a job, intending to use it for a project that fell through sometime later. I started at a new job as IT Manager and, as cash for IT was scarce at the time,…
Aaron Mason
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Electricity outage killed 4 out of 6 UPS

We recently had an electricity outage of 1-2 seconds at one of our buildings. In this building we have 6 UPS and 4 of them died while/after the electricity outage and all the servers were powered off. Every UPS has only 1 server attached to it. And…
Efekan
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Connect Intelligent Power Manager with EATON EDX2000H and WebPower SNMP Card II

We have an EATON EDX2000H, a WebPower SNMP Card II and I have just installed Intelligent Power Manager. I cannot make IPM to see the UPS as power source. It is greyed out (img 1). IPM sees the UPS and its state though. The node driver is…
Thanos
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"Brain dead"ing APC UPSes: likely to be helpful?

I recently got a SUA750RM1U which developed problems shortly after installation; dropping communications with apcupsd, lighting up the load lights in improbable fashions, beeping continuously for no apparent reason, switching to battery and staying…
Jay Kominek
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HP UPS T1500 G3 intermittent buck switching

We have a HP T1500 G3 UPS which we noticed does several short switches to battery quite often during the day, every day. Nothing ever gets reported to its log (i.e. HP Power Protector Notifications), and, what's funnier, the output voltage gets…
vgru
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How to verify if a Windows Server shutdown was complete on server hardware before UPS killed power?

Our Windows Server 2012 R2 machine just got its own UPS (APC Back-UPS RS 550G). I'm using the Windows release of apcupsd and since I would prefer if the UPS would turn off after shutdown I also added the -p parameter to the service. As the…
Energiequant
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APC Smart-UPS 5000VA maximum time

I planning to put a server on this ups (Europe, 230V): http://www.apc.com/resource/include/techspec_index.cfm?base_sku=SUA5000RMI5U&ISOCountryCode=gb My server has a relatively new energy saving power 700W power supply. I checked it with energy…
pluto73
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How to automatically bring servers up if AC returns before the fail process completes?

I have the following processes in place for an AC power loss: UPS emails an "On battery" message UPS sends a power loss shutdown event to the host OS (hyper-V server 2012 R2) Host OS sends SNMP messages (via UPS software) to all vm servers to…
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160KVA 3 phase UPS can take 222Amps load

If I say that my 160KVA 3 phase UPS can take 222Amps load, does it mean per phase or total load? If it is per phase, can I load 222Amps single phase load on each phase i.e a total load of 666Amps?
Aswani Kumar
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How do I setup a server to send emails after starting (i.e. not meaning as an email server)?

Windows Server 2012 R2 w/ GUI, UPS system I am setting up my first server. It is a Hyper-V host that will host multiple VM servers. The system is on a UPS. When the UPS detects an AC power failure, the UPS sends an email via an SMTP mail server…
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