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Questions tagged [ups]

A UPS (uninterruptible power supply) is a device used to provide instant backup power to critical systems for safe shutdown in the case of a power outage.

10
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5answers
2k views

Should the UPS output be exactly same in normal and battery backup modes? Or it is normal to have a slight variation in voltage or something?

My 10 months old PC ran into a problem some days before. My system specs are as follows: Intel Core i7-8700 Processor MSI Z370-A PRO Motherboard 8GB RAM Here are the details about the issue. Most ...
0
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0answers
42 views

Trying to connect to Tripplite Smart1500LCD UPS with NUT on Raspberry Pi 3 B+ via USB. The device keeps disconnecting and reconnecting

I have 2 Tripplite Smart1500LCD UPSes and 2 Raspberry Pi 3 B+ boards running Raspbian GNU/Linux 9 with kernel 4.14.79-v7+. I am experiencing the same problem with both Pis with both UPSes. I am using ...
3
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0answers
75 views

Disabling repeating battery failure alarms on an APC Smart-UPS

I have an old APC SU700I with batteries which were failed on the self-test. Its manual says the following: THE REPLACE BATTERY/BATTERY DISCONNECTED LED IS ILLUMINATED Failure of a battery self-...
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0answers
29 views

UPSmart always gives “connection failure” when connecting to UPS through USB

I want to connect UPS (Irbis ISL1000ET) to OS (Ubuntu 18.04), so that when power is off and battery is low, OS shuts down automatically. However I cannot do this - I installed with superuser ...
0
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1answer
44 views

Cannot access Web UI for Eaton UPS Network-MS card on 172.x.x.x network

I have an Eaton 5PX1500RTN UPS with a Network-MS card installed and I could access the Web UI when I first set it up during initial testing on a 192.168.1.1/24 network. I made sure that I used DHCP ...
1
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0answers
33 views

UPS configuraton — master/slave

I recently bought a Eaton 5PX1500RTN UPS(1440VA/1440W) with a Network-MS card. I connected it via ethernet and can now see the Web UI for Eaton. This thread here gave me confidence that the UPS would ...
0
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2answers
63 views

I have a 450 UPS, will it be enough to let me safely power down my 600watt psu computer?

I don't need to use it, just turning it off if a power outage happens is enough for me.
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2answers
110 views

UPS turning on and off repeatedly

I'm using an Intex Protector UPS. When I push the power button it starts with a beep, which is normal, I know. But when the beep ends, the light which shows power turns off and button remains pressed. ...
0
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0answers
25 views

UPS : general questions

I am currently looking at 2 different rack-mount online UPS(es?) to support some rack mounted devices that I have. Tripp Lite SmartOnline SU1500RTXL2UA (without a network card) APC SURTA2200XL (...
0
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0answers
53 views

How to correctly install libusb-win32 for PCM RPT-800A UPS?

I have a PCM RPT-800A UPS, connected to a Windows 2012 machine. I would like to use NUT for communicating with the UPS.  But shortly after installing libusb-win32 for this UPS, the device in Device ...
-1
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1answer
44 views

How do I get an Oscillogram for this UPS? [closed]

https://www.cyberpowersystems.com/product/ups/cp1500pfclcd/ I want this unit but after reading this post When do I need a pure sine wave UPS? Im a bit nervous on spending this much when I don't ...
0
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0answers
426 views

How to disable power on/off beep on UPS (CyberPower CP1350PFC)

I've had a couple UPS in the past, but the beep on this UPS (CyberPower CP1350PFCLCD) is a little obnoxious and loud. The "mute notifications" button only stops it from beeping during a power outage, ...
0
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0answers
30 views

Repeated hardware failures

I got the following situation: In less than 2 weeks, three PCs of mine failed, 2 of which are industrial-grade workstations. All of them failed while awakening from standby (not hibernation), one ...
1
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0answers
40 views

UPS Transfer Time for external HDD [closed]

Strangely I can't find any discussions on external HDD (3.5 ones powered from wall socket) hold-up times and UPS transfer times. (definitely off-topic for "this site") Example that lead me to this ...
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0answers
50 views

APC Back-UPS ES 600 overload alarm only when USB cable is plugged

I have a APC Back-UPS ES 600 like the one below this. It comes with a USB cable like this so you can test and check its parameters from the computer. The weird problem starts only when I connect the ...
0
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0answers
57 views

Apcupsd not showing voltage/ temperature information on Ubuntu

When I ran apcaccess status in Ubuntu, it returns LINEV 0, BATTV 0.0, ITEMP -273.0 C In Windows, it states: LINEV 224.6V, BATTV 54.5V, ITEMP 28.8 C, What could be causing the reporting problem in ...
1
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2answers
43 views

Change UPS batteries capacity and quantities

Dears, Im no expert and need your advise if what I'm having in mind is possible or not. I own (MGE Pulsar Evo 3000) UPS that uses #6# batteries 12v / 7Amp the UPS is powerful for sure but the backup ...
0
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0answers
377 views

APC UPS SUA 2200 + AP9617, cannot set arp, getting access denied

I have APC UPS SUA 2200 + AP9617 NMC, and i followed this guide : https://joeit.wordpress.com/2012/07/17/assigning-an-ip-address-to-an-apc-network-management-card-without-having-the-apc-software/ ...
19
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5answers
4k views

How does the capacity (kVA) of a UPS affect my power consumption?

I asked my dealer for a 3 kVA UPS for my PC-class computer with a 12V * 8 * 42 Ah battery bank. However, he provided me with a 6 kVA UPS with the same battery bank. He claimed no extra money for the ...
0
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1answer
1k views

Is it ok to turn off and unplug my ups at night?

Hello I have a line interactive UPS that my computer and tv are plugged into, at night I have this habit of turning off and unplugging ( from the wall outlet) all electric devices that I don't use. Is ...
0
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2answers
123 views

What should I plug in first, my voltage regulator or UPS and why? [closed]

My UPS has the following specs: INVO brand Model : 1500VA Input :220Va,c50/60hz output:220Va,c50/60hz Capacity:1500VA,900W My AVR has the following specs: KEBO brand HDR-2000VA Input :14-260 ...
0
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0answers
118 views

Can I use 550W UPS for my CPU that has 750W?

Can I use 550W, 1100VA UPS for my CPU that has 750W powersupply? I feel like we messed up on buying this UPS. We did check the specs before buying but the technician available there when we tested ...
0
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1answer
160 views

APCUPSD: Cannot find UPS on ANY serial port

I have APCUPSD installed on a computer with 2 physical serial ports. The UPS is an APC SUA1000 with a serial port. I have the APC smart serial cable connected to COM1, and COM2 going to another ...
2
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1answer
111 views

Windows 10: Turn on UPS beeping

[Windows 10 Pro x64, v 1709, APC Back-UPS 550] I am using the OS-native battery control for power management. I seem to be having the opposite problem of everyone else on the interwebs: my UPS did ...
0
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0answers
34 views

lsusb hangs with ups connected

We have a bunch of servers on Debian Jessie. each server connected to ups via USB. on 3 servers of them, there are problems with lsusb. lsusb hangs randomly I also use cat /sys/bus/usb/devices/XXX/...
82
votes
2answers
13k views

Identify an Unusual USB Port

The back of our APC Smart-UPS 2000 has a USB port so that it can be monitored from a server it supplies. However, this USB port doesn't appear to be a standard USB connector. It looks a little like ...
0
votes
1answer
481 views

How to communicate with ups with a serial port?

I have this offbrand chinese ups that I want to plug in my computer, the manual state that it has a "COM port" but nothing else about it, it doesn't provide a driver neither. Plugging the UPS with a ...
0
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1answer
803 views

How can I prevent Windows from applying updates when shutting down when low UPS charge is left?

My PC is connected to power supply via UPS. It can provide emergency supply for about 5 minutes. This could be not enough to install updates when I push 'Power' button on my PC. So, my question is: is ...
0
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1answer
79 views

Can I use a 900W UPS with 1100W system if I need to cover blips only?

I may get unstable voltage or lose power for less than 2 seconds in winter season. I have a system that consumes 1000-1100W. Is it enough to get a 900W UPS for that purpose? I don't care if system ...
1
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0answers
101 views

APC SmartUPS - possible to control outlet group from command line?

My home (Debian) server has an APC SmartUPS 1500 LCD (model SMT1500I) attached via USB. Monitoring and automatic shutdown works perfectly through apcupsd. Since I have a lot of spare headroom on the ...
1
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1answer
120 views

UPS to keep router running for 8 hours at a time

We have a modem / router combination on a building site. The router keeps going down because the power keeps getting turned off for electrical work. Is there a type of high capacity UPS that could ...
2
votes
1answer
435 views

can i charge UPS's external batteries using external charger ? while UPS is ON 24x7?

What are the cons of using an external battery charger for charging my UPS's external batteries while the UPS is on? I have an inverter/UPS with external battery. I am tired of constant PC reboots ...
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0answers
72 views

Can UPS be purchased without containing batteries?

For an assignment I'm designing an Alternative Power System (APS) for a university building. Another group is design solar cells for the building which will contribute to the grid. The building ...
0
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1answer
71 views

Turn hard drive and computer on/off based on ups status

I have an APC UPS BR550GI, an Intel NUC with Linux Debian on it and a WD 3.5" drive in an external enclosure with power supply, turn on/off switch and it is connected to the NUC via USB 3.0. Both the ...
0
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1answer
126 views

Do I need two NIC cards if my UPS only has a network port and I need to stay connected to the internet?

I need my computer to be connected to the internet and gracefully shutdown in the event of a power outage. This is an APC ES550 but it's a little old. It doesn't have a USB port that I can find. Do ...
0
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1answer
127 views

Correct calculation of UPS VA based on nominal equipment power draw?

If I have a server whose components are known, and I can look up their active/maximum NOMINAL power draw, how do I get from the total to a UPS VA capacity that will allow it to be used for X amount of ...
0
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1answer
487 views

Adding another UPS battery in parallel, to increase runtime/VA capacity

Can one parallel two identical batteries and connect to the UPS, and will it act as a single battery of double the capacity? Or is there a problem electronically with it? According to this answer, ...
0
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0answers
37 views

UPS power calculation

I calculate here 420 watt for my system unit, also monitor needs 45 watt. If I get UPS with active power 500+ watt, would it be enough? My current power supply is for 600 watt. Or better to buy UPS ...
0
votes
1answer
55 views

Are there specific batteries for pure sine wave UPSes? Do I need a specific type of UPS battery?

If the battery of my pure sine wave UPS dies, can I replace it with a common UPS battery, or are there specific types of sine wave UPS batteries?
0
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1answer
57 views

UPS Power in VA for a “20 W 120 V” equipment for 1 hour

Considering the UPS is running on its battery, I'd like to calculate the power, in VA, that a UPS must have, to feed an equipment that consumes 20 W and is 120 V. It's a guitar amplifier
1
vote
1answer
780 views

Windows Defender Security Center warning icon

I have APC Back-UPS CS 500 connected by USB to my Windows 10 desktop computer. In power config I have set 'Sleep' option to 'Never' setting for RDP access as described here: http://windows.microsoft....
3
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6answers
2k views

Can you plug a UPS into another UPS?

In order to provide graceful degradation of function in case of total blackouts, I would like to have my smaller UPS plugged into the larger one so my main computer lasts the longest. Question: Is ...
0
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1answer
523 views

How to prevent UPS from waking up computer through USB?

I have a Eaton 3S 700 UPS plugged to my Windows 7 Pro 64-bit computer by a USB cable, and I can't prevent the UPS from waking up the computer constantly. This happen both when the UPS is in battery ...
3
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3answers
572 views

Computer plugged into UPS plugged into surge protector plugged into ungrounded outlet

I was reading that a surger protector won't work if it is plugged into an ungrounded outlet. The reason why this wouldn't work is that the electricity has nowhere to go, from what I've read. What if ...
0
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0answers
601 views

UPS Keeps switching from On-line to Battery

I have an APC BACKUP XS-1000 UPS that has a brand new battery installed. Upon installation, the UPS keeps switching from On-Line to Battery power. Nothing has been plugged into the unit and the new ...
1
vote
1answer
89 views

UPS Sizing with large PSUs

I have a couple servers in my garage running ESXi. Each server has a 1000W gold rated PSU which I bought second hand from a miner. They work great and were pretty cheap. These are not super powerful ...
0
votes
1answer
432 views

Automatically put PC in sleep mode/low power mode on power outage

TL;DR: I need a cheap and simple way to run script on PC whenever there is a power cut. I have a high power desktop, and APC UPS (BR1500VA). I live in a city with about 1 power outage every day, for ...
2
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0answers
43 views

PowerChute Personal on Windows 7

APC UPS PowerChute Personal edition battery is not visible under the Configuaration> Power Options under Advanced Settings Balanced Power plan. The Battery Option should be visible to configure: ...
0
votes
2answers
856 views

Put computer in hibernate when power outage happens

I have a Cyberpower UPS connected to my desktop PC. I would like the computer to automatically go into hibernation after a couple minutes of a power failure (i.e. UPS switching to its battery). The ...
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0answers
72 views

How to start a computer when UPC comes back on power?

I have a small Intel NUC computer in ny closet which I use mainly for Plex Media server. I have it on an APC UPS to be able for it to continue normally in case the house loses power for a short time. ...