home Repair Why do you need UPS. What is an uninterruptible power supply and how to choose one? How to use an uninterruptible power supply

Why do you need UPS. What is an uninterruptible power supply and how to choose one? How to use an uninterruptible power supply

The main purpose of the source uninterruptible power supply(UPS) - temporarily provide power to the equipment during power outages. Connecting computers via UPS is accepted everywhere. True, for many users this is a kind of “rule of good manners”, and the practical meaning of this ritual eludes them. “Well, a UPS protects your computer from power surges….” Let's try to figure out: what, from what and how does an uninterruptible power supply protect?

By internal device and logic of operation, all UPSs are divided into three classes: passive, line-interactive and double conversion UPS. Accordingly, they cope with accidents in the power grid to a different extent and belong to different price categories.

Passive(stand-by, VFD, back-UPS, redundant) sources are the simplest and cheapest. In them, the battery power circuit is usually turned off, and starts only when the mains voltage fails. The switchover time from mains operation to battery operation is tenths of a second, and the output signal when running on battery is noticeably different from the "correct" sine wave. As a rule, a simple noise filter and a fast-acting fuse are installed at the input of such UPSs. The first partly smooths out impulse noise, and the second should work with a significant increase in voltage in the mains. Passive UPSs are designed to power home and office PCs. A small "dip" in the output voltage at the time of switching to the battery computer blocks nutrition is not terrible.

Line Interactive(line-interactive, VI, Smart-UPS) UPSs are distinguished by the fact that they have a battery power circuit always on. When the voltage at the input of the “uninterruptible power supply” disappears, its output sockets almost instantly switch to the internal converter - this transition is almost imperceptible for powered devices. In addition, many line-interactive UPSs are capable of automatically maintaining output voltage 220 V. This is done in two ways.

While the mains voltage is in the range from 175 to 275 V, the AVR mechanism (Automatic Voltage Regulation, automatic voltage regulator) is activated. If the input voltage deviates by 10 to 25% below the nominal value, the UPS increases the output voltage by 15%. When the input voltage deviates by 10% to 25% above the nominal value, the UPS reduces the voltage by 15%. If the mains voltage is outside the limits, the line-interactive UPS switches to battery power. In this mode, it continues to work until either the mains voltage returns to normal or the battery is discharged. However, such UPSs should not be considered as voltage stabilizers. The mode of "stabilization" is forced and short-term!

AT double conversion UPS(double conversion, VFI, Online-UPS) the output voltage is always supplied from the converter, the converter is constantly running from the battery, and the battery is continuously charged from the mains. In fact, the input and output of the UPS are galvanically isolated from each other, and a stabilized voltage is supplied to the output. This is the most reliable, but at the same time uneconomical scheme. The UPS itself turns out to be expensive, large and heavy, the converter gets very hot and requires fan cooling, and energy losses during the conversion amount to tens of percent.

Double conversion UPS is used only to power servers and computers in critical cases. Such models rarely go on sale - they are usually delivered to order. Most likely, to power work computers, you will purchase passive, maximum, line-interactive UPSs.

The power of uninterruptible power supplies is usually indicated in volt-amperes (VA, VA). To convert these values into more familiar watts (W), you need to multiply the power in volt-amperes by a factor of 0.6. For example, a UPS with a power rating of 600 VA will provide power to appliances with a maximum consumption of 360 watts. If you give a large load, the current protection will work, and the “uninterruptible” will turn off. In practice, it is desirable to provide about 30% power margin. Thus, the most common 600 or 650 VA UPSs are suitable for powering a computer with a real consumption of 200-250 watts and a monitor that draws about 30-60 watts more.

If the arrangement of computers in the room allows, it is more profitable to use one powerful UPS instead of a few small ones. For two office computers, you will need an uninterruptible power supply with a capacity of about 1000 VA. To power three computers standing side by side, one source with a capacity of about 1400 VA is enough.

So what does the UPS protect against?

The filters in the power supply of the computer and monitor also do a good job of limiting impulse noise from the network. However, two filters are better than one! Surge protection is also important. If, for example, the neutral wire in the shield burns out, a voltage of almost 380 V may appear in the outlet. In this case, varistors and fuses usually burn out in the power supplies of computers and monitors. Repair cheap, but takes time. In theory, the UPS should respond to a power surge before the fuses in the equipment connected to it burn out.

However, data protection comes first. If the computer's power is turned off in an emergency, all unsaved information is lost. The UPS allows you to either save open documents and gracefully shut down, or put the computer into sleep mode. Manually saving documents is easiest. Switching to battery power, the UPS starts beeping loudly. Once you hear such a warning - check if everything is saved. Next, look at the situation: either just turn off the computer, or put it into sleep mode.

To enable automation, it is necessary to connect the control port (USB or RS-232, depending on the model) of the uninterruptible power supply to the computer with a signal cable and install the necessary software on the computer. Unfortunately, many users are not even aware of this possibility! The UPS is controlled by a built-in microcontroller. Its firmware (firmware) constantly monitors voltages and currents in external circuits, when turned on and periodically during operation, it performs electronics and battery testing. It also outputs to the control port information about the current mode of operation, the status of the UPS components. Through the cable, these data are sent to the computer, where they are processed by the monitoring program.

To work with the UPS, it is advisable to use the program offered by its manufacturer. For example, for APC (www.apc.com) this is the Power-Chute program, for Ippon (www.ippon.ru) - WinPower2009 and Ippon Monitor, etc. The program can be installed from the disk that comes with the kit, but it is better to download the most its latest version from the manufacturer's website.

In the application settings, you need to set the automatic shutdown options. As a rule, there are two options to choose from: either turn off the computer after a certain time after switching to backup power, or do it some time before the expected complete discharge of the batteries.

How long can a "bespereboynik" be able to work on battery power?

It depends on the battery capacity and power consumption. Most popular models have one battery with a voltage of 12 V and a capacity of 7 Ah. Theoretically, a UPS with such a battery has an energy reserve of about 80 watt-hours. Simply put, it should power a load with a power of 80 W for about 1 hour, 160 W for about half an hour, 300 W for about 15 minutes, etc. In reality, taking into account conversion losses, this time is about half that.

In sources with a power of more than 800 VA, two of the same batteries or one, but with a larger capacity, are usually installed. Tables or calculators for determining time battery life at different loads for different models are given on the websites of manufacturers. However, "offhand" it can be assumed that any model will be able to power the load of its rated power for about 5-15 minutes. If you need to provide a sufficiently long battery life for your computer, it is better to take a high-capacity UPS with capacious batteries. It will work only at a third or a quarter of the rated power. But such a load, low for himself, he will be able to supply energy for half an hour or longer.

Uninterruptible power is also useful for network equipment (switches, routers, NAS). Otherwise, when the power is turned off, the network will immediately “fall”, and documents opened from network folders, cannot be saved. You can power the switch from the UPS of the workplace closest to it, although it is more correct to install a separate “uninterruptible power supply” of low power for this.

Battery life is limited. As it works, its capacity steadily decreases and after 3-5 years of operation it drops to almost zero. Even before the indicator on the UPS signals the need to replace the battery, it becomes noticeable that the battery is no longer “holding a charge”. Each time the battery life is reduced. In principle, a couple of minutes is enough to save documents and shut down the computer correctly. When the UPS starts to turn off even earlier, it is definitely time to change the battery.

Replacing the battery is easy. In popular APC brand UPSs and some others, the battery is located under a removable hatch or cover. To get to the battery in Ippon, SVEN and similar UPSs, you need to unscrew the four screws on the bottom and separate the case halves. In the instructions and on the official website, you are unlikely to find a description of self-disassembly and replacement: like printer manufacturers, UPS manufacturers receive a significant share of their income from the sale of “original” batteries with their installation in authorized service centers.

Nevertheless, almost all computer stores sell sealed lead-acid batteries in the most common sizes. The brand and manufacturer do not play a role: these are quite standard products. First, open your "uninterruptible" and find out which battery is installed in it. For most "office class" UPS (500-700 VA), batteries marked 12V 7Ah with dimensions of 151 × 94 × 65 mm are suitable. Installing new battery, try to tightly put the terminals on the contact petals of the battery. If the terminals are loose, they can be gently tightened with pliers.

After installing the battery, it is advisable to calibrate the UPS so that its firmware evaluates and remembers the parameters of the new battery. Fully charge the battery within a day. After that, remove the plug from the socket so that the UPS switches to autonomous power. Allow the battery to fully discharge until the uninterruptible switch turns itself off. It is better to use not a computer as a load (although in extreme cases this is permissible), but several light bulbs with a total power of about 300 watts. Then reconnect to the mains and turn on the UPS - let the battery charge and the device will continue to operate normally. In addition to calibrating the device as a whole, this procedure is also a “training” of the battery. After a full cycle of "discharge - charge" the battery begins to use its capacity to the maximum.

Why do many UPSs have telephone (RJ-11) and network (RJ-45) sockets?

By definition, "uninterruptibles" do not need a telephone or a local network. It's just that as a "bonus" in the same case with the device, there are pass-through filters for impulse noise for the telephone line and the network. Connect one socket to telephone socket on the wall, and turn on the other telephone set. If a high-voltage interference occurs on the telephone line, for example, during a thunderstorm, the filter will smooth out the voltage surge and protect the phone.

UPS selection

First of all, you should pay attention to the following characteristics:

Maximum power, measured in volt-amperes "VA" and watts "W" (the choice depends on the power of the computer and monitor, the larger they are, the larger the UPS numbers should be);
Battery life at full and half load (5 and 15 minutes are good);
Input voltage range (within what limits the UPS will cope without using a battery, preferably 180-250 Volts or wider);
The number and type of sockets for connecting devices (there may be ordinary "Euro-sockets", or there may be special computer ones).

When buying a UPS, it’s better not to save money, otherwise you will have to pay extra regularly later (for too frequent battery replacement or repairs), and who wants this?

When choosing an uninterruptible power supply, you can follow simple rule: don't buy under $90.

There is one exception to this rule which I have described in comments to this article ().

Starting from $ 150-200, there are even more reliable models that work according to a more advanced principle, but this price is not already affordable for everyone.

UPS and computer power supply compatibility

One thing to know before buying a UPS important point, which is not often talked about:

Some computer power supplies do not work correctly with the UPS!
You can check with the seller, informing the model of the power supply.

In one of the following IT lessons (but at a higher level of training) we will look at why this is and how to avoid this problem. If the question does not tolerate, then contact the comments on this article, I will try to help.

Connecting the surge protector and UPS

The connection is pretty simple:

AT network filter or the UPS turns on the power cord of the system unit, monitor and other external devices(scanner, printer, etc.).
The plug of the cord of the filter itself or the UPS is connected to the household electrical outlet.

If you are using a UPS, then it is not necessary to connect a surge protector, except to increase the number of outlets or as an extension cord.

Note: a laser printer cannot be connected to a UPS, as it has too much power, often a special socket is provided for it, which is not powered by a battery, but has an interference filter (in the last photo in the article, such a socket is painted white).

Summarize

The main idea of this lesson is that a surge protector and an uninterruptible power supply are necessary things and should be used with every computer. If you do not have these devices yet, then be sure to buy at least a surge protector!

So, we figured out the important additions, now you can move on to the sixth IT lesson. It's on the way, stay tuned! Here is a link to receive site news to your email.

Copying prohibited

Video supplement

Today, as an addition, a video from the Chip and Dip company about uninterruptible power supplies:

P.S. Isn't the information too complicated? I have a request for you: write in the comments to this article what is not clearly described, I will correct it!

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Communication and exchange of experience (146 comments):

And I will criticize, because The article is written VERY superficially.
UPS cost from 600 UAH. Normal, inexpensive, reliable ARS. There are no alternatives in terms of durability and reliability, and which is actually shown in the photo in your article.
And about the protection of telephone lines, are you generally silent?

Network filters? For 30 UAH there will be a cheap Chinese non-name extension cable. As you write, "the best protection" will be provided by ARS, Belkin worth 150-200 UAH. What about the ability to turn off the power separately in each outlet, like in Sven Pro? And again, the protection of the bodies. and lan lines?

And about the third type of protection - stabilizers, why not say a word?

The article is designed for housewives who need a UPS only in order to have time to save a page in classmates.

No offense.

I love and welcome criticism (if it is justified, adequate and constructive).

I will answer your comment, Valentin.

1. UPS from 600 UAH
The UPS shown in the photo has been serving me for 11 years without changing the battery and is no longer being produced.
There is a UPS that costs $80 (640 UAH) APC BK500-RS almost like mine, it doesn't have phone line protection, but the mentioned model is really good. This model can be considered exception to the rule.
The next price model BK500EI costs more than 800 UAH (it has a wider voltage range and a connection with a computer via USB and a telephone line filter).
(A link to this note has been added to the article.)

2. About the superficiality of the article.
Most likely, you did not pay attention to the description of the site and the category of this article.
Let me explain: this site is a guide from beginner to professional and the complexity of the material grows gradually. This lesson belongs to the "Level 1 Beginner" category, so I did not deliberately complicate the material. When we get to Level 2 and 3, then we will consider in more detail the different components, including those mentioned in this lesson.

3. “How do you write “the best protection” will be provided by ARS, Belkin worth 150-200 UAH.”
Where did you see that I advise "Belkin worth 150-200 UAH"? How about the phrase about the UPS "do not buy less than $ 90"? This is about surge protectors, I said “the best protection is models from $ 12”, which include Sven, Platinum Pro.

4. About protecting telephone lines, separate switches for sockets, stabilizers, etc.
Not everyone needs phone line protection anymore, but it is available in the recommended price range. As an electronics engineer, I can also explain the effectiveness of this protection “for show” (in this price range).

I have a network Sven, Platinum Pro, from my own experience I can say that not everyone needs separate switches, this is far from the main characteristic.

I did not mention stabilizers, since they are used less often (again, based on my practice), and determining the need for them, and even more so their choice, is a separate issue.

The main thing that a beginner should remember after this article is the importance of needing at least a surge protector, as well as the thought of purchasing a UPS.

And I have nothing to be offended by, on the contrary, thanks for the criticism!

It is not entirely clear to me, due to what the filtering of the mains voltage, the mains filter occurs. Maybe in this surge protector there is some kind of circuit other than five sockets for plugs. My computer and other consumers are powered by a voltage stabilizer. The question is, how can you connect a car battery to a voltage stabilizer in order to protect yourself from unexpected power outages.

Of course, Victor, in addition to sockets, there are elements in the surge protector that reduce sudden power surges (which last for a fraction of a second).

Directly connect the car battery to the stabilizer will not work. Additional special circuits are needed: one for converting the battery voltage (+12V) to the computer supply voltage (~ 220V), the second for monitoring the absence of voltage in the network and switching power to the battery with a converter. This is all simplified.

I do not think it makes sense to try to make such circuits yourself, since cheaper, more reliable and safer use uninterrupted power supply unit(UPS).

I bought a UPS by Checkcom 425. Explain, please, whether I connected the system unit and monitor to the back panel of the UPS correctly. There are 3 slots on the left to BATTERY BACKUP, I connected 1 monitor on top, 2-below it-system unit. Did I do the right thing by connecting the monitor and the system unit to the OUTPUT of the UPS with backup power. It's all on the left. On the right side there are 2 slots_OUTPUTS UPS with voltage filtering only. I did not install anything in these sockets and also on the right below them is the INPUT network connector, I connected this connector with a plug to the surge protector socket. Please write to my e-mail. There was no driver and instructions in the package, I'll go to the store to figure it out.

Hello Ludmila.

Since there is no exact description of your UPS model, I can only answer based on the comment, according to which I can assume that you have an IMP-425AP or IMD-425AP model. If so, then you connected the monitor and the system unit correctly (on the photo from the official site, the inscription “UPS + Surge”).

The instruction, of course, should be included with the UPS itself. If the store is stubborn, you can download the instructions from a href="http://www.pcm.ru/" target="_blank" > official site.

Check the model designation on the UPS itself, if you have any questions, please contact.

Thank you Serezha for the quick response! The full name of my UPS is Line Interactive UPS. Imperial UPS, with display. Improved protection. The store gave instructions and a USB cable. When I connected this cable, it's good that I have a lot of slots on the back and front of the system unit. Battery indications appeared 1 pc. HID UPS Battery, chemical composition PdAc. Energy reserve - mains powered. What confuses me is what is written about the battery: the date of manufacture is 12/23/2009. Is the battery too old? There was no driver. I downloaded the UPSMON program from the Internet, but it writes that it is impossible to connect to the UPS. I have a 4-core computer, Athlone 640 3.0 GHz, video card GT 440 1 GB (128), screw 750 GB, RAM-4 GB. BP-400. The computer is sealed for 2 years (warranty). All data from AIDA. It seems to me that a UPS with 425 VA, 255 watts is rather weak for my computer, although enhanced protection is written. Basically, the computer was taken for games. I look forward to your advice. Sincerely, Ludmila.

Indeed, for your configuration, the UPS power of 255 watts is small.

Here is a rough calculation of the power of your PC:
Athlone 640 processor - up to 95 W
GT 400 video adapter - up to 65 W
Motherboard - up to 35W
Hard drive - about 12W
DVD - about 10W
RAM - up to 10W
USB devices, etc. - up to 10 W
Total for the system unit: 237 W
Let's add 20% to the stock and get 285 W

Let's not forget about the monitor (what diagonal?) for a 22 inch monitor 30-45 W

Total system unit + monitor - up to 330 W at maximum load!
Real numbers may be lower, but a UPS is desirable in terms of power at least 300 watts.

P.S. I would also pay attention to the computer's power supply. If the manufacturer is too "economical", then the real maximum power may not be 400 watts, but somewhere around 200-300 watts. If the PSU is of good quality, then there should be no problems.

Regarding the date of manufacture, I will give an excerpt from the instructions for the UPS:

6.3 Long term UPS storage conditions
6.3.1. When the storage environment temperature is -15°C to +30°C (+5°F to +86°F), the UPS battery must be recharged every 6 months.
6.3.2. When the storage environment temperature is +30°C to +45°C (+86°F to +113°F), the UPS system battery needs to be recharged every 3 months.

Those. we can conclude that two years of storage without recharging could well reduce the battery life. It's hard to say by how much.

Monique Acer 19*, I think it is ideal for close distance on the table, large monitors strongly affect the eyes (close distance on the computer table). Upgrade can be done only after 1 year, warranty for 2 years. But my computer is very quiet, all the games Black Ops, Crisis, Metro, etc. pull without problems. WDC WD7500AARS-00Y5B1
Temperature 34°C

Winbond W83627DHG-P
CPU VCore 1.408V
AVCC 3.344V
3VCC 3.344V
3VSB 3.472 V
CPU 40.50°C
Auxiliary 33.50 °C
System 33.00 °C
System Fan 20149RPM
CPU Fan 1082RPM
This is the pace now. after cs 1.6. If I only change, then the south bridge of the mother Asrosk 68, I think that it is rather weak for my computer. Although it is better not to upgrade, but to buy a powerful gaming computer every 3 years. AUX - I think it's the PSU temperature.

Vision is more affected not by the diagonal, but by the brightness and the way it is adjusted, which was implemented by the monitor manufacturer (a separate article is planned on this topic in IT lessons).
The size of the interface details also affects fatigue, which depends on the screen resolution for the current diagonal.
But we digress, the question was about the power of the monitor 🙂

At the expense of temperatures - everything is fine, but it was originally about the quality of the power supply.
You can compare voltages (especially +12 V) at minimum and maximum loads. But it is better not programmatically, but actually (by a tester), only in your case this is not possible (the system unit is sealed).
If the voltage deviations are large enough, then it is better not to trust such a PSU.

Good afternoon, I will ask a question about the UPS and the interference (traveling background waves) displayed on the monitor (LCD) because of it, which are noticeable mainly only in recent games(Crisis 2, Witcher 2, Sniper Elite, Battlefield 3)
Monitor- Asus 24T1E-H
UPS-EP1500
The outlet is not grounded.

Diagnostics:
1. When the monitor is connected directly to a free outlet, no interference was detected. (UPS at a distance of ~ 1 meter from the monitor)
2. When connected to a surge protector socket, the power cord of the UPS is inserted into the 1st plug into the 2nd power cord of the monitor - Interference is detected.
3. Connecting the monitor power directly to the UPS (connected to a socket without grounding) - Interference is detected.

P.S.
1. A PC with an Antec HCG 750 power supply is connected to this UPS
2. These interferences are noticeable only in powerful 3D games, there are no such interferences when watching movies and working in the OS.
3. In all tests, the UPS did not move and is located at a distance of approximately 1 meter. (I didn’t see the point of rearranging, since no interference was found by connecting directly to the network.)
4. I tried to connect an APC P1-RS surge protector to the UPS (which, according to the manufacturer's specifications, filters em interference), and the monitor's power cable to it did not help.

Please tell me how to get rid of interference by connecting a monitor with a system unit to the UPS.
Grounding will not work.

Thank you for your attention.
Sincerely, Chernyshenko Vladimir Anatolyevich.

So, all the same, about stabilizers - as far as I understand, they are something intermediate between a surge protector and a UPS, but not all UPSs have stabilizer functions. But in what situations are stabilizers needed in practice? Do they perform the functions of a mains filter or exclusively stabilize under/overvoltage?

The situation is this - the light in the apartment blinks from the air conditioner and the computer in games (i.e. under load), it sometimes goes into cut - will the stabilizer solve this problem or will you definitely need to spend money on a more expensive UPS?

Alex, let's clarify two questions first:
1. Does the light blink periodically for short periods of time (up to 1 second), or does the light remain dim for a longer time (more than 5 seconds), and then return to normal?
If periodically and up to 1 second, then the UPS should cope.
2. Did I understand correctly that you already have a UPS and, despite this, the computer restarts during short (?) power surges?
For stabilizers. Their purpose is to bring the voltage level to normal (220 V) and keep it for a long period of time. If power surges are rare and short, and mostly the voltage is normal (about 220 V), then a good UPS is preferable.
- 1. The light blinks for a fraction of a second.
  
  2. No, there is no UPS.
  
  In general, I would like to understand what is called reverse continuity between these three devices - a filter, a stub and a UPS. Those. will the stabilizer perform functions incl. surge protector, and the UPS to act as a surge protector and stabilizer? Or, if I want to provide maximum protection, do I need to buy a surge protector, connect a stabilizer to it, and power the UPS from the stabilizer?
  
  And another question regarding power supplies - as far as I know, various protection, filtering and voltage stabilization systems are already built into expensive PSU models - is this true and if so, how does this correlate with the equipment we are discussing (filter, stub, UPS)? And how to determine the presence of such functionality in the PSU.
  
  Thanks for answers.
  - PSU, UPS and stabilizer must contain a filter, but in cheap models, the manufacturer "misses" it or greatly simplifies it.
    Expensive UPSs contain both a filter and a stabilizer. You can recognize them by labeling. "Line-interactive" (interactive). For maximum (!) Protection, servers use "double conversion" or "Online" UPSs.
    The stabilizer is mainly used to power household equipment (when the voltage deviates greatly from the standard one or there are frequent power surges in the network). For a PC, a good UPS is preferable, if necessary, with a built-in stabilizer.
    The input voltage range (and for the PSU too) is indicated in the specifications.
    - It turns out to be more profitable to take some FSP Aurum CM 550W with a filter, a 90-264V stabilizer and all kinds of protections (OCP, OVP, SCP, OPP, OTP, UVP) than to spend money on expensive filters, stubs and UPS. Who does not need a safety net of the work done in the form of a battery, of course.
      
      Apparently, restarting the computer is not related to the blinking of the light, at least I didn’t trace the dependence - I can leave it for the night, and wake up in the morning and find that it was rebooting. At the same time, without blue screens and other errors, it just abruptly goes into overload and that's it. It doesn't happen often, but it's annoying. Could this be related to the power supply? I have FSP HEXA 500W 80 PLUS.
      - A good stabilizer with an input range of 90-264V, and even at an affordable price, is problematic to find.
        I repeat, it is better to take a good PSU (from 40-50 USD) + a good UPS (from 80-90 USD).
        
        As for the periodic reboot of the computer, offhand it is impossible to say. Look at "System Log".
        Maybe a PSU, and RAM, and a joint venture, and a hard drive, and a Video adapter ...

Hello, please tell me what is the reason. The computer turns off at night, and does not work in the morning, it turns on only when the cord from the system to the PSU is replaced, while the PSU itself is working and another computer works with the same cord that was replaced by the same PSU

Hello, Tatyana.
Judging by the description, it looks like a bad contact between the cord and the connector in the power supply. It is very rare, but I have had a similar case in practice. If everything works well with the second cord, then leave it and the problem is solved, if the problem persists, then try the following option:
It is necessary to check (visually) the contacts on the pins in the PSU connector, if they are oxidized or dark, then carefully clean them. You may need to choose a cord that will work well in your power supply connector.
But these recommendations are only if you have described the problem in full.
1. Confusing Phrase "cord from the system to the PSU". May be "cord from the system unit to the UPS"? Where is the cord connected from the power supply in the system unit?
2. Is there a surge protector and/or UPS?
3. In the morning, when the computer does not turn on, have you tried to simply unplug the cord from the outlet, then plug it back in and press the power button?

Good afternoon, Seryozha! I have already asked for your help and I am grateful to you for your professional answers. Sorry, I need your advice again: the tray shows the battery icon from the UPS 99% (remaining). Battery name
HID UPS Battery, PbAc chemistry, energy storage: mains power, charging. Date of manufacture 12/23/09 Question: can change the battery, term UPS usage 2 months Sincerely, Ludmila.

Hello Ludmila.
Given that the battery is 2.5 years old (since production), 1% wear is a very good indicator. So far, there is no point in changing the battery, keep an eye on its condition in the next 2-4 months. If in 2 months the condition of the battery deteriorates by more than 5%, then you should think about wearing out too quickly. But now there is no reason to worry.

Good day, Sergey! As always, I look forward to your professional response! The UPS is standing, the monitor and the system unit are connected to it, then it is connected to the surge protector, the surge protector is already connected to the outlet. Question: during a thunderstorm, if there is a UPS, is it necessary to pull out the mains plug from the system unit and remove the plug from the mains filter.?

Hello Ludmila.
During a thunderstorm, the first thing to do is disconnect the cable through which you are connected to the Internet(twisted pair from a network card or router, telephone cable from a modem). After disconnecting, it is advisable to place the cord away from the connector and the device itself (computer, laptop, router, modem).
Why in the first place? Statistics show that most often during a thunderstorm it fails Network Card and/or PC motherboard.

Secondly, it is desirable unplug from outlet the device that powers the computer (filter, UPS, or power supply cord). Additionally, pulling out the cord from the power supply does not make sense. It is also advisable to place the disconnected plug at a distance from the outlet.

Generally, during a thunderstorm, it is advisable to turn off from the electrical network all devices especially in a private home.

*After disconnecting, it is advisable to place the cord away from the connector and the device itself (computer *, - DID NOT KNOW!

*It is also advisable to place the disconnected plug at a distance from the outlet*-. DONT KNOW!

So, the UPS will not save the computer during a thunderstorm!

Thank you very much, Seryozha! So I will do as you suggested!

Good morning Serezha! You are like me Ambulance for my computer. On this battery right click mouse: Power properties, there is a tab: power management schemes, now I will list:
home / desktop
Portable
Presentation
On all the time
Power Saving Manager
Battery saving
In the power of the game mode plan
Which circuit is the best, what can you say about BATTERY SAVING?
I set it to Home/Desktop.
Sometimes charging appears at 96%, I press refresh, it returns to 99%.
Sl. tab: power buttons
it says when you press the power button on the computer - shutdown
When you press the button to go to sleep mode, the transition to standby mode. This is how I stand.
I disabled sleep mode
Alarm tab: Low battery alarm, checkbox ENABLE such battery at 30% level
Signal almost full discharge battery is checked: ENABLE such signal at 99% level
the tray shows the battery icon from the UPS 99% (remaining), sometimes it shows 66%. Battery name
HID UPS Battery, PbAc chemistry, energy storage: mains power, charging. Date of manufacture 12/23/09. I bought the UPS in May 2012, the UPS itself is 2011, why are old batteries inserted into the UPS?
I trust you, therefore your advice is very necessary! Sincerely, Ludmila

Thank you Serezha! Everything is clear and understandable! Today the light turned off, the UPS was beeping, there was a message on the monitor urgently change the battery, the charge was 77%. There was no light for about 5 minutes, the UPS did not turn off, it squeaked, and then the light turned on and the battery began to charge up to 96 percent. Sometimes 99% appears, but less often., Five months have passed. after purchasing a UPS. The UPS itself does not need to be changed, only the batteries, right? And what is the cost of these batteries, I have only one. When will I buy, how will I determine the year of manufacture of the battery? Sorry again, I have no one else to turn to, I do not trust sellers, it is advisable for them to sell stale goods.

Maybe off topic: in May 2013, the 2-year warranty of my system unit ends, the case of which is sealed with stickers. Am I doing the right thing:
1. Take it to a specialist to clean it from dust and change all coolers and radiators to expensive ones.
2. My mother is a cheap budget one, where the south bridge heats up in games in the summer up to 65 degrees, will the Gifors GT 560 DDR5 video card fit it (I know that 256 bus is better than 128) not by 1 GB, but by 512 MB, but tire 256
3. I won’t add RAM, because I love XP and don’t want to change to another OS, but 4 GB is enough for me (for cs and other computer games)
I have a 440 GB PSU, I think the new video card will not stand it, I will change it to a 650 pb chip.
Your advice: will my mother survive this upgrade, I like the AMD 4-core 640, it does not get warm. Can only change the cooler and radiator on the video card? I need your advice as an expert. Sincerely, Ludmila.

A discharge of 20% in 5 minutes is quite normal, you can not change the battery. When in 5 minutes it will be discharged up to 20%, then it will be possible to think about replacing it.
Interestingly, the message "change battery" was displayed from the OS or from the program of the UPS manufacturer?
How did the UPS beep? The manual for one similar to yours states the following:

Infrequent beeps (once every 2 seconds) - Battery backup.
Frequent beeps (2 times per second) - Low battery.
Continuous beep - Overload.

Of course, the uninterruptible power supply itself does not need to be changed - only the battery.
To find out the cost, you can look here: http://hotline.ua/computer/akkumulyatory-dlya-ibp/ (as I understand you live in Ukraine).
Presumably you have a battery. CSB GP1272 F2 or Yuasa NPW36-12 (can be NPW45-12), check the exact model when disassembling the UPS (see instructions). The link to the first http://hotline.ua/computer-akkumulyatory-dlya-ibp/csb-battery-gp1272/ indicates a price range of 180 - 235 UAH.

date of manufacture indicated on the battery case:
- For CSB, this is a circle with an arrow;
- For Yuasa, these are the numbers near the red terminal, the first two are the year, the third and fourth are the month (09021830 - February 2009).

Hello ... Today something happened to the PC and it froze ... I had to turn it off directly from the outlet (Nothing helped ... after that I barely turned it on (and then when all the cords were installed well), but now I can’t turn off the UPS ((lit button and that's it .. I hold it down, but it does not turn off .. I turned it off from the outlet so it squeaks and everything ... what I just didn’t do ... it’s very strange (why did this happen? I’m now afraid that the light will be turned off, and it will squeak for 3 hours and I I can't turn it off

It is difficult to judge what happened from your words, there is too little information.

1. When you turned off the computer, did you try pressing the power button for more than 5 seconds (as indicated in Lesson 6)?
2. Is your computer turning on and off normally now (namely, the computer, not the UPS)?
3. Leave the UPS on for a few hours, then repeat the shutdown process (as instructed in Lesson 6).

If something is not working as it should, please describe detail their actions and results.

Hello Sergey!
Recently, my computer was tidied up with the master and he issued such a remark-information: “Why are you turning off the power? There is also a battery in the BIOS ((he probably meant the battery ??)) is worth it, it can deteriorate ... "
I feed the computer, monitor, speakers (active) through an extension cord for 5 outlets with a switch. I completed the work, everything calmed down, I flipped the switch ... and it becomes so easy on my soul)))) You can sleep peacefully)))
After the completion of the computer, I examined the entire computer "economy", and I see: the mouse is powered; monitor in stand-by, diode glows; the indication on the keyboard lights up; and only the main block is blissful, resting (but I’m not completely sure about this either).
In general, I still continue to disconnect the power from the mains with a switch on the extension cord. And doubts gnaw

Hello Valery!

Indeed, the system unit does not rest when the computer is not disconnected from the network (by a button on the filter or by the UPS button). Inside the system unit there is a standby voltage necessary to control the status of some devices (network card, modem). The power supply itself, of course, is also energized, although it consumes a little.

I myself I always turn off my computer(switch on the extension filter in front of the UPS). Really quieter and nothing flashes 🙂
In addition, in the event of a power failure (lightning, inattentive electrician, etc.), the likelihood of damage to the computer and peripherals is minimal.

At the expense of the battery that powers the BIOS chip: it's not a battery lithium battery type CR2032, its main task is to store settings in a microcircuit, the service life is 3-6 years, it costs less than 1 USD. Why save on it?

Good day, Sergey. I have this problem. Literally 5 days ago I bought a new computer (Quadro AMD FX-4100 (3? 6) / 4Gb / 1Tb / GeForce GTX5500Ti / 1Gb / DVDRW / CR / GLAN / Miditower). and everything was fine exactly until the moment when I turned on one of the “heavy, large-scale” buh (Dragon Age, Aion, etc.). The joy lasted for 40 minutes, after which the computer suddenly began to reboot and in the process turned off completely and for some more time it didn’t turn on in any. and this happens every time you start such games, the rest of the time the computer is perfect. in the store where the computer was bought, they tested it and assured that everything was in order with it. I didn’t believe I gave them a word and gave the computer for diagnostics to another computer salon (independent, so to speak), but even there the check did not reveal anything, no errors, failures, overheating, etc. The specialist who dealt with my computer suggested that the problem was in my home electrical network. what do you advise in this case? is this really a problem? how to solve it? to what kind of uninterruptible power supply (as I understand it, if the problem is electricity, it will need to be purchased?) you need to purchase (is it necessary? and will it help?), what power, etc.? (and, if possible, not very expensive ) I myself, as you probably already understood, do not understand anything about this ... I would be very grateful if you could help me with good advice!

Hello Svetlana!
If the computer restarts and turns off only when running games, then I would check for overheating.

Perhaps the conditions during the test in the computer room were cooler than at home. Is the system unit standing by the battery, are they covered ventilation holes on the side (for example, the lateral vertical surface computer desk or pressed against the sofa), etc.?

Run the program PC wizard(IT lesson 12 and 13), go to " Voltage, Temperature and Fans” and see the temperature immediately after turning it on, and then compare it with a fully loaded processor and video adapter. First of all, check the temperature of the video adapter.
If you make sure nothing gets hotter than 60-70 degrees, only then it will be possible to think about the problem of power supply.

Check, then write me the result, then we will understand in more detail.

Good afternoon,
I have a question similar to the waves on the monitor. Waves appear in the latest toys. And so they are not. If the monitor is disconnected from the UPS and included in the filter, everything disappears immediately, it seems, why do I need it then ?. The system is as follows: 500W power supply. Video, percent, monitor and everything else in total no more than 300W at maximum loads. Uninterruptible such Powercom BNT-1000AP (600W). already changed filters and all that - all the same, if the monitor is direct, then there are no waves.
Thanks in advance.

Hello, Alexander!
Vladimir solved a similar problem (which is described above in the comments) as follows:

“Most likely it’s a ground loop. The ground, in addition to the power wire, also goes through the VGA cable - it turns out a loop where there is too much dirt on the screen of the VGA cable. In the load, power consumption increases, the current flows through the cable is high, and more goes to the ground, which is why interference appears. When I plug it into different sockets, there is no loop, so everything is fine. I see no other reason for this situation.

From all sockets in the surge protector. In our apartments of the former USSR, as a rule, there is no land for ordinary sockets. If there was land, there would be no problems.
I took a tee without earth contacts, connected it to the UPS, and the cable from the monitor to the tee and the problem disappeared.
Now the PC and the Monitor work from the UPS without any problems.

In addition, pay attention to the type of cable used to connect the monitor to the video adapter, if it is a VGA cable, then it is very susceptible to interference and it is better to place it away from the UPS and high-current lines. If possible, it is better to use a DVI cable.

Good evening, Sergey! Thank you for your answer! I did everything as you wrote.
the only change that I made on my own initiative was that I used a different surge protector for the computer itself (+ a different socket), everything else (monitor, speakers, desk lamp etc.) left in the same place. result: almost an hour and a half of the game without reboots.

power-on data

<<>>
>
>> general information
ISA Address: 0x290
Config Mode: 0x290
Support: M5A78L-M LX3
>>Sensor Information
Sensor: ITE IT8712F
Mode: ISA (SuperIO LPC)
PECI Mode: No

>> Chassis Information

ICH Intrusion detected: No
> VIN1: 2.96V
> Voltage +3.3V: 2.66V
> Voltage +5V: 4.57V
> Voltage +12V: 10.75V
> +5V VCCH: 0.46V
> VBAT: 2.21V
>
>> General information
Support: M5A78L-M LX3
> Processor Voltage:
>Voltage: 1.375V
> AMD processor FX: Sensor DTS
> Core 1: 255.9°C
> Core 2: 255.9°C
> Core 3: 255.9°C
> Core 4: 255.9°C
>
>> General information
>Temperature: 29°C
>Temperature (GPU) : 29°C
> Fan: 1020 rpm
> Fan: 30%
>Voltage: 0.950V
>
> HDD ST31000524AS: 22 °C

data obtained during the game

<<>>
> Control chip: ITE IT8712F
>> General information
ISA Address: 0x290
Config Mode: 0x290
Support: M5A78L-M LX3
>>Sensor Information
Sensor: ITE IT8712F
Mode: ISA (SuperIO LPC)
PECI Mode: No
Q-Fan/SmartFan Allowed: No
>> Chassis Information
Sensor Intrusion detected: No
ICH Intrusion detected: No
> VIN1: 2.96V
> Voltage +3.3V: 2.66V
> Voltage +5V: 4.57V
> Voltage +12V: 10.75V
> +5V VCCH: 0.46V
> VBAT: 2.21V
> Control chip: Asus ATK0110
>> General information
Support: M5A78L-M LX3
> Processor Voltage:
>Voltage: 1.288V
> AMD FX Processor: Sensor DTS
> Core 1: 255.9°C
> Core 2: 255.9°C
> Core 3: 255.9°C
> Core 4: 255.9°C
> NVIDIA GeForce GTX 550 Ti: nVidia Driver
>> General information
>Temperature: 56°C
>Temperature (GPU) : 56°C
> Fan: 1050 rpm
> Fan: 30%
>Voltage: 1.075V
> Hard Disk Monitoring: S.M.A.R.T
> HDD ST31000524AS: 35 °C

maybe it was worth playing longer to make sure that there would be no reboot, but ...
can changing the socket and surge protector be the solution to the problem?

It is suspicious that the voltage instead of + 12V is displayed as 10.75 V.

Go into the BIOS and check the readings in it (model system board You did not report, so I can’t name the exact section, you can look in the instructions or go to each section in turn).

Sergey, I'm sorry, it's me again ... nothing foreshadowed trouble ... the games were not launched ... the computer turned off and during the reboot the following appeared:
4079 Mb OK (Installed Memory Size:4096 Mb)
USB Device (S)^: 4 Storage Devices
Auto-Detecting SATA 3G_3///IPE Hard Disk
Auto-Detecting SATA 3G_4 ATAPI CD-ROM
SATA 3G_3: ST 31000524AS JC4B Ultra DMA Mode - 6, S.M.A.R.T. Capable and Status on
SATA 3G_4: ATAPI iHAS122 with XL08 Ultra DMA Mode_5
Auto-Detecting USB Mass Storage Devices…
Device#01: Generetic_SD/MMC*HiSpeep*
Device#02: …Compact*HiSpeep*
Device#03: …SM/XP_Picture*HiSpeep*
Device#04: …MS/MS-Pro*HiSpeep*
04 USB mass storage devices found and configured
Power supply surges detected during the previous power on
ASUS Anti-Surge was triggered to protect system from unstable power supply unit
press F1 to run SETUP
Press F2 to load default values and continue

can you help clarify the situation? please!)

The phrase "Power supply surges detected during the previous power on" is translated "Surges in the supply voltage were detected during the previous power on."
Pressing F1 will take you to BIOS settings, and pressing F2 will reset the BIOS settings and the download will continue.

To prevent the inscription "ASUS Anti-Surge was triggered to protect system from unstable power supply unit" at boot, you can disable the Anti Surge function in the Power section.

But that won't solve the problem.
1. You need to deal with the supply voltages of the power supply (in my previous message, I drew attention to the deviation from + 12V)
2. Do you have lights flashing periodically at home? Do you know how much the voltage in the network differs from the specified 220 Volts?

good evening, Sergey! I hasten to inform you how my misadventures with the new computer ended)
I was on a business trip for a little less than a month, upon returning from which I decided by hook or by crook to achieve justice, a solution to my problem. Once again I gave my computer for diagnostics, once again I was informed that it was in perfect condition. And at that very moment, when one of the employees wanted to turn off my computer (and it worked all this time, they tested it repeatedly) and touched the place on the back panel where the power supply is located, this very employee was shocked (slightly, of course) and the computer began to reboot again , as it happened at home. in general, the problem was, as you expected, in the power supply, something with grounding)!
thank you very much for your advice))) and happy new year to you)

In computer technology, you can often find such intermittent problems.
Happy for you, Svetlana, that such an accident helped solve the problem on the spot 🙂

Sergey, greetings! Your opinion is interesting. The problem is the following: the system unit is powered by a surge protector. The voltage from the socket is 217-220 v. When you turn on the computer while Windows is loading (the moment when the blue squares run), for some reason these squares stop and the download stops. it helps to disconnect the pilot from the power supply and then everything loads normally. what's the problem ???
and the second question: if the UPS has only one output, is it appropriate to use a surge protector at its output as a breed?

Hello Pavel!
Does your computer freeze every time you turn it on? Or maybe only after restoring from hibernation/standby?
Did I understand correctly that the "Reset" button (reset) does not help, only turning off the power helps?

On the UPS side, I would use a regular power strip with multiple outlets (to avoid possible filter circuits interfering with the UPS output circuits). And if we are talking about choosing a UPS, then it is better to immediately buy a model with several outputs in order to avoid unnecessary adapters and extension cords (they potentially reduce electrical and fire safety).
- Yes, the freeze occurs every time you turn it on. To avoid them, you have to turn off the surge protector for a few seconds, after turning on the computer it loads normally. Here is such a primitive (
  - It's hard to pinpoint exactly what the problem is. You need to do a detailed diagnosis.
    First step, I would reset the BIOS settings to make sure they are not the cause. Then try turning off the computer (via the start menu, not the power button), keep the filter on, wait 30 seconds (to stop the rotation of the HDD pancakes), turn on the PC, see if it boots without freezing. Remember the result.
    In the second step, I would check the actual voltage values \u200b\u200bproduced by the power supply (through the BIOS or using the PC Wizard program. It is advisable to check the voltages under different loads (CPU and video adapter). Deviations from standard voltages should be minimal.
    As a third step, I would repeat the situation on clean version OS of the same version (you will have to reinstall Windows or install on a second HDD, if any). This step can be problematic, but it will narrow your search considerably.
    After these steps, it will be possible to draw the first conclusions.

Good evening, Seryozha! I decided not to wait until the warranty on the system unit sealed for 2 years expires and give it to specialists to clean it from dust and change all the coolers to new ones. And immediately change, as you advised, the video card to Geforce 560ti DDR5 bus 256 bit. And at the same time I change the PSU to a more powerful one because of the video card. But I have this question: my UPS is now pulling a computer, without light for 8 minutes. But will it pull when I put this powerful video card and PSU at 750, if it is 425 VA, i.e. 255 watts. I do not want to change the UPS, it is already expensive, 680 UAH or 2518 rubles. What do you advise? Sincerely, Ludmila.

Hello Ludmila.
It's been three months since my analysis to upgrade your computer. The situation on the market for video adapters has changed markedly. The GeForce 5xx was replaced by the 6xx series, which is more economical and less noisy. I advise you to pay attention to it. (If you have questions, it's better in that topic).

For UPS account:
We have already calculated the theoretical power consumption of your PC: new video card(if there is 560 Ti) it will be about 340 watts (at the maximum), and a monitor is also connected to the UPS.
You can take a chance, hoping that during a power outage (or long deviations from the normal voltage in the network), the computer will consume not the maximum possible power, but half ... then the UPS, of course, will survive. Perhaps it will withstand a short-term load and with more power.
But I would not recommend in this case to use a UPS with a power of less than 400-450 watts.
I think it will not be so difficult to sell your used uninterruptible power supply, and thus save on buying a new one.
- Good day, Seryozha! Thank you very much for the advice, I will think about what is more profitable to do. We do not have stores for used components, we will have to look for buyers for the UPS. Without replacing the UPS with a more powerful one, I don’t want to risk a new video card and power supply. If I don’t find a buyer, then it’s better in 1 year 4 months. sell the system unit along with the UPS and buy a new powerful modern gaming PC. I will definitely pay attention to the video card of the sixth series. Sincerely, Lyudmila

Hello Sergey. I have a question. Can the system unit break down due to the fact that it has a UPS? The computer began to reboot many times and eventually stopped working. They said it was from this.

Hello Tamara.
If there is an incompatibility between the UPS and the computer's power supply (this is mentioned in the lesson and comments), then during power surges, the computer will indeed restart. And such a frequent reboot can lead to failure of the PC.
The same can happen if the UPS is defective.
Have you been told what exactly failed inside the system unit?

Sergey, good evening, can you tell me I took a Powercom BNT 800AP usb UPS, connected a system unit to it in one socket, and in the other through a surge protector for the UPS led monitor LG LED E2242C, the system unit works, but the monitor does not. What could be the reason?

Yuri, try swapping the cords (use the one to which the system unit is connected to the monitor).
There is also a marriage, there was even such a thing that the length of the contacts in the connector is incorrect, as a result, the device did not work.

Hello. While everything is clear. Thank you very much for the lesson. Please pay attention to this text. Here one word was repeated twice. (To be smarter like mine 🙂

——— In one of the subsequent IT lessons of the lessons (but at a higher level of preparation) we will look at why this is so and how to avoid this problem. If the question does not tolerate, then contact the comments on this article, I will try to help. ———

word —— *lessons*

about the UPS - a good thing. But I have a laptop

Hello Dear Sergey There is such a problem
The neighbors started a major repair with welding (heating, gratings, a dog aviary, and something else, plus a concrete mixer and other powerful tools, and all this in the private sector) we sit on the same line with them on the second one, we can’t jump over there even worse "VIEW THERE IS AN IRON BUNKER BUILDING THERE AT ALL"
and so from 17-00 to 22-00 I have a disco and sometimes the light just fades out for 5-10 seconds until the “Illich Bulb” mode measured the voltage during the decay for 10 seconds showed on the “Chinese tester” 170 times up to 116 volts and as a result, the computer is cut down, although the TV is standing nearby No changes (apparently there is a different decoupling on the transformer)
There was an option to use Sov stabilizers (for TV), but now the voltage has become even lower and it can’t cope
Today I freaked out and went to the analysis with the neighbors and remembered that My Neighbor (Another) sold the Computer and she still had the UPS, but it was lying before the sale of the company for about a year
His model is bnt 400a (manufacturer not specified) he is 210 watts maximum Connecting it did not give anything
I am an electrician myself, but I have never encountered a UPS before
An autopsy showed that the Fuse on the Charging circuit had burned out (I replaced it), but the battery was dead because it showed 3-5 volts according to measurements. (Gel) didn’t notice But I still launched it with the help of Yulok Power (Laboratory) but he (Block) buzzed at startup, but after switching the circuit to “NETWORK” it stopped
There is an idea to connect to it a battery from a Car for 60 amperes (they say it will help), but it confuses the charge current, it is 0-75 amperes, will the battery plates be destroyed?
Or is it possible to use the UPS as a Stabilizer? ( This function available) and light up the UPS from the Laboratory PSU ???
Replacing the Battery immediately disappears because there is no money at all for the Scholarship and there is nothing to eat ...
Bolshaya Porosba reply to E-mail because I am writing from someone else's computer (I have a disco with drops)

Stanislav, I sympathize with you. I encountered a similar situation when I lived in a private house, I was saved by turning on an autotransformer and a UPS in series.

I have no experience with connecting a car battery to a UPS. Of course, the first thing to check is the compliance of the charging currents and the presence of the required voltage. On the forums, it is often advised to separate the charging and converter circuits. come to the conclusion that the battery will not have time to charge, as a result it will fail.

There are references to working systems "UPS + Car Battery" (example: http://forum.oszone.net/post-1323278-26.html), but before experimenting with connecting a car battery to a UPS, one should take into account the differences in the features of their use: http://www.1000va.ru/actual/?actual_id=10
- Do not be shy. File a complaint (to begin with by phone) with the Electricity Networks Administration and state your grievances. They have to come and sort it out. In the end, as a consumer, you pay money for electricity, which must comply with the requirements of GOST. For connecting the welding transformer to the lighting network in the evening and on weekends, they must insert a wick for homemade.

Good evening, Seryozha! My Imperial line-interactive UPS began to buzz if the plug is in the socket, but it is turned off, a hum is heard. Battery charge 96 percent.

Lyudmila, in fact, the buzz of a UPS that is plugged into the outlet, but turned off by the button, is relatively common. Sometimes this buzz is very faintly audible, sometimes stronger.

If the sound in your case appeared “suddenly”, and is loud enough, then bring it to service center let them figure out what the problem is.

Good day, there was no time and opportunity to contact you Sergey. At first, I also didn’t have grounding and there were problems with the computer and the UPS, everything was decided! Now it works. There were modem failures due to overvoltage, but when, on the advice of one computer engineer, I connected the modem through the UPS, the picture became different, though I had to make a mini socket for connecting on the UPS itself (it's a pity that all the connectors are not intended for the modem's power supply).

Please tell me why the UPS (IPPON for 700 VA) gives short beeps and turns off ??? Connected through a network filter. P.S. There is an electric boiler in the house.

Olga, there can be several reasons.
1. The mains voltage may be out of range for too long (too low or too high);
2. Maybe the battery has reached its end of life and it is time to replace it;
3. The problem may be in the load (in what is connected to the UPS);
4. There is a possibility that the UPS itself is out of order.
And these are not all options.

There is not enough information to suggest more accurately, start by checking the first and third points.

In your house, the wiring does not match the power of the electric boiler. It is necessary to immediately replace the wiring in the house using copper wires in accordance with the maximum power consumption (with a margin) and the soldering of the joints made by twisting. You should also check the quality of the wiring from the meter to the power line (on the pole). Don't take risks.

I read articles with pleasure, I can’t ask any question, just if something is not clear I reread the article and answers to questions from other users. Thank you.

Hello Sergey. When I am not working with the computer, I turn off the UPS. I turn on the uninterruptible first ( APC Back-UPS 700), then electrical appliances connected to it. Sometimes the electric drill turns on normally. There are cases when, when the device is turned on, the uninterruptible unit starts to squeak, while the lights on the connected devices blink dimly. Sometimes squeaking and flashing lasts a couple of seconds, then the devices work normally. Sometimes in appliances, when a beepless device squeaks, an electric crackle is heard. Simply On/Off helps in all situations. Then everything works fine. The described problems appear only at the initial start of the uninterruptible power supply. What is happening? Does it take time for an uninterruptible start to compensate for the lack of power? And the main question: is an uninterruptible power supply capable of harming electrical appliances? All this flickering of light bulbs and electrical crackling disturbs me.

I'm concerned about some of the "network filters" that many people have. They are more like simple extension cords. Having disassembled such a “network filter”, you will not find anything in it that can protect equipment. The maximum that can be on such a sample is a thermal switch and a switch. But there is no interference filtering block at all. I got lucky with my APC. Almost six years, he has served me as reliable. But I decided to buy a new one. Sergei, which one would you recommend? 🙂

Victor, it's really not so simple with filters, and most of them are extension cords.
Even the cost does not always indicate the quality of performance, for example:
The APC PF8VNT3-RS is one of the most expensive, but there have been complaints about build quality in recent years.
APC PH6T3-IT also has controversial solutions, which are written in this review.
Energy Elite Most EHV (but not ER) seems like a good scheme, but there are complaints.
Good feedback about Defender DFS 805 and Defender DFS-PRO5, but I did not find a full-fledged review-testing.
Inexpensive filters with minimum allowable filtration parameters: SVEN Platinum PRO/SVEN Platinum/SVEN Gold (there are complaints about build quality).

In short, I don’t know the ideal filter, I don’t buy the cheapest one with filtration chains, I disassemble it and look at the build quality, if necessary, I fix it or leave it as an extension cord.

For a computer, I consider a UPS to be a mandatory protection.
- Thank you! 🙂 I chose Defender. 😀 And I already have a UPS. APC CS-500. It's just not in working order. Emits beeps and hisses. At the same time, the “on battery” indicator flashes. Even if you disconnect the battery. There is no reaction to the Power button yet.

Hello Sergey! I wanted to describe my “uninterruptible power supply”. I have had it since 2010. I changed the battery after 3 years. Model: Back-UPS ES 525. I like it! Although it was a little expensive at that time, it justifies itself. 3 sockets and one. 3 - from interference and a battery, and one - only from interference. And this one outlet always works even when I'm off. an uninterruptible power supply with a button (I connected a fixed answering machine to this outlet). There is even a wire connection to the COMPUTER. networks and when. And there is also protection for a landline phone in it. In short, a cool uninterruptible power supply - I like it! THANK YOU !!!

Hello Sergey. But will there be any problems if 5-6 electrical appliances are connected to one UPS output through a surge protector (with a plug for connecting to the UPS) (a 20″ monitor, a non-gaming system unit, speakers, a table lamp, an ice TV 40″)?

Hello, Alexander. The main rule is not to exceed the maximum power for which the UPS is designed (or better, leave a margin of 20-30%). Add up the maximum power consumption of each device (usually indicated on the back of a special sticker), and compare with the maximum allowable power of the uninterruptible power supply.

Hello, Sergey! I also ask for advice.
I have a laptop on the table, it was Dell since 2008, now ASUS N56V. I value it. In 2008 I bought a Pover Cube PRO filter, it worked perfectly - I always turn on the laptop in the morning and until night, turn it off only if I leave.
Recently, his toggle switch went bad, I tried to insert it myself -
hissing when turned on. I decided to replace it, I found Pilot GL in Eldorado,
it is 2 times more expensive than Moscow, it seemed to me normal. The store demanded to believe, paid. I was afraid to turn it on at home, but everything is fine, I worked for a week under the same conditions, and yesterday when I turned it on, there was a loud bang, like an explosion, fire and
smoke and turned off the machines for the whole apartment. I was afraid to turn them on, suddenly the filter arranged a short circuit for me and waited for the electrician.
Today I discovered that in other stores this model is more than 2 times more expensive. I don’t know what to think. I read your article and decided to buy a UPS. I have a Defender RJ45 / RJ11 TV, it has 2 free sockets, but I don’t want to load it. By the way, I didn’t understand, does it need to change batteries? He didn’t bother me, although the filters saved me, they turned off the light - the neighbors did a European-style renovation with redevelopment, the noise was incredible, I endured it behind the wall, and others came and turned off all the machines in the shield, including mine. So my surge protectors saved my chill-to, TV and laptop. What would YOU
advised? UPS without any filters? And which? While I have a laptop directly, it was bought, and a month later the model was discontinued, so I don’t know if it has overload protection, etc.

Hello Allah!
The filter that made a short circuit - be sure to return it under warranty.
The batteries in the UPS have to be changed over time, but the service life depends on the quality of the battery and the UPS, available on the website.
The UPS can be used without a filter, but it will not be worse from the filter in front of it.
Regarding recommendations: I have good experience with APC UPS, but recently there have been more complaints, you need to choose a model based on reviews / reviews (do not chase a low price). Good reviews about APC Back-UPS CS 500VA, pay attention to the warranty, it should be 1-2 years.

After about three to six months of operation, the cost of data stored on a new working computer begins to exceed the cost of the computer itself. In the case of a network server, this situation can occur as early as a few weeks after its installation.

In 50 70% of cases, the cause of failures in the operation of electronic devices is poor-quality power supply. In the event of a power failure, one incorrect data write session can destroy the entire file system.

Even if failures do not lead to catastrophic consequences immediately, after a while the sensitive electronic filling of your PC may simply “revolt” due to constant on / off cycles.

In Russia, the data of studies conducted in the United States by Bell Labs and IBM have become known. According to Bell Labs and IBM (USA), each Personal Computer exposed to 120 power outages per month.

Why use a UPS for you

To answer this question, you should think about the following:

What happens if your facility loses power right now?
Have you thought about the harm caused by data corruption or loss?
If you have a universal voice and data network, is all critical equipment protected?
If you have virtualized your servers, have you considered the impact of this on your UPSs?
How much power do your UPS modules consume? What is their efficiency?
How often do you update and maintain your IT equipment (including servers)? What about your UPS?

UPSs are mainly used to protect IT equipment and other loads from problems that reduce power quality. The UPS performs the following main three functions:

Prevents harm caused by power surges and surges. Many UPS models continuously generate the correct output voltage waveform.
Prevents data loss and corruption. Without a UPS, data stored on storage devices that have been improperly shut down can be corrupted or even completely lost. In combination with the appropriate software, the UPS can perform a graceful shutdown of the system.
Ensures the availability of networks and other applications, preventing downtime. UPSs can also be combined with generators to give the generators enough time to start up in the event of a power failure.

9 power problems and how a UPS can solve them

Eaton UPSs are designed to solve all nine major power problems. They are designed to meet the requirements of protection, distribution and power management for offices, local networks, data centers, as well as for telecommunications equipment, medical and industrial markets.

For small office and home (SOHO) applications, Eaton offers budget solutions such as the Ellipse and Eaton 5110 for general desktop applications. To protect critical systems such as network servers and powerful blade servers, Eaton offers line-interactive and online UPSs such as Eaton 5125, 9130, Evolution, EX, MX, MX Frame, 9155, 9355, 9390, 9395 and Blade UPS

Source: EATON CORPORATION. UPS Handbook

Typical Power Supply Problems

Complete power failure(no voltage in the network for more than 40 seconds due to disturbances in the power supply lines)

subsidence(a short-term decrease in the voltage in the network to a value of less than 80% of the nominal value for more than 1 period (1/50 second) is the result of the inclusion of powerful loads, externally manifests itself as flickering of lighting lamps) and bursts (short-term voltage increases in the network by more than 110 % of the nominal for more than 1 period (1/50 second); appear when a large load is turned off, outwardly manifest as flickering of lighting lamps) voltages of different duration (typical for large cities)

High frequency noise radio frequency interference of electromagnetic or other origin, the result of the operation of powerful high-frequency devices, communication devices

Frequency deviation out of limits

High voltage surges short-term voltage impulses up to 6000V and duration up to 10 ms; appear during thunderstorms, as a result of static electricity, due to the sparking of switches, have no external manifestations

Frequency overrun a frequency change of 3 or more Hz from the nominal (50 Hz), appear during unstable operation of the power source, may not appear outwardly.

All these factors can lead to the failure of fairly "thin" electronics, and, as is often the case, to data loss. However, people have long learned to defend themselves: filters mains voltage, "extinguishing" surges, diesel generators that provide power to systems in the event of a power outage on a "global scale", and finally, uninterruptible power supplies the main tool for protecting personal PCs, servers, PBXs, etc.

Types of power failures

Type of power failure	Cause	Possible consequences
Undervoltage, voltage dips	Overloaded network Unstable operation of the mains voltage regulation system Connection of consumers, the total capacity of which is comparable to the total capacity of the electrical network section	Overloading power supplies of electronic devices and reducing their resource Shutdown of equipment when the voltage is insufficient for its operation Failure of electric motors Loss of data in computers
overvoltage	Underloaded network Insufficient operation of the regulation system Shutdown of powerful consumers	Equipment failure Emergency shutdown of equipment with data loss in computers
High voltage impulses	atmospheric electricity Commissioning of a part of the power system after an accident	Failure of power-sensitive equipment
electrical noise	Switching on and off powerful consumers Mutual influence of electrical appliances operating nearby	Program execution and data transfer failures Unstable images on monitor screens and video systems
Complete power off	Overload protection fuses Unprofessional actions of staff Accidents on power lines	Loss of data in computers Failure hard drives on very old computers
Harmonic voltage distortion	The network is dominated by a non-linear load equipped with impulse blocks power supply (computers, communication equipment) Incorrectly designed electrical network operating with non-linear loads Neutral wire overload	Interference with sensitive equipment (radio and television systems, measuring instruments etc.)
Unstable frequency	Strong overload of the power system as a whole Loss of system control	Overheating of transformers Unstable frequency as an indicator of the malfunction of the entire power system or its essential part (for computers, changing the frequency in itself is not a problem)

ANNOUNCEMENTS

UPS stands for "uninterruptible power supply". Abbreviation in English - UPS (Uninterruptible Power Supply) , therefore, the names UPS, UPS, upsnik are also common.

The main function of an uninterruptible power supply is to provide electricity to the equipment connected to it during outages in the main network. But, depending on the type of equipment, the parameters of such an autonomous power supply may be required radically different. Accordingly, the UPS market offers different types of devices that differ in a lot of parameters:

operating principle: offline, line-interactive, online;
type of automatic voltage regulation;
network interference filtering quality;
capacity (the number of ampere-hours, or in other words - how long will it last for battery life);
switching time to batteries during a power outage;
the ability to connect additional external batteries;
various additional functions (filtering sockets, sockets for telephone and network cable, LCD display, PC synchronization), etc.

How to choose a UPS with such a variety of models ? How to understand how they differ? In this article, we will look at the main types of uninterruptible power supplies, their differences, and what additional features manufacturers equip with UPS. In the next one - how to choose a UPS depending on the characteristics of your equipment, how to calculate its required power, etc.

Three main types of UPS

Off-line (Back-UPS, standby, standby) uninterruptible power supply

Redundant UPS Example: Model .

The principle of operation of this type of uninterruptible power supply is very simple:

As long as there is power on the grid within the set values, the UPS supplies power to the connected devices directly from the grid, simultaneously recharging the battery. The power passing through the UPS is not regulated, the filtering of pulses and noise occurs at the simplest level, using passive filters. The waveform corresponds to the mains signal, i.e. sinusoid.

As soon as the mains power fails, the UPS switches to battery power. Inverter converting D.C. from battery to alternating current at the output, this type of UPS has one of the simplest, so the waveform does not correspond to the correct sinusoid. The maximum that manufacturers are doing is bringing it closer to a sinusoid, making it stepped.

The UPS also switches to off-line autonomous power supply if the voltage level in the network drops below or rises above the threshold values, they may be different depending on the brand of uninterruptible power supply.

The switching time to batteries in various models ranges from 5 to 20 ms. This is relatively high, and for some models of equipment, such a long delay can adversely affect performance. . Long-term operation of the relay is due to the fact that the device needs the phases of the mains and battery voltages to match at the moment the autonomous power is turned on, and since they are not synchronized, this takes some time.

Scheme of operation of an uninterruptible power supply of a backup type.

Advantages of Standby UPS:

inexpensive price,
high efficiency,
silent operation.

Flaws:

long switching to battery operation (from 5 to 20 ms);
the form of the output signal is not a sinusoid;
filtering interference, noise and pulseson the line is quite rough;
there is no voltage and frequency adjustment when working from the network.

Line Interactive UPS

Line Interactive UPS Example: Model

This type of uninterruptible power supply is most often chosen by buyers, as it optimally combines functionality and price.

AT circuit diagram operation of linear-interactive UPS included AVR - a module for automatic adjustment of the incoming mains voltage. That is, unlike a backup type UPS, it not only passes power through itself, but also stabilizes it, though not smoothly, but in steps.

When operating from the mains at normal voltage levels, the line interactive uninterruptible power supply passes the incoming signal through passive filters of interference and noise, while the battery is charging.

When the voltage in the network rises or falls, the line-interactive UPS makes its stepwise adjustment. When the voltage reaches a certain threshold, the AVR lowers or lowers it by a fixed amount (or percentage). There can be several such threshold-steps in the AVR operation scheme, and a different number of correction steps can be used to work with a lowered and increased level (for example, 2 - for increasing, and 1 - for decreasing).

If the mains voltage drops or rises to values that lie outside the available input range of the UPS, the device switches to battery operation, just as in the event of a complete power outage. These minimums and maximums may vary depending on how busy the UPS is. For example, if the UPS is 70% loaded, and the voltmeter shows 160V in the network, the uninterruptible power supply switches to batteries. And at 30% load and a voltage of 150V, it still regulates with the help of an AVR transformer.

Some of the linear-interactive models do not differ in the form of the output signal from the uninterruptible backup type: they have a stepped sinusoid. Some manufacturers, especially with the growing demand for UPS for boilers, equip their uninterruptible power supplies with inverters that produce the correct sine wave.

Switchover time to battery operation in pure sine wave line-interactive UPSs is faster than that of its standby counterparts. The reason is that in UPSs of this type, the voltage curve shapes coincide (both from the mains and from the battery it is a sinusoid), which speeds up the phase synchronization and, accordingly, the launch of an autonomous power supply.

Advantages of line-interactive UPS:

reasonable price,
silent operation
automatic adjustment of the input voltage,
in some models - a pure sine wave at the output,
switching time is less than in standby ones (on average 4-8 ms, in some models 2-4 ms).

Flaws:

no frequency control
insufficiently complete filtering of interference, noise and impulses of the network,
voltage regulation is not smooth, but stepwise,
The efficiency is lower than in an off-line uninterruptible power supply.

Double conversion UPS (on-line)

Double Conversion UPS Example: Model .

This is the most expensive, but also the best type of UPS. It is optimally suited for expensive, capricious equipment, where not only constant voltage is important, but also frequency, as well as effective noise filtering, a pure sine wave signal and no delays when switching to battery operation.

In fact, such an uninterruptible power supply works constantly, stabilizing, filtering the incoming signal, equalizing the frequency and shape of the output signal.

In mains mode, the incoming AC voltage is stabilized and converted to DC by the rectifier and distributed between the battery (for recharging if necessary) and the inverter. The inverter converts direct current into alternating current, giving out a signal in the form of a pure sine wave, the correct frequency, the correct voltage. Interference and noise are completely absent - they simply do not remain after double conversion.

Such a constant "inclusion" of an uninterruptible power supply in the network gives one of its significant advantages: instant switch to battery operation. Actually, it's even difficult to call it "switching", since the power passes through the rectifier, the battery (during charging) and the inverter all the time. At the moment the voltage in the network drops below the threshold values or a complete power outage, the inverter simply starts to take part of the energy from the battery, and not from the rectifier. It happens instantly.

Double conversion UPSs usually have one more mode of operation: bypass. This is a redundant line that goes directly from the input to the output of the UPS, bypassing the rectifier, battery and inverter. It allows at critical moments for the UPS: overload (for example, by starting currents), failure of the inverter and others - to supply electricity to the connected devices directly, avoiding failure of the device elements.

The constant operation of the UPS has a certain disadvantage: increased heat dissipation, which requires efficient cooling. Therefore, UPS online are most often equipped with fans, which makes their operation in residential areas not as comfortable as other types of silent uninterruptible power supplies.

Advantages of online UPS:

constant voltage stabilization,
constant frequency stabilization,
pure sine wave output
effective filtering of noise, pulses and interference,
instant switch to batteries.

Flaws:

high price,
increased noise level
the lowest efficiency among all types of UPS.

When choosing an uninterruptible power supply, you need to consider that there are exceptions. Some line-interactive UPSs may cost more than online models from another manufacturer, the transfer time to battery operation in a standby UPS may be no more, or even less than some line-interactive UPS, etc. Therefore, in In any case, please read the specs. specific model.

Additional UPS functionality

In addition to determining the type of uninterruptible power supply that you need, when choosing a UPS, you should also pay attention to what functionality is included in it. UPS may have various additional features and design features:

Synchronization with PC. This feature is present in not the cheapest models, but it is very convenient. With the help of a special software The UPS is transmitting data to real mode to the computer about the state of the power line, the level of battery charge. In addition to the purely informational component, there are also such opportunities as, for example, autonomous shutdown computer with saving data in all applications during a power outage.

Cold start. An uninterruptible power supply equipped with this function can be turned on in the absence of electricity in the network. For example, the lights went out, you saved documents, turned off the computer and UPS, but after a while there was an urgent need to copy the document to a USB flash drive. A cold-start UPS can be turned on even if there is still no power in the network and get the job done.

Previously, the connectors for connecting devices in an uninterruptible power supply looked basically like this:

This IEC 320 connector is great for connecting various computer equipment. However, equipment with a conventional power cord, the same wifi router, do not connect to it. For these purposes, you can use a surge protector with a similar connector that is connected to the UPS, and already include various equipment in it. But this is not always convenient.

Therefore, now many models have simply been supplemented with Schuko-type sockets (we often call them euro sockets), so that the equipment can be turned on directly:

Sockets for noise filtering. The UPS may be equipped with an outlet or multiple outlets for sensitive equipment that do not provide power during a power outage but protect connected equipment from mains interference.

Sockets for telephone line, twisted pair. High-voltage impulses can be transmitted not only directly through an electric power cable, but also in the event of various accidents and breakdowns - both over a telephone cable and over twisted pair. To protect telephone, network and computer equipment, some manufacturers provide special connectors (input / output) where you can connect a telephone or Internet line.

Continued in the next article.

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Poor power supply is one of the main problems of failure of household, office or industrial equipment. Although the interference that occurs in the electrical network is periodic, they have a detrimental effect on the components of modern electronic devices that are connected to the outlet. To protect critically necessary equipment or saving data in the event of a power failure, uninterruptible power supplies are most commonly used.

The main schemes of work and scope of uninterruptible power supplies

The purpose of the UPS is to ensure the correct operation of the load during sudden "dips" or "surges" of voltage, as well as to ensure short-term autonomous operation of the connected equipment during a complete power outage. Modern uninterruptible devices are divided into three classes:

Backup or Offline
Line Interactive
With double energy conversion

Their design and functionality are somewhat different, but everyone can figure out how to use an uninterruptible power supply.

What is a redundant UPS for? The main scope of its application is the protection of household computer and multimedia equipment. The scheme of its operation is extremely simple: in normal mode, the load is powered from the mains, and when the voltage disappears in it, the device switches to battery operation. The switching time between types of operation is non-zero. It is relatively inexpensive and will protect the equipment from minor power surges and short-term power failures.

The advantages of a line-interactive UPS are smoother signal stabilization and the ability to operate over a wide range of input voltages. Such devices do not allow you to adjust the signal frequency when powered from the mains, while in the battery-powered mode they can produce a “pure” or approximated sine wave. How can I use the Line-Interactive uninterruptible power supply? It is great for protecting monitors, system units, LAN nodes, workstations, computer peripherals and other devices with switching power supplies, which makes it excellent.

The most advanced in terms of equipment protection is the double conversion UPS. But what is valuable in an uninterruptible service developed according to the Online scheme? It is characterized by instantaneous switching between operating modes and independence of the signal parameters at the output from the parameters at the UPS input. Therefore, this type of UPS is designed for switching equipment, especially demanding on the quality of the power supply. Among online topology uninterruptible power supplies, based on their scope, the following types can be distinguished:

Alternative protective equipment options

Many people ask themselves: is an uninterruptible power supply needed if the voltage in the network does not disappear, but simply “jumps”? Do I need an uninterruptible power supply for a computer in this case? The answer to these questions can be a look in the direction of voltage stabilizers. These devices allow you to correct the signal in a very wide range, applying a voltage to the load input at a level that was specified by the user. This is the main advantage of these devices. The main disadvantage is that the stabilizer stops working simultaneously with the disappearance of voltage in the mains. The main problem of stabilization devices is the inability to provide autonomous operation of the load. Therefore, it is important to clearly understand what exactly it is necessary to protect the equipment from: from signal level fluctuations or from frequent and short-term power outages. In the first case, a voltage stabilizer will be the way out of the situation, in the second case, an uninterruptible power supply, the purpose of which is somewhat more extensive.

But what if the signal level in the power grid is relatively stable, but there are long power outages? The way out of this situation can be the purchase of a diesel generator. They are produced with different power ranges and can be used to service both domestic and industrial facilities. There are diesel and petrol models. The starter of the device can be either manual or electric. The advantage of using such an installation is that it can provide a long battery life of the equipment with breaks only for service or refueling. This technique is compact, easy to maintain and easy to operate.

The operation of the DGU is not without a number of disadvantages, these include:

The impossibility of self-transition to load power in the event of a power failure in the power supply network;
Noise during operation;
The presence of exhaust gases;
A large number of Supplies(candles, fuel, etc.)

Integrated solutions for the protection of electronic equipment

To provide maximum protection telecommunications, server or industrial equipment using one type of device may not be enough. Therefore, the most optimal solution may be their combination. For example, a UPS for emergency lighting will not provide the proper level of autonomy. This problem is solved by serially connecting an uninterruptible power supply unit and a diesel generator set. Why do you need an uninterruptible power supply in such a scheme? To filter the voltage and ensure the autonomy of the system until the generator starts and enters the operating mode.

Why and how can you use an uninterruptible power supply paired with a voltage stabilizer? For the correct operation of equipment in sections of the power grid where frequent voltage drops are observed, which are not accompanied by a complete shutdown. Due to this, a significant reduction in the cost of the design can be achieved: an inexpensive stabilization device will provide effective signal correction, and a mid-range UPS will achieve an acceptable level of autonomy.

Just about the complex. Programs. Iron. Internet. Windows

Why do you need UPS. What is an uninterruptible power supply and how to choose one? How to use an uninterruptible power supply

So what does the UPS protect against?

How long can a "bespereboynik" be able to work on battery power?

Why do many UPSs have telephone (RJ-11) and network (RJ-45) sockets?

UPS selection

UPS and computer power supply compatibility

Connecting the surge protector and UPS

Summarize

Video supplement

Share with friends:

Why use a UPS for you

9 power problems and how a UPS can solve them

Typical Power Supply Problems

Types of power failures

ANNOUNCEMENTS

Three main types of UPS

Off-line (Back-UPS, standby, standby) uninterruptible power supply

Line Interactive UPS

Double conversion UPS (on-line)

Additional UPS functionality

The main schemes of work and scope of uninterruptible power supplies

Alternative protective equipment options

Integrated solutions for the protection of electronic equipment