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What is a UPS and how does it work? Hey Engineering Lovers, imagine a scene that has happened to me a dozen times. I was doing school work as a teenager, and out of nowhere, the energy went out.

Nowadays it is more difficult for you to lose your work, as the use of notebooks is much more widespread, and as the notebook has an internal battery, unless the battery is discharged, you will not lose your work. But in the past, this was a real fear and the automatic save option was something well explored. And to put an end to this fear, you could purchase a UPS.

But what is this UPS? Come on, a UPS, or UPS, or uninterruptible power supply system, is an electrical device designed to provide emergency power to a load when the input power supply fails. It should not be confused with a generator, but rather as a device that provides almost instantaneous protection against grid power outages via the battery for a short period of time.

It ends up being a bridge between returning power from the grid or a backup power system like a generator. But why do I need a UPS? I can just use a direct generator, no?

Well, the whole point is that many electrical and electronic devices have oscillation-sensitive systems. For example, a computer uses 127 or 220 volt alternating current energy oscillating at 60 Hertz. However, it is a system that is very sensitive to sudden changes, and if there is a sudden fluctuation in both voltage and frequency, this can lead to a failure in the power supply system and even burn the computer.

And that's why we use UPS. Its functionality goes beyond just a power backup, but it can serve a number of other critical functions. For example, it protects electronic equipment in moments when the voltage on the line is higher than it should be, known as Voltage Surges or Peaks.

Some UPS units can normalize undervoltages and overvoltages, which ensures optimal operation and even preserves battery life in the event of more serious power failures, known as brownouts. If a line goes down or a fuse blows somewhere on the grid or in your home, a UPS can seamlessly transition to battery operation to ensure all devices remain operational and flicker-free. The most advanced UPS systems can communicate with any number of connected devices, allowing for automated shutdown procedures.

In other words, it can recognize which devices used are most critical, and turn off others that do not need to be powered. For example, in some smart UPS systems, it can talk to a computer's management system, and activate power saving mode until grid power is restored. In other words, it is not just a little box with a battery, but it is used for several other functions that go beyond just supplying electricity when the power runs out.

But are UPSs all the same? Is there a difference or does anyone answer me? In fact, there are differences between UPSs, and there are even many options.

There are the standby UPS, the in-line interactive UPS, the double conversion UPS, and a wide variety of specialized variants. Choosing the right one involves a comprehensive understanding of your specific needs, combined with a modest knowledge of the UPS system. To understand better, let's take a look at these types of UPS systems.

A stand-by UPS is the most common model we have on the market, and it is what keeps the device connected to the normal electrical network, until a problem is detected, and thus, it activates its battery reserve. When this problem occurs, it activates a power inverter in a very quick interval, of around 5 milliseconds or even less, and starts supplying energy through its battery. This type has features like basic surge protection and battery backup functionality and they are the most commonly used for home use and even small businesses because they tend to cost about half the price of industrial alternatives.

The interactive line UPS is more sophisticated and generally reserved for small and medium-sized companies. These devices are designed to handle a wide range of power issues, including voltage sags and spikes, without the need to switch to battery power. In other words, it already has the ability to correct small power fluctuations through a multitap variable voltage autotransformer.

This is because undervoltage or overvoltage problems often do not cause the network power to run out, but end up generating consequences for sensitive equipment. So this type of UPS works by regulating the output voltage so that these problems do not continue down the line. They are widely used on company servers, because they can manage network fluctuations well, without causing damage to the servers.

For many, they strike the perfect balance between cost and performance and tend to be most efficient in environments where power fluctuations occur frequently. Double conversion UPS offers the highest level of power protection. This is done by completely isolating connected equipment from raw energy sources.

Often called continuous UPSs, they simply receive alternating current energy from the grid, convert this energy into direct current to supply a bank of batteries and then convert this energy into direct current from the battery into alternating current again. In other words, the entire system is connected directly to batteries, and the grid power only works to charge the batteries. This means that the power supply at the UPS output is fully controlled, consistent and uninterrupted, regardless of fluctuations and failures.

The result is an environment completely isolated from power anomalies, ideal in environments that manage highly confidential data and critical equipment. They are most commonly used in data centers, medical facilities, and telecommunications infrastructure, although they are generally recommended for the operation of all sensitive equipment, such as those used in industrial environments. But interestingly, these uninterruptible power systems are indispensable tools, ensuring incalculable reliability and protecting the integrity of essential electrical equipment.

Whether for use at home, in the office or in large-scale data centers, UPSs end up providing a critical layer of protection for sensitive electronic equipment. And if you've ever lost a file on your computer because the power went out and you forgot to save it, you know how this device saves a lot. If you've made it this far and liked the video, take the opportunity to subscribe.

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So, have you ever lost any work or information due to a lack of power? Do you have a UPS at home? Leave it here in the comments and I want to know.

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