Uninterruptible power supply unit for a heating boiler: principle of operation + subtleties of choosing uninterruptible power supplies

UPS usage rules

By purchasing an uninterruptible to organize backup power, you need to understand what devices it can be used with. Sometimes it is impossible to get by with only a UPS, and then you need to take additional measures to provide the house with electricity.

Connecting household appliances

Computers, modems, routers, video and audio equipment are typical home or office devices to which uninterruptible power supplies are connected. If this technique contains ordinary switching power supplies, then it will be enough to purchase relatively cheap models that do not produce a pure sine wave.

Modern models are compact and have an attractive design that blends harmoniously with other appliances in the interior of the living room.

For lighting, you also do not need to purchase expensive products. The main thing here is to correctly calculate the maximum power and battery life.

With frequent shutdowns, the problem of unplanned defrosting of refrigerators and food spoilage is relevant. When protecting such equipment with asynchronous motors, a UPS of a more complex device will be needed, since a “clean” sine wave signal is required.

In addition, it is necessary to take into account the presence of starting currents that occur when starting the engine. Simplified for refrigeration equipment, their value can be determined by multiplying the power value by 5.

If, for example, the kitchen has a refrigerator with a total power of 300 W (at start-up - 1500 W) and a freezer with 200 W (at start-up - 1000 W), then a pure sine wave power supply with a maximum power of at least 1700 W is needed. This value is obtained for the case when the freezer will work, and at this time the refrigerator will turn on. Simultaneous start of both motors is unlikely, and such a UPS will withstand a one-second surge of 2.7 kW.

An online-type block with a maximum power of 2000 W will be able to work for about half an hour with a total consumption of 500 W. Since the cooling mode takes about 5 minutes, the uninterruptible power supply is guaranteed to be enough for 6 starts of both devices.

In private houses and cottages, it is also important to use a UPS to support a forced circulation heating system. Pumps also need pure sine

Uninterruptibles are also actively used for the operation of gas heating boilers. Considering the cost of the connected equipment, you should not save on the quality of the UPS in this case.

Backup and additional power supply

For many household appliances, it is impossible to find an inexpensive UPS, as significant maximum power will be required for a long battery life. Washing machines, electric ovens, distributed air conditioning systems consume a lot of electricity.

You can, of course, do without these devices during a power outage. This is useful if such interruptions occur infrequently and for a short time. But if, nevertheless, a decision is made to provide powerful consumers with autonomous power, then it is better to use a gasoline or diesel generator. For their quick start in the absence of voltage, an automatic transfer system (ATS) is used.

If you have an additional power source, the UPS is still worth using, at least for computers. Instant start of the generator and restoration of power supply cannot be achieved.

Undervoltage stabilization

The problem of low voltage is relevant for facilities connected to old or low-power electrical networks. If this situation occurs constantly, then it is better to use an input regulator.

In the presence of a stabilizer, the voltage of the intra-house network will be brought to standard values. This will also affect devices that are not connected to the UPS.

With a reduced voltage, the strength of the current passing through the intra-house network increases. For example, let the total power of consumers connected to the UPS be 1.5 kW, and the supplied voltage is 190 V.

Then according to Ohm's law:

• I₁ \u003d 1500 / 190 \u003d 7.9 A - current in the circuit to the UPS without a stabilizer;
• I₂ \u003d 1500 / 220 \u003d 6.8 A - the current in the circuit to the UPS with a stabilizer.

Thus, an intra-house network without a stabilizer will experience an increased load, which could not be taken into account when choosing the wiring section.

Therefore, with a constant low voltage, it is better to install a stabilizer. In this case, the load on the UPS autotransformer will be less, which will extend its service life. In addition, taking into account the alignment of the voltage, you can purchase cheaper uninterruptible power supplies.

UPS requirements for gas boilers and their characteristics

When choosing a UPS for a boiler, you should familiarize yourself with their varieties. They are represented by two main types - these are offline and online UPS. Offline systems are the simplest uninterruptible power devices. They do not know how to stabilize the voltage, switching to batteries only when the voltage drops below a certain value - only in this case a stable 220 V appears at the output (the rest of the time, the UPS works as if in bypass mode).

Choose a UPS with a smooth sine wave, this will contribute to a more stable operation of your heating equipment.

The UPS for the online type boiler performs double conversion of electricity. First, 220 V AC is converted to 12 or 24 V DC. Then the direct current is again converted into alternating current - with a voltage of 220 V and a frequency of 50 Hz.In order to reduce losses, high-efficiency inverter converters are used in their design.

Thus, a UPS for a boiler is not always a stabilizer, while heating equipment likes a stable voltage. It also likes when the output is a pure sine wave, and not its rectangular counterpart (a square wave or a stepped approximation of a sine wave). By the way, cheap computer UPSs with a small capacity battery give a stepped sinusoid shape. Therefore, they are not suitable for powering gas boilers.

An uninterruptible power supply for the boiler, represented by a computer UPS, is also not suitable because the battery capacity is extremely small here - the reserve is enough for 10-30 minutes of operation.

Now we will look at battery requirements. When you come to the store to choose a good UPS for a gas boiler, do not forget to purchase a model with a plug-in type battery - it must be external, not built-in. The thing is that external batteries have a higher capacity, up to several hundred Ah. They have impressive dimensions, so they are not built into the equipment, but stand next to it.

Let's see how to choose a UPS for a gas boiler, focusing on the maximum battery life. Considering that accidents on the lines today are eliminated very quickly, and the maximum time for preventive maintenance is no more than one working day, then 6-8 hours of battery life is enough for us. In order to calculate how long an uninterruptible power supply will work for gas boiler for fully charged, we need the following data:

• Battery capacity in ampere/hours;
• Battery voltage (can be 12 or 24 V);
• Load (indicated in the passport for the gas boiler).

Let's try to calculate how long the uninterruptible power supply for the boiler will work with a power consumption of 170 W from a battery with a capacity of 75 A / h and a voltage of 12 V. To do this, we multiply the voltage by the current and divide by the power - (75x12) / 170. It turns out that the gas boiler will be able to work from the selected UPS for more than 5 hours. And if we take into account the fact that the equipment operates in a cyclic mode (not constantly), then we can count on 6-7 hours of continuous power.

Table for selecting the battery capacity of an uninterrupted battery, depending on the power of the boiler.

When using low-power gas boilers and two batteries with a capacity of 100 A / h each and a voltage of 12 V, the battery life will be about 13-14 hours.

When planning to buy an uninterruptible power supply for a boiler, you need to pay attention to such a characteristic as charging current. The thing is that it should be 10-12% of the battery capacity

For example, if the battery has a capacity of 100 A / h, then the charge current should be 10%. If this indicator is less or more, then the battery will last less than it should.

Maintenance-free batteries can be charged at lower currents, but the time for a full charge will be quite long.

Continuous

Uninterruptibles of continuous type (on-line) provide stable voltage and current at the output, regardless of the quality of the incoming electricity. The operation of the equipment when using continuous UPS is always provided by the battery.

It's all about the special principle of operation of such devices:

• The voltage supplied to the UPS decreases, the AC is rectified, as a result of which the battery of the device is charged;
• The further supply of electricity occurs according to the reverse principle - the current is again converted into alternating current, the voltage increases and exits the uninterruptible power supply.

Thanks to this principle of operation, it is possible to achieve stable operation of heating equipment. Any changes in voltage when using continuous UPS will not affect the operation of the boiler. In addition, the presence of an uninterruptible power supply provides reliable protection of the boiler itself from damage.

The advantages of a continuous type UPS are obvious:

• The equipment connected to the device continues to operate normally even when the power is turned off;
• The characteristics of the electricity entering the device are stabilized, and the boiler does not feel any frequency and voltage fluctuations at all;
• Heating equipment is reliably protected from damage caused by a sharp increase in voltage;
• Output voltage characteristics can be adjusted;
• If necessary, a continuous UPS can be connected to a generator to restore energy to the batteries.

Among the shortcomings, one can only note a decrease in efficiency, the presence of noise and heat emissions due to a running fan, as well as high cost.

Selection options and types of UPS

The correct choice of power source largely depends on the parameters of the boiler. In order for the UPS to meet the required parameters as accurately as possible, the following factors must be considered:

• Nominal and starting electrical power of the boiler. To determine this parameter, it is necessary to study the equipment passport.It should be noted that when starting the entire system, a starting current must be supplied, the value of which is 2.5-3 times greater than normal. To a greater extent, this applies to circular pumps, as they are the main consumers of energy in boilers. i.e. if the pump power is 200 watts, then the UPS must supply at least 600 watts to the system.
• The shape of the output voltage. Due to the design feature of the gas boiler, a sinusoidal voltage must be applied at the input. UPS with square wave output voltage are not suitable for boilers. When they work together, extraneous noise may appear in the pump - buzzing.

Currently, there are 2 types of uninterruptible power supplies that can be connected to heating boilers:

Standby (off-line) scheme

This is the simplest design of an uninterruptible power supply. Connected to the boiler and the mains, the device passes voltage through itself without changing its parameters. In the event that the indicators go beyond the norm (decrease), an automatic unit is turned on, which converts the constant low-voltage voltage from the batteries into the required 220 V.

Advantages:

• Simplicity of design, resulting in a relatively low price.
• In transmission mode, it consumes a small amount of electricity.

Flaws:

• There are no mechanisms for damping power surges.
• When switching from standby to operating mode, there is some time delay that may affect the operation of the boiler - automatic shutdown.

Line-interactive scheme

To solve the problem of normalizing the mains voltage, interactive UPSs are produced, the design of which, in addition to inverters, includes a stabilizing unit.The principle of operation of the stabilizer may be to use an autotransformer operating on a relay circuit or using a servo servo.

The advantages of this type of device lies not only in the supply of energy in the event of a shutdown of the main source, but also in the protection of the electronic component of the boiler from power surges.

When choosing a UPS, you should also consider its battery life. Many devices require an external battery connection. Their number depends on the power consumption of the boiler and the operating time without the use of a permanent power supply.

Manufacturers, prices

Many manufacturers of electronic equipment are engaged in the production of uninterruptible power supplies for boilers. Among them, it is worth highlighting the following companies and models.

Ariana

This manufacturer offers several UPS models that differ in functionality and technical parameters.

AK-500. line-interactive. The scheme of this block allows the boiler to be powered both from the network and from autonomous sources (batteries, diesel generators, etc.).

Specifications:

1. Load power - 500 watts.
2. The input voltage is up to 300 V.
3. Input voltage from external power sources - 14 V.

The cost of AK-500 ~ 6800 rubles.

General Electric

The products of this American company are distinguished by the best parameters for fine-tuning the operation of the UPS to stabilize the voltage. This is necessary for boilers with sensitive electronics. For small and medium power heaters, the best choice is the model: EP 700 LRT.

The design of this model has a double converter - for voltage and signal frequency. This allows you to completely protect the boiler from unforeseen surges in the power grid.

Specifications:

1. Load power - 490 watts.
2. The input voltage is up to 300 V.
3. Input voltage from external power sources - 14 V.
4. Output voltage - 220/230/240V±2%

The cost of this model is ~ 13,200 rubles.

The above devices are among the most popular and popular UPS on the market. But besides them, there are also other manufacturers - Rucelf, Luxeon, Vir-Electrik, etc. The choice of this equipment should be based on indicators of quality, degree of functionality and cost of the device.

As for another important component for the boiler - thermostat. then read about it here.

Backup time calculation

The battery life of a UPS with external batteries is determined solely by the total capacity of all batteries connected to the system. In this case, the energy of their charge is converted into an alternating voltage of 220 volts. Since the inverter itself (like all electronic devices) has internal losses, it is necessary to take them into account in advance in the form of an efficiency other than 100%. When determining the desired indicator, it is taken into account that the batteries are also not ideal and do not “give out” all the energy stored in them during operation. In this case, it will be necessary to take into account the availability factor of the batteries included in the uninterruptible power supply.

Given these two indicators, the formula for calculating the desired time period takes the following form:

T = E x U / P x KPD x KDE (in hours), where

• E is the total capacity of connected batteries,
• U is the operating voltage of the battery,
• P is the active power in the load.

The coefficient for the KPD inverter is close to 0.8, and the same indicator for the battery (KDE) is approximately 0.9.They are not fixed values ​​and depend on a number of operational factors: the amount of energy consumption, as well as the temperature and humidity of the air.

As an example, several options for calculating the battery life of the Shtil uninterruptible power supply are presented. With an initial voltage of 12 Volts and a total capacity of 60 Ah, the UPS is used for a wall-mounted heating boiler with a declared power of 150 watts. In this situation, the time of its independent operation is obtained: T = 60 x 12 / 150 x 0.8 x 0.9 = 3.5 hours.

When considering the option with a battery capacity of 150 Amp-hours, this indicator for a boiler with the same energy costs will be: T \u003d 150 x 12 / 150 x 0.8 x 0.9 \u003d 8.6 hours.

If there are two batteries with the same capacity, the time of its operation in the absence of voltage in the network will be equal to: T = 2 x 150 x 12 / 150 x 0.8 x 0.9 = 17.2 hours.

The above calculation method is suitable for any range of UPSs, including common Baxi, Bosch, Vaillant and Buderus models.

How to choose a UPS for a gas boiler?

Power calculation

The power consumed by the gas boiler is the sum of the power consumption of the electronics unit, the power of the pump and the cooling fan (if any). In this case, only the thermal power in watts can be indicated in the passport of the unit.

UPS power for boilers is calculated by the formula: A=B/C*D, where:

• A is the power of the backup power supply;
• B is the nameplate power of the equipment in watts;
• C - coefficient 0.7 for reactive load;
• D - three times the margin for starting current.

UPS battery selection

For backup power devices, batteries of various capacities are provided.On some devices, as mentioned above, you can connect an external battery, which allows you to work longer in emergency mode. The larger the battery capacity, the longer the gas boiler will be able to work without electricity. Accordingly, with an increase in capacity, the price of the device also increases.

If an external battery can be connected to the UPS, it is important to know the maximum charge current indicated in the documentation. We multiply this figure by 10 - and we get the capacity of the battery that can be charged from this device

UPS runtime can be calculated using a simple formula. We multiply the capacity of the battery by its voltage, and divide the result by the full power of the load. For example, if the device uses a 12V battery with a capacity of 75 Ah, and the total power of all equipment is 200 W, then the battery life will be 4.5 hours: 75*12/200 = 4.5.

Batteries can be connected in series or in parallel. In the first case, the capacitance of the device does not change, but the voltage adds up. In the second case, the opposite is true.

If you decide to use car batteries with the UPS to save money, immediately abandon this idea. In the event of an incorrect connection, the uninterruptible power supply will fail, and under warranty (even if it is still valid), no one will change it for you.

It's no secret that batteries get hot during operation. Therefore, it is not necessary to heat them additionally against each other. When connecting several such devices, make sure that there is an air gap between them. Also, do not keep batteries near heat sources (like heaters) or at very low temperatures - this will lead to their rapid discharge.

Installation location

Uninterruptibles for gas boilers should be installed indoors next to the heating system. Like batteries, the UPS itself does not like extreme heat or cold, so you need to create optimal conditions (room temperature) in the room for it to work.

The device is best placed near outlets. If the device is small, you can not hang it on the wall, but simply put it on a shelf. At the same time, the ventilation openings must remain open.

The minimum distance from gas pipes to sockets, including the UPS, must be at least 0.5 meters.

Do I need a stabilizer if there is a UPS

An uninterruptible power supply is a useful and functional device, but it will not be a salvation from all troubles if the quality of the input voltage is poor in the house. Not all UPS models are able to "pull out" low voltage (less than 170-180 V).

If your home really has serious and persistent problems with the input voltage (it is less than 200 V), you still have to install a normal inverter regulator at the input. Otherwise, the gas boiler will be powered only by batteries, which will take away a significant part of their operating life.

UPS types

There are dozens of manufacturers on the market that produce uninterruptible power supplies for various price segments. However, in budget models, functionality and battery life are many times inferior to expensive devices.

According to the principle of operation, the equipment is divided into 3 categories:

• Reserved (offline);
• Continuous (online);
• Line interactive.

Now in detail about each group.

Reserve

If there is electricity in the network, then this option acts as an intermediary.

As soon as the power is turned off, the UPS automatically transfers the connected device to battery power.

Such models are equipped with batteries with a capacity of 5 to 10 Ah, which is sufficient for correct operation for half an hour. The main function of this device is to prevent the instantaneous stop of the heater and give enough time to the user to properly turn off the gas boiler.

The advantages of such a solution include:

• Noiselessness;
• High efficiency if the power is supplied through the electrical network;
• Price.

However, redundant UPSs have a number of disadvantages:

• Long switching time, on average 6-12 ms;
• The user cannot change the characteristics of voltage and current;
• Small capacity.

Most devices of this type support the installation of an additional external power supply. Therefore, the battery life is greatly increased. However, this model will remain a power switch, you can not demand more from it.

Continuous

This type works regardless of the output parameters of the network. The gas boiler is powered by battery power. In many ways, this became possible due to the two-stage conversion of electrical energy.

The voltage from the network is fed to the input of the uninterruptible power supply. Here it decreases, and the alternating current is rectified. Due to this, the battery is recharged.

With the return of electricity, the process is carried out as follows. The current is converted to AC, and the voltage increases, after which it moves to the UPS output.

As a result, the device works properly when the electricity is turned off.Also, unexpected power surges or distortion of the sinusoid will not cause a negative effect on the heating device.

The advantages include:

• Continuous power even when the light is turned off;
• Correct parameters;
• High degree of security;
• The user can independently change the value of the output voltage.

Flaws:

• Noisy;
• Efficiency in the region of 80-94%;
• High price.

Line Interactive

This type is an upgraded standby device. So, in addition to batteries, it has a voltage stabilizer, so the output is always 220 V.

More expensive models are able not only to stabilize the voltage, but also to analyze the sinusoid, and in the case when the deviation is 5-10%, the UPS will automatically switch the power to the battery.

Advantages:

• Translation occurs in 2-10 ms;
• Efficiency - 90-95% if the device is powered by a home network;
• Voltage stabilization.

Flaws:

• No sine wave correction;
• Limited capacity;
• You cannot change the frequency of the current.

UPS rating for boilers

The TOP boilers include devices with the best, according to experts, characteristics. They have different types of designs.

Helior Sigma 1 KSL-12V

The UPS is equipped with one external battery. The device is adapted to Russian electrical networks. Weight 5 kg. Operating voltage 230 W. According to the type of construction, the model belongs to On-Line devices. On the front panel of Helior Sigma 1 KSL-12V there is a Russified LCD display showing network indicators. Input voltage range from 130 to 300 W. Power 800 W. The average cost of an uninterruptible power supply is 19,300 rubles.

Advantages:

• There is a special mode of operation with generators.
• Compactness.
• Reliability, long service life.
• Silent operation.
• The presence of a self-test function.
• Low power consumption.
• Doesn't overheat during extended use.
• Long battery life.
• Possibility of self-installation.
• Affordable price.

Flaws:

• The input voltage has a narrow tolerance range.
• Small battery capacity.

Eltena (Intelt) Monolith E 1000LT-12v

Chinese made product. Refers to On-Line devices. Fully adapted to work with Russian electrical networks. Input voltage range from 110 to 300 V. Power 800 W. The choice of voltage power occurs in automatic mode. Weight 4.5 kg. There is a Russified LCD display. The average cost of the model is 21,500 rubles.

Advantages:

• The relevance of the charging current for connecting to a battery with a capacity of 250 Ah.
• Optimal input voltage range.

The disadvantage is the high price.

Stark Country 1000 online 16A

The device is manufactured in Taiwan. The model was updated in 2018. Power 900 W. The UPS is designed to operate with two external circuits. The bespereboynik provides full protection of a copper at emergency shutdown of the electric power. Weight 6.6 kg. The average cost of the device is 22800 rubles.

Advantages:

• Automatic selection of operating power.
• Ability to work offline 24 hours.
• Battery protection against deep discharge.
• Wide input voltage range.
• Possibility of self-installation and ease of operation.

Flaws:

• Short wire.
• Average noise level.
• High price.

HIDEN UDC9101H

Country of origin China. The UPS is adapted to work with Russian electrical networks.It is considered the quietest uninterruptible unit in its class. It has an automatic system for adjusting the operation of the cooling system, so it never overheats during prolonged use. Power 900 W. Weight 4 kg. The average cost is 18200 rubles.

Advantages:

• Long service life.
• Reliability at work.
• Wide input voltage range.

• Intelligent control system.
• Compactness.

The disadvantage is the need for initial setup.

Lanches L900Pro-H 1kVA

Country of origin China. Power 900 W. The interrupter has a high efficiency. The model is adapted to the loads of Russian electrical networks, has an LCD display. It displays the mains input voltage parameters and other indicators of operating modes, including the battery charge level. The package includes software. Weight 6 kg. The average selling price is 16,600 rubles.

Advantages:

• Resistance to power surges.
• Affordable price.
• Reliability of work.

• Ease of operation.
• Long battery life.

The main disadvantage is the low charge current.

Energy PN-500

The domestic model has the function of a voltage stabilizer. Available in wall and floor versions. Operating modes have sound indication. A special fuse is installed to protect against short circuits. The graphic display is multifunctional. The average cost is 16600 rubles.

Advantages:

• Input voltage stabilization.
• Overheat protection.

• Design reliability.
• Long service life.

The disadvantage is the high noise level.

SKAT UPS 1000

The device differs in the increased reliability in work. Power 1000 W. It has the function of an input voltage stabilizer. Input voltage range from 160 to 290 V.The average sale price is 33,200 rubles.

Advantages:

• High work precision.
• Automatic switching of operating modes.

• Reliability at work.
• Long service life.

The disadvantage is the high price.

Types of uninterruptible devices

Today, the distribution network offers three types of UPS:

• off-line (on-line);
• on-line (off-line);
• Line-Interactive (line-interactive whether line-interactive).

Types of UPS for gas boilers and block diagrams for their connection

Offline UPS (redundant type)

These are the simplest and cheapest uninterruptible power supplies. Off-line can be translated from English as “not in line”, which reflects the principle of operation of this device. In an uninterruptible device of this type, the upper and lower voltage limits are set, at which the boiler operates normally. As long as the network parameters are within these limits, power is supplied directly from the line.

If the voltage becomes more or less, the switching relay is activated, power is supplied through the UPS from the batteries. When the network parameters return to normal, the relay operates again, turning off the uninterruptible power supply. For a gas boiler, such protection is, of course, better than nothing, but when you turn on / off the network, there are significant power surges. So the stabilization in this case is not complete - there are no big dips or peaks, but the supply voltage is far from ideal. The second disadvantage of offline type uninterruptibles is that they cannot correct the shape of the sinusoid.

Scheme of offline UPS (UPS)

Therefore, off-line uninterruptible power supplies for gas boilers should be used only if you already have a stabilizer installed on a scrap or apartment.It produces an ideal voltage, and the UPS in this circuit simply connects the batteries in the absence of voltage. This scheme is expensive, but creates normal conditions for the operation of equipment that is demanding on the quality of the power supply.

On-line UPS (permanent type)

This type is also called uninterruptible power supply units with double conversion. All because of the principle of operation:

• The input AC voltage is converted to DC and used to charge the batteries connected to the device.
• The DC voltage is converted into AC with an ideal sine wave shape.

It turns out the power supply is converted twice. This guarantees voltage stabilization and an ideal sinusoid shape.

Scheme of work of online uninterruptible

Online uninterruptible power supplies are connected to break the power circuit. While the voltage is normal, the linear power is converted, when the voltage is low, its deficiency is replenished by charging the batteries, in the absence of power supply is supplied from the battery.

The disadvantage of this equipment is the high price and rapid discharge of batteries, which is due to the fact that it is spent on straightening surges. However, if you need the best uninterruptible power supply for a gas boiler, buy online type equipment.

Line-Interactive (line-interactive)

The properties and characteristics of uninterruptible power supplies of this type are not as good as those of online models, but not as bad as those of offline units. There are all the same batteries and a switch that, when the voltage drops, connects the UPS. But to stabilize the voltage, there is a special unit - an automatic voltage regulator (AVR in the figure above).

How an interactive uninterruptible power supply works

The disadvantage of linear-interactive uninterruptible power supplies for a gas boiler is a non-instantaneous switching when the voltage changes. But it is much less than in offline devices, but the voltage is maintained constant (within certain limits). This equipment is the best choice, as it guarantees good results at a relatively low price.

Design and principle of operation

On the market, this type of equipment is presented in a large assortment and each product from different manufacturers has its own wide range of models. Depending on the modification, the UPS can be equipped with the following main components:

• Rechargeable battery (ACB). It may have one or more pieces. They can also be built-in or external.
• Stabilizer. Designed to stabilize the voltage. An analogue can serve as an automatic transformer.
• inverter. Converts direct current from the battery into alternating current for normal operation of the boiler's electrical equipment.

• Charger (charger).

The principle of operation of all modifications of uninterruptible power supplies is to instantly switch the power of all electronics and electrical equipment of the boiler from the network to the battery if the voltage parameters of the electrical lines do not correspond to the specified values.

When the electricity supply stabilizes and the voltage parameters correspond to the permissible values, the reverse switching is carried out. During downtime, the UPS will recharge dead batteries.

Conclusions and useful video on the topic

Briefly about the main characteristics of household UPS:

The variety of UPS types and their characteristics is a consequence of the different conditions of their use: the power and type of connected devices, parameters and typical problems of a particular electrical network. An uninterruptible switch is usually not the most expensive element in the system, but the stability of its operation depends on it. Therefore, it is necessary to determine the operating conditions and carefully approach the choice of model.

Still have questions about the topic of the article? Or can you supplement this material with interesting information about the UPS? Please write your comments, ask questions, share your experience in the block below.