Do I need a voltage regulator for the refrigerator and which one is better?

Modern refrigerators - sophisticated household appliances. They consist of a set of elements, including not only the electric motor and compressor, but also a variety of electronic filling, with the help of which the various modes of operation of this unit operate. All of them, like most electrical appliances, consume electricity around the clock.

When buying a refrigerator, experienced sales consultants recommend purchasing a voltage stabilizer. Why is it needed? Is it possible to do with a simple network filter? How to choose a voltage regulator for a refrigerator? With all the questions we will understand in this article.

voltage regulators for refrigerators

Why do I need a voltage regulator for a refrigerator?

Most of the electronic components of the device sensitively reacts to voltage drops in the electrical network, which, unfortunately, are not uncommon today.

Many manufacturers prescribe in the warranty cards the point of failure of the device due to faulty wiring, indicating that this case does not apply to repair at the expense of the company. According to statistics, in nine out of ten cases a failed compressor leads to the need to purchase a new device, since the cost of repair is sometimes unjustified. And the reason for such a breakdown often become jumps in the power grid.

To protect the refrigerator from possible damage due to fluctuations in the mains, a voltage regulator of 220 V can help. The cost of this device, which allows to protect modern household appliances, in any case will be lower than repair.

Possible breakage of parts of the refrigerator

Unstable operation of the power grid, drops and sudden voltage surges in it can cause the following failures:

  • failure of electronic temperature control elements (due to sudden short-term voltage surges);
  • failure of the control elements of the compressor (with long work at low voltage mains);
  • failure of the windings of the compressor motor (occurs both due to the low voltage of the network, and in the event of a sharp increase);
  • combustion of the crank-rocker pair of the compressor (due to frequency jumps during an unprotected start);
  • malfunction of the electronic control unit, through which the user sets the temperature of the refrigerator and freezer.

Surge protector or stabilizer?

To get started is to determine the quality of your power supply. Depending on this, it is already up to you whether you can do with a simple network filter or have to buy a more reliable stabilizer.

network filter

According to Russian GOST, for electrical grids the rated voltage is 220 volts, with a tolerance of 10 percent “plus or minus”. Nominal normal permissible GOST voltage in the electrical network will be the interval from 198 to 242 V. Practically all manufacturers of electrical appliances and equipment produce their equipment to work in this acceptable GOST range.

This is ideally in accordance with GOST, but in reality almost all electrical networks operate with frequent fluctuations and voltage drops, which often go beyond the intended range. This is influenced by many factors - starting with the quality of the electricity networks themselves, which depend on the electricity suppliers, to our environment and the seasonal load on the network.

To diagnose the network, you can invite a specialist.As practice shows, most of the power grids in Russian homes, including new buildings, do not meet the standards. Therefore, to protect expensive household appliances, it is recommended to install additional voltage stabilizers for refrigerators. The modern market offers consumers a wide choice of various models both in technical characteristics and in appearance.

voltage test

Low voltage

Low voltage in the network can lead to the impossibility of starting the compressor motor. In this case, the current through the winding will continue to flow, which will lead to its overheating. This can lead to compressor failure. Even if there is enough low voltage in the network to start the engine, it will still overheat (in order to deliver the required power for operation). This will also lead to engine breakdown. To solve the problem of undervoltage in the network can only voltage regulator.

Increased stress

Engine power depends on the supply voltage to the network. If at low line voltage the compressor can provide the necessary power due to more intensive work,then with increased there is no reverse. In this case, the motor will produce more power than is necessary for normal operation. The device will work with overload, which will lead to failure before the nominal period.

In addition, at increased voltage, breakdown may occur in the rotor windings, which, in turn, disables the electronic filling of the refrigerator.

High voltage interference

Sometimes with a stable voltage in the network, so-called short-term high-voltage disturbances may occur. Such jumps are short-lived, but the indicators may increase dozens of times. Usually they are associated with problems on the part of electricity suppliers (inductive peak surges due to equipment accidents at substations) or natural disasters (lightning strikes at power lines, breaks in power lines, and others). Any electrical equipment is sensitive to all such jumps, including refrigerators.

mains voltage regulator

A simple power filter can protect the device from such jumps. But if you have already decided to purchase a voltage regulator for the refrigerator, then you do not need to buy a filter either. The device provides protection of equipment connected to it from short-term high-voltage surges.

How to make the right choice?

In the market of electrical equipment today there is a very large selection of such devices with a fairly large range of prices for them. Answering the question about what voltage regulator is needed for a refrigerator, the first thing to note is the purchase of a single-phase option.

Often, consumers are offered expensive three-phase devices, but in everyday use for the home there is no need for them. Three-phase stabilizers are needed when connecting to them industrial and very powerful refrigerators.

The main parameters of the stabilizer when choosing:

  • power;
  • operating voltage range of the network;
  • speed;
  • reliability and safety.
voltage regulator 220 v


This is the main characteristic of any voltage stabilizer for the refrigerator. To determine this indicator, it is necessary to take into account the rated starting power of the device that will be connected through it. When you start the most important consumer of electricity in the refrigerator - compressor, the required power is 5 times higher than indicated in the passport of the device. What to do in the absence of instructions and a passport? As they say in their reviews, users, the information can be found on the back of the unit.This figure should be multiplied by 5. That is the starting power.

In addition, when determining the power of the stabilizer, it is necessary to take into account the surcharge if the power supply network often operates with a reduced voltage in the network. In this case, it is recommended to make a 20% increase in starting power (which was determined by the nominal). So, if the rated power of the device is 200 W, then the starting one will be 1000 W, plus a 20% increase in low voltage - 200 W. Hence, we find that the power of the voltage regulator for an imported refrigerator should be not less than 1200 W.

rated power of the refrigerator

Working range

The more this indicator, the better. Most stabilizers support the voltage range in the network from 70 to 330 V. Depending on the problems in the network, you should choose from the existing ones:

  • 100-260, if the network voltage is low;
  • 120-300 if the network voltage is high.

Speed ​​performance

This parameter is usually specified by manufacturers of voltage regulators for refrigerators and is measured in ms (milliseconds). In practice, 10-20 ms is enough. Do not chase for ultra-fast stabilizers. A parameter of 10–20 ms is sufficient for a quick response of a 220 V voltage regulator to any changes in the network in everyday life.

voltage regulator for refrigerator 220 v

Reliability and safety

It depends directly on the manufacturer. As they say user reviews, when buying a cheap model from an unknown manufacturer, you can get a device that will soon fail. It is better to give preference to well-known manufacturers, whose reputation is verified and known. This is especially true if the choice is made in the direction of a powerful and expensive stabilizer.


According to statistics, voltage regulators for LG, Samsung, Bosch, Siemens, Pozis refrigerators are in great demand today. And if the Soviet-type devices worked without additional protection for many years, then modern units, “stuffed” with electronics, need additional security systems. This particularly applies to models with No Frost. It does not matter for the device of which company the protective device is purchased. As numerous reviews show, which voltage regulator is better for a refrigerator, each user decides for himself. The choice should consist of individual network features and technical parameters of the device, which is planned to be connected via a UPS.

According to user feedback, low-end power options of up to 2 kW are suitable for refrigerators with a defrosting drip system and a mechanical temperature controller.Devices with automatic defrost and electronic adjustment need a stabilizer with increased sensitivity, the range of jumps is from 180 to 250 V.

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