How to choose a voltage stabilizer for a refrigerator

If you analyze the state of modern electrical networks, it will become clear that there is a clear deviation from the required norm of 220V. The error can be from 10 to 15% in both directions. Naturally, equipment can fail. SV (voltage stabilizer) is a device whose main task is to protect equipment from emergency loads. Simply put, the device protects household electrical appliances from various current fluctuations, including other interference, for example, pulsed ones.

Choosing a stabilizing device for a refrigerator - highlights

During the selection process, we look at the following points:

• power;
• input and output voltage;
• maximum current coefficient;
• number of phases;
• what type of cooling;
• noisiness;
• efficiency;
• who produces.

One of the best

The same model cannot be good for everyone: what suits one will harm another. Here you need to focus on the following nuances:

• period of possible use;
• noisiness;
• temperature range;
• humidity.

The right choice of protective devices for the refrigerator - tips and recommendations

The choice is based on the principle of their operation.The safety of equipment from well-known brands, for example, Samsung, LG, etc., can be ensured by the following types of stabilizers: relay, hybrid, triac.

Relay equipment

It is adjustable in steps and can operate over wide operating ranges, where the output accuracy is 6–10%.

Pros: frost resistance, fast response, fastenings for mounting to the wall.

Minuses: The noise level is about 30 dB, contacts may burn.

Hybrid

A combined type of equipment that smoothly regulates the voltage with an accuracy of 3%. One of the most reliable. Operation within the range from 100 to 280 V. Overload up to 130% is provided. Characterized by excellent build quality.

Thyristor

An expensive device that does its job very quietly. Capable of equalizing 220 V voltage with an inaccuracy of no more than 3–5%. The design has no moving elements, which increases reliability. The devices are durable, understandable and undemanding. They have a high overload capacity of 180%. Thyristors (semiconductor components) are used as power switches.

Top five

• Al G-2500 is expensive and irreplaceable. 2.5 kW will provide refrigeration equipment and other appliances.
• Atlant SNVT-1500 is a Russian-made device. Ideal for use in the refrigerator. The input voltage level is 100-280 V. It has excellent technical characteristics and an affordable price.
• Upover-ACH-1500 is the most economical model. It has the same indicators and characteristics as those mentioned above. Budget execution.
• Voltron PCH-1500 – only for single-phase networks. Capable of equalizing power within the range of 100 - 280 V.
• Amper-1500 – focused on three phases in the network.Equipped with additional functionality and the ability to independently adjust the required parameters.

Single phase and three phase type

Single-phase is appropriate if only a refrigerator is connected. Three-phase can be used with several connected devices at once. Typically, this type is used with high-power industrial equipment.

Recommendations from experts: if the network has one phase of power, but there is a need to power several devices, the best option is to install 3 single-phase devices rather than 1 three-phase device. It's cheap and safe.

Types of stabilizer equipment

There are several options:

Electromechanical - with an electronic type of board, the task of which is to provide control over the voltage and control the current collector motor. Used at constant minimum or maximum voltage.

Pros: maximum accuracy rate - from 2 to 4%.

Cons: Operates at low speeds.

Relay. Pros: switching occurs in a minimum period of time - 0.5 seconds, there are no delays.

Cons: multi-stage is required to prevent a voltage surge and achieve an accurate reading, noisy, contacts burn out

Seven-volter – used under conditions of severe network changes

Pros: responds quickly, allows you to constantly switch the transformer windings, subject to a stable change in voltage readings.

Disadvantages: high cost, maximum requirements for the quality level of components

Double transformation – special stabilizers

This device is called the best. Used for household equipment that is too sensitive to voltage drops with a power from 1 to 30 kW.They are characterized by minimizing interference and operating silently. The error rate does not exceed 1%. It has a wide range of input voltage 118–300V. The price is similar to the triac analogue, but the reliability and quality level of work is much higher.

Power is measured in volt-amperes and determines the overall power output. The technical documentation for the refrigerator always indicates its power consumption and is expressed in active form.

To calculate the absolute power of the refrigerator, you need to divide the data from the technical data sheet by 0.65. The result is the power of the refrigerator.

The next step: calculate the ratio of the total power indicator of a household unit, taking into account the power in combination with the starting current, which are issued by the stabilizer under the condition of a minimum input voltage.

We calculate the total power taking into account the current at startup:

250/0.65*3=1154 volt/ampere

According to the calculation result, the required stabilizer should have an output power of 1.2 kW.

If the current consumption indicator of the transformer is known, it is possible to calculate the power at this value. With an unknown current, we will make a calculation for the voltage value with the nominal number. Stabilizers for 220 V refrigeration equipment can be connected separately if there are separate plugs and sockets.