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How to select a voltage stabilizer?
Addtime:2011/8/26        Show:102

How to select an Automatic Voltage Stabilizer

 4 Industry   4 Resident
      Energy is committed to providing our electricity of good quality - namely, a frequency of 50 Hz and 220 V +10%. But, unfortunately, the reality is often not the case. If the frequency is usually all right, the tension in our networks may vary over a fairly wide range. As a result, electrical equipment and appliances do not work as expected, are in critical conditions, and sooner or later fail.

     Actually an automatic voltage stabilizer is designed for automatic voltage regulation, protection of equipment against voltage surges, smoothing impulsive noise.Our company has selected for its range of the most popular and high-quality models that meet a variety of technical and price requirements.

So, go directly to the method of choice:

1. Three-phase or single-phase?

      If you have a single phase, the choice is obvious.

      If the network - three-phase: In the presence of at least one three-phase consumers will need a stabilizer. Provided that the load can be used single-phase or three-phase stabilizer. The advantages of this option are at a lower cost, and avoids the singularity of three-phase stabilizers, namely the disconnection of the device when power fails in one phase (for whatever reason).

2. How to calculate the power required?

      The stabilizer can be installed to stabilize the voltage as individual equipment, and the entire facility as a whole. It depends on the specific requirements and capabilities.

      To make the model selection criterion, the voltage regulator on the required power, it is necessary to calculate the total power consumed by the load.

      Power consumption of a specific device, you can learn from the label or instructions. Sometimes the power consumption with supply voltage and frequency indicated on the back of the device or equipments.

      When calculating the power consumed by a device should take into account the so-called full capacity. Full power - that is all the power consumed by the appliance, it consists of active power and reactive power, depending on the type of load. Active power is always in watts (W), the total - in volt-amperes (VA). Devices - electricity consumers often have both active and reactive components of load.

The Active load. This kind of load the entire consumption of electricity is converted into other forms of energy (heat, light, etc.). On some units, this is the main component. Examples - incandescent lamps, heaters, cookers, irons, etc. If they are specified power consumption of 1 kW, enough power for their power 1kVA stabilizer.

The Reactive load. All other words, they are subdivided into inductive and capacitive. Example - a device containing an electric motor, electronic and household appliances. Full power in volt-amperes and active power in watts linked factor COS (Fi). On devices with reactive component loads, often point to an active power consumption in watts and COS (Fi). To calculate the total power in the VA, you need an active power in watts divided by COS (Fi). For example: if the drill is written 600 watts and COS (Fi) = 0,6, which means that in fact full power tool consumption is equal to 600 / 0.6 = 1000 VA. If the COS (Fi) is not specified for a rough calculation of the active power can be divided by 0.7.

High inrush currents. Any motor at the moment when energy consumption is several times higher than in normal mode. In the case of the load includes an electric motor, which is a major consumer in this device (for example, a submersible pump, fridge), its nameplate power consumption should be multiplied by 3, to avoid overloading the regulator while turning the device.

      It is recommended to choose a model with a stabilizer 20% margin on the power consumption load. First, you will ensure gentle treatment of the stabilizer, thereby increasing its service life, and secondly, create yourself a reserve power to connect the new equipment.

3. What should be the accuracy of stabilization?

      To select a stabilization accuracy is necessary to determine the range of voltages allowed for a protected power supply voltage regulator apparatus. To find the power settings of your equipment, refer to the instruction manual or the service center of its manufacturer. The following are approximate guidelines for the selection of a stabilizer for the type of equipment.

      To supply the sophisticated medical equipment and precision measuring devices is desired voltage up to 3%.

      Lighting equipment (lamps, spotlights, floodlights, etc.) is recommended to connect a surge protector with an accuracy of less than 3%. The higher accuracy of stabilization, the less variation of output voltage, and therefore, less visible changes in the intensity of light at sharp jumps of the input voltage.

      Power most household appliances and equipment can carry out 220 + / - 5-7%.

4. What to choose, if you fit the stabilizers of different brands?

      In this article we covered the basic principles for the selection of the stabilizer. Different brands and models differ from each other in addition to the basic characteristics of a host of other options:

Principle of the stabilizer

Design features

Respond Speed

Degree of protection

Set of features, etc.

      Therefore, for the final selection of the voltage regulator you should consult with our specialists. We are happy to give you a qualified individual recommendations. Contact us via

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