What is voltage stabilizer? Advice on choosing to buy a voltage stabilizer that suits your needs

Voltage stabilizer is an electrical device that helps to stabilize the power supply in the house. If you are living in a place with unstable power supply, you need to buy a voltage stabilizer for your family immediately to stabilize the operation and capacity of the equipment in the house. Let’s find out about family voltage stability with lassho.edu.vn through the article below!

What is voltage stabilizer? When to buy voltage stabilizer?

Voltage stabilizer (Voltage stabilizer) is an electrical device capable of transforming voltage to bring high or low voltage current to a stable level (220V – 110V) based on the principle of electromagnetic induction. Currently, there are 2 power grids: 1-phase and 3-phase, so voltage stabilizers are also divided into 1-phase and 3-phase voltage stabilizers.

In addition to the stabilizing function, most voltage stabilizers have additional features such as input/output low voltage cut-off, input/output high voltage cut-off, overload cut-off, manual/automatic start-up, zero voltage conversion,… to help stabilize electrical equipment.

Weak, unstable power is the main cause of electrical equipment such as televisions, refrigerators, stereos, air conditioners, air conditioners, fans, etc. fire, engine failure.

Especially when summer comes, temperature conditions make most electrical appliances in your home unable to operate at full capacity. Especially the air conditioner, even if you lower the temperature below 20 degrees, it is still not cool. Stabilization is an effective solution.

Here are some cases that immediately think of buying a voltage stabilizer:

• Weak and unstable power source : There is a problem in the low voltage power line, the surge in power voltage burns all electrical appliances in the house. Weak electricity makes the air conditioner unable to start, or run slowly, cooling is not deep, only running the fan, so it does not play its full role in cooling the air.
• Protection of electrical equipment : On the power line with neighbors in the same area, welding machines are often used, the electricity is flickering, the light bulbs are constantly flashing, causing eye strain, and the lamp life is very low.
• Stable power source : During peak hours, many families simultaneously use electrical appliances. The cooking of rice is greatly affected by weak electricity, the rice is not cooked or on the bottom of the river.
• Using other electrical equipment : The family bought an additional electrical appliance (refrigerator, washing machine, air conditioner…) using 100V electricity and did not know how to use it.

With the help of voltage stabilizers with the ability to keep electricity stable, these conditions will be overcome.

Working principle – Effect of voltage stabilizer

The most popular types of voltage stabilizers on the market today will have 5 main operating principles as follows:

• Using a toroidal transformer combined with brushes, take the voltage out directly.
• Use a compensating transformer to coordinate with a brushed toroidal transformer or an IGBT semiconductor device.
• Use transformers and capacitors.
• Use transformers to coordinate relay switching.
• Using pulse transformer and electronic circuit.

Principle of operation using toroidal transformer with brush

Conventional voltage stabilizers have a toroidal transformer wrapped with an electromagnetic wire, with a brush attached to the surface of the wire. The carbon brush will do the job of sliding to get the voltage of each turn of the wire.

When the output voltage is low or high, the control circuit will command the motor to operate. Rotate forward or reverse to get the voltage at the loop on the toroidal transformer . When the output voltage is enough 220V , the comparator circuit will command the motor to stop.

And when there is a power failure, the brush will automatically return to the safe position, corresponding to the high input voltage so as not to accumulate voltage when the power is restored.

The principle of single phase voltage stabilizer is simpler than that of 3 phase voltage stabilizer. Each machine has only structure:

• 1 Control circuit.
• 1 Toroidal transformer (The larger the capacity, the larger the transformer).
• 1 Motor drives up and down rotation.
• 1 Standard size carbon brush with toroidal transformer.
• Accessories that come with the machine such as clocks, terminals, indicator lights…

The effect of voltage stabilizer :

– Protection of electrical equipment : The voltage stabilizer will overcome the situation of electricity level above or below the voltage level, causing harm to electronic devices, damage to equipment or fire.

– Keep the output voltage stable : When the input voltage changes within the allowable range (called the voltage stabilizer range), it provides an ideal power source to meet other electronic devices and protect electronic equipment in the field. family.

– External voltage stabilizer : integrates many features to maximize electrical equipment protection, creating a safe electrical system for your family:

• Automatic protection of over-current, short-circuit by Circuit Breaker (CB) : The voltage stabilizer will automatically cut off power when overloaded, avoiding short-circuiting and fire.
• Automatic overvoltage protection by electronic relay: The voltage stabilizer will automatically cut off the voltage when there is a problem causing the output voltage to be too high (beyond the operating range of the machine) to protect the equipment well. electricity. The voltage stabilizer will automatically turn back on when the fault is over.
• Anti-electric shock by Delay, Auto-reset system : The voltage stabilizer will automatically bring the brush to a safe position when the power is lost and when the power is restored, the voltage stabilizer has a delay of about 5 seconds to stabilize the voltage after that. power supply to the load.
• Some voltage stabilizer models are equipped with Circuit Breaker (CB) reversing : When the voltage quality is low, unstable, we should use this type of voltage stabilizer to improve the life of electrical equipment.
• Many voltage stabilizer models are equipped with 2 voltmeters or 1 voltmeter with switch to display input – output voltage : The function makes it easy to accurately monitor the quality of input and output power for proper adjustment.

Steps to choose to buy a voltage stabilizer

Here are 3 steps to choose to buy a voltage stabilizer that suits your needs, you should refer to these 3 steps to choose to buy.

Select phase number

– Currently, voltage stabilizers are classified according to the needs of consumers, including:

• Single phase voltage stabilizer (110V – 220V): Used for home or office appliances.
• 3-phase voltage stabilizer (200V – 220V – 380V): For factories using industrial electrical equipment.

Select input voltage range

– The input voltage is the range of electricity that the voltage stabilizer can receive at the input to convert it into a suitable voltage at the output. When the input current has voltage fluctuations in the voltage range of 60V – 250V, the output voltage will be stable in accordance with the equipment used.

For example : The input current has a voltage of 60V, 90V, 150V, 160V or 250V in the 90V – 250V voltage range, the voltage stabilizer will be converted to an output voltage of 110V – 220V depending on the needs of use with voltage stabilizer type 1. phase.

Select capacity of voltage stabilizer

– Voltage stabilizer capacity is printed on the front of the machine or displayed on the label with the symbol KVA. This is the symbol for the rated power of the voltage stabilizer and the actual power when operating will be expressed in Watt (W). The conversion formula between these two quantities is 1 KVA = 800W.

– When choosing to buy a voltage stabilizer, you need to choose the voltage stabilizer capacity based on the total capacity of the electrical equipment intended to use the voltage stabilizer. Calculating before choosing to buy a voltage stabilizer will help avoid dangerous overload during use.

You can refer to the table of capacity of electrical appliances in the home :

Electrical equipment	Estimated capacity
Air conditioner 1.5 HP	1000W
Direct water heater	4000W
Refrigerator 400 liters	250W

Note: This table is only for a quick estimate of the capacity of household electrical appliances, to be able to choose to buy an accurate voltage stabilizer, you should check the device capacity directly. After calculating the total capacity of electrical equipment in my family, I started to choose to buy a voltage stabilizer: for every 800W of household appliances, = 1KVA voltage stabilizer.

Refer to the quick conversion table of voltage stabilizers :

Stabilizer capacity	The capacity of household appliances can meet
1KVA	540W
2KVA	1080W
3KVA	1620W
4KVA	2160W
5KVA	2700W

1KVA capacity is suitable for many electrical devices operating at the same time under 540W, for example voltage stabilizer can be suitable for 110W laptop, 1 250W Laser printer, 1 55W wall fan,… Total capacity of electrical equipment used is 415W, smaller than the limit that this voltage stabilizer provides.

With a capacity of 2KVA, the voltage stabilizer can be used at the same time for many different electrical devices with a total capacity of 1100W. For example, you can use this voltage regulator for a 600W rice cooker and a 300W refrigerator.

3KVA capacity is suitable for many electrical devices operating at the same time under 1620W. For example, use 1 1000W air conditioner, 2 150W air conditioner fans and 1 250W laser printer. Total electrical equipment uses 1550W, smaller than the 1620W that this voltage stabilizer provides.

The capacity of 5KVA can be used for 1 air conditioner with capacity of 1000W, 2 air conditioner fans of 60W, 1 electric hot pot 1300W and 4 desk lamps of 5W. The total electrical equipment used is 2440W, less than the recommended 2700W of this voltage stabilizer.

Choose a power cord

To avoid voltage drop when the machine is loaded, it is necessary to choose a conductor cross section large enough to correspond to the capacity of the machine.

You can refer to the following table :

Stabilizer capacity	Minimum conductor cross-section
1KVA	1 mm2
2KVA	Approx. 2.5 mm2
3KVA	Approximately 4 mm2
5KVA	Approximately 6 mm2
10KVA	Approximately 11.5 mm2

Thus, before buying a voltage stabilizer, you need to clearly determine: Number of phases, input voltage range, machine capacity.

For example: You buy a voltage for home use, the input voltage is low below 170V (weak electricity causes the fluorescent lights to turn off), The total power of electrical equipment you want to use with a voltage stabilizer is 5400W, you should stabilize the voltage. selected as 1-phase voltage stabilizer, input voltage range 150V – 250V, voltage stabilizer capacity is 10 KVA.

After purchasing a voltage stabilizer, the conductor cross-section to connect the voltage stabilizer to the grid is about 11.5 mm2 for stable operation.

Learn the benefits of voltage stabilizers

Overload and short circuit protection

– Equipped with CB device, mini CB and automatic fuse (ACB), the voltage stabilizer has the ability to automatically disconnect the power supply if it is in a state of overload, short circuit, short voltage, ensuring the life of the devices. electrical equipment at the same time bring safety to users.

– In addition, the voltage stabilizer also has the ability to automatically protect overvoltage by electronic relay : the voltage stabilizer will automatically cut off the voltage when there is a problem that causes the output voltage to be too high (beyond the operating range of the device). machine) for good protection of electrical equipment. After that, the machine will automatically restart again when the problem is gone.

Durable motor, ensure output voltage

– The brush position will be adjusted quickly to recognize the input voltage, to keep the output voltage continuous automatically, to ensure that the device is not interrupted to provide a stable power supply for electrical equipment that is running. use.

Anti-electric shock

– Delayed start feature to prevent electric shock, the output circuit of the voltage stabilizer is delayed from 3 to 5 seconds to stabilize the voltage and prevent voltage shock before supplying to the device to ensure compatibility with other devices. other electricity, ensuring the safety of users.

Power inverter

– When the voltage quality is good and stable, we should not use voltage stabilizers because it causes waste. With a power inverter, you can directly use electricity from the source or through the voltage stabilizer to suit your needs.

Wide input voltage range

The voltage stabilizer is equipped with a wide input voltage range to meet different needs of users. According to international standards, the frequency range of single-phase voltage stabilizers includes 3 types of input voltage ranges :

• Range 150V~250V: Normal range.
• Range 90V~250V: Wide range.
• Range 50V~250V: Very wide range.

Compact design, with handle

– On the market today, voltage stabilizers often have a boxy, square and compact design, with a handle that makes installation easy and does not take up much space when assembling.

– Analog clock clearly displays convenient parameters, easy to monitor input voltage, output voltage.

Select brand, place of production

On the market, there are many different brands of voltage stabilizers with diverse models for you to choose from. Please refer to some reputable brands to help you rest assured to choose the right voltage stabilizer for your needs.

Criteria	Brand, place of manufacture	Outstanding Features	Guarantee	Price range
Robots	– Brand: Vietnam – Production: Vietnam	Equipped with Autoreset function with wide range machines. Servo motor (transformer & brush) automatic. See more here	Genuine 3 years	1.2 – 7 million won
Liao	– Brand: Vietnam -Manufacturing: Vietnam	The structure consists of 1 toroidal silicon corrugated core. DC Servo motor, test voltage 1500V within 1 minute .	Genuine 3 years	1 – 25 million won
Standa	– Brand: Vietnam – Production: Vietnam	The structure consists of 1 Feranite corrugated iron core. DC motor motor. Overvoltage protection by Aptomat control circuit. Using 2 carbon brushes, the machine runs smoothly, quickly compensates for electricity, and has enough capacity.	Genuine 4 years	2- 20 million won

Purchase and warranty policy at lassho.edu.vn

Customers can buy voltage stabilizers at lassho.edu.vn supermarket or buy online on dienmayxanh.com website by buying in installments through a financial company or paying via Visa, Mastercard, JCB cards with simple procedures.

When buying voltage stabilizers at lassho.edu.vn, customers will enjoy many attractive incentives and 100% genuine warranty policy. As follows:

– Warranty with commitment within 12 months

– Fast delivery , free installation

– Refund for defective and non-defective products:

• The first month from the date of purchase: charge 20% of the invoice value
• 2nd to 12th month: charge 10% of bill value per month

– Support guidance and advice via the free hotline 1800.1061 (7:30 – 22:00)

(Purchase policy, warranty updated on 11/05/2021, may change from time to time. You can see more latest information here.)

Please refer to some voltage stabilizers currently in business at lassho.edu.vn:

Hope you will choose to buy a quality voltage stabilizer. Please visit the nearest lassho.edu.vn to visit and shop!

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