The Function of an Automatic Voltage Stabilizer

An Automatic Voltage Stabilizer (AVS) also defined as an Automatic Voltage Regulator (AVR) or Voltage Regulator (VR), stabilizes the mains power supply voltage to a load. 

It is a feature of Line Interactive’s uninterruptible power supplies and gives protection from power obstacles such as sags, brownouts, and surges.  

Automatic Voltage Stabilizers have a comprehensive input voltage window. If the input supply voltage is extremely low, the AVS uses a transformer to boost the output voltage. On the other hand, if the input supply voltage is excessively high, the AVS decreases the voltage to a secure operating range.

The common voltage stabilizers incorporate manual operated or switchable stabilizers, automatic relay stabilizers, solid-state or static stabilizers, and servo-controlled stabilizers. Most stabilizers come with extra features like input/output low voltage cutoff, input/output high voltage cutoff, overload cutoff, output start and stop facility, manual/auto-start, voltage cutoff display, zero voltage switching, etc. 

Why Automatic Voltage Stabilizers are needed?

Usually, each piece of the electrical appliance is designed for a wide range of input voltage. Depending on the sensitivity, the working range of the equipment is defined to a particular value, for example, some equipment can tolerate ± 10 percent of the rated voltage while others ± 5 percent or less. 

The voltage inconstancies are very common in several areas, especially at terminated lines. The most common causes for voltage inconstancies are lighting, electrical faults, damaged wiring, and periodic turning off the device. These fluctuations create mishaps to the electrical appliances.

So the voltage stability and accuracy determine the right operation of the equipment. An automatic voltage stabilizer in Malaysia ensures that the voltage inconstancies at the incoming power supply do not affect the load or electrical appliance. 

How does Automatic Voltage Stabilizer work?

It is very common to have a voltage stabilizer with fridges, air conditioners, televisions, furnace equipment, micro oven, music systems, washing machines, etc. The main purpose behind the usage of automatic voltage stabilizers is to protect the devices against voltage inconstancies. 

In an automatic voltage stabilizer, voltage correction from over and under-voltage situations is performed through two primary operations, namely boost and buck operations. These operations can be conducted manually by switches or automatically through electronic systems. During under-voltage conditions, boost operation increases the voltage to a rated level while buck operation decreases the voltage level during an overvoltage condition.  

Types of Voltage Stabilizers

There are many kinds of voltage stabilizers available in the market from various manufacturers. Stabilizers come with a different KVA rating for the normal range as well as a wide range of applications. 

These are available for various homes and also industrial appliances like air conditioners, LCD/LED TV, fridges, music systems, washing machines, and also available as a single large unit for all appliances.

Stabilizers consume very little power, typically about 2 to 5% of maximum load. 

Three main types of voltage stabilizers:

1. Relay type Voltage Stabilizers

Voltage regulation is conducted in this kind of voltage stabilizer by changing the relays to link one of the transformers’ multiple tapping to the load, whether for increasing or decreasing performance. It has an electronic circuit and set of relays besides the transformer. The electronic circuit includes a rectifier circuit, operational amplifier, microcontroller unit, and other small components. 

This type of stabilizer is most commonly used for low-rank appliances in residential, commercial, and industrial applications as they are of low weight and low price.

2. Servo controlled Voltage Stabilizers

Commonly known as servo stabilizers and it utilizes a servo motor to enable voltage correction.   

These are essentially used for high output voltage accuracy, typically ±1 percent with input voltage changes up to ± 50 percent. 

These stabilizers can be single-phase, three-phase balanced or three-phase unbalanced units. In a single-phase type, a servo motor connected to the variable transformer achieves voltage improvement. 

In case of a three-phase balanced type, a servo motor is linked with three autotransformers so that stabilized output is produced during inconstancies by adjusting the output of the transformers. 

3. Static Voltage Stabilizers

A static voltage stabilizer doesn’t own any moving parts as a servo motor mechanism in the case of servo stabilizers. It utilizes a power electric converter circuit to achieve voltage regulation. It is possible to generate higher efficiency and superior voltage regulation by these stabilizers compared with servo stabilizers. 

At Right Power, we are proud to say that we provide backup power supplies for a range of clients across a whole spectrum of industries, including data centers, healthcare, and telecommunications. So whether you need an automatic voltage stabilizer, you can trust our years of experience to provide you with the backup power you require. Visit our official website to see the best ups suited to your requirements.