What is the difference between voltage regulator and voltage stabilizer

Works in open loop voltage output is not sensed. Regulator: output voltage is mantained constant if input voltage OR load current change. Works in closed loop voltage output is sensed. Regards Z. Dear Dinesh, talking in Indian market context.. There are two types of them one with a auto transformer with several winding taps connected to relays.. Hope the above explanations will clear your doubts..

They are the same. They made up of auto-transformer of different voltage output ,switching device,The control cct is made of voltage comperators. They are also input voltage range which on the transformer design. They made up of auto-transformer ,switching device,The control cct is made of voltage comperators.

They are also have input voltage range which depend on the transformer design. Cs etc Click to expand Stabiliser does this it either gives a stable output or breaks the circuit if the voltage drop is too high or low The regulator is bit different in its response to that of the stabiliser. All voltage stabilizers use the same technique to stabilize the output voltage. The output voltage is sampled through a voltage-dividing resistor connected to the inverting input of the error amplifier, and the non-inverting input of the error amplifier is connected to a reference voltage.

The error amplifier always tries to force its inputs to be equal. To this end, it provides load current to ensure that the output voltage is stable that is, negative feedback.

It should be noted that although the transformer does not have a voltage stabilizing effect, it is possible to design a transformer with a voltage stabilizing effect using negative feedback technology, which is not a problem, but general transformers are not like this. The output voltage of the transformer within a certain range of use does not change much, and what we call voltage regulation is not a concept.

We are specializing in manufacturing Uninterruptible Power. E-MAIL1: sales kebopower. E-MAIL2: enquiry kebopower. AVRs are able to regulate the voltage that flows into your appliance, resulting in a stable electrical input and therefore prolong Learn about the five questions you need to ask when purchasing na AVR. If you follow this, you'll be sure to get an AVR that perfe Your email address will not be published.

Save my name, email, and website in this browser for the next time I comment. Submit Comment. Introducing our newest product: the Panther Voltage Protector! It protects the equipment or machine against over voltage, under voltage, and other voltage surges. It is also called as automatic voltage regulator AVR.

Some of these equipments are air conditioners, offset printing machines, laboratory equipments, industrial machines, and medical apparatus. Voltage stabilizers regulate the fluctuating input voltage before it could be fed to the load or equipment which is sensitive to voltage variations. The output voltage from the stabilizer will stay in the range of V or V in case of single phase supply and V or V in case of three phase supply, within given fluctuating range of input voltage.

This regulation is carried by buck and boost operations performed by internal circuitry. These can be single or three-phase units as required by the type of application and capacity KVA needed. Three-phase stabilizers come in two versions as balanced load models and unbalanced load models. These are available either as dedicated units for appliances or as a big stabilizer unit for whole appliances in a particular place, say whole house.

In addition, these can be either analog or digital type of stabilizer units. The common types of voltage stabilizers include manual operated or switchable stabilizers, automatic relay type stabilizers, solid state or static stabilizers, and servo controlled stabilizers.

Generally, each and every electrical equipment or device is designed for a wide range of input voltage. The voltage fluctuations rise or dip of the magnitude of rated voltage are quite common in many areas, especially at terminated lines. The most common reasons for voltage fluctuations are lighting, electrical faults , faulty wiring and periodic turning off the device. These fluctuations create mishap to the electrical equipments or appliances.

Long time over voltage will result. Long time under voltage will result. So the voltage stability and accuracy decide the correct operation of the equipment. Voltage stabilizers therefore ensure that the voltage fluctuations at the incoming power supply does not affect the load or electrical appliance. In a voltage stabilizer, voltage correction from over and under voltage conditions is performed through two essential operations, namely b oost and buck operations.

These operations can be carried manually by switches or automatically through electronic circuitry. During under voltage condition, boost operation increases the voltage to a rated level while buck operation reduces the voltage level during over voltage condition.

The concept of stabilization involves in adding or subtracting the voltage to and from the mains supply. For performing such task stabilizer uses a transformer which is connected in different configurations with switching relays. Some stabilizers use a transformer with taps on winding to provide different voltage corrections while servo stabilizers use an auto transformer to have wide range of correction.

The figure above illustrates the boosting configuration in which the polarity of the secondary winding is oriented in such a way that its voltage is directly added to the primary voltage. Therefore, in case of under voltage condition, transformer whether it can be tap changing or autotransformer is switched by the relays or solid state switches such that additional volts are appended to the input voltage.

In the figure above, transformer is connected in bucking configuration, wherein the polarity of secondary coil is oriented in such a way that its voltage subtracts from the primary voltage.

The switching circuit shifts the connection to the load to this configuration during over voltage condition. The figure above shows two stage voltage stabilizer which uses two relays to provide constant AC supply to the load during overvoltage and under voltage conditions.

By switching the relays, buck and boost operations for two specific voltage fluctuations one is under voltage, for instance, say V and another for overvoltage, say V can be performed.

In case of tapping transformer type stabilizers, different taps are switched based on the required amount of boost or buck voltages. But, in case of auto transformer type stabilizers, motors servo motor are used along with sliding contact to obtain boost or buck voltages from the auto transformer as it contains only one winding.