Voltage Stabilizer,Buck and boost Operation,Construction of Modern Stabilizer,Diff. B/W Voltage Stabilizer and voltage regulator,choose a correct sized voltage stabilizer,consumption of stabilizer,types

Voltages Stabilizer

                All electrical and electronic system are designed and manufactured to operate at maximum efficiency with a given supply voltage called the Nominal operating Voltage.

                For various reasons the voltage of the energy distribution does not remain constant,showing considerable fluctuations in the nominal value,which leads to the apparatus ,not only a loss of efficiency but all a significant increase in failure rate.

                 The stabilizer are electronics devices responsible for correcting the voltage of the electrical power supply to provide a stable and secure power supply to equipment , allowing for a stable voltage of the problem of the mains.The out put voltage from the stabilizer will stay in the range of 220v or 230v in case of single phase supply and 380v to 400v in case of three phase supply.

Buck and Boost operation

                 In a voltage stabilizer ,voltage correction from over and under voltage condition is performed through two essential operations,namely boost and buck operation.These operations can be carried manually by switches or automatically through electronics circuity.During under voltage conditions ,boost operation increases the voltages to a rated level while buck operation reduces the voltage level during over voltage condition.

Moderan Stabilizer

                   As advancement to the conventional relay type voltage stabilizers,modern innovative stabilizers use high performance digital control circuits and solid state control circuitry that eliminates potentiometer adjustments and allow the user to set voltage requirements through a keypad with output start and stop facility.This also lead to make the trip timing or responsiveness of the stabilizers to very less rate typically less than a few milliseconds.In addition this can be adjusted with variable setting.

Diff. between Voltage Stabilizer and voltage Regulator

                    Voltage stabilizer is a device or circuit which is designed to deliver constant voltage to the output without in changes in incoming voltage. Where as voltage regulator is a device or circuit which is designed to deliver constant voltage to the output with out in changes in load current.

Choose a Correct Sized voltage Stabilizer

• Check the power rating of the apparatus that which you are going to be used with a stabilizer.
• Since the stabilizer are rated in KVA it is also possible to calculate the wattage by simply multiplying voltage of the appliance by maximum rated current.
• It is recommend to add a safety margin to stabilizer rating,typically a 20-25 percent.This could be useful for future plans to add more devices to the stabilizer output.
• If the appliance is rated in watts,consider a power factor while calculating KVA rating of stabilizer.on the contrary,if stabilizers are rated in kw instead of KVA,multiply the power factor with voltage and current product.   

     Electricity Consumption Of Voltage Stabilizer

                 Electricity consumption of voltage stabilizers depends on the efficiency of the stabilizer.Typically they are 95-98% efficient which means they consume about 2-5% of the maximum load .So if you have a 1KVA (or 1000va) stabilizer ,it would consume about 50 watt(on peak load).

Use of Voltage Stabilizer

                   We used voltage stabilizer due to some of the following reasons.

• Increases useful life of equipments.
• Reduces malfunctions rate of equipments.
• Maintains of stabilized power supply.
• Attenuates noise,interference and lightning.
• Protects against under-voltage and over-voltage of the mains.
• Operates in cases of overloading and overheating.
• Signals events from the main.

Effects of Under-Voltage on Equipments

• Computers shut downs and sag-induced logic error.
• Damage to the Dc power supplies.
• Reduced input voltage can cause excessive power supply heat dissipation,resulting shot equipment life.
• Malfunctioning of the equipment.
• Longer working periods (as in case of resistive heaters).
• Reduced performance of the equipment.
•  Computational error.

Effects of Over-Voltage on equipment

• High input voltage can puncture a power supply rectifier and switching transistor junctions,causing MTBF reduction and eventual breakdown.
• High voltage transients lasting microseconds can permanently wreck the power supply and its electronic equipment load.
• Permanent damage to the equipment.
• Insulation damage to the windings.
• Unwanted interruption in the load.
• Increased losses in cables and associated equipments.Derating life of the appliance.

Types of Voltage Stabilizers

• Relay type voltage Stabilizers.
• Servo controlled voltage Stabilizers.
• Static voltage stabilizers.