JINDAL’S Automatic Voltage Controllers provide foolproof protection against High / Low / Unbalanced Voltage. Jindal’s AVC resolves 99% of voltage problems automatically and ensures a steady voltage supply round the clock. They are known for their rugged built and maintenance-free performance.
Jindal’s AVC’s are trusted in more than 35 countries across 5 continents.


Voltage fluctuation is a common phenomenon in every part of the country. The industrial units running round the clock, usually face the problem of low and high voltage. 90% of industrial load motors . Electric motors draw considerably high current at low & high voltage. This higher current affects the electrical motors ( particularly smaller capacity motors upto 7.5 H.P.) in three ways:

Adverse Effects of Single Phasing

With the installation of the stabilizer and maintaining 390/400 volts, the motor will operate smoothly drawing 15-20% lesser current and correspondingly the relay setting can be reduced by 15-20% In case single phasing occurs, the relay will trip in 40-50 seconds. The motor can withstand the high current fot this period and will be safe. Also, the relays, contactors, switchgears, etc. incorporated with the motor will be safe

Who Needs a Stabilizer

If your unit is suffering from low / high / unbalanced voltage, you need to install a stabilizer soon. Industrial units having acute / higher failure rates of Electrical Equipment such as bulbs, tubes, chokes, starter, contactor coils, motors, etc., should verify that it may be due to voltage variation (esp. high voltage). You may note down hourly readings of incoming voltage for a few days continuously. If you find that input voltage is lower or higher than 230V (single ph) / 400V (3-phase) even for a few hours a day, then you definitely require a stabilizer. Call our Engineer for Free On-Site Voltage Analysis.



JINDAL’S AVC are available in a wide range & various models. Besides, we also manufacture bespoke designs as per specific customer requirements. The standard models conform to the following specifications:

Capacity30 kVA to 5000 kVA
TechnologyLinear Type On-Load Voltage Regulators with Stepless Regulation
(also referred to as Vertical Rolling Contact or Columnar Design)
Control ModuleMicroprocessor based
Frequency50 / 60 Hz ± 5%
TypeBalanced (Common Control for all three phases.
Suited for Balanced input supply & up to 40 % Unbalanced load)Unbalanced (Individual Phase Control. Suited For unbalanced input supply and unbalanced load)
Load VariationAdmitted from 0 to 100%
InstallationIndoor / Outdoor as per site requirement
CoreCRGO Lamination Best Grade
CopperElectrolytic Grade (99.97% Pure)
CoolingNatural Oil-Cooled, ONAN (Available in all models)
Air-Cooled, Natural / Forced (available in select models)
Output Voltage400V ± 1% (Ph – Ph) / 230V ± 1% (Ph – N)
Input Voltage
350 – 450V340 – 460V330 – 470V320 – 480V300 – 500V
 *(wide & asymmetrical ranges are manufactured on order)
~ 99.5%> 99%~ 99%~ 98.5%> 98%
Duty Cycle / LifeDesigned for 100 % Continuous Duty Cycle &
for a life of 18 – 20 years at extreme conditions
Response TimeLess than 10 milliseconds
Correction Rate6 – 15  Volts / second (up to 500 kVA) and 3 – 8 Volts / second (above 500 kVA)
Waveform DistortionVirtually Nil
Ambient Temperature-10 to +45 °C
MountingOn Unidirectional Wheels
TerminationAluminium Bus – Bars provided for Input & Output in a common junction box
Optional FeaturesHigh / Low / Over Load / Single Phase Preventer / Short Circuit / Surge Suppressor / Bypass As on Request

Pay-Back Period

Jindal’s AVC’s not only stabilized incoming voltage fluctuations, but in the process also help save energy upto 30% and reduce breakdowns upto 80%. We ensures continuity in production and consistency in quality despite incoming voltage variations. Owing to its high efficiency and associated benefits, the pay-back period for the cost of our Servo Stabilizer  is typically between 6 to 18 months, depending upon the nature and duration of load and the extent of voltage variation. And more often than not, it is simply avoiding a few minutes machine downtime or just one failure to recover the cost of the equipment.


Jindal’s AVCs are installed either along with the main Distribution Transformer / Panel to ensure stabilized voltage supply to entire plant & machinery / complex, or along with individual machines processes to hold voltage / current / power / temperature / lighting intensity constant. Our AVCs find wide application across all kinds of machines or industries / commercial / residential complexes.

Mines & CollieriesCement PlantsFlour MillsRice Shellers
Hotels & RestaurantsFood Processing unitsPharmaceutical UnitsEngineering Products
Hsopitals & ClinicsTea & Coffee EstatesPaper MillsCold Storages
Oil PlantsRubber IndustriesTextile MillsWarehouses
Rolling MillsPlastic MouldingHigh Rise BuildingsLeather & Footwear
Vineyards & Poultry FarmsSponge Iron UnitsBreweries & BeveragesShowrooms
Schools & CollegesOffices & ResidencesShopping MallsAny kind of manufacturing


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