Voltage Stabilizer or Voltage Regulators.

2f9a86313dbaaaa5e9c0Voltage Stabilizer or Voltage regulator is device which generates constant output voltage even there is variation in input voltage when input voltage within range for which it designed. Since this device correct voltages automatically, it often called as Automatic Voltage Stabilizer or Automatic Voltage Regulator (AVR).

Why Do you need Voltage regulator?

AVR is generally used in countries which has weak infrastructure for generation, transmission and distribution of Electric power. Or it is use in heavily industrialised modern countries which observes low voltages in industries due to weak grid. Grid voltages designed for linear load (resistive load) and when grid subject non-linear load (inductive or capacitive) then sudden high or low current demanded from grid which tends to sag or swell in grid voltage. Electric Grid is very complex and even Modern system is based on high-inertial generation, rugged transmission lines and latest distribution system, we can observe unstable voltages in our facilities. Voltage stabiliser device is answer to unstable voltages. It will treat voltages with high speed to ensure stable, safe and clean voltages for your important loads depending on technology then use. Traditionally servo motor is used in voltage regulator to correct output voltages; this equipment called as servo ac voltage stabilizer or servo voltage regulator.


  •    Click on Above Tabs For Detail Specifications, Features, Application and Product catalogue
  •    General Specifications

       Rating: 10kVA/ 22kVA/ 30kVA/ 45kVA/ 60kVA/ 80kVA/ 100kVA/ 150kVA/ 200kVA/ 300kVA/ 400kVA/ 500kVA                                              

       Input Specifications:

       Regulation Voltage Range: Single Phase: 165-255VAC   Three Phase: 285-440VAC       

       Operating Voltage Range: Single Phase: 130-270VAC   Three Phase: 225-465VAC                                                

       Frequency: 45-65 Hz

       Output Specifications:

       Nominal Voltage: Single Phase: 220/230VAC   Three Phase: 380/400/415VAC  

       Voltage Tolerance: ±1% (Selectable between 1-8%) 

       Frequency Range: 45-65 Hz

       Regulation speed: 70-200 V/s

       Overload operation:  1 second at 150% load / 1 millisecond at 200% load

       General Specifications:

       Technology: Microprocessor controlled, Full Automatic Servo type

       Control: RISC Microprocessor H-Bridge MOSFET PWM Motor Technics

       Independent Phase Regulation: Standard in 3 Phase Models

       Protection: Output short circuit, Overload, Output High/Low Voltage, Over Temperature, Motor Fault.

      Please  refer our product catalogue for mode details

  •    Product Features: 

    • High performance with Microprocessor control.
    • Wide input voltage range.
    • True RMS measurement, feedback and control.
    • Best in class with 70-200 V/s regulation speed.
    • Fan Speed (high/low) control.
    • High Efficiency up to 98%.
    • Independent control panel for each phase.
    • Temperature controlled smart cooling.
    • Shot circuit protection.
    • Ease of transfer of load to utility via manual bypass. 
    • Independent /together operation of phases.
    • High performance even at 100% unbalanced load.
    • Silent operations.

  •    Applications:

    • Home
    • Industries
    • Large format printing machines.
    • CNC machines.
    • Pumps & motor.
    • Oilfields.
    • Hospitals.
    • Malls and Shopping complex.

  •    Documentations:  

    Product Catalogue: Ctrltech AVR

  •    Contact form:  

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    What is best feature a Automatic Voltage regulator should have?

    In short, a good quality voltage regulator should be fast in voltage correction, reliable and with high input voltage window.  There are many other factor which decide quality of good voltage stabilizer. Unit should must have following features:  

    • Voltage correction speed: High voltage correction speed is desirable. High voltage correction speed will ensure correction in voltage before you load switch off. It should be between 70-200 volt/second.
    • Wider Input voltage window: Voltage Stabilizer with wider input voltage window has capacity to correct bigger input voltage range. It generally defined in the form of percentage of input voltage i.e. ±20%, ±25%, ±30% etc.
    • Voltage Regulation: It is always desirable that regulator should deliver precise output voltage. Generally a good quality stabilizer has ±1% voltage regulation which is acceptable. AVR should precisely meet output regulation as percentage of nominal input supply voltage. Automatic circuit breaker should be provided in regulation circuit.
    • Efficiency: High efficiency is always desired so that losses in stabilizer should be less. High efficiency also indicated good quality of components in stabilizer especially transformer.
    • Voltage cut-off: In case of input voltage higher or lower beyond designated voltages then regulator should cut off the output with audible and visual alarm.
    • Overvoltage Protection: Unit should have overload protection and it should isolate the load connected to it and give audio visual alarm.   
    • Independent phase control: Three phase unit should have independent control for each phase. This will help fast regulation even at work stabilizer even at 100% unbalance load and 100% unbanace input voltages. Unit with independent phase control can also work in  case of non-symmetric mains supply.

    Optional desirable feature:

    • Bypass: It is better to have bypass facility in stabilizer in case stabilizer is serving very critical load. Bypass helps to connect input of regulator directly with its output by bypassing circuitry of voltage regulator. This feature is very useful in case you  like to repair or do maintenance of unit without shutdown of load.
    • Input Line filter: Input line filter will supress unwanted radio frequency components. Unit should have Input line filter in case it is use for supplying voltages to application with electronic circuits e. g. radio station, TV studio, Datacentre etc.
    • Reverse phase protection: In case of phase reversal at input voltage stabilizer should isolate load.
    • Surge  Suppressor: Unit  which are installed in mountain  area where there  is high possibility of lightning strokes (which cause high voltage spike input), should have surge suppressor to suppressor high spike of voltage. Sudden high voltage spike also can generate due to inefficient electric power network.

    To know more about Voltage stabilizer or voltage regulators Please visit our blogs.

    FAQ regarding Automatic Voltage Stabilizer:

    1. How To select Rating of Voltage stabilizer?
    2. What are the different types of AVR?
    3. How servo voltage stabilizer works? 
    4. Who are Supplier for stabilizer in UAE?


    Our Product Range

    We offer Voltage stabilizer or voltage regulator, Static Voltage Stabilizer & Generator AVR

    Static Voltage stabilizer or static voltage regulator in UAE
    Generator AVR