Servo Stabilizer

Servo Stabilizer - Three Phase

A voltage stabilizer is an Electrical & electronic device that supplies a consistent output voltage irrespective of input supply (Depending on Input Range). It protects Electric / electronic appliances from under and over /under voltage supply.

What is the main function of the Servo Stabilizer?

A Servo voltage stabilizer functions (Through Servo Motor) to automatically maintain a constant level (+/-1% Variation) of the voltage for our electrical appliances

Product Description

Servo stabilizers are designed and manufactured with latest technology and stringent quality measures to safeguard all types of your electrical appliances from crucial voltage fluctuations. It does never be a pay, when it comes, your valuable equipment shocks you with a breakdown pay.

Each Electrical/Electronic/Electromechanical equipments have a designed for a particular Working voltage. A highly fluctuation in AC supply is a common phenomenon in whole country. Fluctuation range is varying one place to another place depending on load ON/OFF. (In India designed single phase equipment 220V/230V/240V, 3 Phase Equipment 380V/400V/415V with 50HZ, But US/Japan Single Phase 110V/110V/120V, 3 Phase 200V/220V with 60HZ).

Constant voltage is very important for the better Efficiency, safety and long life of equipment and appliances, Some Equipments can withstand plus or Minus 20% or10% or 5% or 2% Of rated Voltage.It is Depended on purely Equipment Manufacture

Technical Specification

Capacity 3 KVA -1500 KVA Oil Cooled / 3 KVA -100 KVA Air Cooled
Input Range 220V, 240V, 295V, 340V, 360V, 380V – 465V, 480V
Output Voltage 400V AC adjustable between 380V-415V
Correction Rate 25V / 35V / 60V / 85V Sec Phase to Phase
Protection For Input & Output Over/Under Voltage/ Short Circuit/ Overload/ Single Phasing/Phase reverse,
LED Indication Input On, Output On, Output Low Cut Off, Output High Cut Off, Input Low Cut off, Input High Cut Off, Over Load, Single Phase Failure, Phase Reverse, Neutral to Earth Leakage.
System & Connection Unbalance 4 Wires (RYB&N), Star Connected & Earth
Supply Frequency 50HZ±5%
Output Regulations 1% (No Load To Full Load)
Insulation Class "F","H"
Metering 3-7 Segment Led Display for Input / Output Voltage, Load Current, Supply Frequency, setting parameters, Sensitivity, High/Low cut off voltage, Overload Current limit, Earth to neutral leakage voltage limit / Above 75KVA LCD Display provided with error log
Ambient Teemperature 45"C Maximum, Relative Humidity up to 90%
Output waveform Same as Input
Overload Capacity 120% Maximum
Type of Cooling Oil / Air
Mode of System Fully automatic
Output Control Contactor Through Manual feather touch button. Optional for automatic (7 Sec to 3 Min)
Servo motor drive Rugged AC Synchronous stepper motor
Input/Output Cabling Up to 6KVA Connectors, above 9 KVA Hylam with bold nut, above 50KVA Hylam with AL Flat / CU Flat, Input / Output Cable glands provision and Double Earth Connecting Provision Provided
Efficiency More than 98%
System Construction As Per IS : 9815-1994
Note: Non-Standard Input and Output ranges also available as per customer requirements


  • Engineering & Manufacturing (Railway, Oil & Gas, Construction)
  • Metal Cutting (CNC&EDM)
  • Textile & Apparel (Weaving, Knitting, Spinning, Dyeing & compacting)
  • Hospitals, Labaratories & Bio Medicals
  • Retail Showrooms, Restraurents
  • IT
  • Agriculture
  • Fuel Stations
  • Domestic Applications


  • Disadvantage of Equipments Working Low/High voltage?
    • Permanent Damage Equipment
    • Winding Insulation Week, Equipment Drawn High Current
    • Deratingof Equipment Life/Efficiency
    • MD (Maximum Demand) Increases,PF also Effect
    • Frequent Break Down Occurs
    • Malfunction of Equipment
    • Speed of Equipment Also Decreased
  • Type of Voltage Stabilizers?
    • Manual booster
    • Line Voltage Stabilizer
    • Servo Stabilizer
    • Static Stabilizer
    • Constant Voltage Transformer
  • What is the rate of correction servo Stabilizer?
    • Servo Motor control 25V to 100V/Sec
  • What is the Efficiency servo Stabilizer?
    • Able servo stabilizer Efficiency above 98% (Efficiency=output power/input power*cosφ)
  • What is protection to use in your Stabilizer?

    Output Low / High Voltage, Input Low/High Voltage, OverLoad, Short Circuit,Phase reverse, Earth to Neutral leakage, Single phase failure.

  • What is unbalanced model servo stabilizer?

    The voltage sensing, correction With Each Phase Separate Motor control is done in each phase independently with respect to the neutral is also called as unbalanced type voltage stabilizers. Each Phase is different input voltage (Ex R-200V,Y-210V,B-220V But All Output 230V±1%) / LT Supply this type is suitable. Protections also sense each phase separately, single phase & Three phase both type of load suitable

  • What is balanced model servo stabilizer?

    The voltage sensing any 2 Phase & correction All Phases with common Servo Motor control is called as balanced type voltage stabilizers. All Phases Equal input voltage (Ex RY-330,YB-330V,BR-330V),HT /and OLTC with 3 Phase Load is suitable. Protections also sense each phase separately. Single phase load is not suitable for this type of stabilizer.

  • What is Servo Voltage Stabilizer /Servo Controlled Voltage stabilizer?

    Servo Stabilizer Consist of Servo Motor, Variac with Carbon Brush, Buck Boost Transformer, Servo Control PCB, Contactor / relay. In servo Stabilizer the servo motors involved with help of PCB, Auto Transformer and Buck Boost Transformer there is a small delay in voltage correction. However, output voltage accuracy is usually ±1% with input voltage variation of up to10% to ±50%,ABLE is the one of top most Servo stabilizer manufacturer in India with a tolerance of +/- 1% with high/low output voltage cut-off and overload cut-off. This ensures smooth operation and longer life for the equipments.

  • Where/why we use oil cooled servo stabilizer / Advantage of oil cooled stabilizer?

    Servo Stabilizer is mainmoving parts is dimmer, Dust Area the use are appear in Variac,So Variac is not move smoothly due to dust (there is possible of getting fire through sparking in dust area use Air Cooled),In dust area and Higher capacities oil cooled servo stabilizer is suitable Ex. Textile Unit, Garment Division,Foundry Unit, wood industries and pattern shop.

  • What is purpose of oil in oil cooled Stabilizer?

    Transformer Oil Grade IS 335, It is used only Stabilizer Cooling Purpose

  • When will oil Filter or oil replace oil cooled servo stabilizer?

    Depending on Usage 5 To 10 years Only Filtering Required, but oilReplacing 10 to 15 years only Depending on usages

  • What is maintenance /preventive maintenance required in servo stabilizer?
    • Every 6 Month Carbon Brush Check/ Replace
    • Erery 3 Month Clean from dust
    • Every 6 Month Motor Alignment /Variac Moment check
    • Yearly Once Check All Bolt/ Nut
    • Oil Cooled Stabilizer Check Carbon Brush / Oil every 2years