ISO 9001: 2008 certification

Variac Type Servo Stabilizer

Servokon is a preeminent manufacturer and supplier of Variac type servo stabilizer that are used basically to provide a constant output voltage with accurate stability. These are suitable for most of the electronics and electrical applications. We understand the fact that voltage fluctuation may result into damaging of electric appliances or device. In addition, it may also affect the productivity. But, the range of servo stabilizers offered by Servokon protects all the equipments and also ensures a continuous and smooth production.

These stabilizers are equipped with advanced digital micro processors that have been designed to provide constant output voltage. Long life, better regulation, compact size, advanced design and high performance are some of the key features for which these stabilizers have been highly appreciated by our domestic and international clients.

Technical Specification

Rating Upto 3000 KVA
Input Voltage Range (phase to Phase) 270V - 460V, 250V - 460V and 150V - 460V (Can be Customized)
Output Voltage Range (phase to phase) 380 / 400 / 415 +/- 1%
Output Waveform True to Input
Input Frequency 45 - 55 Hz
Response Time 10 m. sec.
Correction Speed 25 - 65 V/Sec
Correction Methods Step less Correction Using Variac
Cooling Oil Natural Air Natural (ONAN)
Efficiency Better Than 98%
Control Circuit Fully Automatic IC Based Solid Stat, Glass Epoxy Control Card for easy on Line Serviceability
Duty Cycle 100%
Operation Auto / Manual
No Load Loss Less than 0.5%
Compatibility to DG Set Specially Designed Control Card for faithful operation on Mains as well as DG Set
Suitability Suitable for 3 phase Unbalanced/Balanced Supply, Unbalanced / Balanced Loads
Operating Temperature -15°C to 45°C above Ambient
Additional Features (at Extra Cost) * High & Low Voltage Cutoff System
* Over Load And Short Circuit Protection 
* Single Phase Prevention System
* Phase Sequence change protection
* Change over switch to By-Pass the system
* Earth Fault Protection
* Surge & RS Suppression System
* 110 Volts Output for Special Equipment.


  • Minimizes unwanted loss
  • No extra power is required to increase or decrease the voltage
  • Constant output voltage stability with +/-1%
  • Reduced MDI
  • Optimum drawing of the current


The Variac Type Servo Stabilizer is used for protecting electrical appliances for fluctuating voltage in the power supply.