- Servo Stabilizer -

Product Description

AC mains voltage fluctuations are a common phenomenon in power supply system. Such fluctuations may result into erratic behavior, malfunction or even break down leading to expensive repairs, production loss and missed commitments.

Servo Voltage Stabilisers are designed to ensure that their output voltage remain constant irrespective of the voltage swings in the incoming power supply.

Their high efficiency and the ability to withstand instant load variations make them an ideal choice for protection of expensive and sensitive equipment.


Output Voltage Accuracy: 1%
Response Time: <10 m.sec
Rate of Correction: Upto 70V/Sec
Frequency: 47-53 Hz
Efficiency: Better than 98%
Effect of load power factor: Nil
Wave form distortion: Nil(same as input)
Harmonic distortion: None
Construction: IP21
Color: RAL-7035(Grey)

Unbalanced Line and Load: Independent phase sensing and control provides for 100 % load imbalance

Environment: Temperature range – 0 to 45 °C. Suitable for indoor Tropical use 90% RH (non-condensing)

MCB/MCCB #: At Incoming for Over Load and Short circuit protection.

  • Micro Controller based Fast Signal Processing circuit.
  • High Torque Low Inertia AC Synchronous Motor.
  • Rate of Correction up to 70 V / Seconds.
  • Response time less than 10 m seconds.
  • Energy Efficient – Low losses with Efficiency better than 98%.
  • Auto / Manual & Lower Raise controls.
  • Advanced electronic circuits to maintain constant output voltage even on DG.
  • LCD Display for 3 Phase Electrical parameters like – Input-Output Voltages L-N & L-L / Output-Load Current / Frequency, Various faults display, and display current Stabiliser Status.
  • Last 100 tripped faults log to check performance history.
  • Per Phase settable Input under & Over Voltage Fault indication and Time delayed tripped.
  • Per Phase settable Output under & Over Voltage Fault indication and Time delayed tripped.
  • Per Phase settable Over load,Fault indication and Time
    delayed tripped
  • Input Phase missing or Phase Reversal Instant Tripping
  • Protection against Incoming Neutral / Earth missing Instant Tripping.
  • Limit switches for Servo Motor at extreme input low and high.
  • Time delayed Auto start, for stable Voltages at Output
  • Earth Leakage / Ground Fault Monitoring with Trip and Indication
  • Surge Protective Device 8/20 micro sec. as per IEC 61000-4-4 / 61000-4-5
  • Surge Suppressor (Metal Oxide Varistor).
  • Stabiliser By pass Switch in case of emergency
  • High Low Frequency Cut off.


TypeRatingsServo MotorInput VoltageOutput Voltage
1 Phase1 – 20 KVAAC Synchronous
Servo Motor
170 – 270220\230\240
150 – 300220\230\240
3 Phase
Air Cooled
6 – 100 KVAAC Synchoronous
Servo Motor
340 – 480380\400\415
360 – 480380\400\415
300 – 500380\400\415
3 Phase
Air Cooled
30 – 1500 KVAAC Synchoronous
Servo Motor
340 – 480380\400\415
360 – 460380\400\415
300 – 500380\400\415