3 Phase Air Cooled Servo Controlled Voltage Stabilizers

3 Phase Air Cooled Servo Controlled Voltage Stabilizers

Provides perfectly stable output even under severe conditions of unbalanced voltage conditions. Ideal to protect the electrical and electronic equipments from high and low voltage.


  • Single Phasing Prevention
  • Output Electronic Over Load Protection
  • Phase Reversal Protection
  • Input Short Circuit Protection with MCB
  • Input Over Load Protection with MCB
  • Output Low Voltage Protection
  • Output High Voltage Protection
  • Audio Alarm for Protections


  • Mains Input on 3 LED Indications,
  • 3ph output on indication
  • Phase Reversal indication
  • over Load indication

Indications in LCD Display

  • Input High and Input low
  • Output on indication
  • Output high Cutoff and Output Low Cutoff

Programmable Parameters

  • Output voltage set ( 210-245V)
  • Output Low Voltage Cutoff
  • Output High Voltage Cutoff
  • Input Low on LCD Display
  • Input High on LCD Display
  • Sensitivity / Regulation
  • Over Load Cutoff
  • CT full scale

Programmable Control Timings

  • Over load Cutoff Time
  • Auto Restart Time
  • On & Off Delay Time

Programmable Controls

  • Display Scrolling – Auto / Manual
  • Start / Stop Buttons
  • Menu / Start / Stop / Reset / Log Button
  • Data Log: Last 100 fault events log with Date & Time stamp and works on FIFO basis.
  • Very Important For CSD
  • Analysis Problems
Input voltage range 300 – 460v 340 – 480v 360 – 460v ac 3 ph
Output voltage(3 ph) 415v
Ac system unbalanced
wire r y b n
Connections star
Operating frequency 47 to 53 hz
Output voltage adjustable 380 to 415v ac in 3 ph
Output voltage regulation + 1% (no load)
Output voltage regulation + 1% (full load)
Overload capacity 120%
Correction rate 60 30 25v per sec-3 phase
Waveform distortion nil
Output waveform true
Reproduction of input insulation class f short circuit
Period & percentage 300% for 250 milli sec. 0 0 normal
Operation temperature 0 c to 45 c 0
Climate conditions 90% rh max.
Non condensing 35 c
Type of cooling natural air cooled up to 600 kva
Mode of system fully automatic system
Construction as per is – 9815 1994
  • 1.Quick response time 10 milli sec (half a cycle) very high efficiency above 98% excellent regulation as high as +- 0.5% micro controller
  • 2.Controlled system wide input range of operations & high speed of correction metering on lcd display
  • 3.3ph input voltage ph to ph and ph to neutral
  • 4.3ph output voltage ph to ph and ph to neutral system frequency
  • 5.Output current on each ph protections
  • 6.Single phasing prevention
  • 7.Output electronic over load protection
  • 8.Phase reversal protection
  • 9.Input short circuit protection with mcb
  • 10.Input over load protection with mcb
  • 11.Output low voltage protection
  • 12.Output high voltage protection
  • 13.Audio alarm for protections indications mains input on 3 led indications 3ph output on indication phase reversal indication over load indication