Servo Stabilizer (Three Phase)

Servo Stabilizer (Three Phase)


  • Quick response time 10 milli sec (half a cycle)
  • Very high efficiency above 98%
  • Excellent regulation - as high as ± 0.5%
  • Micro Controller based controlled system
  • Wide input range of operation & high speed of correction


  • Single phasing prevention
  • Output electronics 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

Indication in LCD display

  • Input high and input low
  • Output on indication
  • Output high cut off and output low cut off

Programmable Parameters

  • Output voltage set (210 - 245V)
  • Output low voltage cut off
  • Output high voltage cut off
  • Input low on LCD display
  • Input high on LCD display
  • Sensitivity / Regulation
  • Over load cut off
  • CT full scale

Metering on LCD display

  • 3Phase input voltage phase to phase and phase to neutral
  • 3Phase output voltage phase to phase and phase to neutral
  • System frequency
  • Output current on each phase

Programmable control timing

  • Over load cut off time
  • Auto restart time
  • On & Off delay time


Input Voltage 295 - 470V
Input Frequency 50Hz ±6%
DC Bus 180, 192, 240 & 360V DC
Rectifier SCR - SCR
Charger SCR charger
Input PF > 0.97
Charging current As per battery capacity
Charging voltage As per battery capacity
Ripple without battery < 1%
UPS output voltage 400VAC @ Three phase
Regulation ± 1%
Frequency 50Hz ±0.1
Waveform Pure sine wave
Total harmonic distortion < 2% minimum for linear load, 5% for non linear load
Overload capacity 125% for 10mins, 150% for 1sec
Inverter Type IGBT based PWM with instantaneous sine wave control
Crest Factor 3:01
Duty cycle Continuous
Manual bypass Provided
Power factor 0.9
Inverter Efficiency > 93%
Converter Efficiency > 94%
Converter protection MCB and HRS Fuse, soft start for 0-60 sec from input power
Inverter protection MCB and HRS Fuse,high speed pulse by pulse electronic over voltage / under voltage production, over current trip with reset
LCD Display Output voltage, DC voltage, Load in watt, batter low, Output low / high, overload

Note:   * Specifications are subject to change without notice.

              *Image shown are just indicative