Voltage variations are an increasingly common and dangerous nuisance that can damage electronic components like power supplies, drives, PLCs, controllers etc. Their effects are widely felt in CNC, Printing, Textile machines in addition to Laboratory, Data processing, Medical & Telecommunication equipments. As an effective solution, UCPL has designed state of the art Voltage Stabilizers to protect these equipments against voltage variations and offering improved power quality, thereby minimizing break downs of costly equipments.

Our Stabilizers are manufactured out of prime grade of magnetics & electrical conductors, housed in enclosures manufactured on CNC machines & powder coated as per IS/BS standards. Stringent quality assurance programme at various stages of manufacturing ie. raw materials, sub assemblies, assembly & finished goods ensures high reliability & consistent performance.

Our Servo voltage stabilizers provide controlled & desired output voltage against wide range of voltage fluctuations. Apart from protecting the equipments from damage, they save energy during high voltage conditions.


  • 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/LCD Indications
  • 3ph output on indication
  • Phase Reversal indication
  • over Load indication


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


  • Output voltage set ( 210-245V)
  • Output Low Voltage Cutoff( 210-245V)
  • 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


  • Display Scrolling – Auto / Manual
  • Start / Stop Buttons
  • Menu / Start / Stop / Reset / Log Button


  • Quick response time 10 milli sec (half a cycle)
  • Very high efficiency above 98%
  • Excellent regulation as high as +/- 0.5%
  • “Micro controller” controlled system
  • Wide input range of operations & high speed of correction

Metering On LCD Display

  • 3ph Input voltage ph to ph and ph to Neutral
  • 3ph Output voltage ph to ph and ph to Neutral
  • System Frequency
  • Output Current on each phase
Input Voltage Range 300 - 460V / 340 - 480V / 360 - 460V AC 3 Ph
Output Voltage (3 Ph) 415V AC
System Unbalanced 4 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
Normal Operation Temperature 0° C to 45° C
Climate Conditions 90% Rh Max. Non Condensing at 350C
Type of Cooling Natural air cooled up to 600 KVA
Mode of system Fully Automatic
System Construction As per IS : 9815 – 1994