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Servo Voltage Regulators (SCVR)

Optional Features
  • MCCB/MCB.
  • Bypass switch.
  • Change over switch for generator.
  • Customize as per customer's specification.
Salient Features of SCVR
  • Digital meters.
  • In house fabrication.
  • Totally control by micro controller based unit.
  • Design for hassle free maintenance detachable units.
  • It makes electronic measuring and control unit for higher reliability.
  • Programming through key pad instead of conventional pots and toggle switches.


It has recently introduced a new series of Servo Voltage Regulators with latest micro-controller based technology to upgrade and ensure higher accuracy reliability and hassle free maintenance.

Servo Controller Voltage Regulators (SCVR), a technical overview

SCVR 's are simple high speed electromical device that provides accurate constant A.C. output.

Principle of Operation

Basic electrical block diagram of SCVR has been shown in figure-1. SCVR consists of variable auto transfomer, buck-boost transfomer and servo motor Along with control circuit. Servo motor plays vital role to control desire output voltage, it will work as per control signal given by electronic circuit. Hence Micro controller based electronic circuit will enhance accuracy and reliability.

Control circuit (SCU) put a photo of SCU here
  • SCU has saliant features like.
  • DIN size enclosure (72 x 72).
  • It has seven segment display.
  • It has facility to see input voltage.
  • It measure and display true rms voltage.
  • SCU display output voltage (Single Phase)
  • Over voltage limit can be programmed from SCU.
  • Hasseel free replacement as it is detachable unit.
  • Desired output voltage can be programmed by SCU through programming key pad.
  • It has design and developed a unique control unit (SCU) with latest micro controller based technology.
Types of SCVR

It has SCVR for both single and three phase load in three phase supply condition.SCVR are availabel in two different configurations.

Balance Type

In balance type SCVR a single three phase auto transformer will control output voltge. it means in case of any unbalance in input voltage supply, it will reflect same into output voltage.

Unbalance Type

In unbalance type SCVR, three separate auto transformer will control individual phase. thus it will give balance output inrespective of input supply condition.

Sechnical Specifications
Input Voltage 170 V to 270 V (For Singe Phase)
360 V to 460 V (For Three Phase)
Or as per customer's requirement
Output Voltage 215 VAC +/- 1% for single phase
415 VAC +/- 1% for three phase
(This range is programmable)
Rate Of Correction Up to 100 VAC.
Efficiency 98 %
Wave from Distortatoin Nil
Cooling Air cooled upto 100 Kva
Oil cooled above 100 Kva
Standard As per IS: 9815-1981 tested at CPRI Bangalore
Display Parameter Volt (Line to line and line to neutral)
Ampere (With seperator switch)
Frequency
Protection Over voltage, undervoltage, Electronic Overload, Single Phasing Prevention.
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