Voltage Controllers

Indian Transformers & Electricals manufacture a wide range of Automatic / Servo Voltage Controllers or LT AVR.



Servo Voltage Controllers or LT AVR

We are leading manufacturers of Industrial Voltage Controllers offering Variac / Dimmer Type and Linear / Rolling Contact Type Servo Voltage Controllers or LT Automatic Voltage Regulators (LT AVR) conforming to IS: 9815/1994 with latest amendments or as per customer's specifications.

These are designed to overcome and control voltage fluctuations due to diverse loading duties and line losses arising in transmission & distrbution network.

Advantages

  • Controlled & Constant Voltage
  • Reduced Failure Rate of Electrical Equipments
  • Improvement in Power Factor & Reduction in MDI
  • Reduction in Down Time / Maintenance Expenses
  • Energy Saver - Reduction in Power Consumption
  • 80% Depreciation under Income Tax Act being an energy saving equipment
  • Short Payback Period
  • Compatible to D.G Sets

Applications

Servo Voltage Controllers are virtually required at all such places where controlled and constant voltage is one of the most important requirements and are suitable where breakdown due to voltage fluctuation results in heavy financial losses such as Hospitals, Laboratories, Various Life Saving & Testing Equipments, Pharmaceuticals, Research Institutes, Defense, Telecommunications, Air Conditioning, Data Processing, Electronics based Industries, Educational Institutes, Food Processing Units, Paper plants, Footwear and Leather Industries, Cement Plants, Textile Industries, Moulding Units, Hotels, Farm Houses, Offices and Residences/ Housing Apartments, etc.


Technical Specifications

  • Variac / Dimmer Type
  • Linear / Rolling Contact Type
  • Input Voltage Range (3 phase)
     
     
  • Output Voltage (3 phase)
     
  • Average Correction Rate
     
     
  • Response Time
  • Freq. Range
  • Efficiency
  • Temperature Rise
     
  • Type
     
  • Operating Mode
  • Oil Filled Type
     
     
  • Dry Type
  • Contol Panel
     
     
     
     
  • Protections (optional as per customer's requirement)
     
     
     
     
     
     
 


  • Up to 2000 KVA Capacity
  • Up to 5000 KVA Capacity
  • 210-480V, 260-480V, 300-480V, 300-460V, 320-460V, 340-480V, 340-460V, 360-460V or as per customer's requirement
  • 380/400/415V +/- 1% or as per customer's requirement
  • High speed stepless correction upto 32V/sec. (phase to phase) depending upon the capacity & input voltage range
  • 10 ms
  • 50 Hz +/- 3
  • > 98% in all models above 15 KVA
  • Max. 40°C in Oil Cooled Type and Max. 65°C in Air Cooled Type
  • Suitable for both balanced / unbalanced Supply & Load
  • Both Auto and Manual Mode
  • ONAN (Oil Natural Air Natural) cooled. T. oil conforming to IS:335/1994. T. oil used is doubly vacuum filtered & dehydrated
  • AN (Air Natural) cooled
  • -  Voltmeter toggle switch to read input/output
    -  Voltage Input low/high and power on indicators
    -  Manual operation increase/decrease push switch
    -  Manual/Auto operation toggle switch
    -  IC based solid state main control circuit (no relay)
  • a. High / Low Voltage Cutoff
    b. Single Phase Preventor
    c. Automatic Time Delay
    d. Audio & Visual Alarm at Tripping Condition
    e. Reverse Phasing Protection
    f. Spike & Surge Supressor
    g. Servo By-Pass Switch
    h. Short Circuit & Overload Protection

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Automatic Line Voltage Controllers (ALVC)

We manufacture fully Automatic Line Voltage Correctors that are designed to overcome & control voltage fluctuations due to diverse loading duties & line losses arising in transmission & distribution network. Our ALVC conforms to IS: 8448/1989 reaffirmed 2003.

Advantages

  • Ultra Slim
  • Power Saver
  • Space Saver
  • Wall Mounted
  • New Generation Voltage Stablizer
  • Integrated Circuits (IC) based, to increase reliability
  • Elegant Structure to Enhance Your Decor
  • Consists of Toroidal transformers manufectured using latest German Technology . Produces least leakage magnetic flux compared to any other transformer, Any type of interfering fields tend to cancel in a Toroidal core compared with other types of transformers.

Optional Features

  • Intelligent Time Delay for Auto Restart / Manual Start
  • Automatic Cut-off For High/ Low Input Voltage
  • Digital Indications : Input Voltage / Output Voltage/ Output Current (Amp.)

Technical Specifications

  • Input Voltage Range (1 phase)
  • Output Voltage Range (1 phase)
  • Operating Line Frequency
  • Operating Temperature
  • High Voltage Cut Off
  • Low Voltage Cut Off
  • Intelligent Time Delay
  • Tap Selection
  • Indications
  • Input Cable
  • Output
     
 


  • 110-280V AC or 140-280V AC
  • 200-240V AC
  • 50 Hz +/- 3
  • 0 °C to 50 °C
  • 250 Volts +/- 5V AC on output side
  • 190 Volts +/- 5V AC on output side
  • Settable 30 secs. to 3 minutes
  • Through Electro-Mechanical Relays
  • Digital / LEDs
  • 1.5 Metre length
  • 15 Amp., 3 Pin Socket upto 2 KVA
    30 Amp. Terminal Block on above 3 KVA

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