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Automatic Voltage Regulator - Digit@L

Omniverter Automatic Voltage Regulator (AVR) solutions are used to correct voltage variations that cause problems for electrical equipment.

In many parts of the world the quality of electrical power is poor or inconsistent. Voltages can vary significantly from nominal values, typically +15%/-20% or more.

Omniverter Automatic Voltage Regulator (AVR) solutions correct such voltage variations. The voltage stabilizer has proved to be an efficient solution to prevent potential damage due to input voltage fluctuation.

Key Features:
  • Power design based on the maximum input current
  • Regulation based on ‘RMS voltage'
  • Full functionality with load charge variable from 0 to 100%
  • Up to 30% harmonic content admitted on the load current
  • Not dependant on the load power factor
  • Commercial properties, embassy and consulates
  • Industrial processes and telecommunication facilities
Automatic Voltage Regulator
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What is long-term voltage magnitude regulation?

Voltage magnitude variation is either overvoltage or undervoltage.
Utilities tyypically regulate the voltage levels by using transformers with tap changers.
However, automatic tap changers are not always available to regulate the voltage magnitude which can impact the regulation levels as the load change,

What are the causes of voltage variations?

Long electrical lines and overloaded transformers or generators can cause unacceptable variation in voltage magnitude. Voltage unbalance can damage to electrical equipment.

What is over and under voltage limits according to IEEE?

Overvoltage is defined by the IEEE 1159 as an increase in the AC voltage (RMS), typically to 110% - 120% of nominal, for duration longer than 1-minute. 

Undervoltage is described by IEEE 1159 as the decrease in the AC voltage (RMS), typically to 80% - 90% of nominal, for duration longer than 1-minute.

Equipment must operate satisfactorily within the -10% to +10% voltage variation of the Distribution Utility's nominal service voltage.

What is the long-term effect of over or undervoltage variation on equipment?

Voltage fluctuations degrade the performance of electrical equipment. Undervoltage variation increases current and cause overheating, malfunction, premature failure or completed failure of equipment.
Overvoltage variation decreases current flow that reduces efficiency. Circuit boards are designed to operate within a specified voltage range, so overvoltage could cause premature failure of these components.