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Voltage Quality

  • What is a voltage problem?
  • What to do if you have doubts about the voltage quality?
  • Compensations for poor voltage quality

Voltage quality problems usually arise in rural electrical lines built before 1980. At that time, households used electricity almost exclusively for lighting, and electricity was supplied through long low-voltage lines, so that the voltage at the end of the line could be quite low. Modern electrical appliances, however, require quality power.

Improving voltage quality generally implies the building of new medium voltage substations and power lines closer to households. As a network operator, we have to ensure quality voltage up to the supply point at your place of consumption.

How to recognise low voltage or a voltage change?

As a rule, you can identify irregular voltage fluctuations if:

  • light bulbs function below their full capacity;
  • light bulbs flicker occasionally when you switch on a household electrical device;
  • you can only switch on household appliances one at a time;
  • problems occur when a neighbour switches on a powerful household appliance.

What should I do if there are voltage problems?

If you suspect a voltage quality problem in your household, inform us directly by describing the problem as follows:

  • by e-mail to,
  • by calling customer service 777 1545 or
  • by post to Elektrilevi OÜ, Kadaka tee 63, 12915 Tallinn.

Please describe as exactly as possible when the problem started and how and where the voltage quality problem occurs.

We will reply within 10 days. We will come to an agreement regarding the measurement and will notify you of the results in writing.

  • Compensations for voltage problems

    If we detect substandard voltage in your household, we will reduce your network fees by 80% until quality voltage has been restored.

    We use Estonian standard EVS-EN 50160:2010 "Voltage characteristics of electricity supplied by public distribution networks" to define voltage that meets the standard.

We recommend buying protection devices to protect your more sensitive electrical appliances such as televisions and computers against undervoltage and voltage fluctuations. More about preventing damage »