Electrical distribution equipment

Arc protection system

Production area – 16000 m2, number of employees – 320 people
Over the past 61 years produced over 19500 transformer substations, 43500 medium voltage cubicles, 96000 low voltage switchboards
Electrical distribution equipment export to 25 countries
The biggest manufacturer of 0,4-24kV distribution equipment and systems in the Baltic States
The Company founded in 1959

Arc protection system

The new arc protection relay NOLA-03-M with extension unit NOLA-02-S are designed to be used for the protection of medium and low-voltage switchgear to increase personnel safety and minimize equipment damage. The central unit type NOLA-03-M operates independently or together with the extension unit NOLA-02-S. This unit helps to create selective arc protection system increasing number of sensors and extending the area to be protected.

  • Three-phase overcurrent function - as additional criteria for trip decision
  • Loop-type fiber arc sensor for arc detection and light intensity measuring
  • Two high-speed semiconductor outputs for fast tripping (<=2,5 ms), much faster than conventional protection relays
  • Two relay outputs for trip signalization and circuit breaker failure protection
  • Two fiber optic or RS-485 interfaces for the connection of other Master or slave units (up to 16)
  • 5 push-button membrane keyboard for local configuration
  • Informative OLED display and 9 LED indicators for reliable information presenting even at low temperatures
  • USB port for PC configuration, event evaluation and software upgrade
  • Event logs (650 events) and real-time clock
  • Configured by the FREE NOLASET software tool
  • Continuous self-supervision and monitoring of sensor fibers, operating voltages and cabling between master units and slave units
  • Selective tripping of the faulted feeder (with NOLA-02-S)


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