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Frequency and voltage monitoring relay NA003 - CEI 0-21

  • General
  • Documentation

The TELE NA003 serves as grid and system protection for supplying cogeneration units, wind power stations, hydroelectric power plants, and photovoltaic systems.

In the event of a power failure or a fault in the grid of the energy supply company, private small power plants must immediately be isolated from the public grid to prevent accidental infeed. For one, maintenance personnel could be endangered without immediate grid separation, and secondly consumers could be exposed to impermissible voltages and frequencies.

In case the grid operator requires threshold values that deviate from the standards, it is possible in part to set some of the threshold values outside of the standard defined range.

Outside of this range the device is no longer in compliance with standards and the corresponding certificates lose their validity. This status is shown on the display by the identifier "ncnf." Settings outside of this range are therefore within the operator's scope of responsibility and/or the delivery point of the system.

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