Rail Mounted Power Network Meter

The N43 meter,assembled on a rail, is a programmable digital instrument designed for the measurement of 3-phase, 3 or 4-wire power network parameters in balanced or unbalanced systems. The measured values are displayed on a dedicated LCD display. The meter enables control and optimization of the power electronic devices, systems and industrial installations. The meter can be used for measuring: RMS of voltage and current, active, reactive and apparent power, active and reactive energy, power factors, frequency,THD and averaged values P Demand – “power guard”, S Demand, I Demand /15, 30 or 60 minutes/. Voltages and currents are multiplied by given voltage and current ratios of the measuring transformers /for indirect
connections/. Power and energy indications take into account all programmed ratio values. The value of each measured value can be transmitted to the master system via the RS-485 interface. Three relay outputs signal the overfl ow of the chosen quantity, and the pulse output can be used for the consumption check of 3-phase active energy.

There is a galvanic separation between following units of the meter:
– supply,
– voltage and current inputs,
– RS-485,
– USB,
– pulse output OC,
– alarm outputs.