Lumel ND20 network parameter meter User’s Manual

Below you will find brief information for network parameter meter ND20. The ND20 is a digital programmable panel meter designed for measuring 3-phase 4-wire network parameters in balanced and unbalanced systems. It simultaneously displays measured quantities and digitally transmits their values. The meter enables the control and optimization of power electronics devices, systems, and industrial installation operations. It measures RMS values of voltage and current, active, reactive, and apparent power, active and reactive energy, power factors, frequency, mean active power (15, 30, 60 minutes), power profile archive, THD, and harmonic measurements. The ND20 features a galvanic separation between supply, measuring inputs, voltage and current inputs, analog output, RS-485 output, and impulse output.

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Lumel ND20 Network Parameter Meter Manual | Manualzz

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Key features

  • 3-phase 4-wire network parameter measurement
  • Simultaneous display of measured quantities
  • Digital transmission of measured values
  • Measurement of RMS values of voltage and current
  • Active, reactive, and apparent power measurement
  • Active and reactive energy measurement
  • Power factor, frequency, and mean active power measurement
  • Power profile archive
  • THD and harmonic measurements
  • Galvanic separation between functional blocks

Frequently asked questions

You can program the ND20 meter using the free LPCon software available on the Lumel website. The software allows you to configure various parameters, including output settings, alarm settings, date and time, and THD measurements.

The ND20 meter supports various alarm types, including n-on, n-OFF, on, OFF, H-on, H-OFF, and AL1-3. Each alarm type offers different triggering conditions and hysteresis thresholds.

The ND20 meter has an archive that stores up to 9000 measurements of mean active power. The archive is organized as a circular buffer, so once the buffer is full, the oldest data is overwritten.

You can access the archived data through the RS-485 interface. The archive data is stored in registers 1000-1077, with the oldest data stored at register 1000 and the youngest at register 1001.
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