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1. APPLICATION
The N20D meter is a digital programmable panel meter destined for
the measurement of single-phase power network parameters (2-wire
network) and 3-phase, 3,4-wire network in balanced and unbalanced
systems with the simultaneous display of measured quantities on a LCD
display. The meter enables the control and optimization of power elec-
tronics devices, systems and industrial installation operations.
The meter ensures the measurement of: rms values of voltage and
current, active, reactive and apparent power, active, reactive ener-
gy, power factors, frequency, 15, 30, 60 minutes’ mean active power,
archive of power profile, THD and harmonic measurements. Additio-
nally, the current value in the neutral wire is calculated. Voltages and
currents are multiplied by given voltage and current ratios of measuring
transformers. Indications of power and energy take into consideration
values of programmed ratios. The value of each measured quantity
can be transmitted to the master system through the RS-485 interface.
The relay output signals the overflow of the chosen quantity, and the
pulse output can be used for the consumption check of 3-phase active
and reactive energy.
The meter has additionally a continuous current output.
The meter has a galvanic separation between respective blocks:
- supply,
- measuring inputs,
- voltage and current inputs,
- analog output,
- RS-485 output,
- impulse output.
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