Datasheet ND20

Product catalog summary

Overview: The ND20 is a meter designed for measuring network parameters in balanced and unbalanced systems with 2, 3, or 4 wires. It offers high accuracy and various functionalities for monitoring and recording power network parameters.

Specifications:

Measures power network parameters with high accuracy in both balanced and unbalanced systems.
Supports 2, 3, or 4-wire configurations.
Features a backlit 3.5” LCD screen and IP65 protection from the front.
Digital transmission via RS-485 interface using MODBUS protocol.
Configurable analog, alarm, and pulse outputs.

Measurement Capabilities:

Current measurement ranges from 0.002 to 6.000 A with a basic error of ±0.2%.
Voltage measurement ranges for L-N and L-L with basic errors of ±0.2% and ±0.5% respectively.
Frequency measurement from 47.0 to 63.0 Hz with a basic error of ±0.2%.
Active, reactive, and apparent power measurements with a basic error of ±0.5%.
Power factor, tangent, and cosinus measurements with a basic error of ±1%.
THD measurement for currents and voltages with a basic error of ±5%.

Features:

Includes a watt-hour meter for selected harmonics.
Profile recording for 15, 30, and 60-minute intervals (up to 9000 measurements).
Galvanic isolation and password protection for enhanced security.

External Features:

Compact design with dimensions of 96 x 96 x 77 mm and a weight of less than 0.3 kg.
Protection grade IP65 from the front and IP20 from the terminal side.

Operating Conditions:

Supply voltage ranges from 85 to 253 V AC and 90 to 300 V DC.
Operating temperature ranges from -25°C to 55°C, with storage temperatures from -30°C to 70°C.
Relative humidity tolerance from 25% to 95% without condensation.

Safety and Compatibility:

Complies with electromagnetic compatibility standards EN 61000-6-2 and EN 61000-6-4.
Meets safety requirements according to EN 61010-1.

Ordering Information: The ND20 can be customized with various options for current input, voltage input, analog output, supply voltage, language, and quality inspection requirements.

Catalog excerpts

DITEL$>L U M E L ND20 - METER OF NETWORK PARAMETERS • Measurement of power network parameters in 2,3 or 4- wire balanced and unbalanced systems. • High accuracy class. • Indications considering values of programmed ratios. • Harmonics of voltages and currents (selectively). • THD factors for currents and voltages. • Profile of 15, 30, 60-minutes' power (9000 measurements). • Watt-hour meter for the selected harmonic. • Backlit LCD 3.5" screen. • Protection grade from the frontal side: IP65. • Digital transmission to the master system through the RS-485 interface (MODBUS). • Configurable analog, alarm and pulse outputs (energy). • Configuration of displayed pages. Measurements, monitoring, recording of network parameters and energy. measured quantities and measuring ranges * Depending on the set tr_U ratio (ratio ofthe voltage transformer: 0.1...4000.0) and tr_I ratio (ratio ofthe current transformer: 1...10000) r - of the range mv - of the measured value

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ND20 - METER OF NETWORK PARAMETERS Made by OUTPUTS Analog output Relay output Pulse output of active/reactive energy 1 programmable current output 0/4...20mA programmable relay output, normally open voltageless contacts, 250 V~/0.5 A~ 1 x OC type, passive DIGITAL INTERFACE Interface type RS-485 Transmission protocol MODBUS RTU EXTERNAL FEATURES Readout field Weight Overall dimensions Protection grade (acc. to EN 60529) LCD 3.5” screen, specialized, monochromatic with backlit < 0.3 kg 96 x 96 x 77 mm panel cut-out: 92.5+0.6 x 92.5+0.6 mm from frontal side: IP65 from terminal side: IP20 eCON software...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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