3-phase power network meter/analyzer ND1

Description

PRODUCT DESCRIPTION

The ND1 3-phase power analyser is an up-to-date device allowing the user to measure and recording electrical energy quality parameters. It enables to detect interferences in internal industrial electric installations.

See its successor – ND40

Product received also the prestigious award EUROPEAN MEDAL, which is granted for products, that fulfill legally required standards,
appropriate licenses and patents enabling their sale on the European market.
 
Data recorded by the ND1 analyser provide information for costs control systems and optimization o device operation in power energy installations and industrial systems.

The device design unites in itself the function of 5 instruments:

• analyser of 3-phase network parameters,
• universal measuring transducer,
• recorder of measuring data,
• web server – possible an easy remote monitoring of measuring and archival
• data  through the internet browser
• controller – automatic control of electric energy key parameters.

The ND1 analyser-recorder is characterized by following features:

Measurement

Measurement and recording of electric energy quality parameters acc. to the EN 50160 standard, over 300 other parameters of 3-phase power networks, i.e.:

• phase voltages U1, U2, U3 and line currents I1, I2, I3,
• phase-to-phase voltages U12, U23, U31,
• phase active powers P1, P2, P3,
• phase reactive powers Q1, Q2, Q3,
• phase apparent powers S1, S2, S3,
• active power factors PF1, PF2, PF3,
• reactive/active power factors tgj1, tgj2, tgj3,
• mean phase-to-phase voltage US Umf,
• current in neutral wire and mean 3-phase current IO, IS,
• 3-phase active, reactive and apparent powers P,Q,S,
• mean 3-phase power factors PF, tgj,
• frequency f and frequency deviations,
• 15-minutes’ mean active power PAV,
• 3-phase active, reactive and apparent energy EnP, EnQ, EnS,
• active, reactive and apparent energy from an external counter EnPz, EnQz, EnSz,
• THD for phase and current voltages,
• harmonics of currents and phase voltages up to the 51st,
• storage of minimal and maximal values,
• recording of drops and voltage decays.

Data Recording

•   Replaceable external  CompactFlash memory  of 4 GB capacity,
•   Data storage in the internal 6 MB buffer with data supporting (before and after emergency states),
•   Recording of  decays and voltage drops acc. to the EN 50160 standard,
•   Recording of selected measured parameters.

User’s Interface – GUI

•   LCD TFT 5,7”, 320 x 240 pixels color screen, with touch screen panel,
•   Casing protection grade from the frontal side: IP65
•   Dedicated visualization in the shape of: digital displays, analog views, bargraphs, harmonic charts, vector diagrams, statistics, logic inputs
•   Programming of the analyzer visualization ( selection of the measured quantity  and kind of presentation),
•   Contextual help in the user’s configuration menu.

Communication

• Ethernet 10 Base-T, Modbus TCP/IP,
• USB 1.1 Device,
• RS-485 Modbus Slave.

SPECIFICATIONS

Measured quantities and measuring ranges:

Kind of input	Measuring range	Parameters	Basic error
Voltage input	57.7/100V, 230/400 V or 400/690 V	0.05…1.2 Un	± 0.2%
Current input	1A or 5A	0.005…1.2 In	± 0.2%
Logic input	12 inputs: 0/5…24 Vdc	switch frequency up to 50 Hz

Outputs
Output type		Properties
Analog output		4 programmable current outputs of 0/4…20mA, load resistance < 500 Ω
Relay output		• 6 programmable electromagnetic relays • voltageless NOC contacts, load capacity: 250 Vac/1A ac
Output to supply object transducers		• 2 ouptuts of 24 Vdc/30mA
Digital Interface
Interface type		Properties
RS-485		2 interfaces: MODBUS slave and master, baud rate: 300…256000 bit/s, transmission mode ASCII/RTU
USB		Device C.1.1, USBB-G socket
Ethernet		10 Base-T, RJ45 socket, Modbus Slave TCP/IP
Rated Operating Conditions
Supply voltage	85…230…253 V a.c./d.c., 40 .. 400 Hz or d.c.	power consumption ≤ 30VA
Ambient temperature	Work: 0…23…50°C	Storage: -20…60°C
Relative humidity	< 70%	Condensation inadmissable
Reaction against	supply decays	Data and device state preservation
supply recovery	Continuation of device work
Short term load (5s)	2 Un (max. 1000 V)	10 In
Casing protection grade	From frontal side: IP 65	From terminal side: IP20
Safety requirements	Installation catagory: II	EN 61010-1
	Pollution grade: 2
Maximum phase to earth operating voltage	From the measuring system, relays and supply: 500 V
	For RS485 and USB interfaces: 50V
Measuring ranges and admissible basic conversion errors
Measuring quantity	Range	Basic error	Remarks
Voltage U	57.73/100.0 V (Ku=1) 230.0/400.0 V (Ku=1) 400.0/690.0 V (Ku=1) 400.0 kV (Ku≠1)	± 0.2 %	Ku = 1…4000
Current I	1.000 a (kI=1) 5.000 a (kI=1) 100.0 kA (Ki≠1)	± 0.2 %	Ki = 1…20000
Active power P Mean active power Pav	0.0… (-) 6000,0 W 999.00 MW (Ku≠1, Ki≠1)	± 0.5 %
Apparent power S	0.0…6000.0 VA 999.00 MVA (Ku≠1, Ki≠1)	± 0.5 %
Reactive power Q	0.0… (-) 6000.0 Var 999.00 Mvar (Ku≠1, Ki≠1)	± 0.5 %
Active power factor PF	-1.000…0…1.000	± 0.5 %	PF = Power Factor = P/S
Coefficient tgφ	-10.00…0…10.00	± 1 %	Ratio of active power to reactive
φ angle between U and I	-180°…180°	± 0.5 %	Evaluated from the power triangle
Frenquency f	45.00…66.00 Hz	± 0.1 %
THD U, THD I Harmonics U, I (up to 51st)	0.200.0% 0.100.0%	± 2 %	Error in the range 10…120 % U, I
PST, PLT	0…20	± 0.5 %	in range of 0.05…35 Hz
Active energy EnP	0…(-) 99 999 999.9 kWh	± 0.5 %
Reactive energy ENQ	0…(-) 99 999 999.9 kvarh	± 0.5 %

Where:
Ku	voltage transformer ratio
Ki	current transformer ratio
THD U	total coefficient of voltage harmonic distortion
THD I	total coefficient of current harmonic distortion

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