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Nemo 72 Le

Nemo 72 Le
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Nemo 72 Le

Product catalog summary
Specifications:
The document details a multifunctional instrument designed for low voltage networks, specifically a 72x72 mm three-phase line meter. It operates within a voltage range of 80 to 500V (phase-phase) and supports connections via dedicated current transformers (CT). The device allows for programmable external CT and voltage transformer (VT) ratios, measures active energy with class 0.5 accuracy, and supports RS485 communication through ModBus RTU/TCP or BACNET protocols. It includes features such as phase sequence correction, diagnostics, and Ethernet communication interfaces (NT809 - NT891).
Measurement Capabilities:
The instrument measures various electrical parameters including phase and linked voltage, neutral and phase current, current demand, frequency, power factor, and active/reactive/apparent power. It also tracks total/partial positive and negative active/reactive energy, working hours, THDV and THDI, harmonic analysis, phase angles, and min/max phase voltage. The device features a backlit LCD with selectable backlighting and automatic updates.
Programmable Parameters:
Programming is accessible via a password-protected front keyboard with four keys. The menu is divided into two levels: Level 1 includes customized display pages, connection settings, average power/current delay time, display backlighting, RS485 communication, and relay output functions. Level 2 covers external voltage or current transformer ratios.
Ordering Codes and Outputs:
The document lists various models with different output configurations, including pulse/alarm/state switching and RS485 ModBus RTU/TCP or BACNET communication. Auxiliary supply ranges from 80 to 265V AC to 20 to 60V DC.
Technical Details:
The device supports single-phase and three-phase networks with various connection diagrams. It handles a wide range of voltage and current inputs, with specific overload and harmonic distortion capabilities. The instrument includes diagnostic algorithms for phase sequence correction and supports remote relay state switching.
Relay and Pulse Outputs:
Relay outputs can function as energy pulses, alarm contacts, or state switches, with bistable or timed modes. Energy pulse outputs are compatible with S0 EN/IEC 62053-31 standards, with specific contact ratings and associated energy types.
Procedures:
The device includes phase sequence correction and diagnostic functionalities, which can be activated through a password. It requires specific conditions such as correct neutral wire connection and no cable crossings. The relay output can be configured for energy pulses, alarm contact, and remote-controlled switching, with selectable delay times.
Communication Standards:
The device supports Modbus RS485 and BACNET RS485 communication protocols, with galvanic insulation from input and auxiliary supply. It allows for a maximum of 32 devices to be network-connected, extendable to 255 with an RS485 repeater. Ethernet communication is available for specific models with additional interfaces.
Environmental and Housing Conditions:
The device operates within a specified temperature range of -5 to 55°C and is suitable for tropical climates. It features a flush mounting housing with a protection degree of IP54 for the front frame and IP20 for terminals.
Standards and Compliance:
The device complies with EN/IEC 61557-12 for accuracy and EN 61326-1 for electromagnetic compatibility. It has a rated insulation voltage of 300V and is protected against incorrect polarity.
Wiring and Installation:
The document provides detailed wiring diagrams for various network configurations, emphasizing the importance of connecting the auxiliary supply to specific terminals. It also notes that certain features like pulse output and RS485 communication may not be present in all versions.
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Catalog excerpts

Nemo 72 Le-1

MULTIMISURA MULTIMETERING Strumento Multifunzione per reti bassa tensione 72x72 mm Linea trifase 80...500V (fase-fase) Inserzione su TA dedicati Rapporto TA e TV esterni programmabile Energia attiva cl.0,5 Comunicazione RS485 protocollo ModBus RTU/TCP o BACNET Diagnostica, correzioni sequenza fasi Interfacce esterne: Comunicazione Ethernet (NT809 - NT891) Network monitor for low voltage 72x72 mm 3-phase line 80...500V (phase-phase) Connection on dedicated CT Programmable external CT and VT ratio Active energy class 0,5 RS485 communication by ModBus RTU/TCP or BACNET protocol Phase sequence correction, diagnostics External interfaces: Ethernet communication (NT809 - NT891) IMPULSI • PULSE Tensione Tensione di fase e concatenata concatenata Phase and linked voltage Phase linked voltage Tensione Tensione min. e max. di fase max. Min. and max. phase voltage voltage Min. Corrente Corrente di fase e di neutro neutro Neutral current Neutral and phase current Corrente corrente Corrente media e valore max. corrente media valore Current demand and current max. demand Current current Frequenza Frequenza Frequency Frequency Potenza attiva, reattiva apparente Potenza attiva, reattiva apparente Active, reactive phase power Active, reactive power Potenza media e Potenza valore max. potenza media potenza valore Power demand and Power power max. demand power Fattore di potenza Fattore potenza Power factor Power factor Energia attiva reattiva positiva Energia attiva e reattiva positiva e negativa, totale e parziale negativa, totale parziale Total Total and partial, positive and negative partial, positive negative active and reactive energy active reactive energy Ore e minuti di funzionamento funzionamento Ore Working hours and minutes Working minutes THDV e THDI THDV THDV and THDI THDV Analisi armonica Analisi armonica Harmonic analysis Harmonic analysis Fattore di cresta tensione e corrente Fattore cresta tensione corrente Voltage and current crest factor Voltage current crest factor Angolo di fase tra corrente e tensione Angolo tra corrente tensione Angolo di fase tra le correnti Angolo tra correnti Angolo di fase tra le tensioni Angolo tra tensioni Phase angle between current and voltage voltage Phase between current Phase angle between currents Phase between currents Phase angle between voltages Phase between voltages

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Nemo 72 Le-2

MODELLO MODEL LINEA NETWORK Monofase / Single-phase CONNESSIONE CONNECTION Trifase, carico equilibrato Three-phase, balanced load Trifase, carico squilibrato Three-phase, unbalanced load DIAGNOSTICA, CORREZIONI SEQUENZA FASI / PHASE SEQUENCE CORRECTION, DIAGNOSTIC COMUNICAZIONE USCITE VISUALIZZAZIONE INGRESSO COMMUNICATION OUTPUT DISPLAY INPUT VALORI NOMINALI RATED VALUE INGRESSO CORRENTE INPUT CURRENT RAPPORTO PROGRAMMABILE PROGRAMMABLE RATIO ENERGIA ATTIVA ACTIVE ENERGY ENERGIA REATTIVA REACTIVE ENERGY TENSIONE VOLTAGE CORRENTE CURRENT FATTORE DI POTENZA POWER FACTOR POTENZA...

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Nemo 72 Le-3

CODICI DI ORDINAZIONE ORDERING CODE USCITA OUTPUT Impulsi / allarme / commutazione stato Pulses / alarm / state switching Impulsi / allarme / commutazione stato + RS485 ModBus RTU/TCP Pulses / alarm / state switching + RS485 ModBus RTU/TCP Impulsi / allarme / commutazione stato + RS485 BACNET Pulses / alarm / state switching + RS485 BACNET Impulsi / allarme / commutazione stato Pulses / alarm / state switching Impulsi / allarme / commutazione stato + RS485 ModBus RTU/TCP Pulses / alarm / state switching + RS485 ModBus RTU/TCP Impulsi / allarme / commutazione stato + RS485 BACNET Pulses / alarm...

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Nemo 72 Le-4

Inserzione su trasformatori di corrente esterni dedicati Tensione trifase nominale Un: 400-100V (fase-fase) Tensione trifase: 80...500V (fase-fase) Tensione monofase: 50 - 290V HKB* Rapporto TV esterno: 1...10,0 (max. tensione primaria TV 1200V) Corrente nominale In: 5A - 1A Sovraccarico istantaneo: 20 In/0,5s Big* Rapporto TA esterno: 1...9999 (max. corrente primaria 50kA/5A - 10kA/1 A) Frequenza nominale fn: 50Hz - 400Hz (selezione automata) variazione ammessa: 45...65Hz (fn 50Hz) - 360...440Hz (fn 400Hz) Tipo di misura: vero valore efficace Contenuto armonico: fino a 50a armonica (50Hz) Fattore...

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Nemo 72 Le-5

Al fine di poter presentare i dati in modo standard, il contenuto spettrale To show the results in a standard way, the harmonic contents, as in the example, nell’esempio viene attribuito, alla frequenza intermedia piu vicina ovvero 100Hz are correctly attributed to the nearest central harmonic in the range 50... 150Hz that (seconda armonica). is 100Hz (second harmonic). DIAGNOSTICS CORREZIONE SEQUENZA FASI Nel software del dispositivo e presente un algoritmo di diagnostica e di riparazione della sequenza di inserzione voltmetrica ed amperometrica. La funzione e attivabile a richiesta...

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Nemo 72 Le-6

JSP= Contatto uscita rele: norm. aperto o norm. chiuso BSFMsteresi: 0...20% Ijap* Ritardo intervento: 0...99s [gp3Ritardo ripristino: 0...99s Commutazione stato rele (comandato da remoto) modalita bistabile jgp3Contatto uscita rele: normalmente aperto (no) o normalmente chiuso (nC) EP’t on: ritardo tra il comando remoto di attivazione e il cambio di stato del rele jgp=t oF: ritardo tra il comando remoto di ripristino e il cambio di stato del rele valori selezionabili t on / t oF: 0...99s Commutazione stato rele (comandato da remoto) modalita temporizzata HEP3Contatto uscita rele: normalmente...

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Nemo 72 Le-7

AUXILIARY SUPPLY Rated value Uaux ac: 80...265Vac - 48Vac Rated frequency fn: 50 or 400Hz (automatic selection) Working frequency: 45...65Hz (fn 50Hz) or 360...440Hz (fn 400Hz) Rated burden: < 2,5VA (230Vac backlight 30%) Rated value Uaux dc: 100...300Vdc - 20...60Vdc Rated burden: < 2,5W (24Vdc backlight 30%) Protected against incorrect polarity ALIMENTAZIONE AUSILIARIA Valore nominale Uaux ca: 80...265Vca - 48Vca Frequenza nominale fn: 50 opp. 400Hz (selezione automata) Frequenza di funzionamento: 45...65Hz (fn 50Hz) opp. 360...440Hz (fn 400Hz) Autoconsumo: < 2,5VA (230Vca backlight 30%) Valore...

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Nemo 72 Le-8

SCHEMI D’INSERZIONE WIRING DIAGRAMS Linea Monofase Single phase network Linea Trifase 3 Fili 1 SIstema Three-phase 3-wires network 1 System Linea Trifase 4 Fili, 1 Sistema Three-phase 3-wires network, 1 System Linea Trifase 3 fili, 2 Sistemi Three-phase 3-wires network, 2 Systems INPUT CURRENT 3-3E Linea trifase 3 fili 3 Sistemi Three-phase 3-wires network, 3 Systems

 Open the catalog to page 8

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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.