1. Introduzione
The Acrel ADL400 three-phase electric meter is designed for accurate energy measurement in low voltage systems. This meter complies with the technical requirements for electronic meters as specified in the IEC62053-21 and IEC62053-22 standards, ensuring reliable performance for energy management applications.
2. Informazioni sulla sicurezza
WARNING: Installation and maintenance should only be performed by qualified electrical personnel. Ensure all power is disconnected before installation or servicing to prevent electric shock or damage to the equipment.
- Rispettare sempre le normative elettriche locali e nazionali.
- Non utilizzare il dispositivo se appare danneggiato.
- Tenere il dispositivo lontano dall'umidità e dalle temperature estreme.
3. Prodotto finitoview
The ADL400 is a compact DIN rail mountable energy meter featuring an LCD display and intuitive button controls for easy operation and parameter viewing.

Figura 3.1: Fronte view of the ADL400 Energy Meter
3.1. Componenti e display
The meter features a 12-bit section LCD display with a backlight for clear readings. Control is managed via three front-panel buttons:

Figura 3.2: Funzioni dei pulsanti
- Pulsante Su (▲): Used to navigate up through menus, check voltage and current, and move the flashing cursor leftward in programming mode.
- Pulsante Giù (▼): Used to navigate down through menus, check power, and change the flashing value in programming mode.
- Enter Button (↵): Used to enter menus, check energy, access the in/out programming menu, and save changes.
4. Specifiche
| Categoria | Parametro | Valore |
|---|---|---|
| Misurazione | Cablaggio | 3 fasi 3 fili, 3 fasi 4 fili |
| Volume nominaletage | 3x380~456Vac L-L (direct connect); 3x100~120Vac L-L (via PTs) | |
| Corrente nominale | 3x10(80)A AC (direct connect); 3x1(6)A AC (via CTs) | |
| Frequenza | Frequenza | |
| Accuracy Class (kWh) | 0.5 | |
| Misurazione dell'intervallo di energia | 0-99999.9kWh | |
| Parametri di misurazione | U, I, P, Q, S, PF, F, Harmonics (2~31st) | |
| Voltage Impedenza | >2 MΩ | |
| Consumo attuale | <1VA Corrente nominale monofase | |
| Tipo di visualizzazione | Schermo LCD | 12 Bits Section LCD Display |
| Comunicazione | Interfaccia | RS485 |
| Protocollo | MODBUS-RTU | |
| Velocità in baud | 1200 bps ~ 19200 bps | |
| Ambiente | Temperatura di esercizio | -25℃~+55℃ |
| Umidità relativa | ≤95% RH (No condensation) | |
| Fisico | Dimensioni | 72*90*65mm |
| Installazione | Montaggio | Guida DIN da 35 mm |
| Alimentazione elettrica | Tipo | AC |
| Batteria | Incluso | SÌ |
| Garanzia | Periodo | 2 anni |
5. Configurazione e installazione
5.1. Physical Installation (DIN Rail)
The ADL400 meter is designed for easy installation on a standard 35mm DIN rail.
- Push off the buckle: Locate and push off the buckle on the back side of the meter.
- Installazione su guida DIN: Position the meter onto the 35mm DIN rail, aligning the slot behind the meter with the rail.
- Buckle up: Secure the meter by buckling up the latch to fix it firmly onto the DIN rail.
- Verifica installazione: Ensure the meter is securely installed and does not wobble.

Figure 5.1: DIN Rail Installation Steps
5.2. Schemi elettrici
Proper wiring is crucial for accurate measurement and safe operation. Refer to the following diagrams based on your connection type.
5.2.1. Terminale sopraview

Figure 5.2: PIN/Terminal Overview (Direct Connect Type)

Figure 5.3: PIN/Terminal Overview (CT Operated Type)
5.2.2. Direct Connect Wiring

Figure 5.4: Power Wiring: 3-phase 4-wire via direct connect. Meters must be installed according to the indicated current direction.

Figure 5.5: Power Wiring: 3-phase 3-wire via direct connect. Meters must be installed according to the indicated current direction.
5.2.3. CT Operated Wiring

Figure 5.6: Power Wiring: 3-phase 4-wire CT operated. AC Voltage Input via direct connect & Current Input via -/5A CTs.

Figure 5.7: Power Wiring: 3-phase 3-wire CT operated. AC Voltage Input via direct connect & Current Input via -/5A CTs.
5.2.4. Cablaggio di comunicazione RS485
For remote communication and data acquisition, connect the RS485 interface as shown:

Figure 5.8: RS485 Wired Communication (Direct Connect Type) with IoT Gateway. Recommended cable: RVSP 2x1.5mm².

Figure 5.9: RS485 Wired Communication (CT Operated Type) with IoT Gateway. Recommended cable: RVSP 2x1.5mm².
6. Istruzioni per l'uso
6.1. Visualizza la navigazione
The ADL400 meter allows users to view various electrical parameters by navigating through the display using the front panel buttons. The video below demonstrates this process.
Video 6.1: ADL400 Product Demonstration and Display Navigation. This video shows the physical product and how to cycle through measurement parameters using the buttons.
6.2. Programmazione dei parametri
To configure the meter's settings, follow the programming sequence outlined in the diagram below. This includes setting parameters such as PT/CT ratio, wiring methods, and communication settings.

Figure 6.1: Operation Diagram for Parameter Programming
Fasi generali di programmazione:
- Long press the Enter button to enter the programming page.
- Use the Up and Down keys to enter the password.
- Enter the edit page.
- Navigate through parameters (e.g., Addr, bAUd, PAr, H, Lo, Ct, Pt, dir, PL, LED, CodE, CLrE) using the Up/Down keys.
- Set parameters by using the Up/Down keys to change values.
- After setting all parameters, press the Enter key to save.
7. Risoluzione Dei Problemi
This section addresses common issues you might encounter with your ADL400 meter.
7.1. Inaccurate Power or Energy Count
Problema: After the meter is powered on, the power or energy count is inaccurate.
Soluzione:
- Switch the meter display to show power (active power P, power factor λ).
- Check whether the power display is negative or not.
- Verify if the power factor is between 0.9-0.95.
- Check whether the incoming and outgoing wires of the current signal wire are connected reversely. The incoming wire must be the same as the incoming wire end of the instrument and consistent with the wiring diagram on the instrument.
7.2. Communication Failure with Host Computer
Problema: The instrument cannot communicate with the host computer normally after power on.
Soluzione:
- Controlla il volumetage value between the communication output A and B of the measuring instrument. It should be between +4.4-4.5V.
- Check whether the communication wiring method is correctly wired in accordance with the wiring diagram requirements (i.e., the communication terminal A/B of the corresponding to communication serial port A/B).
8. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire l'esterno del misuratore. Non utilizzare detergenti abrasivi o solventi.
- Connessioni: Controllare periodicamente tutti i collegamenti elettrici per accertarsi che siano saldi e privi di corrosione.
- Ambiente: Per prolungare la durata del misuratore, assicurarsi che l'ambiente operativo rimanga entro gli intervalli di temperatura e umidità specificati.
9. Suggerimenti per l'utente
The ADL400 is a robust energy meter designed for precise measurement. Here are some tips based on common inquiries:
- Energy Monitoring for EV Chargers/Solar Panels: The ADL400 is a 3-phase energy meter primarily designed for measuring AC power consumption. While it can monitor the energy usage of systems that include solar panels or EV chargers, it does not directly control or manage the charging process for electric vehicles from photovoltaic systems. Its main function is accurate measurement and data collection within the electrical infrastructure.
- Registrazione dei dati: Utilize the RS485 Modbus-RTU communication to connect the meter to a data logger or an IoT gateway for continuous monitoring and historical data analysis.
- Multi-Tariff Functionality: If your model supports multi-tariff, configure the time zones and tariff rates (Spike, Peak, Flat, Valley) to accurately track energy consumption costs based on different periods.
10. Garanzia e supporto
The Acrel ADL400 meter comes with a Garanzia di 2 anno from the date of purchase. For technical support, service, or warranty claims, please contact your vendor or the manufacturer directly. Ensure you have your product model and purchase details available.
11. Certificazioni
The ADL400 meter is certified to meet various international standards, ensuring quality and compliance:
- CE: Conforme ai requisiti di sicurezza, salute e tutela ambientale dell'Unione Europea.
- CE-MID: Complies with the Measuring Instruments Directive (MID) for legal metrology in Europe.
- CAE: Conforms to the technical regulations of the Eurasian Customs Union.
- IEC62053-21: Static meters for active energy (Class 1 and 2).
- IEC62053-22: Static meters for active energy (Class 0,2 S and 0,5 S).

Figura 11.1: Esample CE Certificate
12. Applicazioni
The ADL400 energy meter is suitable for a wide range of applications requiring precise three-phase energy measurement and management:

Figure 12.1: Diverse Application Areas
It can be integrated into an IoT Energy Management System (EMS) for advanced monitoring and control:

Figure 12.2: IoT EMS Platform Integration. This diagram illustrates how the ADL400 can be part of a comprehensive energy management system, enabling remote monitoring and data analysis.
Specific application exampincludono:
- Edifici: Monitoring energy consumption in commercial and residential buildings.
- Industrial Facilities: Tracking power usage in mining, petrochemical, and manufacturing plants.
- Infrastruttura: Energy management in municipal engineering and transportation systems.
- Specialized Facilities: Use in hospitals and hotel apartments for detailed energy accounting.
- Energia rinnovabile: Monitoring energy flow in solar PV installations.
- EV Charging Stations: Measuring energy consumed by electric vehicle chargers.

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