1. Introduction
The Acrel ADL400 three-phase electric meter is designed for precise energy measurement in low voltage systems. This meter complies with the technical requirements of electronic meters as specified in the IEC62053-21 and IEC62053-22 standards. It offers comprehensive monitoring of electrical parameters, making it suitable for various applications requiring accurate power consumption data.
2. Features
- Measurement: 3-phase AC kWh, kVarh, U, I, P, Q, S, PF, F, and harmonics (2~31st and total harmonic).
- Accuracy: 0.5% (kWh).
- Frequency: 45~65Hz.
- Rated Voltage: 3x380~456Vac L-L (direct connect); 3x100~120Vac L-L (via PTs).
- Rated Current: 3x10(80)A AC (direct connect); 3x1(6)A AC (via CTs).
- Communication: RS485 (MODBUS-RTU).
- Display: 12-bit section LCD with backlight.
- HMI: Keypads for programming.
- Data Function: Data frozen, Max Demand.
- Optional Multi-tariff: 4 Time zones, 2 time interval lists, 14 time intervals per day, and 4 tariff rates (Spike, Peak, Flat, Valley).
- Certifications: IEC, CE, CE-MID, EAC.
3. Specifications
| Category | Parameter | Value |
|---|---|---|
| General | Specification | 3 phase 3 wires, 3 phase 4 wires |
| Voltage Measurement | Reference Voltage | 3×100V/3×380Vac, 3×57.7/100Vac, 3×220/380Vac (Can normally work under 1.2 times of rated voltage) |
| Consumption | <10VA (Single phase) | |
| Impedance | >2MΩ | |
| Accuracy Class | Error ±0.2% | |
| Current Measurement | Input Current | 3×1(6)A, 3×10(80)A |
| Consumption | <1VA Single phase rated current | |
| Accuracy Class | Error ±0.2% | |
| Power Measurement | Active, Reactive, Apparent Power | Error ±0.5% |
| Frequency | Range | 45~65Hz, Error ±0.2% |
| Metering | Energy | Active energy (Accuracy class: 0.5), Reactive energy (Accuracy class 2) |
| Clock | ≤0.5s/d | |
| Digital Signal | Energy Pulse Output | 1 active photocoupler output |
| Pulse | Width of Pulse | 80±20ms |
| Pulse Constant | 400imp/kWh, 10000imp/kWh (Corresponds with the basic current) | |
| Communication | Interface and Protocol | RS485: Modbus RTU |
| Baud Rate | 1200bps~19200bps | |
| Environment | Working Temperature | -25℃~+55℃ |
| Relative Humidity | ≤95% (No condensation) | |
| Dimensions | Overall Dimensions | 72*90*65mm |
| Battery Included | Yes |
4. Setup (Installation)
The ADL400 meter is designed for 35mm DIN rail installation. Ensure all power is disconnected before proceeding with installation.
4.1 Mechanical Installation
- Push off the buckle on the back side of the meter.
- Install the meter onto a 35mm DIN rail by aligning the slot behind the meter with the rail.
- Buckle up to fix the meter securely on the DIN rail.
- Ensure the meter is successfully installed and stable.
4.2 Electrical Wiring
Refer to the following diagrams for correct wiring based on your system type (Direct Connect or CT Operated).
4.2.1 Direct Connect Type
This section applies to meters with direct current input (e.g., Max 80A Input).
4.2.2 CT Operated Type
This section applies to meters with current transformer (CT) input (e.g., Max 6A Input).
5. Operating Instructions
The ADL400 meter features an LCD display and three buttons for navigation and programming.
5.1 Button Functions
| Button Icon | Function | Description |
|---|---|---|
 |
Voltage and current, up | Check the voltage and current. Move leftward and change flash in programming menu. |
|
Power, down | Check the power. Move rightward and change the value on flash. |
|
Energy, enter | Check the energy. Enter/exit programming menu. Save changes. |
5.2 Programming and Configuration
To enter the programming page, long press the 'Enter' button. Use the 'Up' and 'Down' keys to enter the password. Once in the edit page, you can set various parameters.
Key configurable parameters include:
- PT or CT ratio
- Wiring methods (3P4W or 3P3W)
- Real-time clock adjustment
- RS485 (MODBUS-RTU) communication settings (address, baud rate)
After setting all parameters, press the 'Enter' key to save the changes.
5.3 Multi-Tariff Functionality
The ADL400 supports advanced multi-tariff functions, allowing for flexible energy billing based on time of use:
- Time Zones: Up to 4 distinct time zones.
- Tariff Rates: Supports 4 tariff rates: Spike, Peak, Flat, and Valley.
- Time Periods: Configurable with 2 time interval lists and up to 14 time intervals per day.
- Data Frozen: Stores frozen data for the last 48 months or last 90 days.
- Max Demand: Records maximum demand and its occurrence time.
6. Maintenance
The Acrel ADL400 meter is designed for reliable operation with minimal maintenance. However, regular checks can ensure optimal performance and longevity.
- Cleaning: Keep the meter clean and free from dust and debris. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature (-25℃~+55℃) and humidity (≤95% RH, non-condensing) ranges.
- Connection Integrity: Periodically inspect all wiring connections to ensure they are secure and free from corrosion. Loose connections can lead to inaccurate readings or operational issues.
- Firmware Updates: Check the manufacturer's website for any available firmware updates that may improve performance or add new features.
7. Troubleshooting
This section addresses common issues you might encounter with your ADL400 meter.
7.1 Common Problems and Solutions
-
Q: After the meter is powered on, the power or energy count is inaccurate.
A: Switch the meter display to the power (active power P, power factor λ) interface, and check whether the power display is negative or not. Also, verify if the power factor is between 0.9-0.95. Then, 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.
-
Q: The instrument cannot communicate with the host computer normally after power on.
A: 1. The voltage value between the communication output A and B of the measuring instrument should be between +(4.4-4.5)V. 2. Check whether the communication wiring method is correctly wired in accordance with the wiring diagram requirements (that is, the communication terminal A/B of the corresponding to communication serial port A/B).
8. User Tips
- Phase Configuration: The meter supports both 3-phase 3-wire and 3-phase 4-wire configurations. Ensure your wiring matches the meter's settings for accurate readings.
- CT Direction: When using Current Transformers (CTs), pay close attention to the current direction indicated by arrows on the CTs and ensure they are installed correctly relative to the meter's input terminals. Incorrect CT orientation is a common cause of inaccurate power readings.
- RS485 Communication: For reliable RS485 communication, use a shielded twisted-pair cable (e.g., RVSP 2x1.5mm²) and ensure proper termination if necessary, especially over longer distances or in noisy environments.
- Password Protection: Utilize the programming password feature to prevent unauthorized changes to the meter's configuration.
9. Warranty and Support
The Acrel ADL400 MID 3 Phase Energy Meter comes with a 2-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical support, troubleshooting assistance, or warranty claims, please contact Acrel Official Store customer service. Ensure you have your product model number and purchase details ready.
10. Applications
The ADL400 meter is versatile and can be applied in various settings for energy monitoring and management:
- Industrial: Mining, Petrochemical, Factories.
- Commercial: Buildings, Hotel Apartments, Hospitals.
- Infrastructure: Municipal Engineering, Transportation.
- Specialized: EV Chargers, Solar PV installations, Electrical Safety monitoring.
11. Certifications
The Acrel ADL400 meter holds the following important certifications, ensuring its quality and compliance with international standards:
- CE
- CE-MID
- EAC
- IEC62053-21
- IEC62053-22
