1. Introduction
The Acrel ACR10R KWh 3 Phase Energy Meter is designed for bidirectional energy monitoring, particularly suitable for solar power applications. It accurately measures active and reactive power, current, voltage, frequency, and power factor in three-phase systems. This meter supports communication via RS485 (MODBUS-RTU) and can be paired with external split-core current transformers (CTs) or Rogowski coils for flexible installation. Its compact design allows for 35mm DIN rail mounting, making it ideal for energy-saving renovation projects and power monitoring in distributed photovoltaic grid-connected systems.
2. Product Features
- Measurement Capabilities: Measures 3-phase active power, reactive power, current, voltage, frequency, and power factor.
- Current Rating Options: Supports various current ratings up to 300A with external split-core CTs (10mm/80A, 16mm/120A, 24mm/200A, 36mm/300A) or up to 20000A with Rogowski coils.
- Communication: RS485 interface with MODBUS-RTU protocol for data exchange.
- Application: Ideal for distributed solar PV systems and anti-reflux inverter applications.
- Display: Clear LCD for parameter display and programming.
- Installation: Designed for easy 35mm DIN rail mounting.
- Power Supply: Wide range AC (85~265V) or DC (100~350V) power supply.
- Certification: CE certified.
- Optional Function: Harmonic Monitoring.
- Bidirectional Metering: Supports both active and reactive energy metering.
- Keypad HMI: Integrated keypads for parameter display setting and communication configuration.
3. Specifications
| Category | Parameter | Details |
|---|---|---|
| General | Model Number | ACR10R-D36TE4 |
| Dimensions | 85*64*54mm | |
| Measurement | Net Work | 3-phase 3-wire, 3-phase 4-wire |
| Frequency | 45~65Hz | |
| Rated Voltage | AC 57.7V/100V (100V), 220V/380V (400V) | |
| Max Operating Current | 150A & Above (up to 300A with CTs, 20000A with Rogowski Coil) | |
| Measuring Energy Range | 0-99999.9kwh | |
| Measurement Parameters | U, I, P, Q, S, PF, F (Voltage, Current, Active Power, Reactive Power, Apparent Power, Power Factor, Frequency) | |
| Accuracy | Accuracy Class | 1 |
| Frequency Accuracy | 0.05Hz | |
| Power | Power Supply | AC 85~265V or DC 100~350V; DC 24V(±10%); DC 48V(±10%) |
| Consumption | ≤10VA | |
| Battery Included | Yes | |
| Communication | Interface | RS485 |
| Protocol | MODBUS-RTU | |
| Display | Type | LCD |
| Display Mode | Field LCD | |
| Environment | Operating Temperature | -10℃~55℃ |
| Storage Temperature | -20℃~70℃ | |
| Relative Humidity | 5%~95% (No condensation) | |
| Safety | Power-frequency withstand voltage | AC2kV/1min (Auxiliary power, switch volume output, current input, voltage input, communication, pulse output, switch volume input) |
| Insulation Resistance | >100MΩ (Input, Output terminal to housing) |
4. Package Contents
The standard package for the ACR10R Energy Meter includes:
- 1 x Acrel ACR10R 3 Phase Energy Meter
- 3 x External Split-Core Current Transformers (CTs) - Specific current rating depends on the selected model (e.g., 80A, 120A, 200A, 300A)
- User Manual (this document)
5. Setup & Installation
5.1. DIN Rail 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 the meter to fix it securely on the DIN rail.
- Ensure the meter is successfully installed and stable.
5.2. Current Transformer (CT) Installation
The ACR10R meter can be paired with either split-core CTs or Rogowski coils. Ensure correct polarity and secure connection for accurate measurements.
- Split Core CT Installation: Open the CT, place the conductor through the center, and close it securely. Ensure the direction of current flow matches the CT's arrow for correct measurement.
- Rogowski Coil Installation: Wrap the Rogowski coil around the conductor.
Video 1: Demonstration of energy meter and Rogowski coils.
6. Wiring Diagrams
Proper wiring is critical for the safe and accurate operation of the ACR10R energy meter. Refer to the following diagrams for common configurations.
6.1. General System Connection
6.2. Detailed Wiring for 3-Phase Systems
6.3. Bidirectional Metering Diagram
6.4. Distributed Solar PV Application Diagram
7. Operating Instructions
The ACR10R meter features an LCD display and keypad HMI for user interaction.
7.1. LCD Display
The LCD provides real-time readings of various electrical parameters such as voltage, current, power, frequency, and energy consumption. It also serves as the interface for programming and configuration.
7.2. Keypad HMI
Use the integrated keypads (FN, Set, and arrow buttons) to navigate through menus, view different parameters, and configure settings such as communication parameters (address, baud rate) and wiring modes (3P3W, 3P4W).
8. Maintenance
- Cleaning: Keep the meter clean and free from dust. Use a soft, dry cloth for cleaning. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the operating environment adheres to the specified temperature and humidity ranges to prevent damage.
- Connection Checks: Periodically inspect all wiring connections to ensure they are secure and free from corrosion.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to ensure optimal performance and access to new features.
9. Troubleshooting
- No Display/Power: Check the power supply connections (AC 85~265V or DC 100~350V) and ensure they are within the specified range. Verify that the power source is active.
- Incorrect Readings: Double-check all CT and voltage wiring connections for correct polarity and phase sequence. Ensure the CTs are correctly installed around the conductors. Verify the meter's configuration settings match your system.
- Communication Issues (RS485): Confirm the RS485 wiring is correct (A to A, B to B). Check the communication parameters (baud rate, address) on the meter and the connected device (e.g., inverter, gateway). Ensure termination resistors are correctly used if necessary.
- Meter Not Responding: If the meter becomes unresponsive, try power cycling it (turn off, wait a few seconds, then turn on). If the issue persists, consult the warranty and support section.
10. User Tips
- Data Logging: For applications requiring detailed historical data, such as measurement profiles every 15 minutes, ensure the optional data logging feature is enabled and configured. Refer to the programming interface for setup.
- CT Selection: Always choose CTs with a current rating appropriate for your application to ensure accuracy and prevent damage.
- Anti-Reflux Function: When using the meter with an inverter for anti-reflux, ensure the RS485 communication is correctly established and configured according to both the meter and inverter manuals.
11. Warranty & Support
The Acrel ACR10R 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 the ACREL Official Store or your authorized dealer. Provide your product model number (ACR10R-D36TE4) and a detailed description of the issue when seeking support.
