1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the CHINT DDSU666 Single-Phase and DTSU666 Three-Phase Smart Energy Meters. These meters are designed for accurate measurement of energy consumption and generation, featuring bi-directional measurement capabilities and MODBUS RS485 communication for integration into various energy management systems.
2. Safety Information
WARNING: Installation and maintenance should only be performed by qualified personnel. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always disconnect power before installing or servicing the meter.
- Ensure all wiring connections are secure and comply with local electrical codes.
- Do not operate the meter if it appears damaged.
- Keep the meter away from moisture and extreme temperatures.
3. Product Overview
The CHINT DDSU666 and DTSU666 series are DIN-rail mountable smart meters designed for precise energy measurement. They feature an LCD display for easy reading of various electrical parameters and support MODBUS RS485 for remote data acquisition.
Key Features:
- LCD Display for clear readings.
- Bi-Directional Measurement for both imported and exported energy.
- DIN-Rail Installation for easy mounting in electrical panels.
- High Accuracy and Low Power Consumption.
- MODBUS RS485 Communication.
Display Navigation Video:
Video 1: Demonstration of navigating the display parameters on the DDSU666 meter.
4. Specifications
The following table details the specifications for the CHINT DDSU666 and DTSU666 Smart Energy Meters. Note that some specifications may vary slightly between single-phase (DDSU666) and three-phase (DTSU666) models.
| Category | Parameter | Value |
|---|---|---|
| Measurement | Compliance | IEC62052-11 IEC62053-21 |
| Connection type | 3P4W | |
| Accuracy | Class 1.0 for active | |
| Voltage | Nominal voltage (Un) | 3×220/380V, 3×57.7/100V |
| Operating range | 0.7Un ~ 1.2Un | |
| Power consumption | ≤1W, 5VA | |
| Current | CT | 1.5(6)A |
| DC | 5(80)A | |
| Frequency | 50Hz or 60Hz | |
| LCD Display | Characters | 7 characters of 7 segment display |
| Digital size | 5.3mm × 2.8mm | |
| LED Display | Number of flashes per kWh | |
| Measured Values | Total kWh | Yes |
| Total kvarh | Yes | |
| Instantaneous kW, kvar | Yes | |
| Instantaneous Irms, Vrms, frequency, power factor | Yes | |
| Brand Name | CHNT | |
| Origin | Mainland China | |
| Communications | Interface | RS485 |
| Protocol | Modbus and DL/T | |
| Environmental | Operating range limit | -40°C to +75°C |
| Storage range limit | -40°C to +85°C | |
| Relative humidity | ≤ 95%RH | |
| Ingress protection | IP54 | |
| Physical | Dimensions | 98mm × 65mm × 72mm (DTSU666) |
| Weight | 0.4 kg (Approx.) | |
| Model Number | DDSU666/DTSU666 | |
| Battery | Battery Included | No |
| Chemicals | High-concerned chemical | None |
5. Setup and Installation
The DDSU666 and DTSU666 meters are designed for DIN-rail mounting. Ensure proper wiring according to the diagrams below for safe and accurate operation.
5.1 Compatibility Warning
IMPORTANT: These meters are NOT compatible with inverters from brands such as Solax, Sofar, Sungrow, Growatt, Huawei, Deye, Hoymiles, Goodwe, and Omnik. Please ensure your system is compatible before installation.
5.2 Wiring Diagrams
Refer to the following diagrams for correct wiring of your specific meter model. Always follow local electrical codes and safety guidelines.
DDSU666 Single-Phase 80A Wiring:
DTSU666 Three-Phase 1.5(6)A with CT Wiring:
DTSU666 Three-Phase 80A Wiring:
6. Operating Instructions
The meter features an intuitive LCD display and control buttons for easy parameter viewing and configuration.
6.1 Button Functions
- SET Button: Used to enter settings menus or confirm selections.
- ESC Button: Used to exit menus or cancel operations.
- Arrow Button (Right): Used to scroll through display parameters or navigate menu options.
6.2 Display Parameters
Press the arrow button to cycle through various measured values on the LCD display. Common parameters include:
- U: Voltage (V)
- I: Current (A)
- P: Active Power (kW)
- F: Frequency (Hz)
- FE: Power Factor
- Imp. kWh: Imported Kilowatt-hours (Energy consumed)
- Exp. kWh: Exported Kilowatt-hours (Energy generated, for bi-directional models)
- MODBUS Address: (Configurable via SET button)
- Baud Rate: (Configurable via SET button)
7. Maintenance
The CHINT Smart Energy Meters are designed for long-term, maintenance-free operation. However, periodic checks are recommended:
- Ensure the meter and its connections are free from dust and debris.
- Verify that all wiring connections remain secure.
- Inspect for any signs of physical damage or overheating.
- Clean the display with a soft, dry cloth if necessary. Do not use abrasive cleaners or solvents.
8. Troubleshooting
8.1 Common Issues & Solutions
- Meter not powering on or displaying readings:
- Check all power connections to ensure they are correctly wired and receiving voltage. Verify the circuit breaker is on.
- Incorrect readings or no energy accumulation:
- Review the wiring diagrams carefully to ensure all connections (Line, Neutral, CTs if applicable) are correct. For DTSU666 models requiring CTs, ensure CTs are installed in the correct direction and connected properly.
- MODBUS communication issues:
- Verify the RS485 wiring (A and B terminals). Check the MODBUS address and baud rate settings on the meter and ensure they match your communication system. Ensure proper termination resistors are used if required by your MODBUS network.
- Incompatibility with inverter/solar systems:
- As stated in the setup section, these meters are not compatible with certain inverter brands (Solax, Sofar, Sungrow, Growatt, Huawei, Deye, Hoymiles, Goodwe, Omnik). If you are experiencing issues with these brands, it is likely due to incompatibility.
9. User Tips
- Before purchasing, always verify the meter's compatibility with your existing solar inverter or energy management system, especially regarding MODBUS communication protocols and specific brand requirements.
- For DTSU666 models that use Current Transformers (CTs), ensure the CTs are correctly oriented and sized for your application to get accurate readings.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your original point of purchase or the CHINT Electric Global Store directly. Keep your purchase receipt as proof of purchase.
