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The Huawei DTSU666-H-HW is a three-phase energy meter (Smart Power Sensor) designed for accurate measurement of electricity consumption and generation in AC systems. The device provides high Class 1 accuracy, features a built-in LCD display for local monitoring, and supports communication via the RS-485 (Modbus RTU) interface. It is ideal for integration into Huawei Smart PV systems—SmartLogger, FusionSolar, and other solutions for energy monitoring and power flow control.
Key Benefits of the Huawei DTSU666-H-HW Energy Meter
- Supports 3P3W/3P4W three-phase systems with voltages up to 1000 V (via external PT).
- High measurement accuracy: ±0.5% for voltage/current, ±1% for power and energy.
- Connection via RS-485 / Modbus RTU — stable data transmission to SmartLogger or the inverter.
- Convenient LCD display for parameter configuration and local data viewing.
- Low power consumption — less than 1.5 W, which improves the system’s energy efficiency.
- Compact size and easy mounting on a 35 mm DIN rail.
- Compatible with Huawei SUN2000, SmartLogger3000A, and other Huawei Solar components.
Technical Specifications
- Grid type: 3-phase (3P3W / 3P4W)
- Input voltage: 90–500 V AC (up to 1000 V with external PT)
- Current range: 0 – 80 A (up to >80 A with external CT)
- Device power supply: Mains-powered, power consumption ≤ 1.5 W
- Accuracy class: Class 1 (±1% for energy, ±0.5% for voltage/current)
- Frequency: 45–65 Hz, accuracy ±0.01 Hz
- Communication interface: RS-485 (Modbus RTU), baud rate 4800–115200 bps (default 9600)
- Display: LCD, intuitive setup using SET/ESC keys
- Dimensions: 100 × 72 × 80 mm
- Weight: < 0.5 kg (including cable)
- Mounting: 35 mm DIN rail
- Operating temperature range: -25°C … +60°C
- Humidity: 5–95% (non-condensing)
Application scenarios
- Monitoring of energy consumption or generation in three-phase systems.
- Power measurement at the grid input, in sub-networks, or when connected to Huawei inverters.
- Building “Zero Export” systems — limiting energy export to the grid.
- Integration with SmartLogger for visualizing energy flow in FusionSolar.
- Industrial facilities, commercial installations, solar power plants.
Communication and monitoring interfaces
- RS-485 (Modbus RTU): main data transmission channel to SmartLogger or directly to the inverter.
- LCD display: real-time display of voltage, current, power, frequency, and energy.
- Integration with Huawei FusionSolar: automatic device detection and data synchronization in the cloud monitoring system.
Service support in Ukraine
Total-Energo LLC — Huawei’s partner in Ukraine. Provides a full range of services for the design, supply, and configuration of energy monitoring systems:
- Development of energy monitoring schemes using DTSU666-H-HW and SmartLogger;
- Professional installation and commissioning;
- Warranty and post-warranty service;