Electric meter HUAWEI Smart Power Sensor – DDSU1079-CT (1phase) 100A/40mA, external CT included CTF16-2K5-100, cable RS485

Huawei DDSU1079-CTissmart single-phase electricity meter (Smart Power Sensor), intended foraccurate electricity metering in PV systems and hybrid installations.
It is compatible withinverters Huawei SUN2000 seriesandLUNA2000 energy systems, providingreal-time measurement of voltage, current, active and reactive power, as well astwo-way energy flow (import/export).

The device usesexternal current transformer (CT 100 A / 40 mA), which allowssafer and easier installation, without the need to interrupt the power supply.

Functions and features

• Measures:Voltage (U), current (I), active power (P), frequency (F), power factor (PF), active energy (import/export).

• RS485 communication– for integration with Huawei inverters and Smart Logger.

• LCD display– displays the current system parameters in real time.

• Automatic reading cycle– refresh every 5 seconds (Auto Loop).

• Compatible with Zero Export, Smart Load and Energy Monitoring functions in Huawei FusionSolar.

• Built-in calibration and intelligent current transformer recognition.

Installation and connection

Installation:

1. It is mounted on a DIN 35 mm rail

2. Push the sensor down until it clicks into the rail.

Connection:

• Connect power linesL and Nto terminals 3 and 4.

• ConnectCT baselinesto terminals 5 and 6.

• ConnectRS485A and RS485Bto the communication port of the inverter.

Recommended cables:

• AC cable: copper, 1.5–4 mm², Ø 8–12 mm

• Communication RS485 cable: twisted pair 0.5 mm², Ø 6–8 mm

Settings and parameters

• Communication address and baud rate setting:via a button on the front panel (press for 3 s).

• Default baud rate: 9600 bps.

• Parity: None, 1 stop bit.

• Auto Loop Refresh:5 s cycle.

• Supported parameters:Imported/exported energy, current, power, voltage, frequency

Warranty and certification

• Warranty:2 years

• Certificates: CE, RoHS, EMC, IEC61010, IEC62053

Key benefits

• Precise measurement of consumption and generated energy

• Safe installation with an external current transformer (CT)

• RS485 communication for integration with Huawei systems

• Automatic data refresh and easy configuration

• Compact design for DIN rail (only 36 mm wide)

• Support for Zero Export and Smart Energy Management

✅ Type:Single-phase smart power meter (Smart Power Sensor)
✅ Input voltage: 230 V AC
✅ CT input: 100 A / 40 mA
✅ Communication: RS485 (Modbus RTU)
✅ Installation:DIN 35 mm rail
✅ Dimensions: 36 × 92.3 × 53 mm
✅ Warranty:2 years

We inform you that, despite our efforts, we cannot guarantee that the published information and photos do not contain inaccuracies or errors that cannot be a legal basis for claims.

Technical characteristics

✅ Type:Single-phase Smart Power Sensor (electric meter)
✅ Rated voltage: 230 V
✅ Operating Current Transformer (CT): 40 mA
✅ Compatible Current Transformer (CT): 100 A / 40 mA
✅ Sensor input voltage: 230 V AC
✅ Installation:DIN 35 mm rail (standard mounting rail)
✅ Dimensions (WxHxD): 36 × 92.3 × 53 mm
✅ Communication: RS485 Modbus RTU
✅ Ports:L / N - power supply 230 V; CT – current transformer input; RS485A / RS485B – communication with inverter / Smart Logger
✅ Body Material:ABS, non-flammable, industrial grade
✅ Operating temperature:-25°C to +60°C
✅ Relative humidity:≤95 % (no condensation)
✅ Working height:up to 2000 m
✅ Degree of protection: IP20
✅ Indication:LCD display with energy, current, voltage, power and frequency readings
✅ Mounting position:Vertical
✅ Weight: ~0.2 kg
✅ Warranty:2 years

Additional information