Huawei DHSU1079-CT three-phase power sensor DIN module energy measurement RS485 Modbus CT 250A 50mA
- Huawei DHSU1079-CT three-phase smart power sensor for real-time measurement of energy, power, voltage and current; current range 0-250 A (CT 250 A/50 mA).
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Huawei DHSU1079-CT - 250 A/50 mA Smart Power Sensor
Huawei DHSU1079-CT is a three-phase Smart Power Sensor with built-in 250 A/50 mA current transformers, designed for real-time measurement of energy, power, voltage and current. The device is mounted on a 35mm DIN rail and works with Huawei FusionSolar systems, inverters and EV charging systems, providing high accuracy Class 1 measurement.
- Three-phase measurement of 0-250 A (CT 250 A/50 mA)
- Class 1 measurement accuracy (±1%)
- RS485 communication (Modbus-RTU)
- Support for 3P3W and 3P4W circuits
- Compact housing for DIN35 rail mounting
Product description
The DHSU1079-CT allows compLeks to measure and analyze electrical network parameters for PV, ESS and EV installations. The built-in RS485 interface provides direct integration with Huawei Digital Power devices. With a built-in LCD screen, the device presents key data: active energy, total power, phase voltages, currents and power factors (PF). The device can operate in three-phase 3-wire or 4-wire systems.
Safety and reliability
Each phase (Ua, Ub, Uc) is protected by a built-in fuse and thermistor, protecting against short-circuit effects. The sensor is CE, RCM and UKCA certified, and its operation is stable at temperatures from -25°C to +60°C. With a high-resistance housing and short-circuit protection, the DHSU1079-CT provides reliability in industrial and commercial environments.
Technical data
| General data | |
|---|---|
| Model | DHSU1079-CT (250 A/50 mA) |
| Mounting type | DIN35 rail |
| Dimensions (W × H × D) | 72 × 99.3 × 66 mm |
| Weight | ≈ 0.5 kg |
| Certifications | CE, RCM, UKCA |
| Electrical data | |
| Rated voltage | 230/400 V AC, 50/60 Hz |
| Current range | 0 - 250 A (CT 250 A/50 mA) |
| Operating voltage range | 0.7 - 1.3 Un |
| Measurement accuracy | Class 1 (±1%) |
| Grounding system | 3P3W or 3P4W |
| Power consumption | ≤ 2 W |
| Communication | |
| Interface | RS485 |
| Protocol | Modbus-RTU |
| Transmission speed | 1200-115200 bps (default 9600 bps) |
| Environmental parameters | |
| Operating temperature | -25°C ~ +60°C |
| Relative humidity | 5% - 95% (non-condensing) |
| Operating altitude range | 0 - 4000 m |
| Protections and functions | |
| Protection of voltage inputs | Built-in fuses and thermistors (Ua, Ub, Uc) |
| Communication signaling | 📞 icon on LCD display |
| Display mode | Automatic cycle every 5 s or manual with buttons |
Technical data source: Huawei Digital Power - Quick Guide DHSU1079-CT 250 A/50 mA (Issue 01, 2024-01-30)Link
FAQ
- What parameters does the DHSU1079-CT measure? Voltage, current, active power, energy, frequency and power factors.
- What are the voltage and current ratings? 230/400 V AC and 250 A (CT 250 A/50 mA).
- What kind of accuracy does it have? Class 1 - ±1% error in energy measurement.
- Can it be used in a 3P3W system? Yes, it supports 3P3W and 3P4W.
- What kind of communication interfaces does it have? RS485 with Modbus-RTU protocol.
- What are the dimensions and mounting method? 72 × 99.3 × 66 mm, DIN35 rail mounting.
- What are the certifications? CE, RCM, UKCA.
- What are the operating conditions? -25°C to +60°C, 5-95% RH.
- How to set the address and baud rate? Using SET and → buttons, with password 701 (factory settings).
- Do CTs have a mounting direction? Yes, according to the arrow marking on the transformer housing.
Summary
The Huawei DHSU1079-CT is a compact and precise industrial-grade power sensor ideal for PV, ESS and charging station applications. It offers Class 1 accuracy, Modbus-RTU communication and full compatibility with the Huawei Digital Power ecosystem, providing a reliable tool for power monitoring and balancing.