Distribution Terminal Unit
The DTU-30D Distribution Terminal Unit (DTU) is a high-performance, modular automation device designed for outdoor and indoor distribution stations, ring main units, and switch cabinets. It serves as the core intelligent control unit in distribution automation systems, responsible for real-time data acquisition, remote monitoring, fault detection, and control of distribution network equipment.
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Comprehensive Data Acquisition & Remote Control
Supports multi-channel analog and digital signal collection, including voltage, current, switch status, and fault indicators.
Enables remote opening/closing control of switches and circuit breakers, supporting automatic fault isolation and power restoration.
Compatible with standard communication protocols (IEC 60870-5-104, Modbus, etc.) for seamless integration with SCADA systems.
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High Reliability & Environmental Adaptability
Rugged industrial-grade design with wide operating temperature range (-40°C to +70°C) and strong resistance to humidity, dust, and electromagnetic interference.
Built-in watchdog and fault self-diagnosis functions ensure stable operation even under harsh field conditions.
Supports AC/DC dual power supply with automatic switching, preventing data loss during power outages.
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User-Friendly Operation & Maintenance
Intuitive front panel with LED indicators, control buttons, and a display screen for local status monitoring and manual operation.
Modular hardware design simplifies installation, expansion, and on-site maintenance.
Supports local parameter configuration and remote firmware upgrade, reducing on-site service costs.
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Flexible Configuration & Scalability
Configurable I/O ports to adapt to different station types (ring main units, cable branch boxes, distribution substations).
Supports multiple communication modes (Ethernet, GPRS/4G, optical fiber) to meet diverse networking requirements.
Can be customized for different distribution automation solutions, including feeder automation and distribution network monitoring.
| Parameter | Specification |
|---|---|
| Model | DTU-30D |
| Power Supply | AC 220V / DC 24V / 48V |
| Operating Temperature | -40°C ~ +70°C |
| Relative Humidity | 5% ~ 95% (non-condensing) |
| Communication Protocols | IEC 60870-5-104, Modbus-RTU/TCP, DNP3, etc. |
| Analog Input Channels | Up to 32 channels |
| Digital Input Channels | Up to 64 channels |
| Control Output Channels | Up to 32 channels |
| Protection Class | IP40 (indoor) / IP65 (outdoor enclosure optional) |
| Communication Interfaces | Ethernet, RS485, RS232, 4G/GPRS |
- Distribution automation systems in urban and rural power grids
- Ring main units and outdoor cable branch boxes
- Prefabricated compact substations
- Industrial park and commercial building distribution networks
- Feeder automation and fault location systems
The DTU-30D terminal unit is manufactured in accordance with IEC 60870, IEC 61850, and relevant industry standards. Each unit undergoes rigorous testing for performance, reliability, and electromagnetic compatibility (EMC), ensuring stable and secure operation in distribution automation projects.
