As the global energy structure transitions toward clean, low-carbon development and digital technologies penetrate every layer of the industry, Remote Terminal Units （RTUs） - the core devices of power automation systems - are facing a series of formidable challenges. Complex and dynamic grid topologies, varying national technical standards, and increasingly prominent cyber-security risks all demand higher performance. Whether ensuring the stable operation of transmission and distribution automation or driving substations toward intelligent transformation, the reliability, intelligence, and multi-scenario adaptability of RTUs have become critical factors influencing the overall efficiency of the grid.
Since successfully developing China's first generation RTU in 1982, Dongfang Electronics has accumulated over 40 years of technical expertise - from the FDK1331 series to today's industry-leading DF1725IED series - continually advancing innovation and product iteration. At present, the new generation of RTUs has successfully passed rigorous tests conducted by internationally recognized laboratories such as KEMA and KETOP, and obtained relevant certifications. Leveraging its outstanding quality, Dongfang Electronics has so far deployed over 60,000 units across more than 20 countries and regions, including Malaysia, Saudi Arabia, India, Indonesia, Thailand, Singapore, Nepal, and Hong Kong, China. In key overseas markets, the company has established a distinct competitive edge through customized solutions and superior product performance:
• Malaysia Market: Since its entry in 2004, Dongfang Electronics' RTU products have rapidly gained market recognition. With stable performance and localized services, the company has maintained the leading market share of up to 60%, becoming a key partner in the country's power grid development.
• India Market: In India's two major national distribution projects - the Restructured Accelerated Power Development and Reforms Programme （R-APDRP） and the Integrated Power Development Scheme （IPDS） - Dongfang Electronics' RTU （Remote Terminal Unit） and FRTU （Feeder Remote Terminal Unit） products have demonstrated outstanding performance, each holding over 30% market share and maintaining the top position in the industry.
• Saudi Arabia Market: To adapt to harsh local conditions such as extreme heat and sandstorms, Dongfang Electronics' RTU products have enhanced environmental resilience, improved compatibility with various complex sensors, and optimized support for diverse signal inputs and control logic. These innovations have fully met the requirements of local grid construction, achieving over 40,000 units deployed within three years and capturing more than 40% market share - establishing the company as a major force in regional grid modernization.
Driven by technological innovation and grounded in reliable quality, Dongfang Electronics continues to support power grid upgrades and transformations across countries along the Belt and Road, contributing to the global transition toward green energy.
I. Adhering to Standards:
Laying a Solid Foundation for Global Market Access
Dongfang Electronics' RTUs have always been designed and manufactured in strict accordance with IEC international standards, featuring compatibility with over 100 communication protocols to enable seamless connectivity and data exchange with a wide range of intelligent power devices. The products have also obtained multiple specialized certifications in the power industry and cyber-security, ensuring long-term stable operation even under extreme temperature and humidity conditions. In addition, each unit is equipped with high-performance industrial-grade chips that provide strong anti-interference and self-diagnostic capabilities, ensuring the accurate transmission of data and control commands.
II. Deepening Technological Excellence:
Full-Scope Applications, Adapted to Complex Environments
Dongfang Electronics has developed a comprehensive product portfolio covering RTUs, FRTUs, and BCUs, widely applicable to transmission station monitoring, distribution network management, ring main unit control, and pole-mounted switch operation and maintenance. By optimizing hardware architecture and adopting modular components, the products maintain stable performance under harsh conditions such as high temperature, humidity, and dust. This effectively reduces labor and equipment maintenance costs, enhances the intelligence level of transmission and distribution systems, and meets the diverse technical requirements of power grid construction across different countries and regions.
Technical Solutions | Key Features | Applicable Scenarios |
RTU Application Solution | Centralized design where all data are processed by the core RTU before unified reporting; supports IEC 61850 protocol with high scalability. | Suitable for transmission and distribution substation monitoring. |
FRTU Application Solution | Supports monitoring of ring main units and pole-mounted switches; integrates fault detection and event recording functions; features high-precision A/D conversion for accurate measurements. | Applicable to monitoring of distribution network ring main units, pole-mounted switches, and box-type substations. |
BCU Application Solution | Based on IEC 61850 layered design with strong scalability; supports LCD configuration for full SAS substation functionality; includes PLC capability for flexible editing of operation interlock logic. | Suitable for high-voltage substation automation systems （SAS）。 |
III. Product Family:
Comprehensive Coverage and Continuous Innovation
Dongfang Electronics has developed a diverse family of remote terminal products tailored to various power system applications. Each product maintains the brand's hallmark reliability while being optimized for specific scenarios.
Products | Images |
Comprehensive Monitoring DF1725IED Strictly compliant with IEC international standards, it integrates advanced power monitoring technologies featuring high real-time performance, reliability, interoperability, and openness. Designed with multiple functional plug-ins, it supports both AC and DC power types and enables comprehensive signal acquisition. In addition to the "four remote" functions （remote measurement, signaling, control, and regulation）， it provides breaker synchronization or voltage-check interlock, anti-misoperation lockout, and network communication functions. It also supports programmable logic control （PLC）， enabling operation lockout within individual electrical units as well as interlock schemes between different units. |
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Compact Intelligent Remote Terminal Unit DF1725IED-T0 Inheriting the flexible, reliable, and stable design of the DF1725IED series, this compact model offers higher cost-effectiveness and is primarily used for monitoring pole-mounted switches and similar applications. |
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Pole-Mounted Distribution Controller DF1725IED-R An intelligent terminal product developed for overseas distribution network applications, it serves as the core control module for primary feeder terminal unit （FTU） switching devices. Working with reclosers and sectionalizers, it enables automated solutions such as reclosing and fault isolation. |
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Self-Powered Overcurrent Protection Device E0320S Designed for incoming and outgoing feeders of 35kV and below, this integrated protection, measurement, control, and communication device adopts a dual power supply mode - "operating current self-supply + auxiliary power" - to ensure continuous operation under extreme conditions. |
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Current and Voltage Protection Device E0320J A digital current protection relay capable of accurately measuring phase current, zero-sequence current, interphase voltage, and zero-sequence voltage. It can function as the primary protection for overhead lines, cables, and transformers in high-voltage radial distribution systems, or serve as backup protection. |
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From developing China's first domestically produced RTU in 1982 to today's intelligent product matrix serving countries along the Belt and Road, Dongfang Electronics has upheld the philosophy of "global standards, local adaptation", empowering overseas users with innovative technologies and quality services for smarter, more sustainable power grids. Looking ahead, Dongfang Electronics will continue to advance the integration of digital technology with power systems, connecting the global energy network with reliable Chinese solutions and collaborating with partners worldwide to build an intelligent, efficient, and reliable energy future!
