Intelligent Ring Main Unit
Engineered for smart grid, renewable energy, and intelligent distribution applications, the Smart RMU combines automated switching, real-time monitoring, remote communication, and advanced fault detection technologies. By enabling automated network management and unattended operation, it enhances distribution reliability, improves operational efficiency, and accelerates the digitalization of modern power distribution systems.
HXGN15-12 AC Metal-Enclosed Ring Main Unit
The HXGN15-12 is an AC high-voltage complete switchgear with a rated voltage of 12kV and a rated frequency of 50Hz. It is mainly used in three-phase AC ring networks, terminal distribution systems, and industrial electrical installations for power receiving, distribution, and protection. It is also suitable for installation in compact (prefabricated) substations.
This product complies with GB3906 “3–35kV AC Metal-Enclosed Switchgear”, GB/T11022 “Common Technical Requirements for High-Voltage Switchgear and Controlgear Standards”, IEC60298 “AC Metal-Enclosed Switchgear and Controlgear for Rated Voltages Above 1kV up to 52kV”, and IEC60694 “Common Specifications for High-Voltage Switchgear and Controlgear”. It is equipped with a complete “five-interlock” protection system.
Advantages & Features
Dual Local and Remote Operation Modes
Equipped with a motorized spring-charged operating mechanism, the system supports both local manual operation and remote electrical switching from a control center. Designed to meet distribution automation requirements, it enables remote feeder switching, load transfer, and network reconfiguration without the need for on-site personnel intervention.Standardized Automation Expansion Design
An independent enclosed low-voltage control compartment is provided with reserved installation space and terminal connections for standard DTU (Distribution Terminal Unit) and FTU (Feeder Terminal Unit) devices. Distribution automation terminals can be integrated without modifying the cabinet structure, ensuring compatibility with mainstream smart grid and distribution automation upgrade projects.Comprehensive Online Condition Monitoring
The system can be expanded with wireless cable termination temperature monitoring, voltage presence indicators, fault passage indicators, and voltage/current acquisition modules. These functions enable real-time monitoring of equipment temperature rise and feeder operating conditions. Faults can be automatically detected, accurately located, locally alarmed, and reported to the control center, significantly reducing troubleshooting and service restoration time.Seamless Integration Through Multiple Communication Protocols
Supports industry-standard power communication protocols, including IEC 60870-5-104 (IEC 104) and Modbus, enabling seamless integration with utility distribution management systems, industrial park energy management platforms, and photovoltaic plus energy storage monitoring systems. This facilitates data interoperability, remote operation and maintenance, and intelligent power distribution scheduling.
Technical Parameters
| Item | Unit | Load Switch | Combination Unit |
Rated Voltage | kV | 12 | 12 |
Rated Frequency | Hz | 50 | 50 |
Power Frequency Withstand Voltage (phase-to-phase, phase-to-earth / across open contacts) | kV | 42 / 48 | 42 / 48 |
Lightning Impulse Withstand Voltage | kV | 75 / 85 | 75 / 85 |
Rated Current | A | 630 | 125 |
Rated Short-Circuit Making Current (peak) | kA | 50 | — |
Rated Peak Withstand Current | kA | 50 | — |
Rated Short-Time Withstand Current | kA / s | 20 / 4 | — |
Rated Short-Circuit Breaking Current | kA | — | 31.5 |
Rated Transfer Current | kA | — | 31.5 |
Max. Fuse Current | A | — | 125 |
Circuit Resistance | μΩ | ≤300 | ≤300 (excluding fuse) |
Auxiliary & Control Circuit Insulation Test | V | 2000 | 2000 |
