Fully Shielded Design High Voltage Switchgear Solid Insulated Ring Main Unit RMU 12kV

The GTXGN-12 Solid Insulated Ring Main Unit (RMU) represents the next generation of medium-voltage distribution technology. Engineered to replace traditional SF6 gas-insulated switchgear, the GTXGN-12 utilizes solid insulation technology, where all live parts are encapsulated in epoxy resin or specialized insulating materials.

This design completely eliminates the use of Sulfur Hexafluoride (SF6) gas, a potent greenhouse gas, making it the premier choice for environmentally conscious infrastructure projects. With its fully shielded, fully sealed, and maintenance-free architecture, the GTXGN-12 provides unmatched reliability in harsh environments, including high-altitude, humid, or coastal regions. Its modular "plug-and-play" design allows for flexible expansion and easy integration into smart grid networks.

• 100% SF6-Free Technology: Uses solid dielectric materials for insulation and vacuum interrupters for arc quenching. This eliminates the risk of gas leakage and the need for gas pressure monitoring, significantly reducing environmental impact.

• Fully Shielded & Sealed Design: All high-voltage components are encapsulated in epoxy resin. The surface is coated with a conductive layer for grounding, ensuring the cabinet is safe to touch and immune to external pollutants like dust, moisture, and salt spray.

• Compact & Space-Saving: The solid insulation architecture allows for reduced phase-to-phase distances. The GTXGN-12 occupies up to 40% less space than traditional air-insulated switchgear, making it ideal for compact secondary substations.

• Smart Grid Compatibility: Integrated with advanced electronic sensors and microcomputer-based protection relays. Supports remote monitoring, automated fault isolation, and real-time data transmission via standard communication protocols.

• All-Weather Resilience: Because there is no gas to expand or contract, the unit performs consistently across extreme temperature ranges (-45°C to +45°C) and is unaffected by low atmospheric pressure at high altitudes.

1. Urban Power Grids: Ideal for underground substations and compact urban distribution centers where space is limited and safety is critical.

2. Renewable Energy Hubs: Main collection switchgear for wind farms and solar PV plants, offering high reliability in remote, harsh locations.

3. Industrial & Mining: Rugged protection for high-voltage motors and transformers in dusty or chemically corrosive environments.

4. Smart City Infrastructure: Serving as the backbone for intelligent ring network automation in smart districts.

• Maintenance-Free Lifecycle: The vacuum interrupter and solid insulation eliminate the need for gas testing or refilling. The system is designed for a 30-year service life with minimal intervention.

• High Operator Safety: Features a visible isolation gap and a comprehensive mechanical "Five-Prevention" interlock system to prevent operational errors.

• Modular Expansion: Cabinets can be combined in any sequence (Load Break Switch, Vacuum Circuit Breaker, or Metering units) to meet specific site requirements.

• Advanced Surface Treatment: The external steel enclosure is treated with anti-corrosive powder coating, while internal HV modules are IP67 rated against water immersion.

Q: What is the main advantage of Solid Insulation over SF6 Gas Insulation?

A: Solid insulation is more eco-friendly (zero greenhouse gas), requires no gas pressure monitoring, and is safer in the event of an arc fault as there are no toxic gas byproducts released.

Q: Is the GTXGN-12 suitable for high-altitude areas?

A: Yes. Unlike air-insulated gear, which loses dielectric strength as air thins, the solid insulation in the GTXGN-12 remains constant, making it the standard choice for altitudes above 2000 meters.

Q: Can these units be integrated into existing SCADA systems?

A: Absolutely. We provide optional DTU (Distribution Terminal Units) that support Modbus-RTU, IEC 60870-5-101/104, and DNP3 protocols for seamless remote control.

GTXGN □ -12 series solid insulated ring network cabinet is a fully insulated, fully sealed, maintenance-free solid insulated vacuum switchgear. The high voltage live part is cast with epoxy resin material with excellent insulation performance, and the vacuum arc extinguishing chamber, leading electric circuit and insulation support are organically combined as a whole. The functional units are connected through fully insulated solid busbar. Therefore, the whole switch device is not affected by external environment, which ensures the reliability of the device and the safety of the operator.
The ring network cabinet has the characteristics of simple structure, flexible operation, reliable interlocking, convenient installation and so on. It is suitable for 50Hz, 12kV power system, widely used in industrial and civil cable ring network and distribution network terminal projects, as the acceptance and distribution of electric energy. Especially suitable for urban residential areas of power distribution, small substation, open and close, cable branch box, box substation, industrial and mining enterprises, shopping malls, airports, subway, wind power generation, stadium, railway, tunnel and other places to use.
Because the product has the advantages of full insulation, full sealing, full shielding, so it is especially suitable for high altitude, high temperature, humid heat, cold, serious pollution and other harsh environment areas.