The 12kV modular dual isolation dry air insulated ring main unit adopts a main circuit arrangement with dual isolating switches on the busbar side and line side, combined with an independent fast grounding switch, featuring a novel structure and a wide range of main wiring scheme applications. This product is primarily used in three-phase AC 50Hz, rated voltage 12kV secondary distribution systems. It is particularly suitable for compact secondary substations, switching stations, industrial and mining enterprises, urban residential communities, airports, railways, tunnels, high-rise buildings, and other power systems for receiving and distributing electric energy.

Main Technical Features:

Adopts integrated upper and lower direct-acting isolating switches with encapsulated pole units, combining the advantages of both upper and lower isolation schemes, offering broad scheme adaptability.

Circular conductor with uniform electric field; isolating contacts use spring contact fingers and high-precision positioning design to ensure long-term reliable contact.

Gas tank protection rating of IP67, fully shielded busbar expansion, verified for use at altitudes up to 5000m.

Uses pure dry air insulation and vacuum arc extinction, aligning with the "carbon peak and carbon neutrality" goals.

Based on simulation optimization, high insulation margin, with overall partial discharge ≤ 10pC.

Employs laser welding and helium leak detection to achieve an extremely low gas leakage rate.

Dual isolation break visualization enhances operational safety.

Maintenance-free, convenient for operation and maintenance, requiring no gas monitoring or recovery operations.