The CKAI-12 Series is a high-performance Ring Main Unit (RMU) utilizing dry air as the insulating medium and a micro-pressure vacuum interrupter for arc extinction. Designed for safety and sustainability, it eliminates SF6 gas while maintaining superior insulation and sealing performance.

Key Benefits

✅Eco-Friendly: SF6-free design for sustainable operation.

✅High Protection: IP65-rated stainless steel gas tank enclosure.

✅Compact & Modular: Space-saving design with easy expansion capabilities.

✅Reliable Intelligence: Engineered for high reliability and smart grid integration.

Performance Advantages

• Eco-feiendly and safe: The product uses air as the insulating medium and vacuum arc extinction technology, without the use of SF₆ gas. More than 95% of its materials are eco-friendly and recyclable, helping minimize environmental impact.
• Compact structure: With a compact, modular and maintenance-free design, the circuit breaker, load switch, disconnector, sealed tank, operating mechanism and cabinet are designed as independent modules. These modules form standardized functional units, making factory prefabrication and assembly easier and more efficient.
• Easy expansion: The product supports flexible expansion and can be equipped with either spring or permanent-magnet operating mechanisms. It adopts a lower disconnector and lower earthing switch structure, with overall dimensions of 500 mm W × 920 mm D × 2000 mm H. Side expansion and common-tank configurations make installation and future expansion more convenient.
• Safe and reliable: All primary high-voltage components are fully enclosed in a stainless steel sealed tank with an IP65 protection rating, enabling an overall maintenance-free design. The sealed tank balances internal and external air pressure through an air-filtering device, keeping the internal pressure consistent with the ambient atmospheric pressure.
• Excellent performance: Through electric field simulation, calculation and optimization, the product achieves excellent electrical performance, a uniform electric field distribution, and effectively avoids partial discharge risks and hidden hazards.
• High intelligence: Through electric field simulation, calculation and optimization, the product achieves excellent electrical performance, a uniform electric field distribution, and effectively avoids partial discharge risks and hidden hazards.

Product Photos