The HXGN-12 Box Type Fixed AC Metal Closed Ring Switchgear (commonly referred to as a ring main unit) is an elite AC high-voltage complete set of electrical equipment engineered for networks with a rated voltage of 12kV and a rated frequency of 50Hz. It plays a dominant and critical role in three-phase AC ring networks, terminal distribution networks, and industrial power equipment, providing seamless acceptance and distribution of electrical energy. Due to its optimized structure, it is exceptionally well-suited for direct mounting into box-type transformer substations.

• Ring Main Unit Optimization: Explicitly engineered to manage looping and grid sectionalizing tasks in high-density industrial and urban ring distribution systems.

• Compact Substation Integration: Its small footprint and tailored entry design make it perfectly suitable for seamless installation inside compact box-type transformer substations.

• Dual Load Switch Compatibility: Built with adaptive engineering that flawlessly supports both FN12-10 and FN25-12 load switch parameters based on specific project load currents.

• Robust Assembled Protection Matrix: Incorporates heavy-duty assembled electric configurations with a maximum rated fuse current capability of 100A and up to 31.5kA short-circuit breaking current protection.

H X G N □ - 12

• H: Ring network cabinet

• X: Box type

• G: Fixed type

• N: Indoor

• □: Design number

• 12: Rated voltage kV

• Altitude Baseline: Performance optimized and rated for operational environments of 1000m and below.

• Ambient Temperature Limits: Operating envelope ranges from a minimum ambient temperature of -25°C to a maximum of +40°C.

• Relative Atmospheric Humidity: Daily average relative humidity value must not exceed 95%; monthly average relative humidity value must not exceed 90%.

• Operational Safety Boundaries: The installation zone must feature no active fire risks, explosion hazards, severe environmental filth, chemical corrosion, or violent structural vibration.

• Atmospheric Purity: The surrounding air must remain clear and free from corrosive gases, flammable vapors, thick water vapor, conductive dust particles, and other obvious forms of contamination.

• Tailored Ring Main Unit Engineering: Engineered precisely to address complex looping, grid configuration, and terminal distribution tasks inside high-load three-phase AC grids.

• Pre-fabricated Substation Fit: The space-saving, low-profile mechanical architecture is meticulously customized for seamless structural integration into indoor compact transformer substations.

• Dynamic Switch Adaptability: Features verified support for dual technical parameters (FN12-10 and FN25-12 switches), allowing clients to select tailored mechanical lifespans up to 10,000 cycles.

• Absolute High-Voltage Grid Isolation: Fully compliant with global standard requirements, combining an IP20 shell envelope with robust fuse matching to guarantee instantaneous suppression of short-circuit energy up to 31.5kA.