Normal Pressure Sealed Air-Insulated Switchgear-12kV

The XGN series is a versatile 12kV medium-voltage power distribution system designed to adapt to diverse operational needs. Utilizing a normal-pressure sealed structure with air as the insulating medium, this system completely eliminates reliance on SF6 gas, making it an environmentally friendly solution for modern grids. Its modular design allows for flexible cabinet combinations, integrating power distribution, protection, and control functions. It is ideal for industrial zones, urban grids, and renewable energy facilities where adaptability to varying load demands and spatial constraints is critical.

Key Features

• Flexible Cabinet Combinations (Modular Design): Offers a comprehensive range of modular cabinet types—including incoming, outgoing, and transformer metering units—that can be freely combined based on project requirements. This modularity allows for tailored configurations to match specific power distribution layouts and functional needs, such as dual-loop supply or integrated metering.

• Normal Pressure Air Insulation (SF6-Free): Operating at atmospheric pressure with dry air as the insulating medium, the XGN eliminates the risks of gas leakage and environmental pollution. It removes the need for regular gas refilling or complex pressure monitoring associated with SF6-based systems, significantly reducing long-term operational costs and carbon footprint.

• Hermetically Sealed & Durable Enclosure: The core high-voltage components are housed in a hermetically sealed stainless steel box (IP65 rating). This structure protects internal parts from moisture, dust, and corrosive gases, ensuring stable performance in harsh environments such as high-humidity tropical zones, industrial dust areas, or coastal regions.

• High Safety & Reliability (IEC Compliant): Equipped with a comprehensive 5-prevent mechanical interlock system and anti-maloperation mechanisms. The design includes visible isolation points to ensure operator safety during maintenance. The fully enclosed structure minimizes arc flash risks, strictly adhering to IEC 62271 safety standards.

• Space-Efficient & Compact Layout: The modular cabinets feature a compact footprint, enabling efficient use of installation space. Whether for indoor secondary substations, underground chambers, or sites with severe spatial constraints, the flexible layout maximizes power density per square meter.

• Easy Expansion & Future-Proofing: The modular architecture allows for straightforward on-site expansion or reconfiguration. As grid demands evolve, additional cabinets can be seamlessly integrated without extensive system overhauls, minimizing downtime and protecting the user’s long-term infrastructure investment.

Main Parameters

Normal Service Conditions

• Ambient Air Temperature:

• Maximum Temperature: +40°C

• 24-hour Average: ≤35°C

• Minimum Temperature: -25°C(Class minus 25 indoor). Note: Customized designs for extreme cold (-40°C) are available for specific project requirements.

• Altitude:

• Standard Rating: ≤1000m (per IEC 62271-1).

• High Altitude Application: The XGN is designed to operate at altitudes up to 2500m. For installations above 1000m, the external insulation level is adjusted according to the altitude correction factor Ka to maintain dielectric integrity.

• Humidity Conditions:

• Daily Average Relative Humidity: ≤ 95%

• Monthly Average Relative Humidity:≤ 90%

• Water Vapor Pressure: Daily average ≤ 2.2 kPa; Monthly average ≤ 1.8 kPa.

• Environmental Integrity:

• The ambient air must not be significantly polluted by dust, smoke, corrosive or flammable gases, vapors, or salt spray.

• Vibrations or earth tremors should be negligible within the installation site.