Prefabricated Underground Substation

Product Introduction

• The Prefabricated Underground Substation is composed of an underground transformer, advertising lightbox switchgear, and prefabricated pit, with the overall equipment divided into below-ground and above-ground sections:
• Below-ground: Prefabricated (or cast-in-place concrete) pit and underground transformer.
• Above-ground: Advertising lightbox outdoor switchgear and ventilation/cooling channels.
• This product is suitable for various urban power distribution systems, especially for cable undergrounding projects and municipal power infrastructure.
• The underground transformer can be installed inside the pit and functions as a compact integrated distribution facility, accommodating the transformer, high-voltage load switches, and protective fuses within a single oil tank.
• The substation is ideal not only for long-distance, low-load high-voltage transmission systems along roads, bridges, and tunnels, and overhead-to-underground conversion projects, but also for residential community distribution systems. It is widely used in underground distribution networks with high reliability requirements and minimal environmental impact, rated 10kV or below, providing power and lighting for urban main roads, airports, bridges, tunnels, large green spaces, and industrial parks.
• Moreover, the product can be customized to blend with surrounding environments, enhancing city landscapes.

Application Scenarios

• Widely used in urban grid renovation, city roads, residential communities, high-rise buildings, shopping centers, airports, railway stations, and other indoor and outdoor distribution scenarios.

Normal Operating Conditions

• Altitude: ≤ 1000 m
• Ambient Temperature: -25°C to +40°C
• Relative Humidity: ≤ 90% (at 25°C)
• Maximum Wind Speed: ≤ 35 m/s
• Seismic Conditions: Horizontal acceleration ≤ 0.4 m/s², Vertical acceleration ≤ 0.2 m/s²
• Installation Environment: Free from fire and explosion hazards, severe pollution, corrosive gases, and intense vibration; installation tilt ≤ 3°
• Note: Transformers can be customized to operate under special service conditions according to user requirements.

Product Advantages

• Energy Saving & Environmentally Friendly: Compared to conventional prefabricated substations, it occupies less space, is easy to install, can be located close to load centers, reduces line losses, and saves materials and energy.
• Low Maintenance & Flood Resistant: Maintenance-free design, waterproof, flood-resistant, low temperature rise, low noise, and reliable operation.
• Environmentally Harmonious: Lightbox enclosures blend with surroundings, improving aesthetics and avoiding noise and electromagnetic interference.
• High Strength & Corrosion Resistant: Oil tank made of low-alloy structural steel with excellent welding and low-temperature toughness; surface treated with hot-dip galvanizing and plastic coating for strong corrosion resistance.
• Fully Sealed Design: Exposed high- and low-voltage terminals are sealed with imported waterproof materials, ensuring safe operation even if the pit is flooded.
• Excellent Heat Dissipation: Unique fin structure ensures efficient heat dissipation and anti-rust performance.
• Multi-functional Low-voltage Cabinet: Patented outdoor lightbox design, dual-sided advertising capability, with compact energy-saving LED modules.
• Flexible Foundation Design: Underground transformer foundation is prefabricated and can be customized with different materials according to customer requirements.

Product Parameter

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