Product Overview
A prefabricated substation is a compact distribution device that integrates high-voltage switchgear, transformers, and low-voltage distribution equipment into a single unit according to a specified wiring configuration. The substation base is constructed from channel steel and angle steel, while the enclosure is assembled from aluminum alloy panels, stainless steel panels, and aluzinc-coated steel sheets, with an electrostatic powder-coating finish. It exhibits exceptional resistance to intense solar exposure, radiation, aging, as well as excellent flame retardancy and thermal insulation properties.

Technical Specifications
[Voltage Level]
Low-voltage side: 0.4 kV (three-phase five-wire system)
High-voltage side: 10 kV (rated voltage 12 kV) / 35 kV (rated voltage 40.5 kV)
Insulation level: 10 kV power-frequency withstand voltage of 42 kV for 1 minute, and lightning impulse voltage of 75 kV.
[Capacity Range]
Dry-type transformers: 30 kVA to 2,500 kVA (SCB13 series; no-load losses are 15% lower than the national standard).
Oil-immersed transformers: 50 kVA to 1600 kVA (S13 model efficiency up to 99.5%)
[Protective Performance]
Enclosure: 304 stainless steel or aluminum-zinc coated steel sheet (thickness ≥ 2 mm); Protection rating: IP54 (enclosure) / IP3X (high-voltage compartment); Short-circuit withstand capability: 25 kA for 2 seconds on the high-voltage side, and 50 kA for 1 second on the low-voltage side.
[Core Design Standards]
National Standards System
GB/T 17467-2020 “Prefabricated High-Voltage/Low-Voltage Substations” and GB 3906-2020 “AC Metal-Enclosed Switchgear with Voltage Ratings from 3.6 kV to 40.5 kV” shall comply with the fire-resistance requirements specified in GB/T 2408, with a flame-retardant rating of V-0.
[Structural Design]
High-voltage room: SF6-insulated or vacuum circuit breaker (mechanical life ≥ 5,000 operations)
Transformer Room: Natural ventilation is designed at 3 m²/min per 1 kW of loss.
Low-voltage room: drawer-type or fixed-type switchgear (rated current ≤ 4000 A)
Its core components include:
[Structural Composition]
High-voltage room: equipped with load switches or circuit breakers; commonly used for 10 kV/35 kV voltage-level transformer rooms: dry-type or oil-immersed transformers (typically with a capacity ≤ 1600 kVA). Low-voltage room: includes incoming and outgoing circuit breakers, metering devices, and reactive power compensation equipment. Enclosure structure: constructed with double-layer steel plates sandwiching fire-resistant insulation material, achieving an ingress protection rating of IP54.

[Technical Features]

Modular Design: Factory prefabrication rate exceeds 90%, reducing on-site installation time by 70%. Intelligent Monitoring: Optional smart modules for temperature monitoring, remote communication, and more. Energy Efficiency and Environmental Protection: New-generation products feature lower no-load losses compared with conventional substations, reducing energy consumption by 15–20%. Protection Performance: Wind resistance rating of ≥ Grade 10, with seismic resistance up to Intensity 8.
[Typical Applications]

Urban distribution networks: terminal power supply and temporary power usage for residential communities and commercial centers; temporary substations for construction sites, municipal projects, and other temporary power needs; new-energy integration: step-up and grid-connection nodes for photovoltaic power plants and wind farms.

Special Scenarios: Power Supply Nodes in Harsh Environments such as Mines and Oil Fields
Note: New prefabricated substations have progressively achieved 5G-based remote monitoring and integration of digital twin technology, resulting in a more than 40% improvement in operation and maintenance efficiency.