1. Technical characteristics of prefabricated transformers
Three compartment independent partition structure: high voltage room, transformer room, and low voltage room are isolated from each other, with fireproof partitions, and faults do not spread to each other, with a high level of safety protection;
Factory prefabrication integration: All internal wiring, protection settings, and voltage withstand tests of the entire machine are completed in the factory, reducing the on-site construction period by 80%;
Outdoor all-weather protection: The overall metal shell is rainproof, dustproof, sunscreen, and rust proof, suitable for long-term outdoor operation;
Optimization of heat dissipation and ventilation: The transformer and low-voltage distribution room are equipped with upper and lower convection ventilation louvers, with optional forced exhaust to ensure the heat dissipation of the transformer and low-voltage distribution equipment;
Fully integrated functions: can be equipped with high-voltage ring main unit, measuring instruments, reactive power compensation capacitor cabinet, intelligent monitoring, and DC operation power supply;
Operation and maintenance safety: The high-voltage room is equipped with load switches, fuses/circuit breakers, and has five prevention interlocks to prevent misoperation; Low voltage side is equipped with plastic shell circuit breakers, leakage, overload, and short circuit protection;
Intelligent monitoring optional: equipped with temperature and humidity monitoring, transformer temperature control, remote signaling and telemetry, connected to the distribution IoT platform;
Small footprint: only 1/5 of traditional civil power distribution rooms, suitable for urban areas, roads, and photovoltaic stations with tight land use.
2. Product features
2.1 Design standards: GB, IEC
2.2 Capacity (MVA): 0.4 to 3.5
2.3 Voltage (KV): 0.1-35
2.4 Cooling method: AN/AF
2.5 Installation location: outdoor road side, park open space, photovoltaic/wind farm station, outdoor factory area, municipal green belt, temporary power distribution point on construction site, outdoor concrete foundation installation.
2.6 Application Scenarios: Urban residential area power distribution, commercial parks, industrial parks, highway service areas, photovoltaic ground power stations, wind power boosting substations, municipal road lighting, temporary power supply for construction sites, outdoor power distribution for scenic spots, logistics industry parks.
2.7 Insulation level:
Built in oil immersed transformer: winding with A-level oil paper insulation;
Built in dry-type transformer: epoxy resin cast F-class insulation;
2.8 Operating environment
Environmental temperature: -35 ℃ to+40 ℃;
Altitude: ≤ 1000m, customized models with reinforced insulation and increased heat dissipation can be used in high-altitude areas;
Atmospheric conditions: Rainproof and sun proof outdoors, no strong corrosiveness, high concentration conductive dust, relative humidity ≤ 95%;
Basic requirements: Level the concrete base, ensure proper drainage, and avoid soaking the box with accumulated water.
2.9 Types
According to the structural type: European style box transformer (European transformer, three compartment split isolation), American style box transformer (American transformer, compact shared box);
According to the built-in transformer: oil immersed prefabricated substation, dry-type prefabricated substation, amorphous alloy prefabricated substation;
According to the high-voltage wiring method: ring network type, terminal type;
According to functional configuration: ordinary distribution type, reactive power compensation type, photovoltaic boost dedicated type, etc;
By shell material: cold-rolled steel plate spray coating shell, stainless steel anti-corrosion shell, composite plate lightweight shell;
According to protection level: IP44, IP54 outdoor protection level.
