1. Technical characteristics of combined transformer
Integrated compact structure with a single box for high voltage, transformer, and low voltage integration, occupying only one-third of the floor area of European transformers, making transportation and lifting convenient;
Fully sealed oil immersed maintenance free: The corrugated or sheet radiator oil tank has a fully sealed structure, which isolates air and moisture, and the insulation oil is not easily aged, greatly reducing oil change, oil filtration and maintenance work;
Built in two in one protection component: high-voltage side integrated load switch+short-circuit protection fuse+backup current limiting fuse integrated into the transformer oil tank, achieving dual protection against overload and short circuit, eliminating the need for an independent high-voltage switchgear;
Efficient heat dissipation structure: The transformer oil tank is exposed, allowing for natural convection heat dissipation without the need for additional fans;
Flexible expansion of wiring: The low-voltage compartment can integrate outgoing circuits, metering, and reactive power compensation modules to expand distribution functions;
Outdoor anti-corrosion protection: The overall steel plate anti-corrosion coating is rainproof and dustproof, and can be directly installed on the ground without the need for a supporting civil engineering room;
Operation safety interlock: The high-voltage operating mechanism is equipped with mechanical five prevention interlock to prevent dangerous operations such as live opening and false opening and closing;
Lightweight and easy to construct: The whole machine is integrally formed, and a single unit is lifted into place. Only cable docking is required on site, greatly reducing the construction period.
2. Product features
2.1 Design standards: GB, IEC
2.2 Capacity (MVA): 0.2 to 4
2.3 Voltage (KV): 10-35
2.4 Cooling method: ONAN
2.5 Installation locations: outdoor green belts, both sides of roads, open spaces in the factory area, photovoltaic/wind farm stations, temporary power distribution points on construction sites, and outdoor concrete foundations in rural areas.
2.6 Application scenarios: Distribution of power in rural residential areas, distributed photovoltaic power stations, wind power stations, municipal road lighting, end of pipe power distribution in industrial parks, temporary power supply for construction sites, small distribution points in scenic spots and logistics parks.
2.7 Insulation level: Class A
2.8 Operating environment:
Environmental temperature: maximum+40 ℃, minimum -35 ℃;
Altitude: ≤ 1000m, customized reinforced insulation models are available for altitudes exceeding 1000m;
Atmospheric conditions: Outdoor rain and sun protection, no strong corrosive, high concentration conductive dust, 25 ℃ relative humidity ≤ 95%;
Installation requirements: Smooth the concrete base, ensure proper drainage, and avoid long-term waterlogging at the bottom of the box.
2.9 Types
Wiring by function: terminal type combination transformer, ring network type combination transformer;
According to low-voltage configuration: basic output type, metering type, integrated type with reactive power compensation;·According to applicable scenarios: conventional distribution type, photovoltaic boost dedicated type, temporary power supply type on construction sites;
According to protection level: IP54, IP44 outdoor anti-corrosion protection level.
