1155/5000 The ingenious design enables the reliable operation of the power grid, and the three-phase fully-sealed oil-immersed power transformer uses cutting-edge technology to build a secure defense line for power distribution.

Recently, our company's Three-Phase Hermetically Sealed Oil-Immersed Distribution Transformer has completed batch production and type testing. With its core advantages such as fully enclosed protective structure, ultra-low energy consumption, maintenance-free operation, and strong environmental adaptability, it provides high-stability core equipment for power transmission in various scenarios such as urban and rural power grids, industrial plants, new energy stations, municipal infrastructure, mining and chemical industries, etc., deeply aligning with the national dual-carbon strategy and the development requirements of intelligent and green distribution network transformation.

As the "energy hub" of the power transmission and distribution system, traditional oil-immersed transformers generally have oil reservoirs and breathing devices. During operation, the insulation oil is prone to contact with air, oxidation, and moisture absorption, requiring regular oil filtration, oil replacement, and testing. This not only incurs high operation and maintenance costs but also poses risks such as oil leakage, insulation aging, and frequent faults. The three-phase fully-sealed oil-immersed power transformer has completely revolutionized the underlying structure, eliminating the oil reservoir (oil pillow) and breathing devices. The box body adopts an overall full-welding sealed process, and the wave-shaped oil tank wall's elastic expansion compensates for the oil volume fluctuations caused by temperature changes, completely isolating the transformer oil circuit from the outside atmosphere, thereby eliminating the intrusion of moisture, dust, and corrosive gases at the root and significantly delaying the aging speed of the insulation oil and internal windings.

1. Core Technology Breakthrough, Leading Industry Performance

1. Fully sealed maintenance-free design, significantly reducing life cycle costs

The overall sealed welding structure blocks oxygen and water vapor from entering the oil tank, reducing the aging rate of insulation oil by more than 70%. After the equipment is put into use, there is no need for regular oil drainage, analysis, oil replacement, or oil filtration, truly achieving long-term maintenance-free operation; the integrated welding process significantly reduces the risk of oil leakage, avoiding oil pollution of the site, fire hazards, etc., and the equipment design service life can reach 25-30 years, significantly reducing long-term operation costs.

2. Efficient energy-saving iron core structure, practicing green and low-carbon development

The product uses three-phase symmetrical high-magnetic-conductivity cold-rolled silicon steel sheet wound iron core, with a balanced magnetic path and minimal magnetic resistance loss. The no-load loss and load loss are far superior to the national energy efficiency limit values, reducing the comprehensive loss by more than 15% compared to traditional S11 series transformers, with lower no-load current and lower operating noise. Under full-load conditions, the temperature rise is precisely controlled, and the long-term energy-saving benefits are prominent, meeting the standards for first-level energy efficiency products, helping enterprises reduce electricity consumption and complete energy-saving and consumption reduction assessment.

3. Strong adaptability to various working conditions, stable and reliable in complex environments

The equipment has full anti-corrosion, dust-proof, moisture-proof, and salt spray resistance performance, capable of coping with harsh scenarios such as high-humidity and salt spray areas along the coast, dust environments in mines, corrosive gases in chemical parks, and outdoor rainy and dusty conditions. The internal windings use high-strength insulation materials and vacuum oil injection technology, with an overall rigid fixation of the equipment body, excellent short-circuit impact resistance, and strong overload carrying capacity. It performs stably in industrial production lines with fluctuating loads, photovoltaic and wind power booster stations, and old transformer area grid renovation projects.

4. Compact modular structure, convenient and efficient installation and deployment

The wave-shaped heat dissipation oil tank integrates the cooling function, making the overall shape compact and regular, with a smaller占地面积. It supports core lifting for maintenance， can be directly installed on the ground， hung on poles， or pre-installed in box-type substations， suitable for 10kV/0.4kV mainstream power distribution systems， covering a capacity range of 30kVA-2500kVA， with high standardization and short delivery and on-site commissioning cycles.