A three-phase oil-immersed transformer is a medium-to-high voltage power transformer that utilizes insulating oil as both a cooling and insulating medium, specifically designed for three-phase AC power systems. Its core and windings are immersed in insulating oil, which enables efficient heat dissipation and electrical isolation through oil circulation. This type of transformer is widely used in power transmission and distribution networks, industrial power systems, and renewable energy applications.
Three-phase oil-immersed transformers are extensively utilized in power grids for voltage step-up/down operations in transmission and distribution networks, as well as in industrial plants including steel mills, chemical factories, and heavy machinery operations. They play a vital role in renewable energy systems by integrating with solar/wind farms and hydropower stations, while also ensuring stable power supply for commercial buildings such as shopping malls, hospitals, and high-rise structures. These transformers are critical infrastructure components for airports, railways, and metro systems requiring uninterrupted power, and demonstrate rugged performance in demanding environments like mining and oil/gas operations with corrosive or explosive atmospheres. Additionally, their robust design makes them particularly suitable for rural electrification projects in remote areas characterized by fluctuating demand and harsh weather conditions.
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