OEM oil-immersed double-winding transformers in the 100 kVA, 200 kVA, and 315 kVA range are widely used in power distribution systems where reliable voltage conversion, high efficiency, and long service life are required. These transformers are designed for medium- and low-voltage applications in industrial plants, commercial buildings, residential distribution networks, infrastructure projects, and utility substations. Their oil-immersed construction provides excellent cooling performance, strong insulation capability, and stable operation under continuous load conditions.A double-winding transformer consists of a primary winding and a secondary winding, electrically isolated from each other while sharing a magnetic core. This design enables efficient energy transfer between different voltage levels with minimal losses. The 100 kVA model is typically suitable for smaller distribution loads, such as local facilities, workshops, and auxiliary systems. The 200 kVA unit serves medium-capacity applications, including commercial complexes, small factories, and municipal distribution networks. The 315 kVA transformer is ideal for larger loads, supporting industrial equipment, multi-building systems, and substations requiring dependable power delivery. Together, these ratings provide flexible options for a wide range of installation environments.The oil-immersed design uses high-quality insulating oil to cool the windings and core during operation. Heat generated by electrical losses is transferred to the oil and then dissipated through the tank surface or cooling accessories, helping maintain safe operating temperatures. This improves overload capability and extends transformer lifespan. The oil also enhances dielectric strength, reducing the risk of insulation breakdown and improving operational reliability. Depending on the application, these transformers may be designed with natural oil cooling, sealed tank structures, or other configurations optimized for maintenance-free or low-maintenance operation.OEM customization is an important advantage for these transformers. Dimensions, voltage ratios, tap settings, impedance values, insulation class, noise level, and mounting arrangements can be adapted to meet specific project requirements. Optional features may include temperature monitoring devices, pressure relief mechanisms, oil level indicators, corrosion-resistant coatings, and enhanced protection against environmental conditions. Such flexibility allows the transformer to integrate smoothly into different power systems and comply with relevant technical standards.These transformers are valued for their robust mechanical strength, low no-load and load losses, and dependable performance in demanding operating environments. With proper design and manufacturing, they offer stable voltage regulation, high short-circuit withstand capability, and long-term service under varying load conditions. Their compact structure and practical maintenance requirements also make them suitable for both indoor and outdoor installations.In summary, OEM 100 kVA, 200 kVA, and 315 kVA oil-immersed double-winding transformers provide efficient, durable, and customizable solutions for modern power distribution. Their combination of strong cooling performance, reliable insulation, and adaptable design makes them an excellent choice for diverse electrical applications.