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Oil lmmersed Distribution Transformer

For reliable and efficient medium-voltage power distribution, the Oil Immersed Distribution Transformer remains the industry standard. Its robust design, featuring a core and coil assembly submerged in insulating mineral oil, ensures effective cooling, insulation, and long-term operational stability. These transformers are engineered to step down primary distribution voltages to levels suitable for commercial, industrial, and residential end-use. Key advantages include superior overload capacity, excellent heat dissipation, and proven durability in diverse environmental conditions. If you are specifically looking for high-efficiency models that meet modern energy standards, explore our advanced S13 Distribution Transformer series. For a dedicated range utilizing the classic oil-immersed technology with enhanced performance, our S13 Oil Immersed Transformer lineup offers optimal solutions for reducing energy losses and total cost of ownership.


The design philosophy behind every Oil Immersed Distribution Transformer prioritizes safety, efficiency, and minimal maintenance. The insulating oil not only quenches potential arcs but also prevents moisture absorption and oxidation of the internal components, significantly extending service life. The sealed tank construction protects the active parts from dust, corrosive gases, and other atmospheric contaminants. Oil Immersed Distribution Transformers are typically available in standard and custom configurations to meet specific project requirements, including varying kVA ratings, voltage classes, and vector groups. Their proven reliability makes them a cornerstone for utility companies, large industrial plants, and infrastructure projects worldwide, where continuous power supply is critical.

Key Product Parameters & Specifications

Our Oil Immersed Distribution Transformers are manufactured to international standards (IEC, ANSI, etc.) and come with a comprehensive set of features:

Rated Capacity (kVA) High Voltage (kV) Low Voltage (kV) No-load Loss (W) Load Loss (W) Impedance (%)
50 11, 22 0.415 130 870 4.0
100 11, 33 0.415 220 1500 4.0
200 11, 33 0.415 350 2400 4.0
315 11, 33 0.415 480 3400 4.0
500 11, 33 0.415 650 4950 4.0
800 11, 33 0.415, 11 1050 7500 6.0
1000 11, 33 0.415, 11 1250 10300 6.0

Note: Specifications are indicative and can be customized. Loss values conform to efficiency standards such as DOE 2016, CESC, etc. All technical data is subject to design optimization and manufacturing tolerances.

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