Why Is the Oil Immersed Distribution Transformer Indispensable in Power Systems?

Oil immersed distribution transformers are devices that use transformer oil as both insulation and cooling medium. They are widely applied in urban distribution networks, industrial and mining enterprises, and residential buildings. With a mature design and stable performance, they efficiently and safely handle voltage conversion tasks in complex grid environments, ensuring the normal operation of electrical equipment.

What Are the Main Advantages of Oil Immersed Distribution Transformers?

The oil immersed design allows transformer oil to provide insulation and carry away operating heat, effectively lowering the temperature of windings and the core, and extending the equipment’s service life. At the same time, the oil’s high dielectric strength enhances the transformer's voltage withstand capability, reducing the risk of partial discharge and insulation breakdown.

Why Are Oil Immersed Distribution Transformers More Reliable?

Compared with dry type or epoxy cast transformers, oil immersed distribution transformers offer superior heat dissipation under overload and short circuit conditions, and they can withstand larger instantaneous fault currents. Their internal oil tank and bushings receive rigorous protective treatment, enabling them to operate reliably in harsh environments such as high humidity or salt spray, and ensuring long term stability.

How Should You Properly Maintain an Oil Immersed Distribution Transformer?

Regularly check the oil level and temperature, and replenish or replace transformer oil as needed to maintain insulation performance and cooling efficiency. In addition, perform routine electrical tests—such as winding resistance, turns ratio, and insulation resistance—and address any abnormalities promptly. Proper external protection to prevent moisture, dust, and animal ingress is also key to extending service life.

How Do You Select the Right Oil Immersed Distribution Transformer?

When selecting a transformer, determine the capacity rating, tap changer range, and cooling method based on power supply capacity, load characteristics, and installation environment. Pay attention to material and manufacturing quality—high grade silicon steel and precision windings improve efficiency and reduce losses. Also, choose a supplier with comprehensive after sales service and technical support to ensure timely installation, commissioning, and maintenance.

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