Table of Contents
Understanding Dry Type and Oil Immersed Transformers
Dry type transformers are widely recognized for their durability and safety features, making them an ideal choice for medium voltage applications. Unlike oil immersed transformers, which rely on liquid insulation for cooling, dry type transformers utilize air as a cooling medium. This design minimizes the risk of fire hazards and environmental contamination, making them suitable for urban installations and areas with strict safety regulations.
| Type | Rated capacity （KVA） | Voltage combination（KV） | No-load losses（W） | Load losses（W） | No-load current (%) | Short-circuit impedance (%) |
| S11-630 | 630 | 33,35/6.3,6.6,10.5,11 | 830 | 7870 | 1.10 | 6.5 |
| S11-800 | 800 | 33,35/6.3,6.6,10.5,11 | 980 | 9410 | 1.00 | 6.5 |
| S11-1000 | 1000 | 33,35/6.3,6.6,10.5,11 | 1150 | 11540 | 1.00 | 6.5 |
| S11-1250 | 1250 | 33,35/6.3,6.6,10.5,11 | 1410 | 13940 | 0.90 | 6.5 |
| S11-1600 | 1600 | 33,35/6.3,6.6,10.5,11 | 1700 | 16670 | 0.80 | 6.5 |
| S11-2000 | 2000 | 33,35/6.3,6.6,10.5,11 | 2180 | 18380 | 0.70 | 6.5 |
| S11-2500 | 2500 | 33,35/6.3,6.6,10.5,11 | 2560 | 19670 | 0.60 | 6.5 |
| S11-3150 | 3150 | 33,35/6.3,6.6,10.5,11 | 3040 | 23090 | 0.56 | 7.0 |
| S11-4000 | 4000 | 33,35/6.3,6.6,10.5,11 | 3620 | 27360 | 0.56 | 7.0 |
| S11-5000 | 5000 | 33,35/6.3,6.6,10.5,11 | 4320 | 31380 | 0.48 | 7.0 |
| S11-6300 | 6300 | 33,35/6.3,6.6,10.5,11 | 5250 | 35060 | 0.48 | 7.5 |
| S11-8000 | 8000 | 33,35/6.3,6.6,10.5,11 | 7200 | 38500 | 0.42 | 7.5 |
| S11-10000 | 10000 | 33,35/6.3,6.6,10.5,11 | 8700 | 45300 | 0.42 | 7.5 |
| S11-12500 | 12500 | 33,35/6.3,6.6,10.5,11 | 10080 | 53900 | 0.40 | 8.0 |
| S11-16000 | 16000 | 33,35/6.3,6.6,10.5,11 | 12160 | 65800 | 0.40 | 8.0 |
| S11-20000 | 20000 | 33,35/6.3,6.6,10.5,11 | 14400 | 79500 | 0.40 | 8.0 |
| S11-25000 | 25000 | 33,35/6.3,6.6,10.5,11 | 17020 | 94100 | 0.32 | 8.0 |
| S11-31500 | 31500 | 33,35/6.3,6.6,10.5,11 | 20220 | 112900 | 0.32 | 8.0 |
On the other hand, oil immersed transformers provide excellent thermal performance due to their ability to dissipate heat effectively. The oil not only cools the transformer but also serves as an insulator. These transformers are often used in larger power distribution systems where efficiency and reliability are paramount. Manufacturers in China have excelled in producing both types of transformers, catering to diverse industrial needs.
Medium Voltage Transformers in the Market
Medium voltage transformers play a crucial role in electrical distribution systems, bridging the gap between high voltage transmission lines and low voltage distribution networks. They are essential for converting voltage levels to ensure that electricity can be safely and efficiently delivered to residential and commercial consumers. China has emerged as a leading manufacturer of these transformers, offering a variety of models tailored to specific requirements.
With advanced technology and innovative designs, Chinese manufacturers produce high-class medium voltage transformers that meet international quality standards. Many of these companies have decades of experience, allowing them to refine their manufacturing processes and ensure product reliability. Their commitment to quality has made them trusted suppliers for various sectors, including industrial, commercial, and renewable energy applications.
The Expertise of Veteran Manufacturers
In the competitive world of transformer manufacturing, veteran companies stand out due to their years of experience and expertise. These manufacturers not only focus on the production of dry type and oil immersed transformers but also invest in research and development to innovate and improve their product offerings. Their deep understanding of market trends and customer needs allows them to deliver transformers that are both efficient and cost-effective.
Many veteran manufacturers also produce informative videos showcasing their products and technologies, helping potential customers understand the advantages of different transformer types. These resources are invaluable for engineers and procurement specialists looking to make informed decisions. By leveraging their extensive knowledge and experience, these companies continue to set the standard for excellence in the transformer industry, ensuring that they remain at the forefront of innovation.