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Types of Transformers: Dry Type vs. Oil Immersed
Transformers are essential components in electrical systems, and they come in various types, including dry type and oil immersed transformers. Dry type transformers are insulated with air and do not contain any liquids, making them safer for indoor installations. They are typically used in locations where fire safety is a concern, such as commercial buildings and industrial facilities.
| 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 are filled with insulating oil, which helps dissipate heat more effectively. This type of transformer is often used in outdoor applications and in high-capacity power distribution networks. The choice between these two types depends on the specific requirements of the application, including environmental conditions and safety regulations.
The Role of 3 Phase Transformers
Three-phase transformers are widely used in industrial and commercial settings for their efficiency and reliability. They allow for the transmission of electrical power across long distances while minimizing losses. By using three phases, these transformers can balance loads more effectively, which is essential for maintaining system stability.
In China, many enterprises specialize in manufacturing three-phase transformers, leveraging advanced technology and engineering expertise. These companies often utilize cold rolled oriented silicon steel cores to enhance performance. This material reduces energy losses during operation, making the transformers more efficient and cost-effective over time.
Innovations in Transformer Manufacturing
The transformer manufacturing industry has seen significant innovations, especially in the use of materials like cold rolled oriented silicon steel. This type of steel is specifically designed to improve magnetic properties, resulting in better efficiency and lower noise levels in transformers. Manufacturers in China are increasingly adopting these materials to meet rising demands for high-performance transformers.
Moreover, video demonstrations showcasing the manufacturing process and performance tests of transformers are becoming popular. These visual aids help potential customers understand the benefits and capabilities of different transformer types, whether they are dry type, oil immersed, or three-phase. Such resources are invaluable for enterprises looking to make informed purchasing decisions in a competitive market.
