Table of Contents
Types of Transformers: Dry Type and Liquid Immersed
Transformers play a crucial role in electrical systems, and they are generally classified into two main types: dry type and liquid immersed transformers. Dry type transformers utilize air as a cooling medium, making them ideal for indoor installations where space is limited. They are often used in commercial buildings and industrial applications, providing a compact and safe solution for voltage regulation.
Liquid immersed transformers, on the other hand, are cooled by insulating oil. This type is typically used in outdoor settings and can handle higher power loads. The oil not only cools the transformer but also provides insulation between the energized parts and the environment. This makes liquid immersed transformers more suitable for substations and larger electrical networks.
https://www.youtube.com/watch?v=xdq6fujW5wE
Pole Mounted Transformers and Their Applications
Pole mounted transformers are a common sight in urban and rural areas. These transformers are installed on utility poles, allowing for easy access and maintenance. They typically use either dry type or liquid immersed designs, depending on the specific needs of the location and the load requirements. Their placement helps in efficient voltage distribution across various regions.
In addition to providing reliable power, pole mounted transformers also help in reducing transmission losses. By bringing the transformer closer to the end-users, the system minimizes the distance electricity must travel, enhancing overall efficiency. This is particularly important in remote areas where extending the power grid can be costly and impractical.
| 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 |
The Role of Chinese Enterprises and ISO Certifications
China has become a leading manufacturer of transformers, with numerous enterprises specializing in this field. These companies often adhere to international standards to ensure quality and reliability. Certifications such as ISO 9001 and ISO 14001 indicate a commitment to quality management and environmental responsibility, respectively. This helps Chinese enterprises maintain a competitive edge in the global market.
Many of these companies also invest in advanced technology and research to improve their products. Video demonstrations showcasing their transformers in action can provide valuable insights for potential clients. These visuals not only highlight the functionality of their products but also demonstrate the innovative approaches taken by these specialists in the transformer industry.
