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Types of Transformers: Dry Type and Liquid Immersed
Transformers play a crucial role in electrical power distribution, converting voltage levels to ensure efficient transmission. Two primary types are dry type transformers and liquid immersed transformers. Dry type transformers use air as a cooling medium, making them ideal for indoor applications and in environments where fire safety is a concern. They are commonly used in commercial buildings and light industrial settings.
Liquid immersed transformers, on the other hand, utilize a dielectric liquid, typically mineral oil, for cooling and insulation purposes. This design allows for larger voltage capacities and higher overall efficiency, which is particularly advantageous in heavy industrial applications or utility substations. These transformers are often found in outdoor installations due to their robust housing and ability to dissipate heat effectively.
Understanding 3-Phase Transformers
Three-phase transformers are essential in three-phase power systems, which are widely used in industrial and commercial applications. These transformers can be constructed using either dry or liquid immersion methods. They consist of three primary windings that correspond to each phase, enabling balanced load distribution and increased efficiency in power delivery.
| Type | Rated capacity （KVA） | Voltage combination（KV） | No-load losses（W） | Load losses（W） | No-load current （%） | Short-circuit impedance （%） |
| SC10-800 | 800 | 33,35,38/6,6.3,6.6,10,11 | 2200 | 9400 | 1.1 | 6.0 |
| SC10-1000 | 1000 | Voltage combination（KV） | 2610 | 10800 | 1.1 | 6.0 |
| SC10-1250 | 1250 | 6,6.3,6.6,10,11/0.4 | 3060 | 11900 | 1.0 | 6.0 |
| SC10-1500 | 1500 | Voltage combination（KV） | 3600 | 15400 | 1.0 | 6.0 |
| SC10-2000 | 2000 | 6,6.3,6.6,10,11/0.4 | 4130 | 18200 | 0.9 | 7.0 |
| SC10-2500 | 2500 | Voltage combination（KV） | 4750 | 21800 | 0.9 | 7.0 |
| SC10-3150 | 3150 | 6,6.3,6.6,10,11/0.4 | 5880 | 24500 | 0.8 | 8.0 |
| SC10-4000 | 4000 | Voltage combination（KV） | 6860 | 29400 | 0.8 | 8.0 |
| SC10-5000 | 5000 | 6,6.3,6.6,10,11/0.4 | 8180 | 34960 | 0.7 | 8.0 |
| SC10-6300 | 6300 | Voltage combination（KV） | 9680 | 40800 | 0.7 | 8.0 |
| SC10-8000 | 8000 | 6,6.3,6.6,10,11/0.4 | 11000 | 46060 | 0.6 | 9.0 |
| SC10-10000 | 10000 | Voltage combination（KV） | 12660 | 56500 | 0.6 | 9.0 |
| SC10-12500 | 12500 | 6,6.3,6.6,10,11/0.4 | 15400 | 64600 | 0.5 | 9.0 |
| SC10-16000 | 16000 | Voltage combination（KV） | 18900 | 76000 | 0.5 | 9.0 |
| SC10-20000 | 20000 | 6,6.3,6.6,10,11/0.4 | 22400 | 85500 | 0.4 | 10.0 |
One distinct advantage of 3-phase transformers is their ability to provide a compact design while delivering significant power output. They can be configured in various ways, including delta or wye connections, allowing flexibility based on specific application needs. Many manufacturers in China focus on producing high-quality 3-phase transformers to meet both domestic and international demands.
High Impedance Transformers
High impedance transformers are designed to limit fault currents and reduce the likelihood of damage during short circuits. By using a higher impedance, these transformers provide a level of protection for sensitive equipment connected to the electrical system. They are particularly beneficial in locations where large inrush currents might otherwise pose risks.
Many industries in China are focusing on the production of high impedance transformers due to their increasing relevance in modern electrical systems. As energy efficiency and safety become ever more critical, these transformers serve a valuable purpose in helping minimize potential failures. Engaging with visual media, such as demonstration videos, further assists engineers and technicians in understanding the advantages and operational methodologies of these advanced transformer designs.
