Table of Contents
Understanding Oil Immersed Transformers
Oil immersed transformers are widely used in power distribution due to their efficiency and reliability. The oil serves as both an insulator and a coolant, allowing these transformers to operate effectively even under heavy loads. This design helps maintain optimal operating temperatures, ensuring longevity and performance.
In regions where electricity demand is growing rapidly, such as China, the demand for high-capacity transformers like the 4000 kVA transformer has surged. These transformers can handle significant power loads while maintaining stability in voltage supply, making them essential for industrial applications and large-scale power projects.

Advantages of 4000 kVA Transformers
The 4000 kVA transformer offers numerous advantages that make it a preferred choice for many manufacturers. For instance, its robust design allows for high efficiency, reducing energy losses during operation. This not only lowers operational costs but also contributes to a more sustainable energy framework.
| Type | Rated capacity (KVA) | Voltage combination(KV) | No-load losses(W) | Load losses(W) | No-load current (%) | Short-circuit impedance (%) |
| SZ11-2000 | 2000 | 33,35/6.3,6.6,10.5,11 | 2300 | 19240 | 0.80 | 6.5 |
| SZ11-2500 | 2500 | 33,35/6.3,6.6,10.5,11 | 2720 | 20640 | 0.80 | 6.5 |
| SZ11-3150 | 3150 | 33,35/6.3,6.6,10.5,11 | 3230 | 24710 | 0.72 | 7.0 |
| SZ11-4000 | 4000 | 33,35/6.3,6.6,10.5,11 | 3870 | 29160 | 0.72 | 7.0 |
| SZ11-5000 | 5000 | 33,35/6.3,6.6,10.5,11 | 4640 | 34200 | 0.68 | 7.0 |
| SZ11-6300 | 6300 | 33,35/6.3,6.6,10.5,11 | 5630 | 36800 | 0.68 | 7.5 |
| SZ11-8000 | 8000 | 33,35/6.3,6.6,10.5,11 | 7870 | 40600 | 0.60 | 7.5 |
| SZ11-10000 | 10000 | 33,35/6.3,6.6,10.5,11 | 9280 | 48100 | 0.60 | 7.5 |
| SZ11-12500 | 12500 | 33,35/6.3,6.6,10.5,11 | 10940 | 56900 | 0.56 | 8.0 |
| SZ11-16000 | 16000 | 33,35/6.3,6.6,10.5,11 | 13170 | 70300 | 0.54 | 8.0 |
| SZ11-20000 | 20000 | 33,35/6.3,6.6,10.5,11 | 15570 | 82800 | 0.54 | 8.0 |
Moreover, these transformers are constructed to withstand harsh environmental conditions, which is particularly important for industries operating in remote or challenging locations. The durability of oil immersed transformers ensures that they can continue to function optimally without frequent maintenance or replacement, providing a cost-effective solution for businesses.
Cost-Effectiveness of Chinese Manufacturers
China has emerged as a leading manufacturer of oil immersed transformers, including the high-capacity 4000 kVA models. The country’s manufacturing capabilities allow for economies of scale, resulting in lower production costs. This cost efficiency translates into competitive pricing for consumers, making these transformers an attractive option for companies looking to optimize their investments.
<pAdditionally, many Chinese manufacturers adhere to international quality standards, ensuring that their products are not only affordable but also reliable. Buyers can find a range of options from different suppliers, allowing them to choose transformers that meet their specific needs without compromising on quality or performance.

