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Types of Transformers: Dry Type vs. Oil Immersed
Transformers play a crucial role in electrical systems, and they come in various types to suit different applications. The two primary types are dry type and oil immersed transformers. Dry type transformers are known for their safety and environmental friendliness, as they do not use flammable liquids. Instead, they rely on air for cooling, making them ideal for indoor installations and urban areas where fire risk must be minimized.
On the other hand, oil immersed transformers utilize mineral oil for cooling and insulation purposes. This design allows for better heat dissipation, making them suitable for outdoor installations, especially in substations and large industrial facilities. Oil immersed transformers are generally more robust and can handle higher loads, but they require more maintenance due to the potential for leaks and environmental concerns.
| Type | Rated capacity (KVA) | Voltage combination(KV) | No-load losses(W) | Load losses(W) | No-load current (%) | Short-circuit impedance (%) |
| SC13-30 | 30 | 6,6.3,6.6,10,11/0.4 | 150 | 710 | 2.3 | 4.0 |
| SC13-50 | 50 | 6,6.3,6.6,10,11/0.4 | 215 | 1000 | 2.2 | 4.0 |
| SC13-80 | 80 | 6,6.3,6.6,10,11/0.4 | 295 | 1380 | 1.7 | 4.0 |
| SC13-100 | 100 | 6,6.3,6.6,10,11/0.4 | 320 | 1570 | 1.7 | 4.0 |
| SC13-125 | 125 | 6,6.3,6.6,10,11/0.4 | 375 | 1850 | 1.5 | 4.0 |
| SCB13-160 | 160 | 6,6.3,6.6,10,11/0.4 | 430 | 2130 | 1.5 | 4.0 |
| SCB13-200 | 200 | 6,6.3,6.6,10,11/0.4 | 495 | 2530 | 1.3 | 4.0 |
| SCB13-250 | 250 | 6,6.3,6.6,10,11/0.4 | 575 | 2760 | 1.3 | 4.0 |
| SCB13-315 | 315 | 6,6.3,6.6,10,11/0.4 | 705 | 3470 | 1.1 | 4.0 |
| SCB13-400 | 400 | 6,6.3,6.6,10,11/0.4 | 785 | 3990 | 1.1 | 4.0 |
| SCB13-500 | 500 | 6,6.3,6.6,10,11/0.4 | 930 | 4880 | 1.1 | 4.0 |
| SCB13-630 | 630 | 6,6.3,6.6,10,11/0.4 | 1070 | 5880 | 0.9 | 4.0 |
| SCB13-630 | 630 | 6,6.3,6.6,10,11/0.4 | 1040 | 5960 | 0.9 | 6.0 |
| SCB13-800 | 800 | 6,6.3,6.6,10,11/0.4 | 1210 | 6960 | 0.9 | 6.0 |
| SCB13-1000 | 1000 | 6,6.3,6.6,10,11/0.4 | 1410 | 8130 | 0.9 | 6.0 |
| SCB13-1250 | 1250 | 6,6.3,6.6,10,11/0.4 | 1670 | 9690 | 0.9 | 6.0 |
| SCB13-1600 | 1600 | 6,6.3,6.6,10,11/0.4 | 1960 | 11700 | 0.9 | 6.0 |
| SCB13-2000 | 2000 | 6,6.3,6.6,10,11/0.4 | 2440 | 14400 | 0.7 | 6.0 |
| SCB13-2500 | 2500 | 6,6.3,6.6,10,11/0.4 | 2880 | 17100 | 0.7 | 6.0 |
Ground Mounted Transformers: A Practical Solution

Ground mounted transformers have gained popularity in urban infrastructure due to their space efficiency and convenience. These transformers are typically installed directly on the ground, which makes them easier to access for maintenance and repairs. Their design often incorporates features that minimize noise and vibrations, contributing to a quieter urban environment.
In China, several companies specialize in manufacturing ground mounted transformers tailored to meet specific industry needs. These transformers often feature advanced technology, such as cold rolled oriented silicon steel core, which enhances energy efficiency and reduces losses. The integration of high-quality materials ensures that these transformers remain reliable and durable over time, catering to the growing demand for sustainable energy solutions.
The Role of Cold Rolled Oriented Si Steel Core
The cold rolled oriented silicon steel core is a critical component in the design of high-efficiency transformers. This specialized steel is manufactured through a unique process that aligns the silicon crystals, enhancing the magnetic properties of the core. As a result, transformers utilizing this material experience lower core losses, leading to improved overall performance and energy efficiency.
Companies in China are increasingly adopting this technology in their transformer production processes. By employing cold rolled oriented silicone steel cores, they can produce transformers that not only meet domestic energy standards but also compete in global markets. Videos showcasing these manufacturing processes reveal the precision and care taken to ensure quality at every step, from raw materials to finished products.

