Table of Contents
Overview of ONAN Transformers
ONAN transformers, or Oil Natural Air Natural transformers, are widely used in various industrial applications due to their efficient design and reliability. These transformers are cooled by the natural circulation of oil and air, which helps maintain optimal operating temperatures. The ONAN cooling method is particularly effective for larger transformers, such as those with a capacity of 7000 kVA.
In today’s energy landscape, the demand for high-capacity transformers like the 7000 kVA ONAN transformer is increasing. This growth is driven by the need for efficient power distribution and management in urban areas and industrial sectors. As a result, manufacturers in China have ramped up production to meet both domestic and international demands.
Chinese Manufacturing Companies
China has emerged as a leading manufacturer of electrical equipment, including ONAN transformers. Companies in this region leverage advanced technology and skilled labor to produce high-quality transformers that meet global standards. The competitive pricing offered by these manufacturers has further solidified China’s position in the global market.
Many Chinese manufacturing companies focus on innovation and sustainability, ensuring that their products are not only efficient but also environmentally friendly. By investing in research and development, these companies are able to produce transformers that incorporate the latest technologies, contributing to improved energy efficiency and reduced carbon footprints.
| 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 |
Long Warranty Periods
One of the significant advantages of purchasing a 7000 kVA ONAN transformer from a reputable Chinese manufacturer is the long warranty period offered. Most manufacturers provide warranties ranging from 5 to 10 years, which is a testament to the durability and reliability of their products. This extended warranty period instills confidence in customers, knowing that their investment is protected.
Having a long warranty is especially important for industries that rely heavily on uninterrupted power supply. It not only reduces maintenance costs but also ensures that any potential issues can be addressed promptly without incurring additional expenses. Customers can have peace of mind, knowing that their ONAN transformers will perform optimally over the years, even under demanding conditions.