Table of Contents
Overview of ONAN Transformers
ONAN transformers, which stand for Oil Natural Air Natural transformers, are widely used in various industrial applications due to their reliability and efficiency. These transformers operate by using oil as a coolant that circulates naturally, allowing for effective heat dissipation. The ONAN design is particularly beneficial in environments where ambient air circulation is sufficient to maintain optimal temperatures.
One notable specification of ONAN transformers is their power rating. The 400 kVA transformer is a common choice for medium-sized facilities that require a stable power supply. This transformer is designed to handle substantial loads while ensuring minimal energy losses, making it an attractive option for manufacturers and utilities alike.
China Manufacturing Company
When it comes to sourcing high-quality transformers, many companies turn to China due to its advanced manufacturing capabilities. Chinese manufacturers have developed a reputation for producing reliable electrical equipment, including ONAN transformers. They leverage modern technologies and high-quality materials to ensure their products meet international standards.
One of the key advantages of partnering with a Chinese manufacturing company is the ability to obtain competitive pricing without compromising on quality. Many of these companies are ISO 9001 certified, indicating that they adhere to rigorous quality management systems. This certification assures customers that the products they receive are manufactured under strict quality control protocols, thereby minimizing the risk of defects.
ISO 9001 Certification
| Type | Rated capacity （KVA） | Voltage combination（KV） | Off-load losses（W） | Load losses（W） | Off-load current (%) | Short-circuit voltage (%) |
| 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 |
ISO 9001 is a globally recognized standard that outlines the criteria for a quality management system (QMS). Companies engaged in the production of ONAN transformers often pursue ISO 9001 certification to enhance their operational efficiencies and customer satisfaction. This certification not only helps organizations improve their processes but also builds trust among clients and stakeholders.
For manufacturers producing 400 kVA transformers, the ISO 9001 certification serves as a valuable asset. It signifies that the manufacturer follows best practices in quality assurance, which is crucial in the electrical industry, where safety and performance are paramount. Clients can feel confident knowing that their transformers have been produced following internationally accepted standards, reducing the likelihood of issues such as overheating or failure.
