After understanding the professional knowledge of transformer oil, how to purchase suitable transformer oil has become the key. Here are some practical purchasing suggestions to help you make wise choices among numerous products.

Clear requirements and precise selection

According to the type of transformer, different types of transformers have different performance requirements for transformer oil. Oil immersed power transformers adopt oil paper insulation structure, which requires high electrical performance, oxidation resistance and heat dissipation performance of transformer oil. Mineral oil transformer oil or synthetic ester transformer oil with excellent electrical performance and good oxidation stability should be preferred. Although the demand for insulation oil is relatively low for dry-type power transformers, suitable oil products should also be selected when considering functions such as heat dissipation and arc extinguishing. For transformers used in high-altitude areas, due to thin air and poor heat dissipation conditions, transformer oil needs to have characteristics such as low viscosity and high flash point to ensure normal operation in special environments; The converter transformer used for direct current transmission has specific requirements for certain special properties of transformer oil, and the selection must strictly follow the requirements of the equipment manual when purchasing.

Combined with the selection of operating environment: If the operating environment temperature of the transformer is high, transformer oil with good thermal stability and high flash point should be selected, such as certain high-temperature products in mineral oil transformer oil or synthetic ester transformer oil, to ensure that the oil will not decompose and oxidize at high temperatures and ensure the long-term safe operation of the transformer. In cold regions, low-temperature fluidity becomes a key factor. At this time, low pour point transformer oil, such as mineral oil transformer oil or vegetable oil transformer oil that has been specially formulated, can better adapt to low-temperature environments and avoid oil solidification affecting the normal operation of equipment. For transformers operating outdoors, the weather resistance of the oil should be considered. Plant oil transformer oil has certain advantages in resisting environmental factors such as ultraviolet radiation and oxidation, and can be given priority consideration.

Pay attention to quality and conduct strict testing

Check quality certification: When purchasing transformer oil, be sure to choose products with relevant quality certifications. For example, the International Electrotechnical Commission (IEC) has developed a series of standards for transformer oil, and products that comply with IEC standards are more guaranteed in terms of quality and performance. At the same time, some well-known third-party testing agencies, such as SGS, also conduct testing and certification on transformer oil. Products with these certification marks indicate that they have undergone strict testing processes and have reliable quality. In addition, different countries and regions may have their own standards and certification requirements, such as the EU's RoHS certification, which strictly limits the content of harmful substances in products. Transformer oil exported to the EU must comply with this certification requirement.

Request for testing report: Legitimate transformer oil suppliers should be able to provide detailed product testing reports, which should include testing data for various performance indicators such as breakdown voltage, dielectric loss factor, acid value, moisture content, etc. Carefully review the inspection report to ensure that all indicators meet your needs and relevant standards. If there are any doubts about the data in the test report, the supplier can be requested to explain or a professional testing agency can be commissioned to conduct a re inspection of the oil. For example, for the key indicator of breakdown voltage, if the value in the test report is lower than the standard you require, then the oil may not meet your equipment operation needs and should be carefully selected.

Conduct on-site sampling inspection: If conditions permit, on-site sampling inspection can be conducted on the purchased transformer oil. Observe the color, transparency, and presence of impurities of the oil through visual inspection. Normal transformer oil should be a light yellow transparent liquid without turbidity or precipitation. Professional testing equipment can also be used to quickly detect some performance indicators of oil products, such as flash point, moisture content, etc. On site inspections can promptly identify potential quality issues with oil products, avoiding the use of substandard products and ensuring the safe operation of power equipment.

Choose reliable suppliers to ensure after-sales service

Assessing supplier strength: Prioritize selecting suppliers with good reputation, rich production experience, and large-scale production capabilities. Strong suppliers usually have advanced production equipment and a comprehensive quality management system, which can ensure the stability and consistency of product quality. For example, some large petrochemical companies, such as Yanshan Petrochemical, have many years of experience in the production of transformer oil. Their produced transformer oil has stable quality and excellent performance, and has been widely recognized by the market. By querying the supplier's enterprise qualifications, production scale, customer evaluations, and other information, we can comprehensively understand the supplier's strength.

Understanding after-sales service: High quality after-sales service is an essential factor when purchasing transformer oil. Suppliers should be able to provide professional technical support and provide timely answers and guidance when you encounter problems while using transformer oil. For example, providing detailed operating procedures and precautions during the storage, transportation, and refueling of oil products; Assist you in monitoring and maintaining oil products during the operation of transformers, promptly identifying potential problems and providing solutions. In addition, suppliers should have a comprehensive return and exchange policy, which can promptly handle any issues with product quality and reduce your losses.

Signing a contract to clarify rights and responsibilities: When signing a procurement contract with a supplier, it is essential to clearly define the rights and responsibilities of both parties. The contract should specify in detail the specifications, quality standards, price, delivery time, after-sales service, and other terms of the product. For example, it is explicitly stipulated that all performance indicators of the product must comply with relevant standards, such as IEC standards or national standards; Agree on delivery time and location to ensure timely receipt of goods; Clarify the content and response time of after-sales service to ensure timely resolution of problems encountered during use. By signing a contract, we provide legal protection for your purchasing behavior and avoid disputes where there is no evidence to rely on.

In short, the selection of transformer oil is directly related to the safe and stable operation and service life of power equipment. By delving into the professional knowledge of transformer oil, following scientific purchasing principles, selecting suitable products and reliable suppliers, you will lay a solid foundation for the reliable operation of the power system, and achieve efficient, safe, and sustainable power supply.