1. Oil injection of the main transformer

Oil injection of the main transformer refers to the transformer oil into the main transformer, so that the interior reaches a certain oil level and oil pressure. Transformer oil not only has the functions of cooling, insulation and anti-corrosion, but also can transfer heat through heat conduction and cooling, to ensure the uniform distribution of the temperature inside the transformer. The main transformer is usually filled by immersion method or pressure oil injection method. In the process, attention should be paid to the quality and quantity of transformer oil, as well as the time, pressure and speed.

2. Thermal oil circulation of the main transformer

Thermal oil circulation refers to the oil inside the transformer through pumping, heating and cooling, so that it reaches a stable temperature and flow. The main function of the hot oil circulation of the main transformer is to ensure the uniform distribution of the temperature inside the transformer, prevent the aging and deterioration of the transformer oil, and improve the operation efficiency and safety of the transformer. In the process of hot oil circulation, it should be necessary to pay attention to the parameters of hot oil flow, temperature and pressure, as well as the safety and stability of the circulation system.

3. Seal test for the main transformer

Main transformer seal test refers to the process of testing and evaluating the sealing of the main transformer. The sealing ability of the main transformer has an important influence on the operation efficiency and safety of the transformer. Main transformer seal test usually includes static seal test and dynamic seal test. Static seal test refers to the sealing test of the transformer in the static state, usually using the pressure change method or air tightness detection method. Dynamic seal test refers to the detection of the sealing ability of the transformer in operation, usually using the leakage rate test method or infrared detection method. During the sealing test, attention should be paid to the test environment and conditions, as well as the accuracy and reliability of the test results.

4. Note for oil injection, hot oil circulation and sealing test of the main transformer

a. Selection of transformer oil: in the process of oil injection and circulation, it is necessary to select good quality transformer oil and ensure that it meets the relevant standards and requirements.

b. Setting of oil injection and cycle parameters: In the process of oil injection and cycle, it is necessary to set appropriate parameters according to the characteristics and requirements of the transformer, including oil injection volume, oil injection speed, oil injection pressure, circulation flow, circulation temperature and circulation pressure, etc.

c. Safety and skills of operators: oil injection, hot oil cycle and sealing test are operations involving high temperature, high pressure, flammable and toxic substances, which need to be carried out after professional training and certification.

d. Safety and protection of equipment and environment: In the process of oil injection, hot oil circulation and sealing test, the relevant equipment and environment need to be protected and safety controlled to prevent accidents and losses.

5. conclusion

Oil injection, hot oil circulation and sealing test of main transformer are indispensable links in the production, installation and operation of main transformer. Through oil injection, hot oil circulation and sealing test, the quality and state of the oil inside the main transformer can be guaranteed to ensure its safe and reliable operation. Therefore, in the process of oil injection, hot oil circulation and sealing test, the relevant regulations and standards should be strictly adhered to to ensure the safety and effectiveness of the operation.