In the maintenance and management of power equipment, SF6 gas, as an excellent insulating medium, is widely used in high voltage electrical equipment. However, the moisture content of SF6 gas has a significant impact on the performance and reliability of the equipment. The role of the micro-water tester is to monitor the moisture content of SF6 gas in real time in order to find potential trouble spots in time.
1. Characteristics and importance of SF6 gas
SF6 gas full name is sulfur hexafluoride, is a colorless, odorless, non-flammable gas, with excellent insulation properties and arc extinguishing characteristics. Due to its good electrical properties, SF6 gas is widely used in gas-insulated switchgear (GIS), transformers and other high-voltage electrical equipment. With the continuous upgrading of power equipment, the use of SF6 gas is also increasing year by year. However, the high moisture content of SF6 gas can lead to decreased insulation performance and even equipment failure. Therefore, it is particularly important to monitor the micro-water content in SF6 gas.
2. Working principle of micro-water tester
The micro-water tester mainly detects the moisture content in the gas through electrochemical sensors or infrared spectroscopy technology. The electrochemical sensor uses water molecules to react with the surface of the sensor, generating an electrical signal, and then calculating the water concentration. Infrared spectroscopy, on the other hand, determines the water content of a gas by analyzing the degree of absorption of specific wavelengths of light by gas molecules. These two technologies have advantages and disadvantages, electrochemical sensor sensitivity is high, but may be interfered by other gases; Infrared spectroscopy technology is relatively stable, but the equipment cost is higher.
3. Identification basis and standard
There are a number of standards and specifications that must be followed when conducting the qualification of the SF6 gas moisture tester. The International Electrotechnical Commission (IEC) and the Chinese National Standard (GB) have put forward clear requirements for the moisture content of gas insulation equipment. For example, the IEC 60480 standard states that the water content of SF6 gas must not exceed 130 ppm (parts per million). In addition, the accuracy and reliability of the micro-water tester should also be strictly calibrated and verified to ensure the accuracy of its measurement results.
4. Application scenarios of the tester
SF6 gas micro-water tester is mainly used in all aspects of power system, including equipment production, installation, maintenance and overhaul. In the production process of the equipment, through the real-time monitoring of SF6 gas, the quality of the gas can be effectively controlled to ensure the safety of the equipment. In the equipment maintenance and overhaul stage, the micro-water tester can help technicians find potential problems in the equipment in time to avoid failures caused by excessive moisture.
5. Future development trend
With the rapid development of the power industry, the demand for SF6 gas micro-water tester will continue to grow. In the future, the technology of micro-water tester will be developed towards higher sensitivity and lower detection limits. At the same time, the popularity of portable testers will make field testing more convenient and fast. In addition, with the continuous progress of the Internet of Things technology, the micro-water tester will also gradually realize intelligence, and can transmit data in real time through the network to improve the management efficiency of the equipment. The SF6 gas moisture tester plays a vital role in the safe operation of power equipment. By monitoring the moisture content of gas, the failure rate of equipment can be effectively reduced and the reliability of power system can be improved. In the future, with the continuous innovation of technology, the micro-water tester will further improve its performance and provide a more solid guarantee for the development of the power industry.