Carbon monoxide detector for sulfur hexafluoride electric equipment

Abstract

The invention discloses a carbon monoxide detector for sulfur hexafluoride electric equipment, which belongs to an electric equipment detecting instrument. According to the invention, carbon monoxide is discharged at an outlet of a gas exhaust valve of the sulfur hexafluoride electric equipment and enters into the instrument through a gas-guide tube and a gas inlet of the instrument. The carbon monoxide flows into a carbon monoxide sensor by adjusting a needle valve to a set flow. After chemical reaction of CO gas in the sensor, a current corresponding to concentration of the CO gas is output. The current flows through a microprocessor and an A / D (Analogue to Digital) converter of an electronic line to an LCD (Liquid Crystal Display) to display the concentration of CO. Detected gas flows into a mass flow sensor and is discharged from an exhaust port. According to the invention, not only can low temperature failure information of decomposition of polyester ethylene and insulation paper in the SF6 electronic equipment be obtained for alarm and failure diagnosis, but also the carbon monoxide detector for the sulfur hexafluoride electric equipment has the advantages of simple structure, high sensitivity, good stability, accurate and quick test, convenience in use, and wide popularization and application prospect.

Description

technical field [0001] The invention relates to an electrical equipment detection instrument, in particular to a carbon monoxide detector for sulfur hexafluoride electrical equipment. Background technique [0002] Sulfur hexafluoride (SF 6 ) gas has excellent chemical stability and electrical properties. Therefore, it has been widely used in electrical equipment since the 1980s, and has played a very good role in the safe and economical operation of the power system. However, there are still some deficiencies in solid insulation materials, manufacturing, installation, testing methods and maintenance processes in electrical equipment. Although the products are inspected according to the requirements of the regulations when they leave the factory and put into use, it is difficult to detect local insulation defects due to the current detection methods. , so it is inevitable that some defects will be brought into the operating equipment. Under the action of heat and electricity...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in solid insulation materials, manufacturing, installation, testing methods and maintenance processes in electrical equipment. Although the products are inspected according to the requirements of the regulations when they leave the factory and put into use, it is difficult to detect local insulation defects due to the current detection methods. , so it is inevitable that some defects will be brought into the operating equipment. Under the action of heat and electricity during operation, these defects will continue to develop. Since the electrical insulation equipment is sealed during use, it is difficult for the outside world to know the faults inside in time, causing Accidents that bring significant economic losses and adverse effects to society

Although there are SO2, H2S and HF detectors at present, because the temperature of these decomposition products is above 400°C, it is impossible to early detect the low-temperature hidden dangers involving the decomposition of polyester vinyl and insulating paper. Therefore, transformers and transformers for electrical equipment , Whether there are early failures involving the decomposition of polyester vinyl and insulating paper inside the capacitor and bushing, using sulfur hexafluoride to develop a detector that can deal with the low-temperature defects of polyester vinyl and insulating paper decomposition, and prevent the occurrence of accidents, which is helpful for improving power Production, safety and economic operation will play an active role

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