避雷器的常见故障及红外诊断

Usual Failure and Infrared Diagnose of Arrester

对运行中的避雷器进行在线红外诊断是电力设备带电诊断行之有效的技术手段。分析了FS、FZ、FCZ、FCD型避雷器和金属氧化物避雷器在正常状态和故障状态的发热特点,认为避雷器故障主要是受潮引起的,热像特征主要表现为局部温升。用红外热像仪对运行中的避雷器进行红外测温和故障分析,结果表明,应用红外诊断技术检测避雷器故障,可靠性较高。

Line infrared diagnose on agnosing of power equipment. The thermal running arrester is an effective techno-measure for live-difeature of lightning arresters of FS, FZ, FCZ and FCD, and metal oxide surge arresters was analyzed when it is in normal and faulty condition and the basic method of failure detection. And it explain the elemental principle of infrared thermometer and in the end introduce the application of infrared diagnose. It is considered that the failure of surge arrester is caused mainly by moisture ingress which characterized by local temperature rise. Temperature inside surge arresters is measured in service with infrared thermometer and the service status being analyzed. The result shows that high reliability of surge arrester diagnose can be obtained using infrared technology.