This paper aims at investigating the dissolved gas analysis (DGA) and long-term performance of Environtemp (FR3) and Jatropha Curcas oil (JAT). Thermal stress is applied to both oils in a sealed setup at 150°C for up to 2000 hours and samples are removed and tested at 500 hour intervals. It is observed that FR3 is more prone to stray gassing as compared to JAT. The alterations in the structure of the oils are studied by Fourier-transform infrared spectroscopy (FTIR) and 600 MHz nuclear magnetic resonance (NMR) spectroscopy analyses. The DGA interpretation is done using the Duval triangle, Dornenburg ratios, Rogers ratios and IEC methods. In the proposed study, a regression model for the two types of oils is developed to predict the total dissolved combustible gases with time. The findings show that JAT holds considerable properties of an insulating fluid and is a substitute for mineral insulating oils.

中文翻译：

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非食用天然酯溶解气体分析及长期性能评价

本文旨在研究环境温度 (FR3) 和麻疯树油 (JAT) 的溶解气体分析 (DGA) 和长期性能。在 150°C 的密封装置中对两种油施加热应力长达 2000 小时，然后每隔 500 小时取出样品并进行测试。据观察，与 JAT 相比，FR3 更容易产生杂散放气。通过傅里叶变换红外光谱 (FTIR) 和 600 MHz 核磁共振 (NMR) 光谱分析来研究油结构的变化。DGA 解释是使用 Duval 三角形、Dornenburg 比率、Rogers 比率和 IEC 方法完成的。在拟议的研究中，开发了两种油类的回归模型，以预测随时间变化的总溶解可燃气体。