In this work, mineral oil and synthetic esters were selected at different ageing factors (based on acidity values). Fresh and aged oils have been subjected to high-energy discharges (repeated 100 breakdowns) to simulate electric faults of highly vulnerable intensity. The intent of this work is to understand the influence of high-energy electric faults on oil degradation and gassing tendency at different ageing conditions. In this study, the influence of the high-energy discharges on degradation and gassing tendency at different ageing factors is reported for mineral oil and synthetic esters. Oil degradation is reported by adopting ultraviolet spectroscopy, turbidity and particle counter as per american society for testing and materials (ASTM) standard test methods. Gassing tendencies and fault gas analysis are understood by dissolved the gas analysis using Duval's triangle and Duval's pentagon methods for mineral and non-mineral oils. It is found that the influence of high-energy discharges on oil degradation is higher in mineral oils to that of the synthetic esters. The intensity of the gassing tendency is higher for ester fluids; however, as per the Duval methods, the faulty conditions are at lower levels as compared to mineral oils.

在这项工作中，根据不同的老化因子（基于酸度值）选择了矿物油和合成酯。新鲜和陈旧的油已经过高能量放电（重复击穿100次），以模拟高度脆弱的电气故障。这项工作的目的是了解在不同老化条件下高能电气故障对油品降解和放气趋势的影响。在这项研究中，报告了矿物油和合成酯在不同老化因子下高能放电对降解和放气趋势的影响。通过采用美国光谱学会测试和材料（ASTM）标准测试方法的紫外光谱，浊度和颗粒计数器报告了油的降解。通过对矿物油和非矿物油使用杜瓦尔（Duval）三角和杜瓦尔（Duval）五边形方法进行溶解气体分析，可以了解析气趋势和故障气体分析。发现在矿物油中高能放电对油降解的影响比合成酯高。酯液的放气趋势强度较高；但是，按照杜瓦尔（Duval）方法，与矿物油相比，故障条件处于较低的水平。