Understanding the Temperature Profile of the IEC TS 62332-1 Dual-temperature Ageing Cell

This paper discusses the challenges faced during the development of a dual-temperature test cell based on IEC technical specification TS 62332-1 to evaluate the ageing performance of transformer insulation systems. A dual-temperature test cell was built based on IEC TS 62332-1 and the performance of the test cell was investigated accordingly. Apart from measuring the conductor and the top liquid temperatures, additional temperature measurements were conducted in other locations including hot solid insulation, cold solid insulation, liquid immersion heaters and test cell surface. Temperature distribution inside the dual-temperature test cell is then analyzed. The results indicate the importance of location of top liquid temperature thermocouples and its effect on the overall temperature distribution. Some additional aspects for maintaining consistency between different test cells are also discussed.</p