Thermal management in the design process of MV GIS

In this paper we show some of the considerations for thermal design of medium voltage gas insulated switchgears (MV GIS), with reference to one of our late products. There, a consistent design was targeted, which covered ratings up to 2500 A. It is interesting to note, that before any drawing was created, the thermal concept of the new switchgear was at the heart of the very first steps of the design. The interaction between numerical simulation and physical testing is presented. Testing was not only necessary to verify models, but, conversely, input from numerical analysis helped to better understand the testing conditions and to analyze the test results.