![]() The entire electrical system is metal-enclosed, with doors often supervised by interlock systems. These aspects mainly dictate the fundamental design of a modern medium voltage switchgear. The main functionality and requirements of a medium voltage switchgear panel are the following: Segregation of electrical failures, e.g., arc flash, inside of one switchgear, guaranteeing safe operation by persons, serviceability & compactness, ability to disconnect and ground parts of the switchgear, long-time operation for several decades and limitation of heat-up of current-carrying parts. Often, air is used as an insulation medium, allowing for greater flexibility in designing and extending the line-up. Medium voltage switchgear deployed inside closed buildings is a so-called line-up consisting of typically tens of switchgear panels (Figure 1).
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September 2023
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