Material and simulation technology for solid insulated switchgear

We have developed solid insulated switchgear(SIS), which is designed for SF/sub 6/-free innovative medium voltage applications. A new epoxy casting material is applied, which contains a great deal of spherical silica to reduce viscosity and increase mechanical strength. This material has the high glass transition temperature, which provides high thermal resistance and also high toughness for directly molding the vacuum interrupter. The switchgear consists of some complicated casting insulators such as bushings and cable heads. These insulators are manufactured by the high-cycle automatic pressure gelation method. The flow and cure analysis of the casting material visualizes the curing process inside the molds and suggests the best manufacturing conditions such as temperature, speed and time.