Characteristics of Short Circuit Electromagnetic Forces in Three Phase Enclosure Type Gas Insulated Bus

The effects of the enclosure material to the electromagnetic force and the dynamic performances of the force have been measured in case of 3ϕ fault and ϕ-ϕ fault, using three phase enclosure type gas insulated bus (GIB) models. The analysis for the electromagnetic force has been performed and compared with the experimental results. Mild steel and stainless steel enclosure have little influence to the electromagnetic forces between the phase conductors, whereas the forces are fully reduced by the existence of aluminum alloy enclosure.