Short Circuit Arc Effect of GIS Equipment and Design of Pressure Release Device
This paper analyzes the consequences of internal short circuit arcs in GIS equipment,describes the calculation method of pressure rise in air chamber and burning time of casing for abnormal GIS equipment,and preliminarily explores the effective protective measures for the casing,i.e.,the reasonable design of pressure release device.At the same time,taking a certain 550 kV GIS equipment as an example,the pressure change in the gas chamber and the burning time of the shell during the occurrence of a short-circuit arc are calculated.The results show that the shell design of each gas chamber met the requirements and there was no possibility of burnthrough or rupture.