The reason being unable to reset the main valve in the hydraulic control system of circuit breaker in GIS due to the crack of high pressure oil tube is analyzed in this paper.

• 本文阐述了GIS中高压断路器用液压机构因高压油管破裂所引起的液压系统中控制主阀不能复位的原因,以及防止和处理类似故障的方法。