Disconnecting switch

摘要

Equipment size and product cost have been increased so far in an attempt to ensure dielectric strength in the face of increased electric field on the tips of a movable contactor and a fixed contactor of a disconnecting switch. The present invention permits equipment downsizing and production cost cutting while securing the dielectric strength of insulated switchgear. (Means of Solving the Problems) <??>A field relaxation electrode is arranged on the movable contactor of a disconnecting switch, and the movable contactor can be connected with the fixed contactor by changing the position of the field relaxation electrode, depending on whether the circuit is open or closed. (Effect) <??>When a field relaxation electrode is arranged in the movable contactor of switchgear as described above, the ground dielectric strength and inter-polar dielectric strength in the open circuit position can be improved to permit downsizing and cost cutting of equipment. Further, the scope of application of the equipment on a system can be expanded by improving the charging current breaking performance and exciting current breaking performance. <IMAGE>