Switch device

Abstract

In this switching device, a field relaxation electrode is provided on the movable contact of a disconnector so that the movable contact can be connected to a fixed contact by changing the position of the field relaxation electrode between an open state and a closed state. By providing the field relaxation electrode on the movable contact of the disconnector, the ground dielectric strength and interpolar dielectric strength in the open state position can be improved to reduce the size and cost of the equipment. By improving the charging current interrupting performance and exciting current interrupting performance, the applicable range on system of the equipment can be extended.

Description

technical field [0001] The invention relates to a switchgear suitable for substations, switching stations, substations for power distribution, etc. of civil ultra-high input power transformation equipment or power systems. Background technique [0002] In the prior art, such as the gas insulated switchgear of Japanese Patent Application Laid-Open No. 10-155215, in a circuit breaker, a knife-shaped movable contact rotates around the rotating shaft of the movable side conductor, and moves from and to The closed circuit position of the fixed contact connection is the open circuit position when the rotary lever is turned 45 degrees, and the position where it is turned 45 degrees is the grounding position, which becomes a structure connected to the grounding terminal, constituting a circuit breaker with a grounding device. [0003] In recent years, with the trend of easing international regulations on electric power business, there has been an increasing demand for substantial co...

AI Technical Summary

Problems solved by technology

The insulating performance and arc extinguishing performance of these gases are due to the ratio of SF 6 Gas is poor, so there is a problem that the size needs to be increased and the cost is increased compared with the conventional equipment insulated by gas

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