RING-SHAPED COIL SPRING OF SWITCHGEAR AND SWITCHGEAR USING SAME

In order to adapt to a lineup of various connection portions of a gas-insulated switchgear, springs having various spring loads are needed, so that the types of components increase. On the other hand, if a spring corresponding to the maximum conduction current is set as standard specifications, such a spring has an excessive quality for a product for small conduction current. Accordingly, an end of a ring-shaped spring having such a structure that a metal material for spring is formed in a ring shape so as to partially overlap each other is passed through a spring gap of a ring-shaped coil spring to the inside of the coil, thereby mounting the ring-shaped spring. Thus, it is possible to obtain a necessary contact load without increasing the types of the ring-shaped coil spring.