Patent ID: 8487203

Claim:
A disconnecting switch with earthing switch comprising: a sealed tank; two main circuit conductors disposed in the sealed tank so that extended axes thereof intersect with each other; a disconnecting switch being disposed on one main circuit conductor side, the disconnecting switch having a disconnecting switch-side fixed contact and a disconnecting switch-side moving contact that linearly reciprocates in a hollow disconnecting switch-side conductor; an earthing switch being disposed between the other main circuit conductor and the sealed tank, the earthing switch having an earthing switch-side fixed contact and an earthing switch-side moving contact that linearly reciprocates in a hollow earthing switch-side conductor; and an operating shaft allowing the disconnecting switch-side moving contact and the earthing switch-side moving contact linearly reciprocates with the rotation thereof, the operating shaft being disposed on the bisector of an open angle of substantially a right angle formed by axes of the disconnecting switch-side conductor and the earthing switch-side conductor; a two-hole lever connected to the operating shaft to allow an arc motion; and two curved links, each one end thereof is connected to the two-hole lever and the other end thereof is respectively connected to a disconnecting switch-side moving contact or an earthing switch-side moving contact, wherein when two connecting points where the disconnecting switch-side moving contact and the two-hole lever are connected to the disconnecting switch-side curved link and two connecting points where the earthing switch-side moving contact and, the two-hole lever are connected to the earthing switch-side curved link are axisymmetric with respect to the bisector, both the disconnecting switch and the earthing switch are in an open state, when the two-hole lever moves at a predetermined angle from the open state to the disconnecting switch-side, the disconnecting switch is in a closed state, and when the two-hole lever moves at a predetermined angle from the open state to the earthing switch-side, the earthing switch is in a closed state.