Patent ID: 8569637

Claim:
An interlock apparatus for a solid-insulated switchgear having a main circuit switching mechanism and a ground circuit switching mechanism, wherein the main circuit switching mechanism and ground circuit switching mechanism are provided laterally in a horizontal direction and each include a switching shaft, a switching shaft lever supported by the switching shaft to be rotated together, a closing button for manual closing operation, an on-shaft connected to the closing button and having a released position for moving the main circuit switching mechanism to a closing position and the ground circuit switching mechanism to a ground position, and a locking position for locking the main circuit switching mechanism and ground circuit switching mechanism such that the main circuit switching mechanism is prevented from moving to a closing position simultaneously with the ground circuit switching mechanism moving to a ground position, the interlock apparatus comprising: a first interlock mechanism provided between the main circuit switching mechanism and ground circuit switching mechanism and connected to the switching shaft of the ground circuit switching mechanism in an interlocking manner to press the on-shaft of the main circuit switching mechanism into the locking position or to release the on-shaft on shaft of the main circuit switching mechanism; and a second interlock mechanism provided between the main circuit switching mechanism and ground circuit switching mechanism and connected to the switching shaft of the main circuit switching mechanism in an interlocking manner to press the on-shaft of the ground circuit switching mechanism into the locking position or to release the on-shaft of the ground circuit switching mechanism.