| 摘要 |
<p>PURPOSE:To prevent occurrence of malfunctions and breakages in the control system of each equipment by burying grid-like auxiliary meshes electrically connected to one another in the ground where a switch main body, bushing yard, and connecting gas-insulated bus are provided. CONSTITUTION:Metallic containers of each equipment provided in a bushing yard are grounded by using an auxiliary mesh 5a buried in the ground of the bushing yard 2. On the other hand, in the ground where gas-insulated buses 3 connecting a switch main body 1 with the bushing yard 2 are installed, earth lines are buried in a grid-like form so as to connect two earth lines buried along the buses 3 and auxiliary meshes 5b for the gas-insulated buses 3 and metallic containers of the gas-insulated buses 3 are connected to one another in various places. Moreover, these auxiliary meshes 5, 5a, and 5b are electrically connected to one another so that the same potential can be maintained across them and they are also connected to the earth line constituting a main mesh 4 so as to obtain the earth potential.</p> |
