220kV GIS (Indoor) - Earth grid design
220kV GIS (Indoor) - Earth grid design
(OP)
GIS occupies much less space when compared with AIS. While this makes it desirable in places where the space is at a premium, it poses a challenge when it comes to designing the earth grid for the installation.
The location is with high soil resistivity and would it be advisable to embed the grid in the floor concrete to take advantage of the decreased resistivity!
Appreciate any advice / references.
Thanks
The location is with high soil resistivity and would it be advisable to embed the grid in the floor concrete to take advantage of the decreased resistivity!
Appreciate any advice / references.
Thanks






RE: 220kV GIS (Indoor) - Earth grid design
RE: 220kV GIS (Indoor) - Earth grid design
RE: 220kV GIS (Indoor) - Earth grid design
* Specify long ground rods
* Use diagonal counterpoises.
* Reduce soil resistivity with soil enhancement.
* Use the concrete and rebar as supplementary ground electrode.
* Interconnect ground grid if any close grid (Pwr plant, substation, etc.).
* Use the injected current to ground instead the full SC current.
RE: 220kV GIS (Indoor) - Earth grid design