Earth Mat design for 132kvS/S

Please refer to IEEE 80.

Well the 60x60 plate digged 2m down and rammed by a pipe serve your purpose.Dont do just hearing and reading.leave it to the professionals. Hit

Please don't misguide. For an 132 kV Switchyard, the solution suggested by you (60 x 60 Plate) would definitely not help. The GPR would be so high as to cause unacceptable Step & Touch Potentials.

You can check standing surface insulation by using Gossen Metrawatt Profitest Mtech installation tester. Select a MAT after the test which have required insulation and again do the test for confirmation.

How can he check it, he hasn't installed it yet.

Although I doubt he ever will, looks like a homework question to me.

one cannot reply in short form . You have to under go rigorous exercise with guidance of IEEE80 as suggested by Electrical Expert 65.