Grounding requirement for Outdoor MV (13.2KV) Fusible switch switchgear line up.

[power2engineer]

My question is relating to the details of installation of outdoor MV (13.2KV) Fusible disconnect switchgear line up in an industrial facility. The Switchgear ground bar, mounting pad re-bars should they all be tied to 4/0 direct buried ground loop with ground rods at each corner of the pad along the perimeter of the Switchgear?

 

[RRaghunath]

Isolated MV substation like this one is supposed to have earth resistance of less than 5 Ohms.
The arrangement explained by you seems good and may be adequate if it can ensure earth resistance of not more than 5 Ohms.