This is a diagram of a GIS substation of 132/20 kV transformer ratio with 90 MVA of transformation.
Drawing labels, details, and other text information extracted from the CAD file (Translated from Spanish):
date, drew by, size, scale, MVA Relay Distribution Substation, Plan nº:, Simplified single line plan, Meco, Alkaline, Meco, Alkali ii, Armored cells in ka, Mva, Ofaf, Mva, Ofaf, Mva, Ofaf, Kva