The matter of grounding systems in substations is vital. The main functions of a grounding system are: 1. Provide the neutrals of generators, transformers, capacitors, and reactors a connection to the earth 2. O. Substation safety requires the grounding and bonding of all exposed metal parts. The metallic structures, generators, transformer tanks, circuit breakers, switchboards, sw. The grounding network contains the conductors responsible for offering a low impedance path between the equipment frames or metallic structures and the connection to th. There are three main methods to connect a substation grounding network to the earth: 1. Radial 2. Ring 3. Grid The radial system consists of one or more grounding electrodes with c. The primary purpose of a grounding grid is to equalize the potential gradients above the grid, protecting people and equipment. Under ground-fault conditions, the portion of the fault curren.