Earth Mat Design Calculation

Maximum symmetrical fault current.

Earth mat design calculation. The grounding system in substation is very important. In our analysis we have considered an area of 275m x 175m. The average soil resistivity measured as. Today we are going to discuss the design of substation earthing system.

Earth mat design for 132kv substation in rivers state using etap pdf. It is suggested that the use of a high resistivity surface layer is capable of improving the safety while designing substation earthing grid in high resistivity. Difference between grounding earthing and bonding. The substation earthing system comprises of a grid earth mat formed by a horizontal buried conductors.

Can t do the earth mat design separately for each step and finally connect each steps together. It will have a considerable impact on grid resistance. Earth mat design calculation for 33 kv s stn for m s sukhbir agro energy ltd shahjahanpur u p. The cross section of the buried cable should calculated in accordance with the value of the phase to earth short circuit current but it is common to use the three phase short circuit current for this purpose.

The earthing grid can dis sipate the fault currents so. Is to be considered as 1 sec. Important formulas for designing a substation grid earthing system. We have already given an introduction to substation earthing system in an article published earlier.

Design calculation are based on ieee80 2000. Could u please explain me how to do the earth mat design for 220 132 33 kv outdoor gss which have 5 steps 135m 138m 141m 144m 147m. Before 1960s the design criterion of substation earthing system was low earth resistance earth resistance 0 5 ohms for high voltage installations. We use safegrid earthing software for the design of earth grid on complex renewable energy projects including anaerobic digestion plants wind farms and solar farms.

For earth mat design for hv s stn. Read about design of substation earthing system here. Duration of fault.