Earth Mat Design For 132 Kv Substation

Introduction to substation earthing grid.

Earth mat design for 132 kv substation.

This paper presents the design of earthing systems for the 132 33kv substation in rivers state of nigeria and the review of substation practices with special reference to safety and development. Earth mat design can be done by manual calculations as well as with the help of computer software. 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. The substation grounding system comprises of a grid earth mat formed by a horizontal buried conductors before 1960s the design criterion of substation earthing system was low earth resistance earth resistance 0 5 ohms for high voltage installations during 1960s the new criteria for the design and evaluation of substation.

Can t do the earth mat design separately for each step and finally connect each steps together. Earthing mat design for sub station switchyard. Though manual calculation is a good software tools ensure a detailed design so that the earth mat is neither under designed hence safe nor this paper presents the complete design of earth mat for a 33 11kv indoor gis gas insulated switchgear. Earth mats manufactured from high conductivity copper tape also reduce the danger of exposure to high step and touch voltages to substation and authorised personnel working on high voltage switching providing reliable earthing in high fault current and step potential avoidance applications such as high voltage substations and switchrooms.

In high and medium voltage air insulated substations ais the electromagnetic field which causes are the static charges of bare cable and conductors and by the atmospheric conditions surges induce voltages at no live parts of the installation that create potential differences between metallic parts and ground and also between different points of. A real time case study has been considered and the design was done using etap electrical transients analyzer program.