Earth Mats Substations

Earth mat is connected to the following in a substation.

Earth mats substations.

Use of e mix a conductive earthing compound with earth mats will always improve the earth resistance. High quality insulating mats with excellent electrical insulation and mechanical. Earthing mat design for substation. In our analysis we have considered an area of 275m x 175m.

Figure 3 substation grounding. Program is designed as per ansi ieee 80 code it calculates step potential of switchyard touch potential of switchyard total length of earthing mat conductor size of earthing mat conductor and total number of earthing rods. Introduction to substation earthing grid. 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.

Normally the earth mat is buried horizontally at a depth of about half a meter below the surface of the ground and ground rods at suitable points. It will have a considerable impact on grid resistance. Earth mat in 110kv side of a 220 110 kv substation the fence equipment body tanks support structures towers structural steelworks water pipes etc. Standard crowfoot earth 25mm x 3mm copper tape x 5m long joined to a 70mm2 bcew tail 2m long.

The mats usually connect via a wire to the ground port of an electrical outlet. Catu s electrical insulating matting provide electrical protection for individual and collective protection for workers involved on electrical installations for voltages of 3 3kv 6 6kv 11kv 15kv 20kv and 33kv generally used in conjunction with additional pp such as insulating gloves for worker safety. 2 area of the substation site. From site layout we can find the area that the buried earth mat will cover.

Grounding mats are meant to bring a connection to earth indoors. 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. Go back to contents 5 3 earth mat in a sub station. It is suggested that the use of a high resistivity surface layer is capable of improving the safety.