Earth Mats Substations

Earthing mat design for substation.

Earth mats substations.

The mats usually connect via a wire to the ground port of an electrical outlet. The mats may be placed on the floor on a desk or. 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. Earth mat is connected to the following in a substation.

Go back to contents 5 3 earth mat in a sub station. It is bonded to the local supporting metal structure and to the handle of the switchgear so that the operator will not be exposed to a high differential voltage due to a fault. 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. Standard crowfoot earth 25mm x 3mm copper tape x 5m long joined to a 70mm2 bcew tail 2m long.

From site layout we can find the area that the buried earth mat will cover. Introduction to substation earthing grid. Grounding mats are meant to bring a connection to earth indoors. 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. 2 area of the substation site. Figure 3 substation grounding.

In an electrical substation a ground earth mat is a mesh of conductive material installed at places where a person would stand to operate a switch or other apparatus. It is suggested that the use of a high resistivity surface layer is capable of improving the safety. 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. Use of e mix a conductive earthing compound with earth mats will always improve the earth resistance.