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Tips about how Are We Able To Decrease Ground Resistance?

Sometimes adding more ground rods and pipes is not going to do achieve something to bring the soil resistance down in high resistivity areas. Especially sometimes, adding more ground rods will not likely do anything to take the resistance down (the resistance stays the identical).
A fantastic comprehension of soil resistivity and related exams are extremely important. Some guidelines ought to be established to the soil testing. Similarly the testing and spacing to determine the soil resistivity with depth is very important particularly when deep grounding/earthing elements will be used.
A better than acceptable ground resistance would affect the safe operation of power system. Several various methods have been applied in earlier times to diminish the grounding resistance of the grounding system. Methods include enlarging the grounding/earthing grid, connecting the key grounding grid with the external grounding grid, enhancing the burial depth of the grounding grid, utilizing natural grounding object for example steel foundations of structures, adding long vertical grounding electrodes or pipes, and changing the soils throughout the grounding grid with low resistivity materials and chemicals.
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These methods are suitable for different geographical situations however that does not necessarily mean they are going to work without having a correct soil resistivity testing or proper evaluation and without variety of acceptable data to warrant their application. In fact, in the specific soil environment, a couple of methods can be viewed to decrease the grounding resistance effectively.
The process to provide deep vertical grounding electrodes on the grounding grid is extremely efficient at substations with small area. Using this method can utilize the low-resistivity soil layer and get rid of the high resistivity soil at the surface afflicted with freezing and occasional temperature. So that you can reduce the grounding resistance, the explosive grounding technique was proposed to reduce the grounding resistance of grounding grids in high resistivity area. The evaluation of the explosive grounding technique just like any grounding method is also suffering from cost.
One efficient approach to slow up the earthing resistance of substation is with deep ground wells electrodes. Several types of deep ground wells exist: For example you are able to drill 150 mm ground well and go 50 meters to 85 meters deep or maybe more in the earth and soon you reach moist soil ground water or limestone... The bottom well is stuffed with bentonite material and non-corrosive material to further improve resistivity.
To get your house this sort of grounding you'll need and to depend on enhanced or maybe more advanced grounding program in order to calculate correctly the grounding resistance since programs such as ETAP or SKM don't have the mandatory capacity to do these calculations since the grounding resistance of the equivalent model can't be easily calculated. The grounding resistance of an deep ground well might be calculated by numerical analysis program according soil model. The SES software program may be used.
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