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Get Pricewhy we use stones or rock pieces in transformer area? 1, Crushed stone is a highly resistive material and this is used in substations to protect the operating .
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Get PriceBy definition crushed stone is a construction aggregate. It is created by mining a suitable rock formation and then using a crusher to break down the stone into different sizes. Crushed stone differs from gravel in that gravel has a more rounded shape and is made by .
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Get PriceAug 12, 2010 · Best Answer: Substation grounding plays the primary role in several key aspects of fault clearing, equipment preservation and, most importantly, personnel protection as well. How Substation Grounds are Supposed to Work The methodology and construction specs vary, but the design criteria is the same. The ground system has three purposes, all of equal importance.
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Get PriceOct 30, 2008 · Crushed rock when wet has an approximate resistance of 3000 ohms/m. Asphalt when wet has a higher resisitiviey, approximately 9000 ohms/m. In either case their purpose is the same, to act as an insulator between people and the buried ground grid. For purposes of simulation I would use the worst case, crushed rock in this case.
Get PriceIn cases where there is no substation ground bed and the utility supplies a ground or static conductor, no connection of the safety ground bed should be made to the utility ground conductor. Additionally, the lightning arrester protection incoming to the mine should be tied to the utility ground or substation .
Get Pricecrusher rock in substation. why we use stones or rock pieces in transformer area? Crushed stone is a highly resistive material and this is used in substations to protect the operating personal from touch potential and step potential which may be very dangerous in case of an electrical fault in the substation. And the other reasons are it will ...
Get PriceFeb 15, 2009 · Thus, it is important that the resistivity of rock samples typical of the type being used in a given area be measured. So you see, the presence of crushed rocks are essentially for protecting the lives of the substation personnel and for soil moisture retention. Refer to IEEE 80-2000 for more detailed explainations. _____
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