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Stone Crusher In Substation. Why we use crushed stone layer in grid sub stations ,aug 12, 2010 the crushed stone bed provides an insulating buffer between workers and the mat. the stone layers resistance is sometimes 3,000 ohmsmeter or more between the worker and the mat. common question about equi-potential in substations comes up often: why add resistance to the mat if you want equi-potential?
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By using high resistivity crushed rock in substations, exposure current to workers during fault conditions can be reduced. Crushed rock is useful in reducing step and touch potentials. Resistivity value of crushed rock depends on many factors such as type of locally available material, size of stone, washed vs un-washed stone etc.
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Answer (1 of 10): A2A. Reasons for using Stones in Substation : * Power Transformers installed in the substations will have oil as cooling and insulating medium.
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May 24 2020 · Application of crushed rock is a means of controlling step voltage and touch voltage Step Voltage During a fault condition a person walking on the surface of substation can experience a voltage potential between his two feet typically assumed to be 33ft or 1m apart This causes a current to flow from one feetthrough his body to other feet
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Re: substation stones 02/15/2009 2:51 AM The purpose of crushed stones in power substations, usually about 0.08–0.15 m (3–6 in) in depth, is to retard the evaporation of soil moisture especially during dry seasons.
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Application of Crushed Rock in Substations. Jeffrey R. Jowett, Megger February 23, 2021 Columns, Spring 2021 Columns, Tech Tips. Although it can readily be overlooked, an important and fundamental consideration in any electrical application is safety, and one of the most effective tools in the application of safety is redundancy.
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Stone Crusher In Substation. Why we use crushed stone layer in grid sub stations ,aug 12, 2010 the crushed stone bed provides an insulating buffer between workers and the mat. the stone layers resistance is sometimes 3,000 ohmsmeter or more between the worker and the mat. common question about equi-potential in substations comes up often: why add resistance to the mat if you want equi-potential?
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Gravel/Stones in the substation is provided to reduce the step potential and touch potential when operators work on switchyard. 2. Power Transformers installed in the substations will have oil as cooling and insulating medium. Oil leakage takes place during operation or when changing the oil in the transformer.
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