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Determination of the Soil Parameters of the Outdoor Switchgear in the Dense Urban Development

The grounding system provides electrical safety for staff and the reliability of expensive equipment of outdoor switchgear. Testing the grounding system in accordance with modern standards requires the determination of soil parameters as a dependence of apparent resistivity on the sounding depth. The impact multivariate interpretation of the results of sounding on the calculation of touch voltage is presented. In this work, combined technique of soil sounding has been developed, which allow complex testing of the grounding system in accordance with the IEEE and IEC standards. Comparison of the interpretation of sounding results by the traditional Wenner configuration and the combined technique is given.