Experimental evaluation of potential distribution in a grounding grid subjected to impulse current

17th TC-4 Workshop IWADC on ADC and DAC Modeling and Testing July 18th and 19th 2013 Barcelona 35 Evaluation of the Uncertainty of Calibration the of Three Phase High Precision Comparator of the Electrical Power O. Velychko88, S. Karpenko88, V. Gachok88 The paper describes the evaluation of the uncertainty of calibration results three phase high precision comparator of the electrical power on the State Standard of the unit of the electrical power of Ukraine (DETU 08-08-02). This work aims to propose a methodology to evaluate the response of a grounding grid system subjected to impulses of electrical current analysing voltage signal propagated in the vicinity of the electrode injection. Signals 8/20 µs were applied to the soil using an impulse generator (80 kJ/100 kV). The signals were acquired with a digital oscilloscope and the results demonstrated that the amplitude of propagated voltage is attenuated in the direction of propagation. The structural scheme of calibration of high precision comparator on the DETU 08-08-02 Setup of the experiment to obtain data of voltage and current. 11PE014 Experimental Evaluation of Potential Distribution in a Grounding Grid Subjected to Impulse Current M. S. de Castro89, R. C. S Freire89, E. G da Costa89, E. C. T. Macedo90, N. S. S. da Fonsêca89, T. L. Silva89 11PE025