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A Method to Apply IEEE Std. 80 Safe Touch and Step ...
Page 1of 13A Method to Apply IEEE Std. 80 Safe Touch and StepPotentials to Relay CoordinationDr. Lance Grainger, P. Eng. & Mr. Richard Boulton, P. 29, 20051 IntroductionThe purpose of this paper is to outline a Method of integrating protection & control designpractices and grounding design practices. We will show how to relate body current to thesubstation ground fault current and use this to develop a Human Tolerance Curve which can beplaced on a relaying time current coordination curve. We will then show a Method to coordinatethis with protective relaying, giving an example of a re-closer application.
Page 1 of 13 A Method to Apply IEEE Std. 80 Safe Touch and Step Potentials to Relay Coordination Dr. Lance Grainger, P. Eng. & Mr. Richard Boulton, P. Eng.
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