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Application Guidelines for Ground Fault Protection
cdn.selinc.com(Equation 1). Zero-sequence current is also commonly referred to as ground or residual current. IIIIIrABC=• = + +3 0 Equation 1 Zero-sequence fault quantities are readily available from a fault study. The pickup thresholds are also very simple to determine from the fault study data. The majority of fault studies available
Substation Grounding Tutorial - University of Minnesota
ccaps.umn.eduNov 09, 2017 · •Fault study report, current magnitude, duration, safety margin, X/R •Rock, soil resistivity models •Body weight – IEEE 80 formulas •Simulations different conditions •Split Factor – calculation method, assumptions •Photos •Drawings •Protection data