A Call to Action: Say YES to Restricted Earth Fault Protection

In this paper explains how certain ground faults (those in low-impedance grounded transformers or those close to the neutral of the wye winding in solidly grounded transformers) may not produce phase currents large enough to assert the 87R element.

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Author: Ariana Hargrave, Marcel Taberer, Michael J. Thompson, Swagata Das

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