3. Earth-fault protection for impedant neutrals
3.1 Current flow in the event of earth faults
3.1.1 Equivalent zero-sequence diagram
Before discussing protection settings, it's essential to understand the flow of currents that a stable earth fault causes in the network. The diagram at 4 illustrates this flow in the case of an open fault: the voltage of the faulted phase with respect to earth is zero, and the voltages of the healthy phases become equal to the compound voltage....
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Earth-fault protection for impedant neutrals
Earth-fault protection for compensated neutrals
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