4. Earth-fault protection for radial networks with low-impedance neutrals
4.1 Current flow in the event of ground faults
4.1.1 Equivalent zero-sequence diagram
Before tackling protection settings, it's essential to understand the flow of currents that a stable earth fault causes in the network. The diagram at 11 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...
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Earth-fault protection for radial networks with low-impedance neutrals
Earth-fault protection for neutral-compensated radial networks
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Bibliography
- (1) - WILLHEM (R.), WATERS (M.) - Neutral grounding in high voltage transmission. - Elsevier publishing company.
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