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Detection of phase-to-earth faults on 3-phase windings with earthed neutral, by
comparison of residual current calculated from the 3 phase currents and residual
current measured at the neutral point.
Characteristics
comparison of residual current calculated from the 3 phase currents and residual
current measured at the neutral point.
Characteristics
- instantaneous tripping
- percentage-based characteristic with fixed slope and adjustable low set point
- more sensitive than transformer or machine differential protection.