Transactions of the American Institute of Electrical Engineers · 1938 · 16 citations · 3 references
EngineeringElectrical EngineeringCircuit TheoryPower ElectronicsUnmanned Aircraft SystemsPilot ImplementationProtection SystemsDistance ProtectionProtection RelayingProtective RelayingRelay Protection
This paper outlines the reasons for application of pilot relay equipment, particularly of the carrier-current type. A one-cycle carrier-pilot-relay scheme is described which now makes available the desirable high-speed and back-up characteristics of step-type distance protection combined with the 100 per cent simultaneous tripping feature possible with a pilot circuit. Impedance and over current supervised single-phase directional elements are utilized for controlling carrier on phase and ground faults, respectively.
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