Analysis of simultaneous ground and phase faults on a six phasepower system

An analysis is presented of any simultaneous sustained ground and phase fault. A single algebraic equation is presented for the calculation of sequence currents following a sustained simultaneous ground and phase fault at the terminals of a six-phase generator. The equation can be simulated on a digital computer or a network analyzer for the simulation of any type of fault. The connection of sequence networks is at once indicated when the sequence currents are written in the format suggested. The variety of faults on a six-phase system is far more complicated than on a three-phase system. The generalized treatment of all faults will prove useful in evolving protective relaying schemes for six-phase power systems