FIELD: electrified transport. SUBSTANCE: invention can be used in power supply system for revealing short-circuits. Proposed fault detector for contact system has current and voltage sensors of first and second substations, feeder current sensor of damaged contact system, setters of signals defining distance to substation or sectioning position, and multifunctional converters. First multifunctional converter is made for forming output signal corresponding to distance from first substation to place of short circuit. Error caused by neglecting of current phase angles is determined. EFFECT: improved accuracy of short-circuit fault location in traction system. 2 cl, 3 dwg
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