FIELD: electrical measurement technology.
SUBSTANCE: first phase with damage insulation is found and power line is switched off of three-phase power line. Second and third phases with non-damaged insulation are closed to ground by means of jumpers at beginning and end of power line at known distance from start point of power line. Single-phase ac source is removed from beginning of power line between first phase with damaged insulation and ground. Voltage between first phase with damaged insulation and ground at beginning of power line is measured, then current is measured in first phase as well as phase angle between the voltages and current. After it distance to single-phase short-circuit is determined.
EFFECT: increased precision of measurement.
3 dwg
