Resumen
Method of locating ground faults in armature windings of synchronous machines during the process of stopping the machine, comprising: - the disconnection of the machine from the network by opening the generator switch (10); - the measurement of the voltage induced in the three phases (16, 17, 18) with respect to earth, after the opening of the group switch (10); - the determination of the phase with defect by comparing the three phase-earth voltages measured in the phases (16, 17, 18), with the lowest voltage having the defect (18); - the calculation of the phase-neutral voltage in any of the healthy phases (25, 26); - calculation of the percentage of the winding where the defect is found by the relation between the phase-earth voltage of the phase with ground fault (18) with respect to the calculated phase-neutral voltage in any of the sound phases (25, 26) ). (Machine-translation by Google Translate, not legally binding)