ABNORMALITY DETECTING APPARATUS FOR A ROTATING ELECTRIC MACHINE

There is disclosed an abnormality detecting apparatus in which noise is rejected in accordance with a noise rejection condition of each of a plurality of rotating electric machines, so that a partial discharge of the rotating electric machine is detected with high accuracy to detect abnormality. The abnormality detecting apparatus includes a plurality of partial discharge detection sections for detecting the partial discharge of the rotating electric machine, a switching unit for selecting at least one arbitrary signal from the partial discharge detection sections, a partial discharge measurement section for measuring the selected signal, a computer for arbitrarily selecting the respective partial discharge detection sections or sequentially selecting the respective partial discharge detection sections of the plurality of rotating electric machines, for carrying out measurement, noise rejection, insulation diagnosis judgement, and data management for the respective partial discharge detection sections in accordance with a measurement condition, a judgement condition, and a management condition previously determined for the respective partial discharge detection sections, and for displaying a measurement result, and a control section for controlling the switching unit and the partial discharge measurement section from the computer.