Partial Discharge Monitoring on Rotating Machines

A variety of stress and aging factors result in partial discharge (PD) activity in rotating machines during their service life, which can cause defects and eventual dielectric failure in the insulation of stator windings.

On-line partial discharge (PD) monitoring provides you with continuous insulation condition status of stator windings while motors and generators are in operation and under the influence of deteriorating forces.

Temporary PD monitoring systems are used to periodically assess PD activity in single machines, whereas permanent PD monitoring systems assess PD activity over the entire service life of single or multiple machines. Based on the collected data, you are able to decide if and when it is necessary to schedule downtime and perform maintenance.

These monitoring systems conduct sensitive PD measurements to identify potential defects before failure occurs. Noise suppression and PD source separation algorithms are used to reliably identify harmful PD activity. Warnings and alarms are triggered when user-defined threshold levels are exceeded.

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