Partial Discharge Measurement and Analysis on Rotating Machines

Partial discharge (PD) occurs in the stator insulation system of rotating machines, where local electric field stress exceeds the local electrical strength. Compared with other dielectric tests, the differentiating character of partial discharge measurements allows localized weak points of the insulation to be identified.

PD measurements based on IEC 60034-27 standards can be performed on motors and generators either off-line by energizing each winding successively during standstill of the machine or on-line during regular load service operation.

The key to successful PD measuring in stator windings is the separation of parallel active PD sources and the distinction between harmful PD, normal PD occurrences and outer noise, inevitably present in industrial surroundings.

This is best achieved by synchronous, multi-channel partial discharge measurement. This separates internal PD sources from each other and from noise signals.  PD sources are evaluated individually within the stator winding.

Expert recommends

MPD 800

Our MPD 800 universal partial discharge (PD) measurement and analysis system represents the next generation of our widely-used and innovative MPD PD testing technology. Enhanced and newly-added hardware and software features ensure highly-sensitive multi-channel PD measurements for reliable, industry-standard PD testing on motors and generators. It accurately detects and localizes insulation defects and helps you to reliably assess the risk of failure in rotating electrical machines.

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MPD 800 – Universal partial discharge measurement and analysis system

Partial discharge testing on rotating electrical machines

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