Partial Discharge Measurement and Analysis on Power Transformers

Partial discharges (PD), as defined by IEC 60270, are localized dielectric discharges in a partial area of a solid or liquid electrical dielectric insulation system under high-voltage field stress. Partial discharges in a transformer deteriorate its insulation and can lead to failure of the transformer.

Diagnostic PD measurements are recommended after conspicuous measured values, such as increased gas-in-oil values or after a failed PD measurement during acceptance tests.

With our testing systems, you can detect partial discharges already in their early stages and determine their source locations acoustically. This allows you to draw conclusions regarding the condition of the insulation. At the same time, further measures such as repair or additional diagnostic measurements can be initiated.

Customizable user profiles

You can easily define individual test specifications, including calibration and measurement settings, based on applicable international standards for specific types of PD tests and test objects, and save them as profiles for current and future use. In addition, you can decide which of the available PD measurement and analysis software features you need for a particular PD measurement, hiding those you do not need at any time for individualized PD testing and reporting.

Benefits of this solution

Meets industry standards

The MPD 800 measures partial discharge in compliance with the IEC 60270 standard to ensure the reliable detection of PD activity in power transformers.

Safe operation

Maximum operator safety is ensured with fiber optic cables, which enable complete electrical isolation between the user, computer, recording unit and the test object.

Reliable noise filtering

The MPD 800 provides you with a free choice of measurement frequency and bandwidths to maximize measurement sensitivity in environments with high interference.

Advanced analysis tools

The MPD 800 uses advanced graphical tools, such as 3PARD (3-Phase Amplitude Relation Diagram), to separate multiple partial discharge sources for reliable fault detection.

MPD 800 + PDL 650

The combination of the MPD 800 and the PDL 650 enables you to perform partial discharge measurement (PD) and localization on power transformers. If PD activity is detected, the MPD 800 automatically triggers the PDL 650 to perform acoustic PD measurements to effectively locate the source of the PD activity inside the transformer. The location is shown in a 3D image of the transformer to enable you to focus maintenance efforts.

MPD 800

Universal partial discharge measurement and analysis system

PDL 650

Acoustic partial discharge localization in power transformers

Request info

CPC Sync

Using the CPC Sync functionality, you can synchronize up to three CPCs to create a HV source (up to 15 kVA) for testing dry-type transformers. The induced voltage can be used for voltage withstand tests and partial discharge measurements.

CPC 100

Universal primary injection test set for substation assets

CPC 100

Universal primary injection test set for substation assets

Request info

UHF 800 + MPD 800 + PDL 650

Our portable, easy-to-use UHF 800 system performs sensitive offline and online partial discharge (PD) measurement and analysis in the ultra-high frequency (UHF) range from 100 to 2000 MHz on oil-filled transformers. This ultra-high frequency partial discharge testing system is used during on-site commissioning (acceptance testing) and troubleshooting for added measurement sensitivity in noisy testing environments. It can be optionally combined with our MPD 800 PD measurement and analysis system and our PDL 650 PD defect localization system for comprehensive insulation condition assessments and insulation defect detection and localization.