BSS Hochspannungstechnik GmbH
Monitoring & Diagnose

Ultra-High Frequency (UHF) Partial Discharge (PD) Monitoring System

The reliability of electrical energy networks depends on both, the quality and the reliability of its electrical equipment, e.g. power transformers. Local failures inside their insulation can lead to breakdowns and hence to high outage and penalty costs. Usually, power transformers are tested on partial discharge (PD) activity before commissioning. UHF PD monitoring can be used to prevent these events during service. Continuous monitoring exceeds the benefits of singular diagnostic measurements. Diagnostic PD measurements can provide snapshot information but no trend information. Also, temporary measurements can cause misleading interpretations due to the volatile nature of PD as measurements performed during low PD activity do not prove the general absence of PD. These drawbacks can be avoided by using continuous PD monitoring. The UHF PD monitoring system PDM-600-UHF is applicable for on- and off-line detection of PD in transformers and GIS.

The PDM-600-UHF synchronous 6-channel PD monitoring system can be used to either monitor one transformer with up to 6 UHF sensors or up to 6 transformers with each only one UHF sensor in a substation. The next figure shows an installation example using DN50/80 UHF sensors.

2 DN50/DN80 UHF sensors/unit in a transformer bank consiting of three single-phase units

UHF PD Monitoring Brochure
PDM-600-UHF
UHF Monitoring Brochure.pdf (769.62KB)
UHF PD Monitoring Brochure
PDM-600-UHF
UHF Monitoring Brochure.pdf (769.62KB)

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