However, conventional PD measurements, such as those specified by the IEC 60270 standard, are often affected by noise in the surrounding environment – especially during on-site commissioning and troubleshooting. As an alternative, Ultra-High Frequency (UHF) PD measurements offer a sensitivity higher than any other kind of PD measurement, such as Dissolved Gas Analysis, acoustic or conventional measurements. Performing PD measurements inside the transformer tank in the UHF range ensures that they are robust against noise in the surrounding environment. The portable UHF 800 PD measurement system is OMICRON’s latest solution for performing off-line and on-line UHF PD measurements from 100 to 2000 MHz on oil-filled power transformers. Tunable bandwidth filters ensure an optimal signal-to-noise ratio for reliable PD analysis in noisy onsite testing environments.
Partial discharge (PD) testing is a highly effective tool for insulation condition assessment and critical defect detection in oil-filled power transformers so that corrective actions can be taken before failures occur.
Measurement Alternative for Noisy Environments
PD measurements performed in the Ultra-High Frequency (UHF) range of 100 to 2000 MHz are a reliable measurement alternative. These UHF PD measurements are especially useful for on-site PD testing on oil-filled power transformers since they are robust against external signals.