The coupling capacitor type 9230/25/1-PD includes a high voltage capacitor, a high voltage filter and a measuring impedance (modified AKV 9310) in a compact design. It is optimized for measuring partial discharges together with the PD detector DDX 9121b. A half-T filter incorporated with the high voltage electrode not only attenuates any interference from the power supply, but also increases the sensitivity of the PD measuring circuit. The filter is protected from over-voltages by a mechanical spark-gap.

Advantages
• All in one solution including the coupling capacitor, the HV filter, and the measuring impedance ready to plug into PD detector and start the measurement.
• Highest accuracy results – large measurement frequency bandwidth, high stability in capacitance values with frequency and temperature guarantee a consistent and reliable measurement.
• Portable and perfect solution for onsite measurements of rotating machines (together with MIDAS 2881 and DDX 9121b).

Applications
• Distribution transformers (LV/MV)
• Instrument transformers (LV/MV)
• Rotating machines
• Switchgears (LV/MV)
• Surge arresters (LV/MV)V
• Bushings (LV/MV)
• Components testing
• Research and development