The online Partial Discharge Monitoring System (PDMS) from ohv diagnostic is a comprehensive monitoring system for assessing performance of the dielectric condition in rotating machines, transformers, GIS and cables. By way of long-term monitoring of partial discharge behavior, the operational reliability of the insulation in critical assets can be assessed on real-time basis. And it helps generate valuable information for maintenance planning and repairs when they are required. Or in many cases PD assessment can help avoid or postpone the inspection and maintenance plans to prioritize the operational availability of the assets.

The key element of the PDMS is the partial discharge data acquisition (DAQ) unit which detects the high frequency PD impulses from the sensors, converts them into data packages sending them via fiber optic cable to the server. The partial discharge data acquisition unit consists of a multiplexer with several inputs as per application, signal conditioning, an analogue/digital converter, a digital signal processor converting the PD
impulses to time stamped PD and voltage data.