UHF Partial Discharge Monitoring System
The UHF PDM System is the third generation, spanning 20 years of monitoring systems developed for GIS partial discharge monitoring. It utilises well-proven technology from the former systems, however the data acquisition system has been modified to conform to the single platform approach as used for GDM and CBM systems. The IEC requirement for High Voltage on-site testing using partial discharge monitoring can be met by this system where an online solution is required.
The system is modular and designed to facilitate measurements using internal or external UHF sensors. In order to simplify the signal cabling, a Node Unit Cubicle containing the monitoring equipment is located in the GIS switchgear hall where the signals for each CB bay can be concentrated. This wall mount Node Unit Cubicle also allows for a very simple communications connection to transmit all of the bay data along a single fibre cable.
