Partial discharge detection in Transformer, Switchgear, Cables, GIS provides an indication of localized points of degradation in the insulation system. Detecting these weak points is of interest for condition based maintenance, asset replacement programs and improving overall network reliability. With on-line PD detection, tests can be done under normal working conditions with equipment in-service. Continuous monitoring can also be achieved in which measurements are made over an extended period. This Equipment can be also use for PD measurement in Ultra-High Frequency Bandwidth upto 3.0 GHz.