Portion discharge detection antenna

The present invention relates to an antenna for detecting the electromagnetic wave in accordance with the PD for detecting, in particular a partial discharge inside Switchgear according to degraded insulation monitoring system of the power unit. Since the conventional antenna is non-directional antenna is applied, it is difficult to determine an abnormality occurs in the electric equipment of each of the power unit inside the closed switchboard. In the present invention, the reception of electromagnetic waves having directionality (detection) and to enable the angle and rotation adjustment electromagnetic waves detected by an antenna without being limited to the installation location, installation Roasting free to be free, and enables centralized monitoring of the desired power devices and also an object to provide a partial discharge detection antenna of the power unit the measuring range widened to enable the receiving of the broadband radiation. Partial discharge, antennas, electromagnetic detection, electromagnetic antenna reception, switchboard, insulation deterioration