| 摘要 |
The present invention relates to a detachable sensor for detecting partial discharge, which is installed in a spacer of a gas insulated switchgear (GIS) and detects partial discharge occurred by an internal defect of the GIS. To this end, the detachable sensor includes a dual pattern antenna detecting an electromagnetic signal in an ultra-high frequency band of the partial discharge occurred in the GIS; a metal case having the dual pattern antenna mounted therein and reducing external noise of the dual pattern antenna; and an insulator formed between the dual pattern antenna and the metal case and adjusting a measurement frequency band. According to the present invention, sensitivity for detecting an electromagnetic wave due to partial discharge can be improved, and accordingly an effect of monitoring a measurement band can be obtained by 70% of the conventional number. |
