| 摘要 |
A partial discharge detector of a gas-insulated apparatus is provided to obtain equal sensitivity characteristics by preventing the change of impedance regardless of being attached to any apparatus. An antenna device part(101) has two pieces of conductive electrodes with a gap in a metal vessel. A coaxial balun(105) surrounds a signal line and a ground termination line connected to each conductive electrode of the antenna device part. A coaxial cable(108) outputs a signal generated in the metal vessel to the outside through the signal line connected to the antenna device part. A measurement device(109) measures a signal transmitted from the signal line as being connected to the coaxial cable. A termination load(110) having the same impedance as the impedance of the coaxial cable connected to the signal line is connected to the ground termination line. |
