| 摘要 |
An antenna for measuring partial discharge of an electric device, when monitoring power equipment insulation or the like, is normally disposed inside the device and sends and receives signals with an external signal processing device via a coaxial cable. Moreover, many electric devices are operated by filling the device interior with air, hydrogen, SF6 gas, or the like and sealing the frame. Therefore, conventionally it could not be easily verified whether the antenna disposed in the device and coaxial cable were correctly connected during operation. In the present invention, determination of whether the connection to the antenna disposed inside the electric device is correct is performed as needed by way of allowing measurement of the combined capacitance of the antenna and coaxial cable inside the device from outside of the device by providing, in the frame of the electric device, a through-hole terminal for connecting coaxial cables inside and outside the device. |
