美国俄勒冈州电力管理局的一位工程师,改进了现行的线路故障探测仪。经试用表明,仪器测试误差不超过被测线路总长的0.3％。这一装置采用传统的音频通讯信号替代无线电微波信号,价格低廉,且元件可与类似装置互换。该装置还具有其他许多设备所没有的优点。其原理比其他同类装置更简单、更精确。它的同步定时器与通讯系统相联,安装在被测输电线路两端。线路发生故障 An engineer at the Oregon Electricity Authority improved the current line fault detector. After the trial shows that the instrument test error does not exceed the total length of the line being measured 0.3%. This device replaces radio-frequency microwave signals with traditional audio communication signals, is inexpensive and components can be interchanged with similar devices. The device also has advantages that many other devices do not have. The principle is simpler and more accurate than other similar devices. Its synchronous timer is connected to the communication system and installed at both ends of the transmission line under test. The line has failed