| 摘要 |
<p>A fibre optic cable (18) is helically wound on to an overhead high voltage conductor (16), and has an electrically non-tracking outer jacket and is filled with protective material, or has a conductive outer jacket. The cable is guided off the conductor inside a conductive housing (2), and thence to earth potential along the inside of a non-tracking shedded or convoluted tube which serves for electrical stress relief.</p> |
