| 摘要 |
An inexpensive and compact overhead electric conductor incorporating an optical fibre, especially suitable for use as an overhead earth conductor, has a circumferentially rigid and continuous central core 3 comprising a layer of bare metal elements 4 each having a transverse cross-section approximating to a sector of an annulus or having a transverse cross-section of such a shape that, when the conductor is in tension, the element is in inter-facial engagement with adjacent elements. The central core 3 has a bore 2 in which an optical flbre 1 is loosely housed and the central core is surrounded by a circumferentially continuous stabilising layer 8 in the form of a seamless aluminum tube or a single aluminium extrudate of C-shaped transverse cross-section whose limbs have been closed together. To reduce vibration, the outer surface of the stabilising layer may be longitudinally ribbed or grooved or may be surrounded by a layer of helically wound aluminium wires. |
