| 摘要 |
A combined overhead electrical power and optical transmission system which comprises overhead electrical phase conductors extending between and supported by, towers (10), and at least one optical cable (1) that extends between and is supported by, the towers, the or each optical cable having a resistive element (12) that is removably supported thereby and which extends from a tower (10) where it is earthed part of the way along the span of the optical cable, the resistive element having a length and conductivity such that if a dry band occurs on the mostly wet cable at the end of the element, the potential difference (Vb') across the band is insufficient to form an arc, and/or such that the induced current is insufficient to sustain any arc that may occur across the dry band. <IMAGE> |
