| 摘要 |
<p>The invention relates to a combined overhead electrical power and optical transmission system comprising some overhead electrical phase conductors (2) extending between and supported by towers (10), and at least one optical cable (1) that extends between the towers and is supported by them, the optical cable (1) or each optical cable having a resistive element (12) that is removably supported thereby, and which extends from a tower (10) partially along the span of the optical cable (1), the resistive element being earthed through the tower (10), and having a linear conductivity which is significantly greater than the longitudinal conductivity of the cable under dry conditions, such that if a dry band (6) occurs on the cable at the end of the element, the potential difference (Vb') between the ends of the band is insufficient to form an arc, and/or such that the induced current is insufficient to sustain any arc that may occur between the ends of the dry band.</p> |
