| 摘要 |
<p>An oil-filled, multi-core, electric cable having three cores within a metal sheath. Each core has a conductor surrounded by insulation and has substantially the same outer dimensions as the other cores One conductor is made of copper and has a central oil duct. The other conductors are made of stranded aluminum wires in side-by-side and contacting relation and the ratio of the cross-sectional area of the metal of the copper condoctor to the cross-sectional area of the metal of each aluminum conductor is the reciprocal of the ratio of the electrical conductilities thereof.</p> |
