Almost all power systems contain a mix of overhead line and cable. The balance between the two can vary dramatically. A number of factors govern the choice between line and cable: cost, route availability, environmental aspects and electrical parameters. In terms of initial cost including installation, high-voltage cable systems are almost always more costly than overhead line systems for the same duty. Naturally, therefore, the designer's first choice is overhead line. The cable alternative is selected only when there is an overriding reason to do so.
High-voltage cable systems, Page 1 of 2
< Previous page Next page > /docserver/preview/fulltext/books/po/pbpo066e/PBPO066E_ch6-1.gif /docserver/preview/fulltext/books/po/pbpo066e/PBPO066E_ch6-2.gif