SUPER-TENSION CABLES.

Hauraki Plains Gazette, Volume XXXVII, Issue 4932, 29 January 1926, Page 1

SUPER-TENSION CABLES.

WIDESPREAD DEMAND Underground electric cables to transmit current at pressures of 22,000 volts and upwards have been operated in Great Britain for many years past, though the use of 33,000 volt cables only became common after the termination of the war. Overseas, the transmission of high voltage current underground has been making steady progress, and new developments involving the use of 22,000 volt and 33,000 volt cables are being reported every month. In- Australia the first 33,000 volt underground feeder was laid by Callender’s Cable and Construction Co., Ltd., for the Sydney Municipal Council in 1916. The Sydney Council have recently placed orders for another feeder of this voltage with the same firm, and further schemes in Australia are expected. In New Zealand we hear of schemes involving considerable quantities of super tension cables to work at 22,000 volts, and in India, large quantities of cables to work at the same voltage have been in operation for several years past. The Great Indian Peninsular Railway have recently electrified their suburban services, and the important feeders giving supply from the hydro-electric plant of Messrs Tata’s outside Bombay to the railway are operating at 22,000 volts. The Bombay Baroda and Central Indian Railway have now decided to electrify their suburban systems in a similar way, and here again the feeders supplying cm-rent to the railway will operate at 22,000 volts. The contract for these extensions has recently been placed with Callender’s Cable and Construction Co., Ltd., who had already installed the feeders for the Great Indian Peninsular Railway. Similar schemes are either in being or in contemplation in South Africa and in other countries overseas, and it is evident that the practice of installing what are termed “supertension” cables has become general abroad. —British Commercial News.