ENG-1968 — Page 253

PUBLIC WORKS AND UTILITIES

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tension employed is 132 kV, and future transmission will be largely at this voltage. The distribution mains are being standardized at 11 kV and, with the conversion from 6.6 kV of the Tsuen Wan and Sha Tin areas completed in 1967, only outlying districts remain at the lower voltage. By September, the main network comprised 479 miles at 33 kV or more, and 671 miles at 11 kV or less.

The electricity supply in Kowloon and the New Territories is 50 cycle alternating current, normally 200 volts single-phase or 346 volts three-phase. For bulk consumers, supply is available at 11 kV and, in some locations, at 6.6 kV.

In the year ending September 30, there were more than 468,000 consumers, 9.4 per cent more than in the previous 12 months. In the same period, 2,718 million kWh were generated, an increase of 13.5 per cent; 2,355 million kWh were sold, comprising 398 million kWh private lighting, 12 million kWh public lighting, 963 million kWh ordinary power, and 982 million kWh industrial bulk power.

The following basic rates per kWh were in force at the end of the year: lighting, 27 cents, less a rebate of 1.6 cents; ordinary power, 13.6 cents; domestic cooking, 11.5 cents. There are special rates for industrial bulk power.

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The Hongkong Electric Company supplies power to Hong Kong Island and the neighbouring islands of Ap Lei Chau and Lamma.

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Electricity is generated by plants at North Point, which has an installed capacity of 345 MW, and at Ap Lei Chau. The first 60 MW generating unit at Ap Lei Chau was brought into operation early in 1968; a second similar unit will be commissioned in early 1969 and further extensions to keep pace with expanding consumer demand are in the planning stage.

Extensions of the transmission system include three 132 kV overhead lines designed to reinforce supplies to the west, north and east of Hong Kong Island. The first line was completed early in 1968 and the second and third lines will be completed by the end of 1968 and early in 1969. As part of development in the city and built-up districts, 132 kV underground cables were laid. Both these lines and cables will operate initially at 66 kV.