PUBLIC WORKS AND UTILITIES
213
be limited to a fixed sum per unit sold. The whole question was under consideration at the end of the year.
Generation and distribution of electricity on the Island is carried out by the Hong Kong Electric Co Ltd. The main and secondary transmission voltages are 22 kV and 6.6 kV phase 50 cycles, alternating current, but there are plans to raise these voltages to 33 kV and 11 kV. Bulk supply consumers are supplied at 6.6 kV, industrial consumers at 346 volts 3 phase and domestic consumers at 200 volts single phase.
The amount of electricity generated in 1960 was 466,138,390 kilowatt hours, an increase of 12.1% over the previous year, and the number of consumers at the end of the year was 98,753, an increase of 7.4%. The total sales of electricity for 1960 were as follows:
}
Lighting
Public Lighting
Bulk Power
Domestic & Commercial Power
113,475,686 kWh
3,813,540 76,515,222
208,895,238
29
"
59
402,699,686 kWh
During the year the maximum demand on the generating station increased by 21.5% to 103.3 MW, whilst the maximum units sent out by the station in one day increased by 28.1% to 1,692,250 units. The steam-raising capacity is now 1,981 klbs/hr and the generating capacity 170 MW, these increased capacities being the result of commissioning additional plant in 'B' Station.
The annual maximum load on the system now occurs during the early afternoon in summer instead of the late afternoon in winter. This has been brought about by the heavy air-conditioning load which has developed in the city and suburban areas during the past few years.
A new major substation was established in 1960 at Wong Nai Chung Gap with an initial capacity of 15 MVA (ultimately to rise to 80 MVA). Constructional work on Hospital Road 'B' Substation has begun, and plans have been made for three additional major substations to be built and commissioned within three years. 24 smaller substations and 5 transformer kiosks were also commis-
sioned in 1960.