G.S. 84
XCR(78)129
(a)
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putting Hong Kong on a system which is, overall, the most commonly used one in the world
generally. It prevails in 70 countries including China,
and would have the following specific advantages:
(b)
(c)
(d)
(e)
for the power companies (which, via the "scheme of control" means in the end for consumers generally): they would have either an increase in the capacity of their distribution system or, if they did not use the capacity, a slight reduction in system losses;
for users generally: because of the tolerances within which electrical equipment has to operate (equipment is designed to operate within a tolerance of ± 6% to give a range of 188 to 212 volts in respect of 200 volts and 207 to 233 volts in respect of 220 volts), an increase in the voltage in two stages would mean that existing 200 volt equipment could continue to be used together with 220 volt equipment reasonably satisfactorily while the voltage supply was at 210 volts.
for industrial consumers who do not have a sub-station particularly to supply their requirements: either they will be provided with the voltage for which most of the equip- ment they use was designed (in most countries industrial equipment is manufactured to operate in a range of 380 to 415 volts three- phase) or they will not have to place orders for equipment at 200 volts thus incurring extra expense and time. Those consumers supplied from their own sub-station have already the voltage of their choice and so are affected, in this respect, by neither the present nor the proposed voltage;
for domestic consumers: they will no longer either have to use equipment designed for 220 volts on a 200 volt system with conse quent loss of efficiency (e. g. dimmer lamps, more slowly heating cookers and less efficient motors; from a survey of popular brands of electrical appliance, the Consumer Council has found that only 28% were rated at 200 volts)
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