po wer factor
leaves the equipment on for the whole year or just for the one hour
the amount of plant involved is the same and the charge is the same.
There would of course be a difference in the energy or running
charge between the two cases.
When the Area Boards purchase energy from the Generating
Board or industrial consumers from the Area Boards the amount of
plant involved is determined by measuring maximum demand. This
may be on a kW or kVA basis. In the former case a kilowatt-hour
meter has its advance measured during each half hour of the year.