. Electrical news and engineering. has the followingclause, which would seem to adequately cover the entirecorrection of power factor, either for power sold on a maxi-mum demand basis, on a kilowatt hour basis, or on a mixedrate, as follows: If at any time, when the power is being de-livered to the purchaser at normal voltage andfrequency, the total volt-amperes so deliveredexceeds that which would result if the powerwhich the purchaser is then taking hereunderwere delivered at a power factor of 83 per cent.,the volt-amperes delivered shall be calculated aspower upon the basis of 85 per cent,
. Electrical news and engineering. has the followingclause, which would seem to adequately cover the entirecorrection of power factor, either for power sold on a maxi-mum demand basis, on a kilowatt hour basis, or on a mixedrate, as follows: If at any time, when the power is being de-livered to the purchaser at normal voltage andfrequency, the total volt-amperes so deliveredexceeds that which would result if the powerwhich the purchaser is then taking hereunderwere delivered at a power factor of 83 per cent.,the volt-amperes delivered shall be calculated aspower upon the basis of 85 per cent, power in this regard, it should be noted that the determina-tion of power factor, which is to be used as a basis for pen-alty, requires a materially different method of determinationwhen applied to maximum demand power or when appliedto kilowatt hour energy consumption. Some companies have adopted the practice of writinginto their contracts the statement that for billing pur- o 10 eo X) 4-0 .5o 6o ro so 90 lOo,,. poses is to be taken as the kw.: this is applicable to boththe maximum demand method and kilowatt-hour method, of course, is only applicable to special con-tracts, where the rate can be readily changed, , it wouldnot be entirely fair where definite power rates are establish-ed for an entire community unless all contracts are writtento contain the clause. It would, therefore, seem of importance to outline themeans and methods available for the determination of thepower-factor of the consumers loads; in order to properlyapply the penalty in case of low power-factor, which willsooner or later result in the bettering of the consumers lowpower-factor, and in the meantime will allow the powercompany a reasonable return on the line capacity used forthe supply of power to low power-factor loads, which couldotherwise be employed for the supply of new consumers. Methods, 1. The instrument first brought to mind to obtain some J.,1 1. 1018 THF ELE
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