Electrical news and engineering . ther measure the demand in watts obtaining the pow-er factor, from the tester who has visited the factory, andwork out the formula as follows,— I Kw. demand reading multiplied by .74ii to convert tohorse power. Then multiply by the allowable power factorover the actual power factor. It will be noted that both these nuiltipliers increase thereadings of the To measure the customer in kilo-volts amperes of demand, cut out the testing on the custom-ers premises, with its uncertainties, and the formula thenbecomes as follows.— 1000 allowable X X
Electrical news and engineering . ther measure the demand in watts obtaining the pow-er factor, from the tester who has visited the factory, andwork out the formula as follows,— I Kw. demand reading multiplied by .74ii to convert tohorse power. Then multiply by the allowable power factorover the actual power factor. It will be noted that both these nuiltipliers increase thereadings of the To measure the customer in kilo-volts amperes of demand, cut out the testing on the custom-ers premises, with its uncertainties, and the formula thenbecomes as follows.— 1000 allowable X X 746 100 It will be noted that in this case that only one of themultipliers increases the readings. The other decreases the results of both formulas are the same, the cus-tomers are not as apt to feel quite so badly dealt with aswhere both multipliers increase the meter reading. An act-ual example of each method shows that the results obtainedare exactily the A customer with lUl kilowatt on his TO WATTMETERB. meter, whose power factor is found to be 50 per cent,tests, would have his bill worked out as follows:-—1000 60 X X :^ 137 746 50 A kilovolt-ampere readiufworked out as follows:11)01) 120 X X 746 oil the same customer would Power Should be Sold on Basis I would at this juncture put in a plea for the sale of pow-er on a kilovolt-ampere basis in place of horsepower plus apower factor penalty. There are no instruments measuringhorsepower. They all measure in watts or fact means that the meter reading must be multipliedby a factor which increases the figure appearing on the power factor penalty means, first, that the power factormust be measured and, secon<lly, that a multiplier has to beused which again increases the reading. By the time one hasfinished with the average layman, he is properly fogged. Iam sure he will go away with the impression that mostelectrical engineers ought to be in jail. Whereas
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