| 摘要 |
In a measuring apparatus for determining the effective value of the power demand of an energy consumer over a period of calculation, a pulse generator 4 associated with a consumption meter 3 produces fixed quantity pulses. A measuring and calculating means 6 forms measurement values which are proportional to the reciprocal of the time intervals between the fixed quantity pulses and which are summed in a summing means 7. An evaluation means 9, which is in communication with the summing means 7 by way of a communication channel 8, forms the effective value Peff from the sum of the measurement values. The measuring and calculating means 6 may comprise a microprocessor.
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