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A maximum demand indicator records

  • A.the highest average power over a stated interval
  • B.the highest instantaneous power reached at any moment during the period
  • C.the total energy consumed during the period of highest usage
  • D.the power factor at the moment when the demand was greatest

Answer: A

Demand is defined over a block of time, usually fifteen or thirty minutes, because the plant supplying it has thermal inertia. A momentary peak is of no consequence to the supply, so the indicator integrates over the block and retains the largest value reached.

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