Electronic peak demand monitoring device - continuously compares demand over fixed test periods, and signals load reduction

摘要

The apparatus comprises at least one reversible counter resettable at constant test periods and test pulses and pulses from a clock pulse generator are applied to its separate inputs; each counter is connected to a logic stage which makes operative a signalling device allocated to each counter, when the specified pulse number is exceeded by test pulses; the signalling device is controlled by a frequency generator whose output frequency varies with the size of the excess demand; The outputs of the counters are connected to decadally graded AND stages which make partly operative a series of resistors connected to the frequency generator.