Apparatus and method for the purpose of acquiring load data from current pick-offs (current collectors, moving contacts) with the aid of a microprocessor having an integrated multifunction display, cos (y) detection and maximum load monitoring, and a residual current device (fault-current protection circuit breaker)

摘要

The invention describes an apparatus and a method which has integrated the following functions in one apparatus, with the aid of modern microelectronic circuits: 1. Detection of the electrical work (kWh meter) 2. Detection of the power which is consumed simultaneously by all three phases (kW) 3. Calculation and display of the phase angle error cos (y) 4. Detection and display of the reactive-current consumption 5. Output of an adjusting signal from 0 to 1 volt, corresponding to cos (y) 6. Maximum load monitoring having a multiplicity of channels which are cut off as a function of the load 7. Integrated residual current device circuit.