Measuring device and measuring method for measuring an electric current with a rogowski - coil

摘要

The present invention relates to a measuring device for measuring an electric current (i) with a rogowski - coil (2), by means of which an analog coil voltage can be made available, which is proportional to the time derivative of the electric current (i), and with a circuit arrangement (3) for the evaluation of the coil voltage, wherein the circuit arrangement (3) a with the rogowski - coil (2) is connected to the comparator (7) to which a of the coil voltage dependent on the digital signal (10) is generated as well as a corresponding measurement method.