Measuring apparatus

[0029] figure 1 Shown is a measuring device 10 known from the prior art for measuring a current I flowing through a conductor 12 (current measurement). The basis of this known measuring device is a shunt resistor 14 present on a lead 12, the voltage drop across which is measured and transmitted via a differential amplifier 16 to an analog / digital converter 18, from where The coded data of the measured current intensity is transmitted sequentially (for example via the optical waveguide 20 ) to a digital-to-analog converter 22 and from there to a voltage-current transformer 24 . Furthermore, the device 10 comprises an oscillator 26, a voltage regulator 28, a sine wave generator 30 and a rectifier / filter 32 fed by said sine wave generator, said rectifier / filter being used for power supply. The measuring device 10 is divided overall into a first part 34 and a second part 36, wherein the first part 34 functions as a sensor and is spatially allocated to the conductor 12, and the