Patent ID: 8310090

Claim:
A differential-current switch, comprising: a first unit arranged in an electric power supply network for detecting a differential current and outputting an analog differential current signal, a first analog-to-digital converter receiving the outputted analog differential current signal and converting the outputted analog differential current signal to a digital differential current signal, a first digital signal processing unit receiving the digital differential current signal, a second unit for disconnecting break contacts in the electric power supply network, at least one first digital signal processing unit connected upstream of an input of the first analog-to-digital converter and comprising an electronic amplification system with a predetermined first amplification factor, and at least one second digital signal processing unit arranged in parallel with the first digital signal processing unit and connected upstream of an input of a second analog-to-digital converter and having a predetermined second amplification factor different from the predetermined first amplification factor for adjusting the analog differential current signal.