Current detection system for measuring alternating currents with multiple output signals when using only one sensor in electrical power supply systems, comprising ∘ an external Rogowski coil, which emits a voltage signal (Um) on the output side, which represents the induction voltage to the alternating current, which flows in a conductor through the Rogowski coil of the system, whereby the voltage signal (Um) represents the proportional, mathematical first derivative of the alternating current, ∘ a converter unit which is designed to convert the analogue voltage signal (Um) into a digital signal (Sr), hereinafter referred to as signal,wherein a frequency range with the lower frequency limit (Fu) and the upper frequency limit (Fo) is filtered from the signal (Sr), wherein the signal is scaled with an adjustable linear amplification factor, ∘ a Rogowski integrator which is designed to integrate the signal (Sr), the output signal of which represents the integration of the voltage (Um), the output signal of the integrator (Sr) being proportional to the alternating current, ∘ a multiplication unit which is designed to multiply the output signal of the integrator into two equal signals and, ∘ a first scaling unit which is designed to multiply the first output signal of the multiplication unit by an amplification factor, the output signal being proportional to the first output signal of the multiplication unit and the proportionality factor also changing proportionally with the change in the amplification factor, ∘ a second scaling unit which is designed to multiply the second output signal of the multiplication unit by an amplification factor, the output signal being proportional to the second output signal of the multiplication unit and the proportionality factor also changing proportionally with the change in the amplification factor, ∘ a first conversion unit which is designed to convert the output signal of the first scaling unit into a proportional alternating current, wherein this is designed so that the alternating current is impressed into the output side up to a predeterminable maximum power output, ∘ a second conversion unit, which is designed to convert the output signal of the second scaling unit into a proportional alternating current, wherein this is designed so that the alternating current is impressed into the output side up to a pre - determinable maximum power output. ∘ an external Rogowski coil, which emits a voltage signal (Um) on the output side, which represents the induction voltage to the alternating current, which flows in a conductor through the Rogowski coil of the system, whereby the voltage signal (Um) represents the proportional, mathematical first derivative of the alternating current, ∘ a converter unit which is designed to convert the analogue voltage signal (Um) into a digital signal (Sr), hereinafter referred to as signal,wherein a frequency range with the lower frequency limit (Fu) and the upper frequency limit (Fo) is filtered from the signal (Sr), wherein the signal is scaled with an adjustable linear amplification factor, ∘ a Rogowski integrator which is designed to integrate the signal (Sr), the output signal of which represents the integration of the voltage (Um), the output signal of the integrator (Sr) being proportional to the alternating current, ∘ a multiplication unit which is designed to multiply the output signal of the integrator into two equal signals and, ∘ a first scaling unit which is designed to multiply the first output signal of the multiplication unit by an amplification factor, the output signal being proportional to the first output signal of the multiplication unit and the proportionality factor also changing proportionally with the change in the amplification factor, ∘ a second scaling unit which is designed to multiply the second output signal of the multiplication unit by an amplification factor, the output signal being proportional to the second output signal of the multiplication unit and the proportionality factor also changing proportionally with the change in the amplification factor, ∘ a first conversion unit which is designed to convert the output signal of the first scaling unit into a proportional alternating current, wherein this is designed so that the alternating current is impressed into the output side up to a predeterminable maximum power output, ∘ a second conversion unit, which is designed to convert the output signal of the second scaling unit into a proportional alternating current, wherein this is designed so that the alternating current is impressed into the output side up to a pre - determinable maximum power output.