US 11,698,392 B2
Low-voltage power switch and arc fault detection unit
Joerg Meyer, Dresden (DE); Peter Schegner, Dresden (DE); and Karsten Wenzlaff, Dresden (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Filed by Siemens Aktiengesellschaft, Munich (DE)
Filed on May 27, 2022, as Appl. No. 17/826,750.
Application 17/826,750 is a continuation of application No. 17/276,854, granted, now 11,372,027, previously published as PCT/EP2018/076271, filed on Sep. 27, 2018.
Prior Publication US 2022/0291259 A1, Sep. 15, 2022
Int. Cl. G01R 15/18 (2006.01); H02H 1/00 (2006.01)
CPC G01R 15/181 (2013.01) [H02H 1/0015 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An arrangement for a low-voltage AC circuit, comprising:
at least one Rogowski coil configured to ascertain an electrical current level of a conductor of the low-voltage AC circuit, the at least one Rogowski coil configured to output an analog voltage that is related to the electrical current level of the conductor,
wherein the at least one Rogowski coil is connected to an analog integrator that is followed by an analog-digital converter that converts an output signal of the analog integrator into a digital signal that is processed further by a microprocessor in such a way that a phase shift generated by at least one of (1) the at least one Rogowski coil, (2) the analog integrator, or (3) the analog-digital converter is compensated for, such that correct-phase current values are ascertained.