Patent ID: 11965916
Assignee: SAFETYTEST GMBH
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 8:
9. A device adapted for determining the resistive component of the leakage current impedance (R) of a downstream branch to an alternating current network having a phase (L), a neutral conductor (N), and a protective conductor (PE) by a method according to claim 1, comprising:
a voltage sensor adapted for measuring by scanning a voltage (U) between the phase (L) and the neutral conductor (N), or between the phase (L) and the protective conductor (PE),
a differential current sensor adapted for measuring by scanning a differential current ILN between the phase (L) and the neutral conductor (N), and
an evaluation unit adapted for correcting a phase shift between the differential current ILN and the voltage (U), adapted for determining several individual differential current values ILN,i and several individual voltage values Ui, wherein the differential current values ILN,i are phase-corrected with respect to the voltage values Ui, adapted for determining the effective power P from the several individual differential current values ILN,i and the several individual voltage values Ui, adapted for determining the effective voltage UEff by the voltage values Ui, and adapted for determining the resistive component of the leakage current impedance (Ri50) by the effective voltage UEff and the effective power P.