公开(公告)号：US10295598B2

公开(公告)日：2019-05-21

申请号：US15561478

申请日：2016-03-04

Applicant: ABB Schweiz AG

Inventor： Stefano Magoni ,  Massimo Scarpellini ,  Alessandro Oprandi

IPC: G01R31/34 ,  H02P29/024 ,  H01H71/70

Abstract: A method is provided for determining the operating status of a spring charging motor of a LV or MV switching apparatus. The method includes acquiring a detection signal (ID) indicative of the behavior of a driving current (IMOT); processing the detection signal (ID) to calculate a steady-state detection signal (IDSS) indicative of the behavior of the driving current (IMOT) during a steady-state time interval (TSS); processing the steady-state detection signal (IDSS) to calculate data (DS) indicative of HF and LF spectral components of the driving current (IMOT); processing the data (DS) to calculate first and second harmonic distortion values (THDLF, THDHF); processing the first and second harmonic distortion values to calculate first and second output data (O1, O2), which are indicative of the variations of the first and second harmonic distortion values with respect to corresponding first and second reference values, respectively.

公开(公告)号：US20180059188A1

公开(公告)日：2018-03-01

申请号：US15561478

申请日：2016-03-04

Applicant: ABB Schweiz AG

Inventor： Stefano Magoni ,  Massimo Scarpellini ,  Alessandro Oprandi

IPC: G01R31/34 ,  H02P29/024 ,  H01H71/70

CPC classification number: G01R31/343 ,  H01H71/70 ,  H01H2235/01 ,  H02P29/0241

Abstract: A method for determining the operating status of a spring charging motor of a LV or MV switching apparatus. The method comprise: acquiring a detection signal (ID) indicative of the behavior of a driving current (IMOT), which feeds the spring charging motor during an operation cycle of the spring charging motor; processing the detection signal (ID) to calculate a steady-state detection signal (IDSS) indicative of the behaviour of the driving current (IMOT) during a steady-state time interval (TSS) comprised in the operation cycle of the spring charging motor; processing the steady-state detection signal (IDSS) to calculate data (DS) indicative of HF and LF spectral components of the driving current (IMOT) during the steady-state time interval; processing the data (DS) indicative of the HF and LF spectral components to calculate first and second harmonic distortion values (THDLF, THDHF), which are indicative of the total harmonic distortion of the LF and HF spectral components, respectively; processing the first and second harmonic distortion values to calculate first and second output data (O1, O2), which are indicative of the variations of the first and second harmonic distortion values with respect to corresponding first and second reference values, respectively.