公开(公告)号：DE4407870A1

公开(公告)日：1995-09-14

申请号：DE4407870

申请日：1994-03-04

Applicant: FORGENTA FORSCHUNGSTECHNIK UND

Inventor： LEBEK ALEXANDER DR ,  OBST DANKWART DR

IPC: G01R31/327 ,  H02B13/065 ,  G01R31/333

Abstract: The method involves feeding power from a source (1) for the measurement to the unloaded switching chamber (2), e.g. a vacuum switch, over a limited period during mechanical opening or closing. The time variation of the discharge between the switch parts is detected, using a coupled inductor coil (4), by a measurement and storage appts. (6). At least two characteristic parameters extracted from the variation are compared with defined values and parameters derived for evaluation of the functional reliability. The characteristic parameters can be coupled with an additional quality parameter for the evaluation of the functional reliability. The characteristic parameters can be the maximum amplitude and the duration of the discharge.