Method of contactless capacitive monitoring of insulated electrical conductor potential enables simple, reliable potential measurement without contact

摘要

The method involves applying at least one measurement electrode (31) to the insulation (51) in shape- and force-locking manner under a defined pressure, forming a measurement capacitance (30) between the conductor (50) and electrode(s); setting the insulation into mechanical vibration at a certain auxiliary frequency so that the measurement capacitance varies; and detecting and evaluating a measurement signal (I1) dependent on the varying measurement capacitance and conductor potential (U0).