Process and apparatus for insulation testing of insulated electrical conductors, and for measurements of the length of insulation faults

摘要

Such conductors, which form at least one wire, are moved past probes located behind one another which in each case form capacitors with one conductor section as counterpole. According to the invention, one probe is preferred as a result of which, when faults in the insulation move in and out, in each case only short-time flash-overs occur as so-called sparking at the probes not preferred whereas flashovers occur at the preferred probe exactly during the time of passage which precisely corresponds to the length of the insulation fault moving past. In the associated device, there is exactly one measuring electrode (HE) to which at least one shielding electrode (EE, AE) is allocated, the measuring electrode (HE) and the shielding electrodes (EE, AE) forming an electrode system (10) in which the measuring electrode (HE) is geometrically and/or electrically preferred. The measuring electrode (HE) is advantageously arranged between two shielding electrodes (EE, AE). IMAGE