Circuit arrangement for locating cable fault has Ohmic branch parallel to choke with trigger coil or holding element forming synchronizing signal for defect location device to determine breakdown time

摘要

The circuit arrangement has a generator of pulses reflected from a spark at the fault location produced by an inductance forming a choke at the defect location. A location device is coupled to the cable via an energy isolation filter. A peak current in the choke can be controlled by a synchronizing signal. An Ohmic branch parallel to the choke has a trigger coil or holding element forming a synchronizing signal for the defect location device. The circuit arrangement uses pulses from a generator (1) with a DC source for coupling to the cable whose output pulses are reflected from a spark at the fault location produced by an inductance forming a choke (2) at the defect location. A defect location device is coupled to the cable via an energy isolation filter and a peak current in the choke can be controlled by a synchronizing signal. An Ohmic branch (4) parallel to the choke has a trigger coil (6) or a holding element for forming a synchronizing signal for the defect location device (7) to determine the breakdown time at the defect location.