The Overhead Line Testing System is an adaptor for the safe operation of Teleflex reflectometers on overhead line systems. Used together with a Teleflex reflectometer, the Overhead Line Testing System can show impedance irregularities in disconnected overhead lines at all voltage levels. These irregularities include short circuits, breaks, and intermediate conditions.
The system is mainly used for checking the overhead lines before they are switched back on, avoiding damage from travelling waves and potentially fatal problems. Regular checks should be performed, particularly to detect any changes in the line. The special design and switch-on system eliminate risks to the operator and damage to the equipment from induced voltages and currents.
The overhead line is tested by means of a switch-on unit and Teleflex reflectometer that are attached to the disconnected line with a resistance wire. During measurement, the switch-on unit safely conducts dangerous, induced energies to earth/ground.