Method and device for surveillance of a sheath voltage arrester of a cable system

摘要

The device has a test signal source (6) for producing a test signal e.g. pulse signal, to be supplied into a measuring loop. A measuring device (7) detects a measuring signal tapped at the loop. The measuring signal is dependent of a frequency-dependent impedance of a sheath voltage arrester (1) for opening a condition of the arrester by evaluating the measuring signal. A sensor (2) e.g. inductive sensor, for tapping the measuring signal at the loop is provided in proximity to the arrester. The sensor is designed such that the test signal is stored in the loop by the sensor. An independent claim is also included for a method for monitoring a sheath voltage arrester of a high voltage cable system.