Patent ID: 9146268
Filing Date: 2015-09-29
Classification: G01R

Abstract:
1. A device for monitoring a sheath voltage arrester of a cable system of an energy supply system, comprising: a verification signal source that produces a verification signal which is to be supplied to a measuring loop which comprises the sheath voltage arrester of the cable system of the energy supply system, and a measuring device that detects a measurement signal which is measured at the measuring loop and which is dependent on a frequency-dependent impedance of the sheath voltage arrester, wherein the measuring device establishes a status of the sheath voltage arrester by evaluating the measurement signal to determine (1) whether the sheath voltage arrester is fully functional, (2) whether the sheath voltage arrester has moved into a conductive state, a conductive channel being produced in the sheath voltage arrestor, and (3) whether the sheath voltage arrester has been destroyed, there being no connection between the sheath of the cable system and a ground potential.