Journal article Open Access

Measuring Cable Sheath Currents to Detect Defects in Cable Sheath Connections

Marina Adel

This paper presents a method for detecting different types of defects in the cable sheaths interconnected in a cross bonding configuration of a HV cable system installed in flat or trefoil layout using the sheath currents as input data. Three different defects have been analyzed: electric continuity loss of earth connection, short-circuit between sectionalized metal sheaths of a cable joint and link-box flooding. The sheath current has been calculated by two different approaches, one on the basis of theoretical equations, programed in MATLAB® and the other on the basis of ATP software simulating the cable system model. The results obtained using both methods have achieved a good agreement between them. A simple criterion by the means of a easy normalized code of four discrete levels 0, 1, 2 and 3 has been developed to distinguish the magnitude level of change of sheath currents in case of the indicated defect existence in  order to trigger alarm.

Files (496.3 kB)
Name Size
Upec 2017-fgv-10-fgv 13 julio.docx
496.3 kB Download
All versions This version
Views 1212
Downloads 11
Data volume 496.3 kB496.3 kB
Unique views 88
Unique downloads 11


Cite as