The grounding mode of metal sheath of high voltage power cable is in troduced in this paper.

The earthing method of the metal sheath varies somewhat in different cable lengths,which affects greatly line parameters,especially zero sequence impedance.

Aiming at typical cross connection faults of metallic sheath of 110 kV XLPE power cable in operating site,the magnitude of inductive potential and current throughmetallic sheath at different cross connecting models were analyzed and discussed by Vector Analysis Methode in this paper.

The paper compared the cable arrangement and grounding mode of metallic sheath from induction voltage, cable tosses and cable current - carrying capacity, through the research and analysis for the Guangzho.

According to the high current in the overhead contact line system (OCS) in the high speed railway lines, the induced voltage in metallic sheath of the single conductor cable was calculated with the effect of electric loops along the electrified railways taken into consideration.

Influence of metal casing on electromagnetic logging response;

The present situation of research on cross hole electromagnetic imaging technique at home and abroad is introduced systematically, including sensitivity analysis and scope of application of the imaging system, resolution of imaging methods, research on field operation and instrument, influence of metal casing.