Causes of Power Cable Faults and Test Method Study

Power cable faults will have serious impacts on operation reliability of power grid.Analysis was made to typical power cable fault types,forming causes and test methods for various faults.The results show that the main causes leading to cable faults are mechanical damages,overload operation,cable end defect etc.In cable fault test,the reasonable fault test method should be selected according to fault types and nature.In order to prevent cable faults from taking place and to raise reliability of cable operation,cable load currents and cable temperature should be monitored on line so as to prevent from cable chemical corrosion and electrolysis corrosion.