Power cable equipment grading, mainly according to the characteristics of power cable equipment, the power cable equipment will be roughly classified into a class of equipment, two kinds of equipment and class equipment. In the case of many power cable lines and complex types, the insulation level can be considered according to the insulation level of the power cable line, so as to judge the influence of the insulation level of the power cable on the safe operation of the power cable.

(1) the standard and classification of power cable equipment rating. Rating standards are: (1) the specifications can meet the actual operation needs, without overheating; (2) without mechanical damage, the grounding is correct and reliable; (3) the insulation is good and the test meets the requirements; (4) no leakage of oil, leakage of glue, complete element damage of the sleeve of the power cable; 5. The location of the laying way and the intermediate joint are marked, and the phase color and nameplate of the electric power cable head are correctly clear; 3. The technical data are complete and correct; the power cable equipped with oil pressure monitoring and insulation monitoring of the outer protective layer should be correct and good insulation.