Operation and maintenance of the hottest overhead

The operation and maintenance of overhead lines and cable lines

the purpose of patrol inspection is to master the operation of line equipment and the surrounding environment, timely find line faults, eliminate faults, and ensure safe operation

the types of line operation inspection are as follows:

(1) regular inspection. Generally, once a month in urban areas, up to 24999.24 yuan/ton, at least once a quarter in suburban and rural areas. Carefully check the operation status of line equipment and the environmental changes of 180 ° mode along the line

(2) special inspection. In case of abnormal climate change or some special circumstances, the whole line or some sections of the line or some protective devices shall be inspected

(3) patrol at night. Check whether the line contact is heated and ignited, and whether the insulator is discharged. Usually at least once a year, when there is no moonlight

(4) fault inspection. In case of line failure, immediately find out the location and cause of the failure, eliminate the failure and restore the power supply as soon as possible

the contents of inspection generally include:

(1) whether the tower foundation sinks and tilts, and whether the concrete rod has cracks, looseness and fracture; Whether the protective facilities are damaged or collapsed; Whether there are branches, vines and other plants endangering the safety of the line

(2) whether the cross arm and fittings are rusted, skewed and deformed, whether the bolts are fastened, and whether the nuts and cotter pins fall off

(3) whether the insulator has flashover trace or damage

(4) whether the conductor is broken; Whether it is too tight or loose, and whether the three-phase sag is balanced; Whether there are sundries on the conductor and whether the conductor joint is burnt; Whether the binding wire between conductor and insulator is loose or not will affect the test results

(5) check whether the stay wire is loose, broken and rusted

(6) whether the grounding wire falls off or is overheated and burned; Whether the grounding body is exposed, severely corroded, etc

(7) whether the arrester is fixed firmly and whether the surface is dirty; Whether there are cracks, damages and flashover marks on the surface; Protect whether the gap is rusted. The central console controls the action of each unit to complete the object short-circuit by the tensile test of other test pieces. Whether the distance of the gap meets the requirements