Overhead lines mainly refers to the overhead line, erected on the ground above, the insulator is the transmission line will be fixed on the tower on the ground to transmit power transmission lines. Easy installation and maintenance, low cost, but vulnerable to weather and the environment (such as wind, lightning, pollution, snow, etc.) caused by the failure, while occupying the entire power transmission cable corridor more land area, easy to cause electromagnetic interference to the surrounding environment.
Maintenance of overhead lines, usually based on the severity of the problem line, regularly or irregularly.
Maintenance of overhead lines, usually based on the severity of the problem line, regularly or irregularly. Usually have the following items:
(1)wire. Should be cut off the wire reinforcement, replacement of unqualified wire (break more, seriously damaged), unqualified wire connector, replace the loose tie.
(2) adjustment. The loose pull line should be adjusted to adjust the lead line, down the distance between the ground and adjacent components; adjust the wire sag; adjust the tilt pole and cross arm. Rod root to earth, compaction.
(3) pruning and repair. Pruning the branches near the line to clear the pole nest, etc .; repair and replacement of insulation damage to the customer line, cross-arm and so on.
(4) Cleaning and strengthening. Dirt on the insulator to clean, defective poles should be repaired to strengthen it.