overhead line hardware,electric power fittings for transmission line
Overhead line hardware is the electric power fittings for transmission line, distribution lines, substation and pole line. On a transmission line, except the power tower, conductor and insulator,electric equipment, all left can be called electric power fittings or overhead hardware.
Without overhead line hardware for transmission lines, the conductor can’t be fixed, normally insulator or high voltage insulator string is connected with many link electric power fittings and then suspend on the wood crossarm or steel crossarm of the towers or poles.
Material of electric power fitting can be metal parts, steel, stainless steel, aluminium alloy, copper. Processing way can be casting, forge, punch. Appearance will be hot dip galvanized according to BS729.
Fig 1 Fig 2 Fig 3
Electric overhead line hardware has a varity of range:
Reference to Fig 1-Strain Clamp-dead end clamp:
Bolted strain clamp and compression strain clamp provide tension strength to the conductor.
Reference to Fig 2-Suspension clamp of overhead line hardware:
Suspension clamp of electric power fittings for transmission lines is used for hanging the conductor to the insulator string.
Reference to Fig 3-Link fitting for power transmission line:
Link fitting of electric power line fittings is used to link suspension clamp or tension clamp to the insulator.
Fig 4 Fig 5 Fig 6
Reference to Fig 4-Splicing fitting of overhead line hardware:
Splicing fitting is used for splicing or repairing of conductor or ground wire of overhead transmission lines, including splicing sleeve, repair sleeve, parallel groove clamp.
Reference to Fig 5-Protection fitting:
Protection fitting is used to restrain vibration of the conductor and ground wire of overhead transmission lines, including electric power fitting of vibration damper, preformed armour rod.
Reference to Fig 6-Guy Wire Fittings:
Guy wire fitting or the stay assembly is used to connect guy wire of tower mostly dead end tower and angle tower, and connect the ground fitting to the ground.