What is the selection of the line clamp

Time：2015-8-22 18:11:02  From：Tengda electric power equipment

The selection of the tension line clip is mainly determined by the different conditions of the wire. There are two common situations.

1, when the use of LJ, LGJ wire line resistance to the selection of line clip

When using the LGJ or LJ lead, because the wire is used when the wire is clamped on the outer diameter of the wire, it should be based on the diameter of the wire to select the use of the wire clamp type. In power line, the LGJ-185/30 lead is used to calculate the diameter of 18.88mm, which is known to be NLL-4, NLL-5 or NLD-4.

This should be paid attention to is LGJ wire diameter is by the aluminum section 185mm with steel core section 30mm and calculated the conductor diameter, not only is calculated by the aluminum section 185mm. The same size of the LGJ wire has different steel core section and wire diameter, so the same size of the LGJ wire used in line clamp is not necessarily the same. If the LJ lead, because it has no steel core, can be used to calculate the diameter of the wire with aluminum wire.

Also because the wire clamp is clamped on the outer diameter of the wire, we are required in the construction of the outer layer of the LGJ or LJ wire to prevent the pressure from the wire.

2, when the use of insulated wire line resistance to the selection of line clip

Compared with the bare wire insulated wire has high safety and reliability, reduce the loss, the advantages of small wire corrosion etc.. When using an insulated wire, we need to pay attention to the use of the wire is sandwiched in the outer diameter of the wire, rather than on the outer diameter of the conductor, it is based on the diameter of the wire instead of the outer diameter of the conductor to select the use of line clip.

Also we in mounting strain clamps should be uniform and tighten the screws, requirements after the installation of the conducting wire and metal in the original contact surface, does not appear wire stress increase the phenomenon, to prevent the breeze vibration or other conductor oscillation caused by damage to the conductor and ensure the tension clamps the wire grip strength is not less than 95% of wire tensile force.

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