Selection Of Bolt-type Tension Clamps For Lines Using Lgj And Lj Conductors

For example, LGJ-185/30 conductor is used in power lines. After calculation, it can be known that its outer diameter is 18.88mm. From the above table, it can be known that the bolted type strain clamp that should be used is NLL-4, NLL-5 or NLD-4.

It should be noted that the outer diameter of the LGJ conductor is calculated by adding the aluminum wire cross section of 185mm and the steel core cross section of 30mm, not simply by the aluminum wire cross section of 185mm. LGJ conductors of the same specification have different steel core cross sections and conductor outer diameters, so the dead end strain clamp used by LGJ conductors of the same specification are not necessarily the same. If it is an LJ conductor, since it has no steel core, the cross section of the aluminum stranded wire can be used to calculate the outer diameter of the conductor.

In addition, since bolted dead end clamp is clamped on the outer diameter of the conductor, we require the outer layer of the LGJ or LJ conductor to be wrapped with aluminum tape during construction to prevent damage to the conductor during crimping.