Selection Of Suspension Clamps When Using Insulated Conductors

In densely populated, tree-filled, and polluted areas, we are increasingly using insulated wires to replace bare wires. Compared with bare wires, it has the advantages of high safety and reliability, reduced line loss, and less wire corrosion. When using insulated wires, we need to pay attention to the fact that since the aerial cable suspension clamps is clamped on the outer diameter of the "wire" rather than the outer diameter of the "conductor" when used, the angle suspension clamp model should be selected based on the outer diameter of the wire rather than the outer diameter of the conductor. For example, in the power line, the JKLGYJ-150/8 steel core reinforced cross-linked polyethylene insulated overhead cable is used. After calculation, it is known that its conductor outer diameter is 15.30mm, plus its insulation thickness of 3.4mm and conductor shielding thickness of 0.5mm, it can be known that its conductor outer diameter is 23.1 mm. According to the above table, the harga suspension clamp should be NLL-5. If we choose messenger suspension clamp based on the conductor outer diameter of 15.30mm, then the selected suspension clamp with i hook cannot be used. In addition, we must tighten the screws evenly when installing the tension clamp, and require that there is no increase in the stress of the wire at the contact surface between the installed wire and the original metal, so as to prevent the wire from being damaged by breeze vibration or other wire oscillation and ensure that the gripping force of the tension clamp on the wire is not less than 95% of the wire breaking force.