How To Select Insulation Tension Clamps

The application of power products has a significant impact on social security. Better and safer use of Parallel Groove Clamp has become an issue that we cannot ignore.
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 the tension clamp is clamped on the outer diameter of the "wire" instead of the outer diameter of the "conductor" when it is used, so the model of the tension clamp used should be selected according to the outer diameter of the wire instead of the outer diameter of the conductor. For example, JKLGYJ-150/8 steel core reinforced cross-linked polyethylene insulated overhead cable is used in the power line. It is calculated 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 seen that its conductor outer diameter is 23.1 mm. According to the above table, the tension clamp that should be used is NLL-5. If we select the equipment clamp based on the conductor outer diameter of 15.30mm at this time, then the selected equipment clamp will never 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 wire and the metal after installation, so as to prevent the wire from being damaged by breeze vibration or other wire oscillation conditions and ensure that the gripping force of the tension clamp on the wire is not less than 95% of the wire breaking force.