What is the function of torque nut in insulation puncture connector?

When two wires are spliced, with the tightening of the nut, the needle of the insulation puncture connector passes through the insulation layer of the wires and touches the metal body of the wires, and its needle will deform and become dull, and the resistance will increase. When the designed preset value is reached, the torque nut of the outer layer will be disconnected. When removing the insulation puncture connector, use the torque nut on the inner layer. If it is reused for the second time, it is impossible to ensure that the two conductors are in close contact. Because the insulated conductor is struck by lightning, it is difficult to discharge lightning current, which is easy to cause disconnection. Therefore, when the line is in the fifth gear or above, lightning arresters should be installed at the head end, end and middle of the line. It is difficult to hang temporary working grounding wire in line maintenance. In order to facilitate the safety technical measures in line maintenance, it is necessary to pre-install the puncture grounding ring in the appropriate position.