What Are The Requirements For Contact Force And Torque Of Cold-pressed Terminals?

The contact force of Cable Lugs is one of the basic information elements. If it is not enough to get enough contact pressure during use, it will be useless to use the best conductive material during management operation. The main reason is that if the contact force is too low, the wire and the conductive sheet will be displaced, which can affect the oxidation environment pollution, increase the contact resistance and cause economic overheating.

The cold terminal only needs 0.8Nm torque on the screw to generate an actual contact force of up to 750N, which is independent of the conductor cross section. Therefore, the connection terminal wire frame has a connection that is not affected by any environment, with a large contact area and a large contact force. Small voltage drop The voltage drop at the contact point is also one of the criteria for determining the quality of the junction box.

During operation, the cold end can apply a small torque, and its voltage drop value is still greater than the required limit value, while the applied torque varies widely and the voltage drop hardly changes. Therefore, although different operators use different torque sizes, it will not affect the quality of the connection.

In this regard, the cold end uses a crimping frame, which is also very reliable. During the process of tightening the screws, the threaded tongue on the crimping frame bounces upward, generating a reaction force on the screws. Because the change in wire diameter caused by temperature is offset by the elasticity of the crimping frame itself, there is no need to tighten the screws again.

The cold-pressed terminal adopts the maintenance-free nature of the crimping frame, and the airtightness of the cold-pressed terminal is affected by various social environmental factors such as temperature and relative humidity of air that act on the terminal for many years. Therefore, the terminal must be able to develop and withstand the test of adverse economic environmental risk factors. According to the experimental research made in accordance with relevant regulations and the actual life experience of the enterprise, it has been proved that even when connecting a soft wire without a crimping terminal, the crimping frame can maintain its airtightness.