The contact force of cold pressing terminal is one of the basic elements. If there is not enough contact pressure when using, it is useless to use the best conductive material in operation. The main reason is that if the contact force is too low, the displacement between the conductor and the conductive sheet will occur, which will produce oxidation pollution, increase the contact resistance and lead to overheating.
The actual contact force of 750N can be produced by only applying 0.8nm torque to the screw, and the force has nothing to do with the conductor section. Therefore, the use of terminal crimping frame has a large contact area, large contact force connection, which is not affected by any environment. The voltage drop of the contact point is also one of the criteria to identify the quality of the terminal block.
During operation, the cold pressed terminal can apply a small torque, and its voltage drop is still greater than the required limit during operation. At the same time, the applied torque varies in a large range, and the voltage drop is almost unchanged. Therefore, although the torque used by different operators is different, the connection quality will not be affected.
The cold pressing terminal adopts the crimping wire frame, which also has greater reliability in this respect. In the process of tightening the screw, the threaded tongue on the crimping wire frame bounces upward, thus producing a reaction force on the screw. Since the change of wire diameter caused by temperature is offset by the elastic effect of the wire frame itself, it is unnecessary to tighten the screw again.
The cold pressed terminal adopts crimping wire frame, which is maintenance free. Air tightness a variety of environmental factors, such as temperature, air humidity and so on, act on the terminal block for a long time. Therefore, the terminal must be able to withstand the test of adverse environmental factors. According to the specified tests and practical experience, the crimping frame can maintain its air tightness even when the soft conductor without crimping terminal is connected.