Contact force is one of the basic elements in cold pressed terminals. No matter how good the conductive material is used if there is no enough contact. Because, if the contact force is too low, there will be displacement between the conductor and the conductive sheet, which will produce oxidation pollution, increase the contact resistance and cause overheating.
Therefore, the use of cold pressed terminal wire 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. Even with a small force distance applied to the screw, the value of voltage drop is still much lower than the limit required by vde0611. At the same time, the applied torque varies in a wide 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. This is another proof of the reliability of using crimping frame for terminal blocks. The contact force with great self-locking function is meaningful only if it acts on the conductor for a long time.
The cold pressed terminal adopts crimping wire frame, which also has good reliability in this respect. In the process of tightening the screw, the threaded tongue on the pressure wire frame bounces upward, which produces 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 poor touch of cold pressing terminal is due to the pressure in the external cable. The touch piece should have excellent structure and stable function. Because if the structure of the touch parts is not reasonable, the selection of data is not appropriate, the mold is unstable, and there are errors in processing and so on, so many questions will make the function of cold pressed terminals and wiring terminals become worse in the process of use, and there will be problems of poor touch.
The insulator with poor insulation can make the touch part accurately placed, and make the touch part and the touch piece or the touch piece and the shell be insulated from each other. So the insulating glue should have excellent electrical function. In particular, because of the high density of small terminal blocks used in comparison.