Since the invention of terminal block, it has been widely used in the connection field of inverter, controller and other industries. In view of the diversity of terminal types and the universality of applicable fields, there is no specific parameter standard for the torque of the screw when installing and using Terminals, so users need to decide according to the specific situation.https://www.bossgoo.com/product-detail/insuated-ring-copper-terminals-and-connectors-61372253.html

Installation torque of wiring terminals is mainly reflected in plug and plug wiring terminals and fence wiring terminals with screw components. Usually, the maximum locking torque is found in the parameters of wiring terminals, but many customers do not understand the meaning of this item. For example, in LC17-5.08, the maximum locking torque related to screws is 0.5-0.6nm, and the screw specifications are M3. The maximum locking torque is actually the torque, indicating that the screw with M3 specifications can be locked by applying 5-6 n force when it is applied to the place 0.1 meters away from the terminal. Too much force may lead to sliding wire, insufficient force may loose in the process of use.
In THE UK series terminal block there is a clear provision of its terminal must meet the torque requirements, in this range of torque will not damage the product and make the normal use of the product, we take UL-UK2.5B terminal block as an example, in the international terminal industry IEC60947-1 standard, it clearly stipulates that the copper requirements of the product must meet the torque 0.8N, Therefore, we can use this as the standard in the use of the product and take 0.8N torque, so as to ensure a low loss rate of the product in practical use.

In addition to screws, the force control in the terminal also includes the force requirement for the use of plastic parts. The main function of the plastic part is to clamp on the guide rail to fix the terminal itself. However, due to the cold climate in winter and the decline of air humidity lead to the lack of toughness of the product, so we should pay special attention to this link in use. In use, we should slowly increase the pressure and stop exerting force after hearing the sound of "snap", so as to ensure the normal use of the product.