Terminal installation torque introduction

Terminal block since its inception, in the inverter, controller and other industries have been widely used in the field of connection. In view of the diversity of terminal types and the wide range of application fields, there is no specific parameter standard for the torque of the screw when the terminal is installed and used, which needs to be determined by the user.

Installation of the terminal torque is mainly reflected in the plug-in terminals with screw parts and fence terminals, usually in the terminal parameters to find the maximum locking torque, many customers do not understand the meaning of this one. For example, LC17-5.08, with the maximum torque locking screw: 0.5-0 .6 Nm, M3 screw two specifications, the maximum torque is actually the locking torque, said M3 specifications of the screw, acting on the terminal 0.1 meters Need to apply 5-6 cattle force will be able to lock the screw. Excessive force may lead to slippery wire, lack of force may be used in the process of loosening.

UK series terminals have clearly defined the torque must meet the requirements of the terminal, in this range of torque will not damage the product and the normal use of the product, we UL-UK2.5B terminals, for example, the international terminals Industry IEC60947-1 standard, its requirements on the copper parts of the product clearly stipulates that the torque must meet the 0.8N, so we can use this as a standard in the product, to take 0.8N torque, so that in practice can guarantee Low loss rate of the product.

In addition to the screws, the control of forces in the terminals also includes the requirements for the strength of the plastic part. The plastic part of the main function is the card to the rail, to fix the terminal itself. However, due to the cold weather in winter and the drop in air humidity leading to the lack of product toughness, so in use we should pay special attention to this aspect, in use we should slowly increase the pressure, hear the "snap" after stop hard, so you can To ensure the normal use of the product.