简体中文
In the power automation connection system, the emergence of terminal blocks facilitates daily operation and maintenance, with a simple structure and rich variety, providing thousands of solutions for industry partners. When a terminal in the connection experiences a short circuit due to burning, the application advantages of the terminal are immediately apparent. After power outage, the burnt terminal can be immediately removed and replaced with a new product of the same model, greatly reducing the overall maintenance time. As a terminal itself, it mainly includes the following connection technologies:
1. Screw connection
Screw connection is a connection method using screw terminals. Lianjie Electric reminds you to pay attention to the maximum and minimum cross-section of the allowed connecting wires and the maximum tightening torque allowed for screws of different specifications.
2. Welding
The most common type of welding is soldering. The most important aspect of soldering connection is the formation of metal continuity between the solder and the surface to be welded. Therefore, for the wiring terminal control engineering China, all rights reserved. For cold pressed terminals, solderability is crucial. The most common coatings for the welding end of the wiring ring terminal are tin alloy, silver, and gold. The common welding ends of the reed type contact include the welding pad type, the punching welding pad type, and the notch welding pad type: the needle hole type contact has the drilling arc notch type for the common welding ends.
3. Crimping
Crimping is a technique used to compress and displace metal within specified limits and connect wires to contact pairs. A good crimping connection can generate metal mutual fusion flow, causing symmetrical deformation of the wire and contact material. This type of connection is similar to a cold welding connection, which can achieve good mechanical strength and electrical continuity, and can withstand even harsher environmental conditions. At present, it is generally believed that using the correct crimping connection is better than soldering, especially in high current situations where crimping must be used. Special crimping pliers or automatic or semi-automatic crimping machines must be used for crimping. The correct selection of the conductor barrel for the contact pair should be based on the cold pressed terminal control engineering China copyright, the cross-section of the cold pressed terminal wire. It should be noted that crimping connections are permanent and can only be used once.
4. Winding connection
Wrapping is the process of directly wrapping a wire around a contact with edges and corners around a column. When winding, the wire is wound under controlled tension, pressed in and fixed at the edges and corners of the contact wire winding column to form airtight contact. There are several requirements for winding wires: the nominal value of wire diameter should be within the range of 0.25mm~1.0mm; When the diameter of the wire is not greater than 0.5mm, the copyright of the control engineering network is reserved, and the elongation of the conductor material is not less than 15%; When the wire diameter is greater than 0.5mm, the copyright of the control engineering network is reserved, and the elongation of the conductor material is not less than 20%. The tools for winding include a winding gun and a fixed winding machine.
5. Pierce and connect
Piercing connection, also known as insulation displacement connection, is a novel end technology invented by the United States in the 1960s. It has the characteristics of high reliability, low cost, and convenient use. Currently, it has been widely used in various printed circuit board wiring terminals, cold pressed terminals, control engineering in China, cold pressed terminals, and ring terminals. It is suitable for the connection of ribbon cables. When connecting, it is not necessary to peel off the insulation layer of the cable. The tip of the "U" shaped contact spring of the terminal is inserted into the insulation layer, allowing the cable conductor to slide into the groove of the contact spring and be clamped. All rights reserved by the control engineering network, thus forming a tight electrical connection between the cable conductor and the terminal spring. It only requires simple tools, but cables with specified wire specifications must be selected.
