A Brief Analysis Of The Connection Methods Of Pre-insulated Sleeves.
In power automation connection systems, the use of terminals insulated joint sleeve facilitates daily operation and maintenance. They have a simple structure and a wide variety of types, providing thousands of solutions for industry partners. When a terminal in a connection short-circuits due to burnout, the advantages of using terminals become immediately apparent. After power is cut off, the burnt-out terminal can be immediately removed and replaced with a new product of the same model, significantly shortening the repair time. As for the terminals themselves, they mainly involve the following connection technologies:
1. Screw Connection
Screw connection uses a screw-type pre insulated sleeve connection method. Attention should be paid to the maximum and minimum cross-sections of the allowable connecting wires and the maximum tightening torque allowed for different specifications of screws.
2. Soldering
The most common type of soldering is tin soldering. The most important aspect of tin soldering is that a continuous metallic connection should be formed between the solder and the surface being soldered. For crimp terminals, solderability is crucial. The most common plating for the soldering end of wiring ring terminals is tin alloy, silver, and gold. Common soldering ends for spring-type contact pairs include solder tab type, punched solder tab type, and notched solder tab type; common soldering ends for pin-hole type contact pairs include drilled circular arc notch type.
3. Crimping
Crimping is a technique used to compress and displace metal within specified limits and connect the wire to the contact pair. A good crimp connection produces metal interflow, causing symmetrical deformation of the wire and contact pair materials. This connection is similar to cold welding and provides good mechanical strength and electrical continuity, allowing it to withstand harsher environmental conditions. It is generally believed that using the correct crimp connection is better than tin soldering, especially in high-current applications where crimping is mandatory. Special crimping pliers or automatic/semi-automatic crimping machines should be used for crimping. The correct wire barrel of the contact pair should be selected based on the cross-section of the crimp terminal wire (CONTROLENGINEERINGChina Copyright). It should be noted that crimp connections are permanent connections and can only be used once. 4. Wire Wrapping
Wire wrapping involves directly winding a wire around the sharp edges of a contact post. During wire wrapping, the wire is wound under controlled tension, pressed into and secured at the edges of the contact post to form an airtight connection. Several requirements apply to the wire used for wrapping: the nominal wire diameter should be within the range of 0.25mm to 1.0mm; when the wire diameter is not greater than 0.5mm, the elongation of the conductor material should be no less than 15%; when the wire diameter is greater than 0.5mm, the elongation of the conductor material should be no less than 20%. Tools for wire wrapping include wrapping guns and fixed wire wrapping machines.
5. Piercing Connection
Piercing connection, also known as insulation displacement connection, is a novel termination technology invented in the United States in the 1960s. It features high reliability, low cost, and ease of use, and is currently widely used in various pre insulated junction sleeve printed circuit boards.
