Several Wiring Methods of screw, push button Terminal Blocks

Termination method refers to the connection method between the contact pair of the terminal block and the wire or cable. Reasonable selection of termination methods and correct use of termination technology is also an important aspect of using and selecting terminal blocks.
Welding of terminal blocks
The most common form of welding is soldering. The most important thing for a soldering connection is that there should be metallic continuity between the solder material and the surface being soldered. Поэтому, what is important for terminal blocks is solderability. The most common platings on the solder ends of terminal blocks are tin alloy, серебро и золото. Common soldering ends of reed contacts include welding lug type, punched welding lug type and notch welding lug type. Pinhole contacts have drilled arc notches for common welding ends.

Different wiring methods of terminal blocks

Crimping of terminal blocks
Crimping is a technique for compressing and displacing metal within specified limits and connecting conductors to contact pairs. A good crimp connection creates a metal-to-metal flow that causes the wire and contact material to deform symmetrically. This type of connection is similar to a cold welding connection and can achieve better mechanical strength and electrical continuity, и он может выдерживать более суровые условия окружающей среды. It is generally believed that correct crimping connections are 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 when crimping. The conductor barrel of the contact pair should be correctly selected according to the cross section of the cold-pressed terminal wire. It is important to note that crimp connections are permanent connections and can only be used once.

Wrapping of terminal blocks
Wrapping involves wrapping the wire directly around an angled contact wrap post. During winding, проволока наматывается под контролируемым натяжением, вдавливается и фиксируется по углам контактной обмотки для образования герметичного контакта. There are several requirements for wrapping wires: номинальное значение диаметра проволоки должно находиться в диапазоне 0,25–1,0 мм.. Когда диаметр проволоки не превышает 0,5 мм., удлинение материала проводника не менее 15%. Когда диаметр проволоки превышает 0,5 мм., the elongation of the conductor material shall not be less than 20%. Намоточные инструменты включают намоточные пистолеты и машины с фиксированной намоткой..

Terminal strip for plug-in wiring

Piercing connection of terminal blocks
Puncture connection, также известное как соединение со сдвигом изоляции, is a novel end technology invented by the United States in the 1960s. Он имеет характеристики высокой надежности, low cost and easy use, and has been widely used in various printed board terminal blocks. It is suitable for ribbon cable connections. There is no need to strip off the insulation layer of the cable when connecting. The tip of the “U” shaped contact spring of the terminal block is penetrated into the insulation layer. The conductors of the cable slide into the slots of the contact reed and are clamped, thereby forming a tight electrical connection between the cable conductor and the terminal reed. Требуются только простые инструменты, but must use cables with specified wire gauges.

Screw connections for terminal blocks
Винтовое соединение – это метод подключения с использованием винтовых клемм.. Pay attention to the maximum and minimum cross-sections allowed for connecting wires and the maximum tightening torque allowed for screws of different specifications.