Terminal block: It is composed of various types of terminals; when the equipment in the screen is connected to the equipment outside the screen and the small bus bar on the top of the screen, it must pass through the terminal block; Row.
General terminal: It is used for connecting the wires at both ends of a circuit, and is the most frequently used terminal;
Connecting terminal: Through the gap in the middle of the upper part of the insulating seat, connect the two terminals together with a conductive sheet, so that various circuits can be paralleled or separated;
Test terminal: it is used to connect to the circuit of current, and it can be connected to the test instrument without loosening the original wiring, so as to ensure that the secondary side will not open circuit during the working process;
Connection type test terminal: it has the function of test terminal and connection terminal at the same time;
Special terminals: used in connection terminals that need to be easily disconnected from the circuit;
There are many types and models of terminal blocks. Among them, the common terminal types are as follows:
1. Plug-in terminal block
It is made of two parts plug-in connection, one part presses the wire tightly, and then plugged into the other part, which is soldered to the PCB board. The bottom mechanical principle and the anti-vibration design ensure the long-term airtight connection of the product and the reliability of the finished product.
2. Barrier terminal
It can realize safe, reliable and effective connection, especially in the environment of high current and high voltage, which is widely used.
3. Spring terminal
It is a new type of terminal using a spring device, which has been widely used in the world's electrical and electronic engineering industries: lighting, elevator control, instrumentation, power supply, chemistry and automotive power, etc.
4. Track terminal
The crimping wire and unique thread self-locking design make the wiring connection reliable and safe. This series of terminal blocks has a beautiful and elegant appearance design, and can be equipped with a variety of accessories, such as short circuit bars, identification strips, baffles, etc.
5. Through-wall terminals
Using screw connection wire technology, the insulating material is PA66 (flame retardant grade: UL94, V-0), and the connector is made of high-quality high-conductivity metal material.
The function, classification and representation of terminals
Arrangement principle of terminal strip
1. The terminals of different installation units should be arranged separately and not mixed together;
2. Terminal blocks are generally arranged vertically, and should be arranged on the side close to the equipment of the installation unit;
3. The terminals of the terminal block of each installation unit should be arranged in a certain order to facilitate the search for terminals. The order of arrangement is: AC current loop; AC voltage loop; signal loop; DC loop; other loops.
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