简体中文
Terminal blocks are used to facilitate the connection of wires. They are actually a piece of metal enclosed in insulating plastic, with holes at both ends for inserting wires and screws for fastening or loosening. For example, two wires sometimes need to be connected and sometimes need to be disconnected. In this case, terminals can be used to connect them and can be disconnected at any time without the need to weld or wrap them together, It's very convenient and fast. Moreover, it is suitable for the interconnection of a large number of wires. In the power industry, there are specialized terminal blocks, terminal boxes, all of which are wiring terminals, single layer, double layer, current, voltage, ordinary, interruptible, and so on. A certain crimping area is used to ensure reliable contact and sufficient current flow.
classification
Terminal blocks can be divided into WUK terminal blocks, European terminal block series, plug-in terminal block series, transformer terminal block, building terminal block, fence terminal block series, spring terminal block series, track terminal block series, through wall terminal block series, optoelectronic coupling terminal block series, 110 terminal block, 205 terminal block, 250 terminal block, 187 terminal block, OD2.2 ring terminal block, 2.5 ring terminal block 3.2 ring terminals, 4.2 ring terminals, 2 ring terminals, 6.4 ring terminals, 8.4 ring terminals, 11 ring terminals, 13 ring terminal flag series terminals and sheath series, various ring terminals, tubular terminals, wiring terminals, copper strip iron strips (2-03, 4-03, 4-04, 6-03, 6-04), etc.
Pluggable
It is composed of two parts that are plugged and connected, with one part compressing the wire and then inserting it into the other part, which is welded to the PCB board. The bottom mechanical principle of this connection ensures the long-term airtight connection of the product and the reliability of the finished product through this anti vibration design. Both ends of the socket can be equipped with mounting ears, which can greatly protect the connectors and prevent poor placement of the connectors. At the same time, this socket design ensures that the socket can be correctly inserted into the mother body. Sockets can also have assembly and locking buckles. The assembly buckle can be more firmly fixed to the PCB board, and the locking buckle can lock the mother body and socket after installation is completed. Various socket designs can be paired with different insertion methods for different matrices, such as horizontal, vertical, or inclined printed circuit boards. Different methods can be selected according to customer requirements. Both metric and standard wire gauges can be chosen, making it the most popular terminal type on the market.
Fence type
It is able to achieve safe, reliable, and effective connections, especially in environments with high currents and voltages, which are widely used.
Spring type
It is a new type of wiring terminal that utilizes spring based devices and has been widely used in the world's electrical and electronic engineering industries: lighting, elevator lift control, instrumentation, power supply, chemistry, and automotive power.
Track installation
It adopts reliable threaded connection technology, electronic capacitance technology, and the latest electrical connection technology, widely used in fields such as power electronics, communication, electrical control, and power supply.
Track type
The use of crimping and unique thread self-locking design ensures reliable and safe wiring connections. The appearance design of this series of wiring terminals is beautiful and generous, and can be equipped with various accessories, such as short circuit strips, identification strips, and baffles.
Through wall style
Adopting screw connection wire technology, the insulation material is PA66 (flame retardant grade: UL94, V-0), and the connector is made of high-quality high conductivity metal material.
H-type through-wall terminal blocks can be installed side by side on panels with thicknesses ranging from 1mm to 10mm. They can automatically compensate for and adjust the distance between panel thicknesses, forming any number of terminal blocks. Isolation plates can also be used to increase air gaps and creepage distances. Without the need for any tools, the through-wall terminal blocks can be securely installed in the rectangular reserved holes on the panel, making installation extremely convenient.
H-type through-wall terminal blocks are widely used in situations that require through-wall solutions, such as power supplies, filters, electrical control cabinets, and other electronic devices. Good insulation performance and high protection level allow users to work directly after external wiring, eliminating many unnecessary wiring steps. The insulation material of WUK series terminal blocks is modified nylon (PA66), which can be used to connect electrical appliances with a 4mm2 wire voltage of 800V and a current of 41A
WMSTB
The insulation material for PCB wiring terminals is modified imported nylon (PA66), which has good electrical and mechanical properties. Whether you need hard wire to hard wire connection, hard wire to multi-strand wire connection, or multi-strand wire to multi-strand wire connection
Fuse terminal
Modified nylon (PA66) is used as insulation material, which has good electrical and mechanical properties. The screws are made of high-strength copper alloy, the conductive body is made of electrolytic copper, and the wire frame is made of alloy copper that is resistant to stress crack corrosion. These metal surfaces are also protected by tin or nickel plating. All copper terminal blocks can avoid the battery effect of steel metal parts and copper wires in humid environments. There is a connection hole in the middle of the terminal, which can be connected in the center or with a plug-in connector; Electrical products that can connect 4mm2 wires with a voltage of 800V and a current of 41A
Test terminal
The sliding metal part that serves as a switch can withstand the maximum working current through the terminal crimping frame. When switching, use a screwdriver to loosen the screw and move the slider, making the switch position clear at a glance; It is equipped with test sockets at both ends, and can be connected for testing with corresponding test terminals. When measuring current, the operation can be uninterrupted. A control circuit with a voltage of 660V and a current of 57A can be connected.
Universal
The color is gray terminal
Thickness: 6.2 Wire cross-section: 0.2-4:32A: 500V can be installed on U-shaped or G-shaped rails. The double-layer terminal block has twice the wiring capacity of the universal terminal block in the same position. The upper and lower layers are designed to be staggered by 2.5mm, which not only visually clear, but also facilitates wiring operations in the lower layer area with a screw cutter in the case of upper layer wiring, and the identification is clear.
characteristic
By utilizing the existing track type terminal WUK connection technology and adding a circuit composed of electronic components, the transmission coupling of optoelectronic processes has been achieved.
The core of automatic control is that the control unit must be reliably isolated from various sensors and actuators to avoid interference. The WUKG2 optical isolation terminal in Sanmen Bay can effectively complete this function and ensure that the on-site signal matches the low voltage required by the electronic control device. It can also serve as an interface component between the peripheral equipment of process control and the control, signal, and regulator devices, and is suitable for different voltage and power ranges.
Optical isolation terminals have advantages such as low signal loss at the control end, high switching frequency, no mechanical contact shaking, no wear switching, high insulation voltage, no fear of vibration, no influence from position, and long service life. Therefore, they are widely used in the field of automatic control.
Identification standards
This standard is equivalent to the international standard IEC455 (1988) "General Rules for the Identification and Application of Alphanumeric Systems for Equipment Wiring Terminals and Specific Wire Terminals".
Applicable scope
This standard specifies various methods for identifying electrical equipment (hereinafter referred to as equipment) wiring terminals, and formulates general rules for identifying equipment wiring terminals and specific wire terminals using an alphanumeric system.
This standard applies to the identification marking of equipment (such as resistors, fuses, relays, contactors, transformers, rotating motors, etc.) and the wiring terminals of these equipment combinations, as well as to the identification of specific wire terminals.
If necessary, the detailed application of these general rules and necessary auxiliary identification methods for certain products can be provided in relevant standards.
Referenced standards
GB 4728 Graphical Symbols for Electrical Diagrams
GB 5465 Graphical Symbols for Electrical Equipment
recognition methods
One or more of the following methods can be used to identify equipment wiring terminals and specific wire terminals.
3.1 Use the marking system of relevant products to determine and identify the actual or relative positions of equipment wiring terminals or specific wire terminals.
3.2 Use the marking system of relevant products to determine and identify the color markings of equipment wiring terminals and specific wire terminals.
3.3 Use the graphical symbols specified in GB5465. If auxiliary symbols are required, they should be consistent with the graphics in GB4728.
3.4 Use the alphanumeric symbols specified in Chapter 5 of this standard.
application
Colors, graphical symbols, or alphanumeric symbols should be labeled at the corresponding line ends or adjacent locations.
When two or more recognition methods are used and confusion can occur, the relationship between these two recognition methods must be explained in the relevant documents.
System General Rules
5.1 Basic principles
5.1.1 The alphanumeric system consists of uppercase Latin letters and Arabic numerals.
5.1.2 The letters indicating DC components are selected from the first half of the alphabet, namely A to M, and the letters indicating AC components are selected from the second half of the alphabet, namely N to Z.
The letters "I" and "O" cannot be used, and the symbols "+" and "-" can be used.
5.1.3 When there is no confusion, it is allowed to omit certain parts of the complete alphanumeric symbols specified in Article 5.2.
5.2 Marking principles
Terminal markings are based on the following principles:
5.2.1 The two terminals of a single component should be distinguished by two consecutive numbers, with odd numbers being less than even numbers, such as 1 and 2.
5.2.2 Each terminal in the middle of a single component should be distinguished by a number, preferably in natural ascending order. For example: 3, 4, 5, etc. The number of each terminal in the middle should be greater than the number of the terminals on both sides, and the marking should start from the terminal close to the smaller number. For example, the middle terminals of a component with terminals 1 and 2 on both sides should be marked with numbers such as 3, 4, and 5.
Two terminals on both sides and two intermediate terminals
5.2.3 If several similar components are combined into a group, the terminals of each component can be marked with the following methods:
a. Distinguish the terminals on both sides and in the middle by prefixing the numbers with letters as specified in clauses 5.2.1 and 5.2.2, for example:
Mark the terminals of each phase of the equipment in the three-phase AC system with U, V, and W;
b. When it is not necessary or impossible to identify the phase, the method of prefixing the numbers specified in 5.2.1 and 5.2.2 is used to distinguish between the terminals on both sides and the terminals in the middle. To avoid confusion, add a dot between these numbers, for example: the terminals of one component are marked with 1.1 and 1.2, while the terminals of another component are marked with 2.1 and 2.2;
c. The two terminals of each component are distinguished by different consecutive numbers, and the odd number of the component should be less than the even number.
5.4 Identification of specific wire ends
The identification of specific wire end letters and numbers should comply with the provisions in Table 1.
Table 1 Marking of Equipment Specific Wiring Terminals and Identification of Specific Wire Terminals
