German Kniel plug Kniel model Kniel price

Kniel plugs are accessory products used to achieve electrical connections and are categorized industrially as connectors. As industrial automation levels rise and industrial control requirements become increasingly strict and precise, the consumption of terminal blocks is gradually increasing. With the development of the electronics industry, the application scope of terminal blocks is expanding, and their varieties are becoming more diverse. Besides PCB board terminals, the most widely used types include hardware terminals, nut terminals, spring terminals, and more. Terminal blocks are applied to facilitate wire connections; they are essentially metal strips enclosed in insulating plastic, with holes at both ends for inserting wires and screws for tightening or loosening. For example, two wires may need to be connected at times and disconnected at others; terminals allow them to be connected and disconnected at any time without welding or twisting them together, which is very convenient and quick. They are also suitable for interconnecting large numbers of wires. In the power industry, there are dedicated terminal strips and terminal boxes filled with terminal blocks, including single-layer, double-layer, current, voltage, standard, and disconnectable types. A certain crimping area is required to ensure reliable contact and sufficient current carrying capacity.

Kniel plug classification

Terminal blocks can be classified into European-style terminal block series, pluggable terminal block series, transformer terminal blocks, building wiring terminals, barrier-type terminal block series, spring-type terminal block series, DIN rail terminal block series, feed-through terminal block series, and optocoupler terminal blocks. Pluggable types consist of two parts that connect via plug-in: one part clamps the wire and then plugs into the other part, which is soldered onto the PCB board. The mechanical principle at the bottom and the anti-vibration design ensure long-term airtight connection and product reliability. Assembly ears can be added to both ends of the socket; these ears largely protect the contacts and prevent poor alignment, while the socket design ensures correct insertion into the housing. Sockets can also feature assembly clips and locking clips. Assembly clips provide more secure fixation to the PCB board, and locking clips can lock the housing and socket after installation. Various socket designs accommodate different housing insertion methods, such as horizontal, vertical, or angled orientation to the printed circuit board, allowing selection based on customer requirements. Both metric and standard wire gauges can be selected, making this the best-selling terminal type on the market. Barrier types enable safe, reliable, and effective connections, especially in high-current and high-voltage environments. Spring-type terminals are new terminal blocks using spring devices, widely used in global electrical and electronic engineering industries: lighting, elevator control, instruments, power supplies, chemical, and automotive power. DIN rail mounting adopts reliable screw connection technology, electronic fuse technology, and the latest electrical connection technology, widely used in power electronics, communications, electrical control, and power supply fields. DIN rail types use wire clamping and unique self-locking screw designs, making connections reliable and safe. This series features an attractive appearance and can be equipped with various accessories such as short-circuit links, marker strips, and partitions. Feed-through types use screw connection technology, with insulation material made of PA66 (flammability rating: UL94, V-0), and connectors made of high-quality highly conductive metal materials.

Kniel plug material

1) The material of the female or male terminal shall be copper alloy, or plated copper alloy, nickel, or nickel alloy. [Exception: If the structure of the electrical appliance or device permits, the female or male terminal may be plated sheet metal, or a non-plated but corrosion-resistant alloy. 2) If formed female terminals or trimmed male terminals appear in the form of a terminal strip, when the terminal strip is continuously fed into the processing tool, the terminals are crimped and separated from the terminal strip; in this case, the edge where the terminal connects to the terminal strip does not require plating. The standard terminals used in temperature and thermal cycling tests shall be tin-plated sheet steel or corrosion-resistant steel. According to the Rockwell 30T hardness scale, their hardness shall be Rockwell hardness 68 ± 5. Exception: If the female terminal is only suitable for connecting to male terminals made of copper alloy, then C26000 copper alloy standard terminals shall be used for testing. 2.3 According to the Rockwell 30T hardness scale, the hardness of standard terminals made of brass shall be 62 ± 7.

Kniel plug wiring method

1) Apply moderate force when tightening connections to prevent stripping the threads of bolts and nuts due to excessive force. Replace any stripped bolts and nuts immediately; do not continue working with compromised components. 2) When tightening or loosening screws with a screwdriver, press the screwdriver firmly against the screw head before applying torque to prevent slipping, which can damage the screw and make disassembly difficult, especially for common circuit breakers in distribution boxes. 3) If bolts or nuts are difficult to remove, do not act rashly to avoid deformation that makes removal even harder. Tap appropriately or apply screw loosening agents or dilute hydrochloric acid, then attempt removal after a short wait. 4) Do not use pliers to tighten or loosen bolts and nuts to prevent damage. When using an adjustable wrench, adjust the jaw opening properly to prevent damaging or deforming the bolts and nuts, which would make disassembly difficult. 5) Each terminal block allows a maximum of two wires of the same type and specification. 6) For terminal blocks prone to loosening or poor contact, wire joints must be fastened in a "?" shape to increase contact area and prevent loosening. 7) When connecting wire joints or lugs, do not insert non-copper or poorly conductive washers in between. 8) When connecting wire joints, the contact surface must be smooth and free of oxidation. When connecting lugs or copper bars, apply conductive paste to the cleaned contact surface before tightening. 9) When connecting temporary lines, single-strand flexible wires should be folded once at the joint before connecting to the lower terminal of the circuit breaker; single-core solid wires should be connected to the lower terminal of the circuit breaker in a "?" shape. 10) For motor wiring of 30KW and above, no poorly conductive washers (such as galvanized nuts, flat washers, or spring washers) are allowed between the motor output leads and the connecting cables. 11) When wrapping cables or other equipment requiring insulation protection with insulating tape, wrap from one end to the other with a 1/2 overlap ratio, ensuring at least one back-and-forth layer.

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