The cable lug has good electrical and mechanical properties and can be used for a long time under various harsh environmental conditions. It has the advantages of light weight and easy installation. There are many kinds of cable lugs, among which tubular cable lugs are common.
Tubular cable lugs are made from electrolytic copper and are offered by various manufacturers. Tubular cable lugs have different dimensions and lengths to DIN cable lugs - as a rule, they are shorter than DIN compression cable lugs and have different tube dimensions.
With hexagonal crimping, only multi-stranded conductors can usually be processed with the tubular cable lug. This is down to the properties of fine-stranded conductors. With indent-like crimp profiles, it is also possible to crimp fine-stranded conductors. Multi-stranded, sector-shaped conductors can, of course, also be processed in these cable lugs. This requires the conductor to be pre-rounded with the appropriate sleeves and round crimping dies. Unlike DIN compression cable lugs, the advantage of the tubular cable lug lies in the manufacturing costs. Less copper is required for tubular cable lugs, and this is reflected in the procurement costs.
F cable lugs have a larger tube diameter than standard cable lugs. Also, they are widened into a bell shape in a complex manufacturing process to guarantee better cable insertion. So F tubular cable lugs allow the conductor to be inserted easily and reliable.
Of course, this also has safety-related effects: cross-section tapering due to kinked or un-inserted strands is prevented, and so the full cross section of the conductor is retained.
Indent and quad-point indent crimping or notch crimping with suitable tools is the ideal solution for achieving a professional crimping process for F cable lugs.
E series tubular cable lugs are also made from tin-plated electrolytic copper. These cable lugs have an adapted tube diameter, which guarantees optimum crimping of solid conductors. The fields of application include those involving solid single stands, in transformer or engine construction for example. For E series tubular cable lugs, there are suitable joint and T- and cross-connectors with matching inside diameters for single-stranded conductors.
In control cabinet construction, installation engineers face several challenges. Aside from the fact that confined spaces usually hamper progress anyway, connecting conductors to powerful switchgear proves especially tricky – from a certain conductor cross-section onwards, conventional tubular cable lugs do not fit into connecting terminal provided. For these difficult applications, special tubular cable lugs for switchgear connections have been developed ("SG cable lugs"). They have a much narrower palm which is readily compatible with the switch gear connection.
The palm of these cable lugs is not only much narrower than that of a conventional cable lug, it is also slightly thicker. This is down to the production process, which uses the same amount of electrolytic copper as for a conventional tubular cable lug.
This tubular cable lug profile is therefore best suited for use in control cabinet construction. They can be processed in exactly the same way as the standard cable lug. Suitable crimp profiles would be the hexagonal crimp, the indent crimp or the notch crimp. The bores are adapted to the dimensions of connecting terminals of standard switchgear.
Hostile environments likewise call for special cable lugs. Tubular cable lugs from stainless steel and nickel withstand most conditions and are the ideal solution for crimping copper conductors.
Stainless steel tubular cable lugs are extremely acid and corrosion resistant, and hence especially suited to use in the chemical and foodstuffs industries or for sectors where connectors are exposed to seawater.
Stainless steel is not only highly resistant to acids, it can also withstand high temperatures. Stainless steel cable lugs can therefore be used at ambient temperatures of up to 400°C without a problem.
When the going gets even hotter and cable lugs for particularly high temperatures are required, for example in the high-temperature sector of annealing or heating furnaces, nickel tubular cable lugs are the answer. These lugs are able to withstand temperatures of up to 650°C.
Cable wire terminal is often used for cable end connection and continuous connection, which can make the connection between cable and electric appliance more firm and safe. With the development of science and technology, the invention of special-purpose tubular cable connector greatly improves the efficiency and operation safety of cable engineering.