Name of product structure and material of cable

(1) the wire: the most basic essential main component products are current or electromagnetic wave information transmission function.
Main material: the wires are electrically conductive wire core referred to, made by conductive properties of copper, aluminum, copper clad steel, copper clad aluminum and other non-ferrous metal with excellent, optical fiber as the wire.
A bare copper wire, tinned wire; single branch, strand; twisted tinning line.
(2) the insulating layer is coated components: plays a role in wire electrical insulation periphery. That can ensure the transmission of current or electromagnetic waves, light waves travel along the wires and not only flow to the outside, the conductor has the potential (i.e. potential on the formation of the surrounding objects, namely the difference voltage) can be isolated, i.e., both to ensure the normal transmission function of the wire, but also to ensure that the external object and personal safety. Conductor and the insulating layer is composed of terminal block products (except the bare wire) two basic components must have. Main material: PVC, PE, XLPE, PP, F, polypropylene fluorine plastics, rubber, paper, mica tape
(3) filling structure: a lot of wire and cable products are the multi core, these insulating wire core or lines on the cable (or packet multiple cable), a shape is not round, two is an insulating cable core has the very big space, and must join the filling structure in the cable, filling knot the structure is to make the cable outer diameter relative round in favor of bag, extrusion sheath. Main material: PP rope
(4): is a kind of shielding barrier terminal block products in the field and outside electromagnetic isolation components; cable products from different lines in its internal (or group) to also need mutual isolation between. The shielding layer can be said to be an "electromagnetic screen". The conductor shielding of high voltage cables and insulation shielding to electric field distribution homogenization. Main material: bare copper wire, copper clad steel wire, tinned copper wire
(5) layer of protection: when the electric wire and cable products running in different environments, must have on the overall product, especially for the insulating layer protective component, which is the protective layer.
Because the requirements of insulating material has excellent variety of electrical insulation properties, must demand extremely high purity and impurity content of materials; often fail to take into account their on the outside of the protection ability, so for the outside world (i.e., installation, application occasions and in various mechanical force) bearing or resistance, resistance to atmospheric environment, chemical resistance or oil, to prevent biological invasion, and reduce the fire hazards must be composed of various protective layer structure to bear. Main materials: PVC, PE, rubber, aluminum, steel strip
(6) the tensile element: the typical structure is a steel core aluminum stranded wire, fiber optic cable and cable etc.. In a word, the development of special fine, soft, also requires repeated bending, distorting the use of products, the tensile element plays a major role in.

Terminals requirements

Mechanical structural safety requirements terminals in terms of chemistry and structural materials and moving parts to ensure the safety of live, such as shell edges, hardware aspects of glitches, and various parts of the connection strength, even stable under electrical terminal block exercise conditions sex, above all in the mechanical structure of the power industry requirements for terminals.
2, enclosure protection requirements mainly JB / T 9568-2000 provides for protection class, it is mainly divided into two types, one is solid foreign protection level, one is water damage caused to equipment and products.
3, insulation coordination requirements are mainly based on the materials used, the working voltage and environmental pollution levels, come together to select clearances and creepage distances, thereby protecting the safety of staff and products work, but also make the product does not occur in the over-voltage insulation damage .
4, the tracking index requirement for the product in the course of the surface of the solid insulating materials in the electric field and an electrolyte to form a conductive path, so that the insulating properties of the insulating material housing decline, affecting the safety of the product. If insulation voltage level at the same conditions, tracking index is high, the product creepage distance can be reduced, if the product enters power sector development in this regard, please pay full attention.
5, the thermoplastic material in the work requirements of the deformation, which is mainly of the temperature and the contact resistance of the terminals in the work, the high temperature which causes the deformation of the housing becomes soft, so that the electrical short-circuit, resulting in a serious accident, so the carrier terminals Select the material flow components was very important.
6, electric shock requirements, the structural aspects of the operating element should not be charged, terminal and internal PCB Spring Terminal Block connections should be accessible to this area mainly for screw torque and reliability requirements, should prevent the screw terminals can be touched, Loose wires accidentally shorted. Such as the ground terminal requirements: ground resistance class security products should not exceed 0.5Ω.