Structure of control cable products
Control cableThe structural elements of the product are generally divided into four main structural elements: wires, insulation layers, shielding and protective layers, as well as filling elements and stretching elements. According to the use requirements and application conditions of the products, some products have extremely simple structures and are a kind of structures of wires, such as overhead bare wires, contact network wires, copper-aluminum buses (busbars), etc, the external electrical insulation of these products is ensured by the spatial distance from the insulator (I. e. air insulation) during installation and laying. So, what is the structure of the control cable product, take a look!
The wire is the main component of the product for the current and electromagnetic wave information transmission function. The wire is the abbreviation of the conductive wire core. It is made of non-ferrous metals with excellent conductivity such as copper and aluminum. The optical fiber cable for optical communication network developed rapidly in the past 30 years uses optical fiber as the wire.
2. Insulation layer
Control cableIn the wire wrapped around the role of electrical insulation components, that is, the transmission of current, electromagnetic waves, light waves can only be along the wire, can not flow to the outside, can cut off the potential on the conductor, that is, the potential difference formed by the surrounding objects, that is, voltage, to ensure the normal transmission function of the wire, while ensuring the safety of external objects and the human body
Conductors and insulation are the two basic components required to make cable products other than bare wires.
3. Protective layer
When the control cable is installed in various environments, it is necessary to protect the whole product, especially the parts of the insulating layer, which is the protective layer.
As insulating materials are required to have excellent electrical insulation properties, they are required to have high purity and minimal impurity content. In most cases, the protection capability to the outside world cannot be taken into account, so various protective layer structures must bear the resistance and resistance to various mechanical forces from the outside world (I .e. setting, use scene, in use), atmospheric environment resistance, chemical resistance and oil resistance, biological invasion prevention, fire damage reduction, etc.
Most of the cable products dedicated to clean, dry, no mechanical external force, such as indoor and other good external environment, the insulation layer material itself has a certain mechanical strength, weather resistance products, can also be no protective layer such components.
It is a component that isolates the electromagnetic field in the cable product from the external electromagnetic field; the cable product must also be isolated from each other between different pairs (or groups) within it. The shielding layer can be said to be an "electromagnetic isolation screen".
Yanggu cable factory, cable factoryTo tell you, many wire and cable products are multi-core. If the insulated wire core and wire are made into cables in pairs, one is not round in shape, and the other is that there is a large gap between the insulated wire cores.
What are the main points of purchasing wires and cables? Let's take a look. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. Its quality directly affects the quality of the project and the safety of consumers' lives and property. There are many wire varieties on the market, and appropriate wires should be used according to their own power load.
What are the precautions for wires and cables? Let's take a look. Common cable faults: wire surface markings-according to national standards, the wire surface should have continuous markings of the manufacturer's name, product model and rated voltage. This helps to find the manufacturing plant in time when there is a problem during the use of the wire, and consumers should pay attention to this when buying the wire.
There are many kinds of wire and cable products for electrical equipment on the market, which are difficult for ordinary consumers to distinguish. So what are the main categories of wire and cable products? What are the product naming principles of wire and cable? The editor brings you a brief understanding of relevant content knowledge.
The wires and cables for electrical equipment are mainly used for internal or external connection of electrical equipment, low-voltage transmission lines and various electrical signal transmission lines. Generally speaking, except for power cables, communication cables and magnet wires, most insulated wires and cables are classified as wires and cables for electrical equipment.
Electrical equipment with wire and cable is a large class of wire and cable products, a wide range of applications, many varieties, many series, large output, process type complex. The rated voltage of wires and cables for electrical equipment is low, and the working voltage is 450/750v and below, which is not more than 0.6/1kv. The working voltage of signal and instrument cables is usually 300/500v and below. The ampacity of the cable is determined according to the requirements of the cable.
Low voltage power cable winter pay attention to matters? As the weather gets colder and colder, manufacturers of low-voltage power cables usually become more difficult, which brings inconvenience to construction. Here are some precautions for winter construction. Let us take a brief look.