As an important part of power transmission and distribution, wire and cable are widely used in various fields. This article will give you a comprehensive introduction to the types, uses, selection principles and characteristics and advantages of heat shrinkable cable head.

1. Types of wire and cable

According to the use, wire and cable can be divided into a variety of types, including bare wire, insulated wire, heat resistant wire, shielded wire, power cable, control cable, communication cable and radio frequency cable. Each type of wire and cable has its specific application scenarios andadvantages.

2. Types of insulated wires

Insulated wires are an important type of wire and cable, commonly used for connecting various electrical devices. Common types of insulated wires include PVC insulated wires, PVC insulated flexible wires, nitrile-PVC hybrid insulated flexible wires, rubber-insulated wires, agricultural underground buried aluminum-core plastic-insulated wires, rubber-insulated cotton-woven flexible wires, PVC insulated nylon-sheathed wires, and PVC insulated flexible wires for power and lighting applications.

3. Applicable occasions of cable tray

Cable tray is a kind of device used to support and fix cables, suitable for indoor and outdoor overhead power cable laying in general industrial and mining enterprises, control cable. At the same time, it can also be used for indoor and outdoor cable laying in telecommunications, radio and television departments.

4. Types of cable accessories

Cable accessories are essential components in the process of wire and cable connection and installation. Commonly used cable accessories include cable terminal junction box, cable intermediate junction box, connecting pipe and terminal, steel plate junction box and cable bridge, etc.

5. Definition of cable intermediate joint

The cable intermediate joint is a device that connects the conductor, insulation shielding layer and protective layer of the cable. It enables the cable line to realize the function of connection and transmission of electric energy.

6. Definition of main electrical wiring

Electrical main wiring is the connection mode of the main electrical equipment and busbars in power plants and substations. It includes the connection mode of the main busbar and the plant power system according to certain functional requirements, which is an important part of the power system.

7. Regulations on the selection of power cable section

When selecting power cables, certain regulations must be followed. First, the rated voltage of the cable should be greater than or equal to the rated voltage of the power supply system at the installation point; second, the continuous allowable current of the cable should be equal to or greater than the maximum continuous current of the power load; at the same time, the cross-sectional area of the conductors must meet the stability requirements in case of a short circuit in the power supply system; additionally, the voltage drop along the length of the cable must be verified to ensure it meets the requirements; finally, the minimum short-circuit current at the end of the line should allow the protection devices to operate reliably.

8. Advantages of cross-linked polyethylene cable and oil paper cable

Cross-linked polyethylene cables and oil-paper cables have multiple advantages. First, they are easy to install due to their small allowable bending radius and light weight; second, they are not restricted by line elevation differences; at the same time, they offer excellent thermal performance, allowing for high operating temperatures and large transmission capacity; furthermore, cable accessories are simple and dry in structure; operation and maintenance are straightforward with no oil leakage issues; they are cost-effective with high reliability and low failure rates; finally, manufacturing processes are minimal and straightforward, leading to significant economic benefits.

9. Requirements for fixtures to fix single-core AC cables

When securing single-core AC cables, the requirements for clamps are crucial. Clamps should not consist of iron components that form a closed magnetic circuit, as current passing through the cable core generates magnetic flux around it. Using ferromagnetic materials like iron as clamps can induce eddy currents in the iron, causing the cable to heat up or even burn out. Therefore, iron parts must not be used as clamps for single-core AC cables.

10. Characteristics and advantages of heat shrink cable head

Thermoplastic cable heads are a new type of cable accessory with multiple features and advantages. First, they use stress pipes instead of traditional stress cones, simplifying construction processes and reducing the terminal size of joints; second, installation is convenient and time-saving; at the same time, they offer superior performance and save on metal usage; finally, thermoplastic cable accessories combine the advantages of both injection-molded and dry-bundled types.