What are the application aspects of control cables, and what are the characteristics of control cabl

The application of wire and cable can be summarized into three major application areas.

1. Power system.

The wire and cable products used in the power system mainly include bare wires for overhead transmission lines, busbars (busbars), power cables and wires and cables for electrical equipment used in electrical equipment.

2. Information transmission system.

Wires and cables used in information transmission systems include first-class cables, cable TV cables, data transmission cables, radio frequency cables for mobile wireless communication systems and various electronic cables. In recent years, the proportion of optical fiber and cable in the information transmission network has increased rapidly, and it has become the main transmission medium of information transmission lines.

3. Wires and cables for electrical equipment and electrical instruments.

In the two major systems of power and information, from the starting point of the system (such as generators, signal transmitters), through the various nodes of the system (such as transformers, program-controlled switches) to user terminals (such as household appliances, televisions, computers), all these equipment use a large number of wires and cables.

According to their functions, these wires and cables are divided into: one is a carrier magnet wire (winding wire) that converts electrical energy into magnetic energy or converts magnetic energy into electrical energy; The other type, as the connection line of the components in the device, plays the role of transmitting electrical energy or transmitting signals.

The control cable is a PVC insulated and PVC sheathed control cable suitable for industrial and mining enterprises, energy and transportation departments, and for control and protection lines below AC rated voltage of 450 750 volts.

The control cable needs to have the following characteristics: flame retardant, fire resistance, climate resistance, wear resistance, ultraviolet resistance, etc.

Explanation of the reason control cables are often found in critical mechanical and electrical equipment, so they need to be flame retardant and fire resistant to avoid possible fires and**.

Weather resistance can ensure the stability of the cable under different environmental conditions.

Wear resistance can extend the life of the cable.

UV resistance prevents cable aging and fading.

In addition to the above characteristics, the control cable also needs to consider the characteristics of conductivity, shielding, chemical corrosion resistance, etc., to adapt to different industrial fields and application scenarios.

In addition, when using control cables, they need to be selected and installed according to specific electrical equipment and process requirements to ensure their working effect and safety and reliability.

The control cable is a kind of cable that protects the circuit, the main material of this cable is polyvinyl chloride, because this material has good insulation performance, this cable can work normally under the rated voltage of 450 750 volts, so it can control the operation of the circuit very well. The application range of control cables is very wide, including some factories and mines, large energy departments and so on.

The control cable has a certain performance, which is why it can be widely used. First of all, it has very good insulation performance, if it is between conductors, it can reach 1min 1kv can not break down, if it is between conductors and shields, it can also be 1min 3kv can not break down. The second point is the capacitance when it is working, and the average value can reach about 52 F km.

The last thing to talk about is its defense, if it is at 150kHz, the average value of the specified combined power can be greater than 69dB km.

Control cables are different from power cables, and they will have certain differences in various aspects, including their respective performance, etc. Both the control cable and the power cable are one of the five major cables, but the standard is different, the control cable is 9330, while the power cable is GB12706. The color of the insulated core of the two is also different, and the control cable is generally simple black with white words printed on it, but the power cable is generally different.

The two kinds of cables are different because of their different uses, so their thickness is different, the area of the cross-section is also different, the control cable is generally less than 10 square meters, but if it is a power cable, the cross-section will be relatively large.

The ** of the control cable is related to the copper price at that time, the number of copper wires, and the diameter of copper, and there is generally a special formula for calculating **. The cost of ** is related to the price of copper, the weight of copper, etc. The cost of making materials, fixed expenses, taxes, business expenses, profits, etc. are generally included in the cable, so the change of any one of them will cause the change of the entire cable.

Of course, the fixed cost is different, because each company will make reasonable regulations according to its own business, and it is generally production wages, utility bills, and transportation costs.

When using the control cable, there will also be some line problems, damage to the machinery itself, the insulation material due to the use of too long time and aging, can not be used normally, if the use time is too long, the cable will also have some problems due to too high temperature. Therefore, when these problems occur, you must not panic, find the problem of failure, and then find some relevant people to solve it.

You can get it for free

1. The use of control cables: mainly used for transmitting cables for control and measurement signals. The control cable is suitable for mainstream and AC 50Hz, rated voltage.

450 750V, 600 1000V and below industrial and mining enterprises, modern trace source high-rise buildings.

Isolong-range operation, control of furnaces, signals and protection of measuring loops. As the connecting line between various electrical instruments and automation instruments, it plays a role in transmitting various electrical signals and ensuring the safe and reliable operation of the system.

2. Control cables can be divided into ordinary attitude control cables, flame retardant (ZR) control cables, fire-resistant (NH), and low-smoke and low-halogen according to the working category.

DLD), low smoke halogen-free (DW), high flame retardant (GZR), temperature-resistant, cold-resistant control cables, etc.

In the substation there are control cables and power cables.

The control cable is used for the secondary line.

The secondary equipment function is all about protection.

Measure and monitor once.

Power cables are used to send high-voltage electricity.

Its main function is to transmit electrical energy.

The power cable is used to transmit and distribute large-scale electrical energy in the main line of the power system, and the control cable directly transmits the electric energy from the distribution point of the power system to the power connection line of various electrical equipment and appliances.

The rated voltage of the power cable is generally above and above, and the control cable is mainly 450 750V. The insulation and sheath thickness of the power cable is thicker than that of the control cable when the power cable and control cable of the same specification are produced.

1) Control cables belong to electrical equipment cables, and power cables are two of the five categories of cables.

2) The standard for control cables is 9330, and the standard for power cables is GB12706.

3) The color of the insulating core of the control cable is generally black and white, and the low voltage of the power cable is generally colored.

4) The cross-section of the control cable is generally not more than 10 square meters, and the power cable is mainly used to transmit electricity, which is generally a large cross-section. Due to the reasons mentioned above, the specifications of power cables can generally be larger, as large as 500 square meters (the range that conventional manufacturers can produce), and the large cross-section can be made by relatively few manufacturers, while the cross-section of control cables is generally smaller, and the maximum is generally not more than 10 square meters.

In terms of the number of cable cores, the power cable is generally 5 cores at most according to the requirements of the power grid, and the control cable is used to transmit control signals, and the number of cores is more, according to the standard, there are more than 61 cores, but it can also be produced according to user requirements.

Cables are ubiquitous in modern life and production, and the electricity we use in life and the cars we drive are inseparable from all kinds of cables. So what is the difference between power cables and control cables, and how to tell them?

Generally, cables starting with the letter K are control cables. According to the requirements of the use environment, cables can be divided into: ordinary cables, flame retardant cables, fire-resistant cables, low-smoke halogen-free cables, home improvement wires, mineral insulated cables, etc.

In strong electricity, cables are divided into: control cables, high-voltage cables and low-voltage cables. But remember:

The control cable is not meant to transmit signals! Rather, the current flowing through the control cable is generally less than 5A, so the cross-section of the control cable is below.

Control cables. First of all, we can make a simple distinction in terms of shape, color, number of cores, etc.:

1. The difference in the color of the core: the color of the insulated core of the control cable is generally black and white, and the low voltage of the power cable is generally separated.

2. The difference in the number of cable cores: the number of power cable cores is less, there are single cores, two cores, 3 cores, 4 cores (three-phase four-wire system), 5 cores (three-phase five-wire system), according to the requirements of the power grid, the maximum is generally 5 cores. The control cable is used to transmit control signals, and the number of cores is more, from 2 cores to 61 cores, or even more.

The control cable also adopts a variety of core structure, shielding and other measures to obtain satisfactory electromagnetic compatibility effect.

3. Difference between wire skins: power cables require wire skins to have sufficient compressive strength, tensile strength, temperature resistance and corrosion resistance. The requirements for control cables are relatively low.

Power cables. Then it is to distinguish from the performance and application of power cables and control cables

1. The difference in the cross-section: the power cable is a load wire, the current carrying capacity increases with the increase of power, and the cross-section of the wire application must also increase with the increase of the current, so the specifications of the power cable are generally larger, as large as 500 square meters (the range that conventional manufacturers can produce), and the large cross-section can be done by manufacturers is relatively few, and the control cable is a secondary command wire, which controls the current-carrying operation of devices such as contactors, the load current is very small, and the wire cross-section is extremely small, so the cross-section of the control cable is generally small. The maximum is generally not more than 10 square meters.

2. The difference between rated voltage: the rated voltage of power cables is generally above and above, and the control cables are mainly 450 750V.

3. The difference in function: the control cable directly transmits the electric energy from the distribution point of the power system to the power connection line of various electrical equipment and appliances, and the power cable is mainly used in the transmission, distribution, transmission, transformation and power supply lines in the strong electric energy transmission, the current through is large, and the power cable is used to transmit and distribute large functional electric energy in the main line of the power system.

When the same specification of industrial electrical power cables and control cables is produced, the insulation and sheath thickness of the power cable is thicker than that of the control cable. First of all, the control cable belongs to the cable for electrical equipment, and the power cable is two of the five categories of cables. The standard for control cables is 9330, and the standard for power cables is GB12706.

Difference 1: In order to reduce the voltage drop on the wire, the general wire diameter of the power cable is thicker, and the control signal wire diameter of the control cable with a small current can be small. This is based on the requirements for use.

The cost of thick wire is high, and the line is not easy to walk. Therefore, in the case of leaving a margin to ensure the safety of use, the wire diameter is enough.

Difference 2: The wire skin of the wire is different. Power cables require that the wire skin has sufficient compressive strength, tensile strength, temperature resistance, and corrosion resistance. The requirements for control cables are relatively low.

Difference 3: The number of power cable cores is less, there are single core, two cores, 3 cores, 4 cores (three-phase four-wire system), 5 cores (three-phase five-wire system).

The biggest difference is that the power cable wire diameter is significantly larger than the control cable. Power cables are usually four-core, or five-core, and control cables are often more than ten cores.

The insulation level is different, the control is generally 500V or 750V, and the minimum power cable is 1000V.

In addition, the shielding method is also different.