简体中文
There are many kinds of cables in the market. Among them, control cables and power cables are common in our daily lives. Here is how to distinguish between control cables and power cables. Mainly from the following aspects:
1. Distinguish the number of cores
There are many cores of the control cable, generally 61 cores, and more can be customized according to the actual requirements of customers. The number of cores of the power cable is generally 5 cores, and the control cable is mainly used to transmit control signals. The power cable is used in the main line of the power system to transmit and distribute large-function electrical energy. The control cable directly transmits electrical energy from the power distribution point of the power system to the power connection lines of various electrical equipment and appliances.
When a spare core in the control cable is grounded, the amplitude of the interference voltage can be reduced to 25%-50%, and the implementation is simple, and the cost of the cable increases slightly.
2. The metal shield and the shielding layer are grounded
Metal shielding is an important measure to reduce and prevent electrical interference, including general shielding, sub-shielding and double-layer general shielding to the core. The selection of the metal shielding type of the control cable should be based on the strength of the electrical interference that may be generated, and the comprehensive interference suppression measures should be included to meet the requirements of reducing interference and overvoltage. The higher the requirements for the anti-interference effect, the greater the corresponding investment. When steel tape armor and steel wire braided total shielding are used, the price of the cable will increase by about 10%-20%.
Control interference in the strong current circuit, due to its own strong signal, except for the ultra-high voltage power distribution device or the long parallel to the high-voltage cable, all control cables without metal shielding can be used. The control cable used in the weak current signal control loop, when it is located in an environment affected by interference and does not have effective anti-interference measures, a metal shielded control cable should be used to prevent electrical interference from causing misoperations on the low-level signal loop. Or cause insulation breakdown and other influences. If the control cable of the weak current circuit can be separated from the power cable by a sufficient distance or laid in a steel pipe, the external electrical interference may be reduced to the allowable limit.
3. Specifications and colors
The standard for control cables is 9330, and the standard for power cables is GB12706. The color of the insulated core of the control cable is generally black with white lettering, and the low voltage of the power cable is generally color-separated. The cross-section of control cables generally does not exceed 10 square meters, and power cables are mainly used for power transmission, and generally have large cross-sections.
1. Distinguish the number of cores
There are many cores of the control cable, generally 61 cores, and more can be customized according to the actual requirements of customers. The number of cores of the power cable is generally 5 cores, and the control cable is mainly used to transmit control signals. The power cable is used in the main line of the power system to transmit and distribute large-function electrical energy. The control cable directly transmits electrical energy from the power distribution point of the power system to the power connection lines of various electrical equipment and appliances.
When a spare core in the control cable is grounded, the amplitude of the interference voltage can be reduced to 25%-50%, and the implementation is simple, and the cost of the cable increases slightly.
2. The metal shield and the shielding layer are grounded
Metal shielding is an important measure to reduce and prevent electrical interference, including general shielding, sub-shielding and double-layer general shielding to the core. The selection of the metal shielding type of the control cable should be based on the strength of the electrical interference that may be generated, and the comprehensive interference suppression measures should be included to meet the requirements of reducing interference and overvoltage. The higher the requirements for the anti-interference effect, the greater the corresponding investment. When steel tape armor and steel wire braided total shielding are used, the price of the cable will increase by about 10%-20%.
Control interference in the strong current circuit, due to its own strong signal, except for the ultra-high voltage power distribution device or the long parallel to the high-voltage cable, all control cables without metal shielding can be used. The control cable used in the weak current signal control loop, when it is located in an environment affected by interference and does not have effective anti-interference measures, a metal shielded control cable should be used to prevent electrical interference from causing misoperations on the low-level signal loop. Or cause insulation breakdown and other influences. If the control cable of the weak current circuit can be separated from the power cable by a sufficient distance or laid in a steel pipe, the external electrical interference may be reduced to the allowable limit.
3. Specifications and colors
The standard for control cables is 9330, and the standard for power cables is GB12706. The color of the insulated core of the control cable is generally black with white lettering, and the low voltage of the power cable is generally color-separated. The cross-section of control cables generally does not exceed 10 square meters, and power cables are mainly used for power transmission, and generally have large cross-sections.
In addition, due to the different raw materials used in the production process, the main raw materials for the production of wires are electrolytic copper, insulation materials and sheath materials. Power cables are used in the main line of the power system to transmit and distribute large-function electrical energy. The control cables directly transmit electrical energy from the power distribution point of the power system to the power connection lines of various electrical equipment and appliances. The rated voltage of the power cable is generally 0.6/1kV and above, and the control cable is mainly 450/750V. When power cables and control cables of the same specifications are produced, the thickness of the insulation and sheath of the power cables is thicker than that of the control cables.
