Difference between Electrical Cable and Control Cable
2022-07-20 16:42We often hear about power cables and control cables in engineering projects, but do you know the differences between power cables and control cables? Here is a detailed introduction.
1. The difference between the Executive Standards of power cables and control cables: the standard of control cables is 9330, and the standard of power cables is gb12706.
2. The difference between the color of the cable core of power cable and control cable: the color of the insulated core of control cable is generally black with white characters, and the low voltage of power cable is generally color separated.
3. The difference between the function of power cable and control cable: the control cable directly transmits electric energy from the distribution point of the power system to the power connection lines of various electrical equipment and appliances, while the power cable is mainly used for the transmission of strong electric energy in the power generation, distribution, transmission, transformation and power supply lines. The current passing through is large, and the power cable is used for the transmission and distribution of large functional electric energy in the main line of the power system.
4. The difference in cross-section between power cable and control cable: power cable is a primary load conductor, and the carrying capacity increases with the increase of power, and the application cross-section of conductor must also increase with the increase of current. Therefore, the specification of power cable is generally large, up to 500 square meters (the range that conventional manufacturers can produce), and there are relatively few manufacturers who can do it with a larger cross-section, while the control cable is a secondary command conductor, What is controlled is the current carrying operation of contactors and other devices. The load current is very small, and the wire cross-section is very small. Therefore, the cross-section of the control cable is generally small, and the maximum is generally not more than 10 square meters.
5. The difference between the number of cores of power cable and control cable: the number of cores of power cable is small, including single core, two core, three core, four core (three-phase four wire system), five core (three-phase five wire system). According to the requirements of power grid, the maximum number of cores is generally five. The control cable is used to transmit control signals, with a large number of cores, ranging from 2 cores to 61 cores, or even more. The control cable also adopts various core structures, shielding and other measures to obtain satisfactory EMC effect.
6. The difference between the rated voltage of power cable and control cable: the rated voltage of power cable is generally 0.6/1kv and above, and the rated voltage of control cable is mainly 450/750v.
7. Difference between power cable and control cable: power cable requires that the cable cover has sufficient compressive strength, tensile strength, temperature resistance and corrosion resistance. The requirements for control cables are relatively low. When industrial electrical power cables and control cables of the same specification are produced, the insulation and sheath thickness of power cables are thicker than that of control cables.
