Everyone knows that power cables and control cables are all about providing cable transmission equipment. As we all know, power cables are used in urban power grids or power stations, while control cables are suitable for industrial and mining enterprises, energy and transportation departments. In addition to their different scope of application, what other aspects are different?
1. The difference in function: 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, while power cables are mainly used in power generation, distribution, transmission, transformation, and power supply lines. Electric energy transmission, the passing current is large, and the power cable is used to transmit and distribute large-function electric energy in the main line of the power system.
2. the difference of core color: the color of the insulated core of the control cable is generally black with white characters, and the low voltage of the power cable is generally color-separated.
3.the difference in implementation standards: the standard for control cables is 9330, and the standard for power cables is GB12706.
4. The difference in cross section: The power cable is a primary load wire, and the current carrying capacity increases with the increase of the power. The cross section of the wire application must also increase with the increase of the current. Therefore, the size of the power cable is generally large, as large as 500 square meters (the range that can be produced by conventional manufacturers), no matter how large the cross-section is, fewer manufacturers can do it, and the control cable is a secondary command wire, which controls the current-carrying operation of contactors and other devices, and the load current is extremely small , The cross-section of the wire is extremely small, so the cross-section of the control cable is generally small, and the maximum generally does not exceed 10 square.
5. The difference between the wire sheath: The power cable requires the wire sheath to have sufficient compressive strength, tensile strength, temperature resistance and corrosion resistance. The control cable requirements are relatively low. When the same specifications of industrial electrical power cables and control cables are produced, the thickness of the insulation and sheath of the power cables is thicker than that of the control cables.
6. The difference in the number of cable cores: power cables have fewer cores, including single-core, two-core, 3-core, 4-core (three-phase four-wire system), and 5-core (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, 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 electromagnetic compatibility effects.
7. The difference in rated voltage: The rated voltage of power cables is generally 0.6/1kV and above, and the control cables are mainly 450/750V.
The above is the introduction of the difference between power cables and control cables. When using these two cables, you must choose the appropriate cable according to the actual requirements. Don’t be confused.