The bus duct has the characteristics of large current carrying capacity, relatively short construction period and longer service life. Compared with the cable, it has certain comparative advantages and adapts to the requirements of large-scale and high-quality development of cement engineering. Next, Shandong cable bridge manufacturer will talk about the performance comparison between bus duct and cable.
Comparison of current carrying capacity and electric energy loss
The bus duct is a flat conductor with good heat dissipation, low impedance and large current carrying capacity. The rated current can generally reach 6300A, which is difficult for cables with such high current carrying capacity. Under the same current carrying capacity, when the current carrying capacity is more than 630A, the copper consumption of bus duct and cable can be saved by 15%~30%, and the power consumption can be reduced by about 15%. When laying cables, the heat dissipation temperature of cables in the bridge and the number of cables in the bridge should be considered, while the laying of bus duct only needs to meet the limit temperature rise current specified in the specification, which is of positive significance for the construction of green projects.
The installation of bus duct is relatively convenient and the cable laying and wiring is relatively flexible, but the cable laying requires additional installation of cable bridge. In contrast, the construction period of bus duct is short and the installation cost is low, which will not affect the overall project duration. The bus duct can be installed and tapped by plugging, and the power supply of the main line can be introduced into different branches. The on-site tapping is more convenient. At the same time, the distribution and installation of the bus duct is generally trunk type, while the cable distribution is generally point-to-point radial type. The cable will occupy a large space at the distribution entrance and exit, while the bus duct will occupy a small space, which is also the reason why the bus duct is widely used in high-rise buildings or large plants.
The unit price of bus duct is measured by straight section, and the installation cost is generally included. The unit price of cable does not include the cost of cable bridge and the installation cost of cable and bridge. The unit price of flame-retardant halogen-free low-smoke cross-linked polyethylene insulated cable (WDZ-YJY) is close to that of 4P dense bus duct with the same carrying capacity, while the cost advantage of flame-retardant cross-linked polyethylene insulated PVC sheathed power cable (ZR-YJV) is large.
For places with small power load (below 630A) and few branch circuits, cables are better for distribution; For places with large electrical load (more than 630A) and many branch circuits, it is better to use bus duct.
When high-power low-voltage frequency conversion cabinet, soft start cabinet and low-voltage cabinet are not combined, bus duct connection can save on-site construction time; Large power plants generally have a large demand for electricity, and bus ducts can also be set in large power plants; Sliding contact bus duct can be used in places requiring mobile equipment such as maintenance workshop. Come to our website if you need http://www.sddlqj.cn consulting service