Professional Cable Tray Manufacturer

With the in-depth development of market economy, a variety of new technologies have been introduced and developed, and new products have emerged one after another, which have been widely used in construction engineering. 
Compared with traditional products, they have greater advantages in terms of manufacturing process, material performance, product quality or production cost, installation technology and construction methods. 
Single-core branch cable and traditional compact bus slot are one of the examples. 
1 performance characteristics of single-core branch cable and compact bus slot the so-called branch cable is to set up a cable T joint in the required part of the cable. 
It is in the factory, using a specific process to make the joint, the joint part of the PVC synthetic material is divided into two injection molding, integrated. 
The electrical and physical properties of branch cable products have been strictly tested before leaving the factory, so it has the advantages of high reliability, airtight waterproof, flame retardant and fire resistance, and low price, convenient installation, short construction period and no maintenance. 
Branch cable can be divided into single-core and multi-core, but single-core branch Cable tray supplier has the advantages of light weight, small outer diameter, many specifications, simple installation and construction compared with single-core and multi-core cable with the same cross-section because of its simple manufacturing process and low price. the price of a multi-core cable is obviously higher than the sum of multiple single-core cables with the same cross-section, so single-core branch cables are generally chosen when choosing branch cables. 
Bus slots are divided into two types: dense insulation type and air insulation type. 
The air insulation type has the advantages of light weight, simple structure and cheap price, while the dense insulation type has good heat dissipation conditions and high current grade. 
In general, there is a plug joint on each floor of the bus slot installed in the electric pipe of a high-rise building. 
The products are produced by bus slot manufacturers and transported to the construction site by stages for installation and connection with bolts. 
Therefore, the reliability of bus slot joint is greatly affected by human factors, which is relatively lower than the finished branch cable. 
 comparison between single-core branch cable and tight bus slot during construction and installation 2.1 flexible branch cable is laid and installed by the manufacturer according to the actual size of the distribution system in the well (mainly layer height, location of branch joint of each layer, etc.) according to the electrical vertical pipe of the building, produced in the factory, after testing before shipment, like ordinary cables, wound on the wooden reel. 
Compared with the busbar, the branch cable makes the on-site installation more convenient and easier to manage. 
There are two ways of actual laying: pull up from the bottom and drop from the top down. 
From bottom to top, a turret is set up at the top of the pipe well, and the cable clamping device (provided by the manufacturer) is used to lift the branch cable from the starting layer of the laying. 
From top to top, the branch cable is transported to the laying termination layer and slowly lowered from top to bottom. 
After the cable is placed, it is directly fixed to the wall on each layer with a wooden clamp or support, or it can be laid along the cable tray together with other ordinary cables. 
Branch cable laying has lower requirements for the quality of installers, which is different from bus slots and must be connected and assembled on site after leaving the factory. 
When the busbar slot is connected by bolts, it is necessary to ensure a moderate joint torque, which requires higher requirements for the installation workers. 
Ordinary busbar slot manufacturers have no requirements for this during on-site installation, and installers only use ordinary wrenches to tighten bolts according to feeling. 
In fact, the on-site bolt connection is too tight and too loose will have a potential impact on the inherent performance and quality of the busbar. 
2.2 applicability of product structure branch cables are generally laid in electrical vertical pipe wells in high-rise buildings. 
As we all know, high-rise buildings are affected by wind load and other factors, the tube of the main building will sway under normal use conditions. 
For the high-rise building with the main body of the frame structure, the left and right offset caused by this shaking increases with the increase of the height of the story. 
The offset caused by the ordinary high-rise building less than 100m (more than 100m is called super high-rise building) should be close to 20cm. 
The offset of super high-rise buildings is even larger. 
In other words, there is an obvious dynamic shift in the reserved hole of the electric pipe which is required to be aligned up and down. 
This phenomenon does not have a problem with the branch cable, but has an impact on the bus slot. 
Because the branch cable is a flexible structure and the bus slot is a rigid object, the bus slot after installation appears to be at a loss to the shaking phenomenon of the building, and the large offset may affect the quality and safety of the bus slot. On the other hand, the branch cable is good at dealing with this phenomenon. 
2.3 the economy of project management in the case of the same load, the material cost of the branch cable should be greatly reduced compared with the bus slot. 
Especially for bus slots below 630A, if the branch Cable tray supplier with the same current level is selected, the reduction of material cost (including accessories) is more obvious. 
In addition, the installation is convenient and the on-site construction labor is saved, and the total construction cost is greatly reduced. 
Of course, at present, the branch cable can only achieve the 1000mm cross-sectional area, and the rated current is about 1600A, while the rated current of the bus slot * can reach 5000A. 
Moreover, branch cables with current levels of 800A and above will not have a price advantage. 
Therefore, for large-capacity distribution trunk lines, the application of branch cable also has its limitations. 
3 comparison and analysis of the two schemes of branch cable and bus slot adopted in an engineering example the "15-24 floor lighting" load of an office building is planned to adopt trunk-type power distribution, and the wiring in the well from 15-24 layer electric pipe is laid with single-core branch cable or tight bus slot. 
The actual wiring is as follows: from the low-voltage distribution of the substation to the branch cable transfer box at the top of the 14-layer electric pipe (or bus slot inlet box), the single-core cable is used, and the line length is 80m. the load capacity of each lighting master box (15~24PM) is the same, and the power factor cos ψ = 0.8 (has been compensated by capacitors). 
The load demand factor of the trunk line is Kv 0.8. 
for the sake of comparison, it is assumed that the load capacity of each layer is 50,40,30,25,20,16kW respectively. 
the cable adopts XLPE insulated vinyl chloride sheathed copper core cable, and the stainless steel bridge adopts dense insulation type. 
In the two schemes, the same single-core cable is laid along the bridge from the low-voltage distribution cabinet to the 14-layer electric pipe drilling cable transfer box (or bus slot inlet box), so the comparison of their material prices only needs to be estimated.