The choice and installation of cable tray

First, the scope of application:
XQJ series of cable stayed bridge in the application of voltage for 10 kV power cables below. And control cables, wiring, such as indoor lighting, outdoor overhead cable trenches, laying of the tunnel.

Second, the results of the characteristics and the installation of:
XQJ series of cable tray with a wide variety, the application widely, strength, structure, light, low cost and simple construction, flexible wiring, installation standards, the characteristics of beautiful appearance of your Office of technical improvements, the expansion of cable, the maintenance of maintenance brought about by convenience.
XQJ series cable tray can be installed in line with local conditions. Overhead pipes can be laid with the process; floor beam under the lifting; indoor and outdoor walls, column-wall, tunnel, cable trench side wall mounted, but also in the open column or buttress to install large-scale multi-storey bridge or legislation lifting equipment, the I-steel column should be as far as possible be laid on both sides of symmetry.
XQJ series cable tray can be horizontal, vertical laying; to the corner, T-shaped branches; adjustable width, to increase, while Path.

Third, the cable in the cable tray on the level of organization:
1, cable tray should be level with the weak current control cables on top, followed by the general control cables, low voltage power cables, high voltage power cables down the row order. Arranged with the help of such interference shielding, cooling power cable to facilitate the construction.
2, at all levels from the cable tray between layers as follows:
≥ 200 mm control cable
≥ 300 mm power cable
Mechanized laying of cable ≥ 400 mm

Fourth, cable tray size with the calculation:
Cable tray of the total calculated load G:
G total = n1q1 + n2q2 + n3q3 + ... ...
Where: q1, q2, q3, ... ... for the cable weight per unit length (kg / m)
N1, n2, n3 ... ... for the corresponding root of the number of cable
G should be less than the permitted cable tray load
When the cable tray or belt guard outside, the wind should also be included in water-borne and other factors is contained.
Cable tray width b of the calculation:
1, power cable:
B = n1 (d1 + k1) + n2 (d2 + k2) + n3 (d3 + k3) + ... ...
Where: d1, d2, d3, ... ... for the cable directly
n1, n2, n3, ... ... for the corresponding root of the number of cable
k1, k2, k3, ... ... for the cable spacing (k should not be less than the minimum value of d / 4)
2, control cables of the bridge width b calculated: (general cable tray fill rate of about 40% of check)
The total area of the cable set: S = n1? (
The need for cross-sectional area of the bracket:
Where: h for the cable tray clear height

V. NOTES:
1, XOJ-type cable tray of the maximum load devices, support spacing should be less than allowed to load and support span.
2, choose the width of cable tray should have some spare space for future use of additional cables.
3, when the power cables and control cables less may be installed on the same cable tray, but the middle partition to use the power cable and control the laying of cables separated.
4, the level of the laying of cable tray, the connections between the bridge head should be set up in the span of 1 / 4 about the Agency. The level of the cable to 2 meters or so every click fixed, perpendicular to the cable fixed at about 1.5 meters or so.
5, cable tray grounding device should be reliable. Such as the use of bridge as the grounding line, and should be the end of each bridge 16m ??with soft copper wire connection (parallel), the grounding line connected with the total, long-distance cable tray grounding once every 30-50 meters.
6, cable tray installation in addition to shielding cover, in an outdoor installation should be in their top-level installation of protective shield against the sun, and rain. For installation of welding, seam welding pieces around base metal thickness of not less than the thickness of Welded Joints must be treated with preservatives.