Cablofil Cable Tray for the Containment of Power Cables

Cablofil Cable Tray for the Containment of Power Cables

Power Cables
The installation of power cabling systems relies on high quality cable tray systems. Cablofil cable tray takes this further by offering a strong, fast, safe, clean and ventilated cable tray system.



Numerous References
Steel wire armoured (SWA), singles or twin and earth power cables are the electric cable types used in an electrical installation - they carry the power required to run electrical installations.  The choice of a power cable is based mainly on two criteria :

Mechanical Performance:  tension, fire rating, temperature performance, chemical resistance, shock and vibration resistance.

Electrical Performance:  AC or DC, very low, low, medium, high or very high voltage, single-phase, or three-phase cables. Solutions for all low and high voltage cabling applications encountered in the electrical industry can be found by combining these characteristics.
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The Cablofil Cable TraySolution 
All Cablofil cable tray fittings including bends, tees, risers and sets are created to suit the installation on site while maintaining the bend radius of the cables.
Cablofil cable tray was subjected to a series of mechanical tests.  Each reference is able to support power cables.  The load tables shown in the catalogues can be used to select the most suitable cable tray reference.
 
MaintenanceSafety
In some installations it may be necessary to improve the safety of people and/or property.  A sufficiently large protection conductor may be used.  Cablofil cable tray systems provide suitable accessories. Its open structure makes it easy to inspect the cable installation which simplifies any maintenance work that may be required.
 
Cleanliness
Retention of dust, ingression of bacteria and any debris obstructing the cable path are greatly reduced due to the open mesh construction of Cablofil. 
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Testing & Ventilation of Cables
By improving the heat dissipation of power cables, substantial savings can be made on the installation and operation costs. The open structure of Cablofil cable tray maximizes ventilation.
 
The performance level of the cable depends on its electrical resistance. This is proportional to the resistivity, which is in turn proportional to the temperature.  When the temperature rises, the cable resistance increases and the cable
performance drops.

The resistivity of copper varies with temperature.

When electric current flows through the cable, the temperature of the central copper or aluminium conductor increases up to an operating temperature of about 70°C to 80°C.

Heat given off by the cable due to the Joule effect poses no problem in free air.  In a confined space, however, such as inside a closed cable tray or trunking, the cable will heat up and its performance will drop therefore less current will be carried.

Studies show that excessive cable temperature wastes considerable energy.

There are 2 Possible Solutions
A high cost solution would be to increase the cable cross-sections.
A low cost solution is to ventilate the system by installing the cables in Cablofil cable tray.

Cablofil is in fact the nearest thing to a cable in free air as it represents only 10% solid surface area and in many cases is considered as such by standard IEC 60 364 standard. (NFPA 79)

Using an unventilated, or only slightly ventilated, installation method with some configurations (several power cables running in the cable tray) require the use of cables of cross-section 1.5 to 2 times larger than with Cablofil.

A Technical and Financial Advantage
The performance levels of cables supported by Cablofil cable tray are therefore optimized, resulting in significant cost-savings :

* Optimization of the cross-section and therefore the cost of the cable.
* Reduction of the installation time and therefore the cost of labour.
* Reduction of the heating effect and therefore the energy consumption.
   
Cablofil Cable Basket Tray (Wire Mesh) - Catalogue

Fault Test

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